Oracle VM VirtualBox Programming Guide and Reference

Oracle VM
R
VirtualBox
Programming Guide and
Reference
Version 4.3.24
c 2004-2015 Oracle Corporation
http://www.virtualbox.org
Contents
1 Introduction
1.1
Modularity: the building blocks of VirtualBox . . . . . . . . . . . . .
1.2
Two guises of the same “Main API”: the web service or COM/XPCOM
1.3
About web services in general . . . . . . . . . . . . . . . . . . . . . .
1.4
Running the web service . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.1
Command line options of vboxwebsrv . . . . . . . . . . . . .
1.4.2
Authenticating at web service logon . . . . . . . . . . . . . .
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2 Environment-specific notes
2.1
Using the object-oriented web service (OOWS) . . . . . . . . . . . . .
2.1.1
The object-oriented web service for JAX-WS . . . . . . . . . .
2.1.2
The object-oriented web service for Python . . . . . . . . . .
2.1.3
The object-oriented web service for PHP . . . . . . . . . . .
2.2
Using the raw web service with any language . . . . . . . . . . . . .
2.2.1
Raw web service example for Java with Axis . . . . . . . . .
2.2.2
Raw web service example for Perl . . . . . . . . . . . . . . .
2.2.3
Programming considerations for the raw web service . . . .
2.3
Using COM/XPCOM directly . . . . . . . . . . . . . . . . . . . . . . .
2.3.1
Python COM API . . . . . . . . . . . . . . . . . . . . . . . .
2.3.2
Common Python bindings layer . . . . . . . . . . . . . . . .
2.3.3
C++ COM API . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.4
Event queue processing . . . . . . . . . . . . . . . . . . . . .
2.3.5
Visual Basic and Visual Basic Script (VBS) on Windows hosts
2.3.6
C binding to VirtualBox API . . . . . . . . . . . . . . . . . .
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3 Basic VirtualBox concepts; some examples
3.1
Obtaining basic machine information. Reading attributes
3.2
Changing machine settings. Sessions . . . . . . . . . . .
3.3
Launching virtual machines . . . . . . . . . . . . . . . .
3.4
VirtualBox events . . . . . . . . . . . . . . . . . . . . . .
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4 The VirtualBox shell
48
5 Classes (interfaces)
5.1
IAdditionsFacility . . . . . . . . . . . .
5.1.1
Attributes . . . . . . . . . . .
5.2
IAdditionsStateChangedEvent (IEvent)
5.3
IAppliance . . . . . . . . . . . . . . . .
5.3.1
Attributes . . . . . . . . . . .
5.3.2
createVFSExplorer . . . . . . .
5.3.3
getWarnings . . . . . . . . . .
5.3.4
importMachines . . . . . . . .
5.3.5
interpret . . . . . . . . . . . .
5.3.6
read . . . . . . . . . . . . . .
5.3.7
write . . . . . . . . . . . . . .
5.4
IAudioAdapter . . . . . . . . . . . . . .
2
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Contents
5.5
5.6
5.7
5.8
5.9
5.10
5.11
5.12
5.13
5.14
5.4.1
Attributes . . . . . . . . . . . . .
IBIOSSettings . . . . . . . . . . . . . . . .
5.5.1
Attributes . . . . . . . . . . . . .
IBandwidthControl . . . . . . . . . . . . .
5.6.1
Attributes . . . . . . . . . . . . .
5.6.2
createBandwidthGroup . . . . . .
5.6.3
deleteBandwidthGroup . . . . . .
5.6.4
getAllBandwidthGroups . . . . . .
5.6.5
getBandwidthGroup . . . . . . . .
IBandwidthGroup . . . . . . . . . . . . . .
5.7.1
Attributes . . . . . . . . . . . . .
IBandwidthGroupChangedEvent (IEvent) .
5.8.1
Attributes . . . . . . . . . . . . .
ICPUChangedEvent (IEvent) . . . . . . . .
5.9.1
Attributes . . . . . . . . . . . . .
ICPUExecutionCapChangedEvent (IEvent)
5.10.1 Attributes . . . . . . . . . . . . .
ICanShowWindowEvent (IVetoEvent) . . .
IClipboardModeChangedEvent (IEvent) . .
5.12.1 Attributes . . . . . . . . . . . . .
IConsole . . . . . . . . . . . . . . . . . . .
5.13.1 Attributes . . . . . . . . . . . . .
5.13.2 adoptSavedState . . . . . . . . . .
5.13.3 attachUSBDevice . . . . . . . . .
5.13.4 createSharedFolder . . . . . . . .
5.13.5 deleteSnapshot . . . . . . . . . .
5.13.6 deleteSnapshotAndAllChildren . .
5.13.7 deleteSnapshotRange . . . . . . .
5.13.8 detachUSBDevice . . . . . . . . .
5.13.9 discardSavedState . . . . . . . . .
5.13.10 findUSBDeviceByAddress . . . . .
5.13.11 findUSBDeviceById . . . . . . . .
5.13.12 getDeviceActivity . . . . . . . . .
5.13.13 getGuestEnteredACPIMode . . . .
5.13.14 getPowerButtonHandled . . . . .
5.13.15 pause . . . . . . . . . . . . . . . .
5.13.16 powerButton . . . . . . . . . . . .
5.13.17 powerDown . . . . . . . . . . . .
5.13.18 powerUp . . . . . . . . . . . . . .
5.13.19 powerUpPaused . . . . . . . . . .
5.13.20 removeSharedFolder . . . . . . .
5.13.21 reset . . . . . . . . . . . . . . . .
5.13.22 restoreSnapshot . . . . . . . . . .
5.13.23 resume . . . . . . . . . . . . . . .
5.13.24 saveState . . . . . . . . . . . . . .
5.13.25 sleepButton . . . . . . . . . . . .
5.13.26 takeSnapshot . . . . . . . . . . .
5.13.27 teleport . . . . . . . . . . . . . . .
IDHCPServer . . . . . . . . . . . . . . . .
5.14.1 Attributes . . . . . . . . . . . . .
5.14.2 addGlobalOption . . . . . . . . .
5.14.3 addVmSlotOption . . . . . . . . .
5.14.4 getMacOptions . . . . . . . . . . .
3
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Contents
5.15
5.16
5.17
5.18
5.19
5.20
5.21
5.22
5.23
5.24
5.25
5.14.5 getVmSlotOptions . . . . . . . . . .
5.14.6 removeVmSlotOptions . . . . . . .
5.14.7 setConfiguration . . . . . . . . . . .
5.14.8 start . . . . . . . . . . . . . . . . .
5.14.9 stop . . . . . . . . . . . . . . . . . .
IDirectory . . . . . . . . . . . . . . . . . . .
5.15.1 Attributes . . . . . . . . . . . . . .
5.15.2 close . . . . . . . . . . . . . . . . .
5.15.3 read . . . . . . . . . . . . . . . . .
IDisplay . . . . . . . . . . . . . . . . . . . .
5.16.1 completeVHWACommand . . . . .
5.16.2 drawToScreen . . . . . . . . . . . .
5.16.3 getFramebuffer . . . . . . . . . . .
5.16.4 getScreenResolution . . . . . . . . .
5.16.5 invalidateAndUpdate . . . . . . . .
5.16.6 resizeCompleted . . . . . . . . . . .
5.16.7 setFramebuffer . . . . . . . . . . .
5.16.8 setSeamlessMode . . . . . . . . . .
5.16.9 setVideoModeHint . . . . . . . . . .
5.16.10 takeScreenShot . . . . . . . . . . .
5.16.11 takeScreenShotPNGToArray . . . .
5.16.12 takeScreenShotToArray . . . . . . .
5.16.13 viewportChanged . . . . . . . . . .
IDragAndDropModeChangedEvent (IEvent)
5.17.1 Attributes . . . . . . . . . . . . . .
IEmulatedUSB . . . . . . . . . . . . . . . . .
5.18.1 Attributes . . . . . . . . . . . . . .
5.18.2 webcamAttach . . . . . . . . . . . .
5.18.3 webcamDetach . . . . . . . . . . .
IEvent . . . . . . . . . . . . . . . . . . . . .
5.19.1 Attributes . . . . . . . . . . . . . .
5.19.2 setProcessed . . . . . . . . . . . . .
5.19.3 waitProcessed . . . . . . . . . . . .
IEventListener . . . . . . . . . . . . . . . . .
5.20.1 handleEvent . . . . . . . . . . . . .
IEventSource . . . . . . . . . . . . . . . . .
5.21.1 createAggregator . . . . . . . . . .
5.21.2 createListener . . . . . . . . . . . .
5.21.3 eventProcessed . . . . . . . . . . .
5.21.4 fireEvent . . . . . . . . . . . . . . .
5.21.5 getEvent . . . . . . . . . . . . . . .
5.21.6 registerListener . . . . . . . . . . .
5.21.7 unregisterListener . . . . . . . . . .
IEventSourceChangedEvent (IEvent) . . . .
5.22.1 Attributes . . . . . . . . . . . . . .
IExtPack (IExtPackBase) . . . . . . . . . . .
5.23.1 queryObject . . . . . . . . . . . . .
IExtPackBase . . . . . . . . . . . . . . . . . .
5.24.1 Attributes . . . . . . . . . . . . . .
5.24.2 queryLicense . . . . . . . . . . . . .
IExtPackFile (IExtPackBase) . . . . . . . . .
5.25.1 Attributes . . . . . . . . . . . . . .
5.25.2 install . . . . . . . . . . . . . . . . .
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Contents
5.26 IExtPackManager . . . . . . . . . . . . .
5.26.1 Attributes . . . . . . . . . . . .
5.26.2 cleanup . . . . . . . . . . . . . .
5.26.3 find . . . . . . . . . . . . . . . .
5.26.4 isExtPackUsable . . . . . . . . .
5.26.5 openExtPackFile . . . . . . . . .
5.26.6 queryAllPlugInsForFrontend . .
5.26.7 uninstall . . . . . . . . . . . . .
5.27 IExtPackPlugIn . . . . . . . . . . . . . .
5.27.1 Attributes . . . . . . . . . . . .
5.28 IExtraDataCanChangeEvent (IVetoEvent)
5.28.1 Attributes . . . . . . . . . . . .
5.29 IExtraDataChangedEvent (IEvent) . . . .
5.29.1 Attributes . . . . . . . . . . . .
5.30 IFile . . . . . . . . . . . . . . . . . . . .
5.30.1 Attributes . . . . . . . . . . . .
5.30.2 close . . . . . . . . . . . . . . .
5.30.3 queryInfo . . . . . . . . . . . . .
5.30.4 read . . . . . . . . . . . . . . .
5.30.5 readAt . . . . . . . . . . . . . .
5.30.6 seek . . . . . . . . . . . . . . . .
5.30.7 setACL . . . . . . . . . . . . . .
5.30.8 write . . . . . . . . . . . . . . .
5.30.9 writeAt . . . . . . . . . . . . . .
5.31 IFramebuffer . . . . . . . . . . . . . . . .
5.31.1 Attributes . . . . . . . . . . . .
5.31.2 getVisibleRegion . . . . . . . . .
5.31.3 lock . . . . . . . . . . . . . . . .
5.31.4 notify3DEvent . . . . . . . . . .
5.31.5 notifyUpdate . . . . . . . . . . .
5.31.6 processVHWACommand . . . .
5.31.7 requestResize . . . . . . . . . .
5.31.8 setVisibleRegion . . . . . . . . .
5.31.9 unlock . . . . . . . . . . . . . .
5.31.10 videoModeSupported . . . . . .
5.32 IFramebufferOverlay (IFramebuffer) . .
5.32.1 Attributes . . . . . . . . . . . .
5.32.2 move . . . . . . . . . . . . . . .
5.33 IFsObjInfo . . . . . . . . . . . . . . . . .
5.33.1 Attributes . . . . . . . . . . . .
5.34 IGuest . . . . . . . . . . . . . . . . . . .
5.34.1 Attributes . . . . . . . . . . . .
5.34.2 createSession . . . . . . . . . .
5.34.3 dragGHDropped . . . . . . . . .
5.34.4 dragGHGetData . . . . . . . . .
5.34.5 dragGHPending . . . . . . . . .
5.34.6 dragHGDrop . . . . . . . . . . .
5.34.7 dragHGEnter . . . . . . . . . . .
5.34.8 dragHGLeave . . . . . . . . . .
5.34.9 dragHGMove . . . . . . . . . . .
5.34.10 dragHGPutData . . . . . . . . .
5.34.11 findSession . . . . . . . . . . . .
5.34.12 getAdditionsStatus . . . . . . .
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Contents
5.35
5.36
5.37
5.38
5.39
5.40
5.41
5.42
5.43
5.44
5.45
5.46
5.47
5.48
5.49
5.50
5.51
5.52
5.53
5.54
5.55
5.56
5.57
5.58
5.34.13 getFacilityStatus . . . . . . . . . . . . . . . . .
5.34.14 internalGetStatistics . . . . . . . . . . . . . . .
5.34.15 setCredentials . . . . . . . . . . . . . . . . . .
5.34.16 updateGuestAdditions . . . . . . . . . . . . . .
IGuestDirectory (IDirectory) . . . . . . . . . . . . . . .
IGuestFile (IFile) . . . . . . . . . . . . . . . . . . . . .
IGuestFileEvent (IGuestSessionEvent) . . . . . . . . . .
5.37.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestFileIOEvent (IGuestFileEvent) . . . . . . . . . .
5.38.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestFileOffsetChangedEvent (IGuestFileIOEvent) . .
IGuestFileReadEvent (IGuestFileIOEvent) . . . . . . . .
5.40.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestFileRegisteredEvent (IGuestFileEvent) . . . . . .
5.41.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestFileStateChangedEvent (IGuestFileEvent) . . . .
5.42.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestFileWriteEvent (IGuestFileIOEvent) . . . . . . .
IGuestFsObjInfo (IFsObjInfo) . . . . . . . . . . . . . . .
IGuestKeyboardEvent (IEvent) . . . . . . . . . . . . . .
5.45.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestMonitorChangedEvent (IEvent) . . . . . . . . . .
5.46.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestMouseEvent (IReusableEvent) . . . . . . . . . .
5.47.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestMultiTouchEvent (IEvent) . . . . . . . . . . . . .
5.48.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestOSType . . . . . . . . . . . . . . . . . . . . . . .
5.49.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestProcess (IProcess) . . . . . . . . . . . . . . . . .
IGuestProcessEvent (IGuestSessionEvent) . . . . . . . .
5.51.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestProcessIOEvent (IGuestProcessEvent) . . . . . .
5.52.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestProcessInputNotifyEvent (IGuestProcessIOEvent)
5.53.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestProcessOutputEvent (IGuestProcessIOEvent) . .
5.54.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestProcessRegisteredEvent (IGuestProcessEvent) . .
5.55.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestProcessStateChangedEvent (IGuestProcessEvent)
5.56.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestPropertyChangedEvent (IMachineEvent) . . . . .
5.57.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestSession . . . . . . . . . . . . . . . . . . . . . . .
5.58.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.58.2 close . . . . . . . . . . . . . . . . . . . . . . .
5.58.3 copyFrom . . . . . . . . . . . . . . . . . . . .
5.58.4 copyTo . . . . . . . . . . . . . . . . . . . . . .
5.58.5 directoryCreate . . . . . . . . . . . . . . . . .
5.58.6 directoryCreateTemp . . . . . . . . . . . . . .
5.58.7 directoryExists . . . . . . . . . . . . . . . . . .
5.58.8 directoryOpen . . . . . . . . . . . . . . . . . .
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107
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121
122
122
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Contents
5.59
5.60
5.61
5.62
5.63
5.58.9 directoryQueryInfo . . . . . . . . . . . . . . .
5.58.10 directoryRemove . . . . . . . . . . . . . . . .
5.58.11 directoryRemoveRecursive . . . . . . . . . . .
5.58.12 directoryRename . . . . . . . . . . . . . . . .
5.58.13 directorySetACL . . . . . . . . . . . . . . . . .
5.58.14 environmentClear . . . . . . . . . . . . . . . .
5.58.15 environmentGet . . . . . . . . . . . . . . . . .
5.58.16 environmentSet . . . . . . . . . . . . . . . . .
5.58.17 environmentUnset . . . . . . . . . . . . . . . .
5.58.18 fileCreateTemp . . . . . . . . . . . . . . . . . .
5.58.19 fileExists . . . . . . . . . . . . . . . . . . . . .
5.58.20 fileOpen . . . . . . . . . . . . . . . . . . . . .
5.58.21 fileOpenEx . . . . . . . . . . . . . . . . . . . .
5.58.22 fileQueryInfo . . . . . . . . . . . . . . . . . . .
5.58.23 fileQuerySize . . . . . . . . . . . . . . . . . .
5.58.24 fileRemove . . . . . . . . . . . . . . . . . . . .
5.58.25 fileRename . . . . . . . . . . . . . . . . . . . .
5.58.26 fileSetACL . . . . . . . . . . . . . . . . . . . .
5.58.27 processCreate . . . . . . . . . . . . . . . . . .
5.58.28 processCreateEx . . . . . . . . . . . . . . . . .
5.58.29 processGet . . . . . . . . . . . . . . . . . . . .
5.58.30 symlinkCreate . . . . . . . . . . . . . . . . . .
5.58.31 symlinkExists . . . . . . . . . . . . . . . . . .
5.58.32 symlinkRead . . . . . . . . . . . . . . . . . . .
5.58.33 symlinkRemoveDirectory . . . . . . . . . . . .
5.58.34 symlinkRemoveFile . . . . . . . . . . . . . . .
5.58.35 waitFor . . . . . . . . . . . . . . . . . . . . . .
5.58.36 waitForArray . . . . . . . . . . . . . . . . . . .
IGuestSessionEvent (IEvent) . . . . . . . . . . . . . . .
5.59.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestSessionRegisteredEvent (IGuestSessionEvent) . .
5.60.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestSessionStateChangedEvent (IGuestSessionEvent)
5.61.1 Attributes . . . . . . . . . . . . . . . . . . . .
IGuestUserStateChangedEvent (IEvent) . . . . . . . . .
5.62.1 Attributes . . . . . . . . . . . . . . . . . . . .
IHost . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.63.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.63.2 createHostOnlyNetworkInterface . . . . . . . .
5.63.3 createUSBDeviceFilter . . . . . . . . . . . . .
5.63.4 findHostDVDDrive . . . . . . . . . . . . . . . .
5.63.5 findHostFloppyDrive . . . . . . . . . . . . . .
5.63.6 findHostNetworkInterfaceById . . . . . . . . .
5.63.7 findHostNetworkInterfaceByName . . . . . . .
5.63.8 findHostNetworkInterfacesOfType . . . . . . .
5.63.9 findUSBDeviceByAddress . . . . . . . . . . . .
5.63.10 findUSBDeviceById . . . . . . . . . . . . . . .
5.63.11 generateMACAddress . . . . . . . . . . . . . .
5.63.12 getProcessorCPUIDLeaf . . . . . . . . . . . . .
5.63.13 getProcessorDescription . . . . . . . . . . . . .
5.63.14 getProcessorFeature . . . . . . . . . . . . . . .
5.63.15 getProcessorSpeed . . . . . . . . . . . . . . .
5.63.16 insertUSBDeviceFilter . . . . . . . . . . . . . .
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Contents
5.64
5.65
5.66
5.67
5.68
5.69
5.70
5.71
5.63.17 removeHostOnlyNetworkInterface . . . . . . . . .
5.63.18 removeUSBDeviceFilter . . . . . . . . . . . . . . .
IHostNameResolutionConfigurationChangeEvent (IEvent) .
IHostNetworkInterface . . . . . . . . . . . . . . . . . . . .
5.65.1 Attributes . . . . . . . . . . . . . . . . . . . . . .
5.65.2 DHCPRediscover . . . . . . . . . . . . . . . . . . .
5.65.3 enableDynamicIPConfig . . . . . . . . . . . . . . .
5.65.4 enableStaticIPConfig . . . . . . . . . . . . . . . .
5.65.5 enableStaticIPConfigV6 . . . . . . . . . . . . . . .
IHostPCIDevicePlugEvent (IMachineEvent) . . . . . . . . .
5.66.1 Attributes . . . . . . . . . . . . . . . . . . . . . .
IHostUSBDevice (IUSBDevice) . . . . . . . . . . . . . . . .
5.67.1 Attributes . . . . . . . . . . . . . . . . . . . . . .
IHostUSBDeviceFilter (IUSBDeviceFilter) . . . . . . . . . .
5.68.1 Attributes . . . . . . . . . . . . . . . . . . . . . .
IHostVideoInputDevice . . . . . . . . . . . . . . . . . . . .
5.69.1 Attributes . . . . . . . . . . . . . . . . . . . . . .
IInternalMachineControl . . . . . . . . . . . . . . . . . . .
5.70.1 adoptSavedState . . . . . . . . . . . . . . . . . . .
5.70.2 autoCaptureUSBDevices . . . . . . . . . . . . . .
5.70.3 beginPowerUp . . . . . . . . . . . . . . . . . . . .
5.70.4 beginPoweringDown . . . . . . . . . . . . . . . .
5.70.5 beginSavingState . . . . . . . . . . . . . . . . . .
5.70.6 beginTakingSnapshot . . . . . . . . . . . . . . . .
5.70.7 captureUSBDevice . . . . . . . . . . . . . . . . . .
5.70.8 deleteSnapshot . . . . . . . . . . . . . . . . . . .
5.70.9 detachAllUSBDevices . . . . . . . . . . . . . . . .
5.70.10 detachUSBDevice . . . . . . . . . . . . . . . . . .
5.70.11 ejectMedium . . . . . . . . . . . . . . . . . . . . .
5.70.12 endPowerUp . . . . . . . . . . . . . . . . . . . . .
5.70.13 endPoweringDown . . . . . . . . . . . . . . . . .
5.70.14 endSavingState . . . . . . . . . . . . . . . . . . .
5.70.15 endTakingSnapshot . . . . . . . . . . . . . . . . .
5.70.16 finishOnlineMergeMedium . . . . . . . . . . . . .
5.70.17 lockMedia . . . . . . . . . . . . . . . . . . . . . .
5.70.18 onSessionEnd . . . . . . . . . . . . . . . . . . . .
5.70.19 pullGuestProperties . . . . . . . . . . . . . . . . .
5.70.20 pushGuestProperty . . . . . . . . . . . . . . . . .
5.70.21 reportVmStatistics . . . . . . . . . . . . . . . . . .
5.70.22 restoreSnapshot . . . . . . . . . . . . . . . . . . .
5.70.23 runUSBDeviceFilters . . . . . . . . . . . . . . . .
5.70.24 setRemoveSavedStateFile . . . . . . . . . . . . . .
5.70.25 unlockMedia . . . . . . . . . . . . . . . . . . . . .
5.70.26 updateState . . . . . . . . . . . . . . . . . . . . .
IInternalSessionControl . . . . . . . . . . . . . . . . . . . .
5.71.1 accessGuestProperty . . . . . . . . . . . . . . . . .
5.71.2 assignRemoteMachine . . . . . . . . . . . . . . .
5.71.3 enableVMMStatistics . . . . . . . . . . . . . . . .
5.71.4 enumerateGuestProperties . . . . . . . . . . . . .
5.71.5 getPID . . . . . . . . . . . . . . . . . . . . . . . .
5.71.6 getRemoteConsole . . . . . . . . . . . . . . . . . .
5.71.7 onBandwidthGroupChange . . . . . . . . . . . . .
5.71.8 onCPUChange . . . . . . . . . . . . . . . . . . . .
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Contents
5.71.9 onCPUExecutionCapChange .
5.71.10 onClipboardModeChange . . .
5.71.11 onDragAndDropModeChange
5.71.12 onMediumChange . . . . . . .
5.71.13 onNetworkAdapterChange . .
5.71.14 onParallelPortChange . . . . .
5.71.15 onSerialPortChange . . . . . .
5.71.16 onSharedFolderChange . . . .
5.71.17 onShowWindow . . . . . . . .
5.71.18 onStorageControllerChange .
5.71.19 onStorageDeviceChange . . .
5.71.20 onUSBControllerChange . . .
5.71.21 onUSBDeviceAttach . . . . . .
5.71.22 onUSBDeviceDetach . . . . . .
5.71.23 onVRDEServerChange . . . .
5.71.24 onVideoCaptureChange . . . .
5.71.25 onlineMergeMedium . . . . .
5.71.26 pauseWithReason . . . . . . .
5.71.27 resumeWithReason . . . . . .
5.71.28 saveStateWithReason . . . . .
5.71.29 uninitialize . . . . . . . . . . .
5.71.30 updateMachineState . . . . .
5.72 IKeyboard . . . . . . . . . . . . . . . .
5.72.1 Attributes . . . . . . . . . . .
5.72.2 putCAD . . . . . . . . . . . . .
5.72.3 putScancode . . . . . . . . . .
5.72.4 putScancodes . . . . . . . . .
5.73 IKeyboardLedsChangedEvent (IEvent)
5.73.1 Attributes . . . . . . . . . . .
5.74 IMachine . . . . . . . . . . . . . . . . .
5.74.1 Attributes . . . . . . . . . . .
5.74.2 addStorageController . . . . .
5.74.3 addUSBController . . . . . . .
5.74.4 attachDevice . . . . . . . . . .
5.74.5 attachDeviceWithoutMedium .
5.74.6 attachHostPCIDevice . . . . .
5.74.7 canShowConsoleWindow . . .
5.74.8 cloneTo . . . . . . . . . . . . .
5.74.9 createSharedFolder . . . . . .
5.74.10 deleteConfig . . . . . . . . . .
5.74.11 deleteGuestProperty . . . . . .
5.74.12 detachDevice . . . . . . . . . .
5.74.13 detachHostPCIDevice . . . . .
5.74.14 discardSettings . . . . . . . .
5.74.15 enumerateGuestProperties . .
5.74.16 exportTo . . . . . . . . . . . .
5.74.17 findSnapshot . . . . . . . . . .
5.74.18 getBootOrder . . . . . . . . .
5.74.19 getCPUIDLeaf . . . . . . . . .
5.74.20 getCPUProperty . . . . . . . .
5.74.21 getCPUStatus . . . . . . . . .
5.74.22 getExtraData . . . . . . . . . .
5.74.23 getExtraDataKeys . . . . . . .
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Contents
5.74.24 getGuestProperty . . . . . . . . . . .
5.74.25 getGuestPropertyTimestamp . . . . .
5.74.26 getGuestPropertyValue . . . . . . . .
5.74.27 getHWVirtExProperty . . . . . . . . .
5.74.28 getMedium . . . . . . . . . . . . . . .
5.74.29 getMediumAttachment . . . . . . . .
5.74.30 getMediumAttachmentsOfController .
5.74.31 getNetworkAdapter . . . . . . . . . .
5.74.32 getParallelPort . . . . . . . . . . . . .
5.74.33 getSerialPort . . . . . . . . . . . . . .
5.74.34 getStorageControllerByInstance . . .
5.74.35 getStorageControllerByName . . . . .
5.74.36 getUSBControllerByName . . . . . .
5.74.37 getUSBControllerCountByType . . . .
5.74.38 hotPlugCPU . . . . . . . . . . . . . .
5.74.39 hotUnplugCPU . . . . . . . . . . . . .
5.74.40 launchVMProcess . . . . . . . . . . .
5.74.41 lockMachine . . . . . . . . . . . . . .
5.74.42 mountMedium . . . . . . . . . . . . .
5.74.43 nonRotationalDevice . . . . . . . . .
5.74.44 passthroughDevice . . . . . . . . . .
5.74.45 queryLogFilename . . . . . . . . . . .
5.74.46 querySavedGuestScreenInfo . . . . .
5.74.47 querySavedScreenshotPNGSize . . .
5.74.48 querySavedThumbnailSize . . . . . .
5.74.49 readLog . . . . . . . . . . . . . . . .
5.74.50 readSavedScreenshotPNGToArray . .
5.74.51 readSavedThumbnailPNGToArray . .
5.74.52 readSavedThumbnailToArray . . . . .
5.74.53 removeAllCPUIDLeaves . . . . . . . .
5.74.54 removeCPUIDLeaf . . . . . . . . . . .
5.74.55 removeSharedFolder . . . . . . . . .
5.74.56 removeStorageController . . . . . . .
5.74.57 removeUSBController . . . . . . . . .
5.74.58 saveSettings . . . . . . . . . . . . . .
5.74.59 setAutoDiscardForDevice . . . . . . .
5.74.60 setBandwidthGroupForDevice . . . .
5.74.61 setBootOrder . . . . . . . . . . . . . .
5.74.62 setCPUIDLeaf . . . . . . . . . . . . .
5.74.63 setCPUProperty . . . . . . . . . . . .
5.74.64 setExtraData . . . . . . . . . . . . . .
5.74.65 setGuestProperty . . . . . . . . . . .
5.74.66 setGuestPropertyValue . . . . . . . .
5.74.67 setHWVirtExProperty . . . . . . . . .
5.74.68 setHotPluggableForDevice . . . . . .
5.74.69 setNoBandwidthGroupForDevice . . .
5.74.70 setSettingsFilePath . . . . . . . . . .
5.74.71 setStorageControllerBootable . . . .
5.74.72 showConsoleWindow . . . . . . . . .
5.74.73 temporaryEjectDevice . . . . . . . . .
5.74.74 unmountMedium . . . . . . . . . . .
5.74.75 unregister . . . . . . . . . . . . . . .
5.75 IMachineDataChangedEvent (IMachineEvent)
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Contents
5.75.1 Attributes . . . . . . . . . . . . . . .
5.76 IMachineDebugger . . . . . . . . . . . . . . .
5.76.1 Attributes . . . . . . . . . . . . . . .
5.76.2 detectOS . . . . . . . . . . . . . . . .
5.76.3 dumpGuestCore . . . . . . . . . . . .
5.76.4 dumpGuestStack . . . . . . . . . . .
5.76.5 dumpHostProcessCore . . . . . . . .
5.76.6 dumpStats . . . . . . . . . . . . . . .
5.76.7 getRegister . . . . . . . . . . . . . . .
5.76.8 getRegisters . . . . . . . . . . . . . .
5.76.9 getStats . . . . . . . . . . . . . . . .
5.76.10 info . . . . . . . . . . . . . . . . . . .
5.76.11 injectNMI . . . . . . . . . . . . . . .
5.76.12 modifyLogDestinations . . . . . . . .
5.76.13 modifyLogFlags . . . . . . . . . . . .
5.76.14 modifyLogGroups . . . . . . . . . . .
5.76.15 readPhysicalMemory . . . . . . . . .
5.76.16 readVirtualMemory . . . . . . . . . .
5.76.17 resetStats . . . . . . . . . . . . . . . .
5.76.18 setRegister . . . . . . . . . . . . . . .
5.76.19 setRegisters . . . . . . . . . . . . . .
5.76.20 writePhysicalMemory . . . . . . . . .
5.76.21 writeVirtualMemory . . . . . . . . . .
5.77 IMachineEvent (IEvent) . . . . . . . . . . . .
5.77.1 Attributes . . . . . . . . . . . . . . .
5.78 IMachineRegisteredEvent (IMachineEvent) . .
5.78.1 Attributes . . . . . . . . . . . . . . .
5.79 IMachineStateChangedEvent (IMachineEvent)
5.79.1 Attributes . . . . . . . . . . . . . . .
5.80 IManagedObjectRef . . . . . . . . . . . . . . .
5.80.1 getInterfaceName . . . . . . . . . . .
5.80.2 release . . . . . . . . . . . . . . . . .
5.81 IMedium . . . . . . . . . . . . . . . . . . . . .
5.81.1 Attributes . . . . . . . . . . . . . . .
5.81.2 cloneTo . . . . . . . . . . . . . . . . .
5.81.3 cloneToBase . . . . . . . . . . . . . .
5.81.4 close . . . . . . . . . . . . . . . . . .
5.81.5 compact . . . . . . . . . . . . . . . .
5.81.6 createBaseStorage . . . . . . . . . . .
5.81.7 createDiffStorage . . . . . . . . . . .
5.81.8 deleteStorage . . . . . . . . . . . . .
5.81.9 getProperties . . . . . . . . . . . . . .
5.81.10 getProperty . . . . . . . . . . . . . .
5.81.11 getSnapshotIds . . . . . . . . . . . .
5.81.12 lockRead . . . . . . . . . . . . . . . .
5.81.13 lockWrite . . . . . . . . . . . . . . . .
5.81.14 mergeTo . . . . . . . . . . . . . . . .
5.81.15 refreshState . . . . . . . . . . . . . .
5.81.16 reset . . . . . . . . . . . . . . . . . .
5.81.17 resize . . . . . . . . . . . . . . . . . .
5.81.18 setIds . . . . . . . . . . . . . . . . . .
5.81.19 setLocation . . . . . . . . . . . . . . .
5.81.20 setProperties . . . . . . . . . . . . . .
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Contents
5.81.21 setProperty . . . . . . . . . . . . . . . . . . . . . . . .
5.82 IMediumAttachment . . . . . . . . . . . . . . . . . . . . . . .
5.82.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.83 IMediumChangedEvent (IEvent) . . . . . . . . . . . . . . . . .
5.83.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.84 IMediumFormat . . . . . . . . . . . . . . . . . . . . . . . . . .
5.84.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.84.2 describeFileExtensions . . . . . . . . . . . . . . . . .
5.84.3 describeProperties . . . . . . . . . . . . . . . . . . . .
5.85 IMediumRegisteredEvent (IEvent) . . . . . . . . . . . . . . . .
5.85.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.86 IMouse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.86.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.86.2 putEventMultiTouch . . . . . . . . . . . . . . . . . . .
5.86.3 putEventMultiTouchString . . . . . . . . . . . . . . .
5.86.4 putMouseEvent . . . . . . . . . . . . . . . . . . . . .
5.86.5 putMouseEventAbsolute . . . . . . . . . . . . . . . .
5.87 IMouseCapabilityChangedEvent (IEvent) . . . . . . . . . . . .
5.87.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.88 IMousePointerShapeChangedEvent (IEvent) . . . . . . . . . .
5.88.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.89 INATEngine . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.89.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.89.2 addRedirect . . . . . . . . . . . . . . . . . . . . . . .
5.89.3 getNetworkSettings . . . . . . . . . . . . . . . . . . .
5.89.4 removeRedirect . . . . . . . . . . . . . . . . . . . . .
5.89.5 setNetworkSettings . . . . . . . . . . . . . . . . . . .
5.90 INATNetwork . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.90.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.90.2 addLocalMapping . . . . . . . . . . . . . . . . . . . .
5.90.3 addPortForwardRule . . . . . . . . . . . . . . . . . .
5.90.4 removePortForwardRule . . . . . . . . . . . . . . . .
5.90.5 start . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.90.6 stop . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.91 INATNetworkAlterEvent (INATNetworkChangedEvent) . . . .
5.92 INATNetworkChangedEvent (IEvent) . . . . . . . . . . . . . .
5.92.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.93 INATNetworkCreationDeletionEvent (INATNetworkAlterEvent)
5.93.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.94 INATNetworkPortForwardEvent (INATNetworkAlterEvent) . .
5.94.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.95 INATNetworkSettingEvent (INATNetworkAlterEvent) . . . . .
5.95.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.96 INATNetworkStartStopEvent (INATNetworkChangedEvent) . .
5.96.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.97 INATRedirectEvent (IMachineEvent) . . . . . . . . . . . . . .
5.97.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.98 INetworkAdapter . . . . . . . . . . . . . . . . . . . . . . . . .
5.98.1 Attributes . . . . . . . . . . . . . . . . . . . . . . . .
5.98.2 getProperties . . . . . . . . . . . . . . . . . . . . . . .
5.98.3 getProperty . . . . . . . . . . . . . . . . . . . . . . .
5.98.4 setProperty . . . . . . . . . . . . . . . . . . . . . . . .
5.99 INetworkAdapterChangedEvent (IEvent) . . . . . . . . . . . .
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Contents
5.99.1 Attributes . . . . . . . . . . . . . . .
5.100 IPCIAddress . . . . . . . . . . . . . . . . . . .
5.100.1 Attributes . . . . . . . . . . . . . . .
5.100.2 asLong . . . . . . . . . . . . . . . . .
5.100.3 fromLong . . . . . . . . . . . . . . . .
5.101 IPCIDeviceAttachment . . . . . . . . . . . . .
5.101.1 Attributes . . . . . . . . . . . . . . .
5.102 IParallelPort . . . . . . . . . . . . . . . . . . .
5.102.1 Attributes . . . . . . . . . . . . . . .
5.103 IParallelPortChangedEvent (IEvent) . . . . . .
5.103.1 Attributes . . . . . . . . . . . . . . .
5.104 IPerformanceCollector . . . . . . . . . . . . .
5.104.1 Attributes . . . . . . . . . . . . . . .
5.104.2 disableMetrics . . . . . . . . . . . . .
5.104.3 enableMetrics . . . . . . . . . . . . .
5.104.4 getMetrics . . . . . . . . . . . . . . .
5.104.5 queryMetricsData . . . . . . . . . . .
5.104.6 setupMetrics . . . . . . . . . . . . . .
5.105 IPerformanceMetric . . . . . . . . . . . . . . .
5.105.1 Attributes . . . . . . . . . . . . . . .
5.106 IProcess . . . . . . . . . . . . . . . . . . . . .
5.106.1 Attributes . . . . . . . . . . . . . . .
5.106.2 read . . . . . . . . . . . . . . . . . .
5.106.3 terminate . . . . . . . . . . . . . . . .
5.106.4 waitFor . . . . . . . . . . . . . . . . .
5.106.5 waitForArray . . . . . . . . . . . . . .
5.106.6 write . . . . . . . . . . . . . . . . . .
5.106.7 writeArray . . . . . . . . . . . . . . .
5.107 IProgress . . . . . . . . . . . . . . . . . . . . .
5.107.1 Attributes . . . . . . . . . . . . . . .
5.107.2 cancel . . . . . . . . . . . . . . . . .
5.107.3 setCurrentOperationProgress . . . . .
5.107.4 setNextOperation . . . . . . . . . . .
5.107.5 waitForAsyncProgressCompletion . .
5.107.6 waitForCompletion . . . . . . . . . .
5.107.7 waitForOperationCompletion . . . . .
5.108 IReusableEvent (IEvent) . . . . . . . . . . . .
5.108.1 Attributes . . . . . . . . . . . . . . .
5.108.2 reuse . . . . . . . . . . . . . . . . . .
5.109 IRuntimeErrorEvent (IEvent) . . . . . . . . . .
5.109.1 Attributes . . . . . . . . . . . . . . .
5.110 ISerialPort . . . . . . . . . . . . . . . . . . . .
5.110.1 Attributes . . . . . . . . . . . . . . .
5.111 ISerialPortChangedEvent (IEvent) . . . . . . .
5.111.1 Attributes . . . . . . . . . . . . . . .
5.112 ISession . . . . . . . . . . . . . . . . . . . . .
5.112.1 Attributes . . . . . . . . . . . . . . .
5.112.2 unlockMachine . . . . . . . . . . . .
5.113 ISessionStateChangedEvent (IMachineEvent) .
5.113.1 Attributes . . . . . . . . . . . . . . .
5.114 ISharedFolder . . . . . . . . . . . . . . . . . .
5.114.1 Attributes . . . . . . . . . . . . . . .
5.115 ISharedFolderChangedEvent (IEvent) . . . . .
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Contents
5.115.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.116 IShowWindowEvent (IEvent) . . . . . . . . . . . . . .
5.116.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.117 ISnapshot . . . . . . . . . . . . . . . . . . . . . . . . .
5.117.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.117.2 getChildrenCount . . . . . . . . . . . . . . . .
5.118 ISnapshotChangedEvent (ISnapshotEvent) . . . . . . .
5.119 ISnapshotDeletedEvent (ISnapshotEvent) . . . . . . . .
5.120 ISnapshotEvent (IMachineEvent) . . . . . . . . . . . .
5.120.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.121 ISnapshotTakenEvent (ISnapshotEvent) . . . . . . . . .
5.122 IStateChangedEvent (IEvent) . . . . . . . . . . . . . .
5.122.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.123 IStorageController . . . . . . . . . . . . . . . . . . . .
5.123.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.124 IStorageControllerChangedEvent (IEvent) . . . . . . .
5.125 IStorageDeviceChangedEvent (IEvent) . . . . . . . . .
5.125.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.126 ISystemProperties . . . . . . . . . . . . . . . . . . . . .
5.126.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.126.2 getDefaultIoCacheSettingForStorageController
5.126.3 getDeviceTypesForStorageBus . . . . . . . . .
5.126.4 getMaxDevicesPerPortForStorageBus . . . . .
5.126.5 getMaxInstancesOfStorageBus . . . . . . . . .
5.126.6 getMaxInstancesOfUSBControllerType . . . . .
5.126.7 getMaxNetworkAdapters . . . . . . . . . . . .
5.126.8 getMaxNetworkAdaptersOfType . . . . . . . .
5.126.9 getMaxPortCountForStorageBus . . . . . . . .
5.126.10getMinPortCountForStorageBus . . . . . . . .
5.127 IToken . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.127.1 abandon . . . . . . . . . . . . . . . . . . . . .
5.127.2 dummy . . . . . . . . . . . . . . . . . . . . . .
5.128 IUSBController . . . . . . . . . . . . . . . . . . . . . .
5.128.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.129 IUSBControllerChangedEvent (IEvent) . . . . . . . . .
5.130 IUSBDevice . . . . . . . . . . . . . . . . . . . . . . . .
5.130.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.131 IUSBDeviceFilter . . . . . . . . . . . . . . . . . . . . .
5.131.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.132 IUSBDeviceFilters . . . . . . . . . . . . . . . . . . . . .
5.132.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.132.2 createDeviceFilter . . . . . . . . . . . . . . . .
5.132.3 insertDeviceFilter . . . . . . . . . . . . . . . .
5.132.4 removeDeviceFilter . . . . . . . . . . . . . . .
5.133 IUSBDeviceStateChangedEvent (IEvent) . . . . . . . .
5.133.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.134 IVBoxSVCAvailabilityChangedEvent (IEvent) . . . . . .
5.134.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.135 IVFSExplorer . . . . . . . . . . . . . . . . . . . . . . .
5.135.1 Attributes . . . . . . . . . . . . . . . . . . . .
5.135.2 cd . . . . . . . . . . . . . . . . . . . . . . . . .
5.135.3 cdUp . . . . . . . . . . . . . . . . . . . . . . .
5.135.4 entryList . . . . . . . . . . . . . . . . . . . . .
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Contents
5.136
5.137
5.138
5.139
5.140
5.141
5.142
5.143
5.144
5.145
5.135.5 exists . . . . . . . . . . . . . . . .
5.135.6 remove . . . . . . . . . . . . . . .
5.135.7 update . . . . . . . . . . . . . . .
IVRDEServer . . . . . . . . . . . . . . . . .
5.136.1 Attributes . . . . . . . . . . . . .
5.136.2 getVRDEProperty . . . . . . . . .
5.136.3 setVRDEProperty . . . . . . . . .
IVRDEServerChangedEvent (IEvent) . . .
IVRDEServerInfo . . . . . . . . . . . . . .
5.138.1 Attributes . . . . . . . . . . . . .
IVRDEServerInfoChangedEvent (IEvent) .
IVetoEvent (IEvent) . . . . . . . . . . . . .
5.140.1 addVeto . . . . . . . . . . . . . .
5.140.2 getVetos . . . . . . . . . . . . . .
5.140.3 isVetoed . . . . . . . . . . . . . .
IVideoCaptureChangedEvent (IEvent) . . .
IVirtualBox . . . . . . . . . . . . . . . . . .
5.142.1 Attributes . . . . . . . . . . . . .
5.142.2 checkFirmwarePresent . . . . . .
5.142.3 composeMachineFilename . . . .
5.142.4 createAppliance . . . . . . . . . .
5.142.5 createDHCPServer . . . . . . . . .
5.142.6 createHardDisk . . . . . . . . . .
5.142.7 createMachine . . . . . . . . . . .
5.142.8 createNATNetwork . . . . . . . .
5.142.9 createSharedFolder . . . . . . . .
5.142.10findDHCPServerByNetworkName
5.142.11findMachine . . . . . . . . . . . .
5.142.12findNATNetworkByName . . . . .
5.142.13getExtraData . . . . . . . . . . . .
5.142.14getExtraDataKeys . . . . . . . . .
5.142.15getGuestOSType . . . . . . . . . .
5.142.16getMachineStates . . . . . . . . .
5.142.17getMachinesByGroups . . . . . .
5.142.18openMachine . . . . . . . . . . .
5.142.19openMedium . . . . . . . . . . . .
5.142.20registerMachine . . . . . . . . . .
5.142.21removeDHCPServer . . . . . . . .
5.142.22removeNATNetwork . . . . . . . .
5.142.23removeSharedFolder . . . . . . .
5.142.24setExtraData . . . . . . . . . . . .
5.142.25setSettingsSecret . . . . . . . . .
IVirtualBoxClient . . . . . . . . . . . . . .
5.143.1 Attributes . . . . . . . . . . . . .
5.143.2 checkMachineError . . . . . . . .
IVirtualBoxErrorInfo . . . . . . . . . . . .
5.144.1 Attributes . . . . . . . . . . . . .
IVirtualSystemDescription . . . . . . . . .
5.145.1 Attributes . . . . . . . . . . . . .
5.145.2 addDescription . . . . . . . . . .
5.145.3 getDescription . . . . . . . . . . .
5.145.4 getDescriptionByType . . . . . . .
5.145.5 getValuesByType . . . . . . . . . .
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Contents
5.145.6 setFinalValues . .
5.146 IWebsessionManager . . .
5.146.1 getSessionObject
5.146.2 logoff . . . . . . .
5.146.3 logon . . . . . . .
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6 Enumerations (enums)
6.1
AccessMode . . . . . . . . . . . . .
6.2
AdditionsFacilityClass . . . . . . . .
6.3
AdditionsFacilityStatus . . . . . . .
6.4
AdditionsFacilityType . . . . . . . .
6.5
AdditionsRunLevelType . . . . . . .
6.6
AdditionsUpdateFlag . . . . . . . .
6.7
AudioControllerType . . . . . . . .
6.8
AudioDriverType . . . . . . . . . .
6.9
AuthType . . . . . . . . . . . . . . .
6.10 AutostopType . . . . . . . . . . . .
6.11 BIOSBootMenuMode . . . . . . . .
6.12 BandwidthGroupType . . . . . . . .
6.13 CPUPropertyType . . . . . . . . . .
6.14 ChipsetType . . . . . . . . . . . . .
6.15 CleanupMode . . . . . . . . . . . .
6.16 ClipboardMode . . . . . . . . . . .
6.17 CloneMode . . . . . . . . . . . . .
6.18 CloneOptions . . . . . . . . . . . .
6.19 CopyFileFlag . . . . . . . . . . . . .
6.20 DataFlags . . . . . . . . . . . . . .
6.21 DataType . . . . . . . . . . . . . . .
6.22 DeviceActivity . . . . . . . . . . . .
6.23 DeviceType . . . . . . . . . . . . .
6.24 DhcpOpt . . . . . . . . . . . . . . .
6.25 DirectoryCreateFlag . . . . . . . . .
6.26 DirectoryOpenFlag . . . . . . . . .
6.27 DirectoryRemoveRecFlag . . . . . .
6.28 DragAndDropAction . . . . . . . .
6.29 DragAndDropMode . . . . . . . . .
6.30 ExportOptions . . . . . . . . . . . .
6.31 FaultToleranceState . . . . . . . . .
6.32 FileSeekType . . . . . . . . . . . . .
6.33 FileStatus . . . . . . . . . . . . . .
6.34 FirmwareType . . . . . . . . . . . .
6.35 FramebufferPixelFormat . . . . . .
6.36 FsObjType . . . . . . . . . . . . . .
6.37 GraphicsControllerType . . . . . . .
6.38 GuestMonitorChangedEventType .
6.39 GuestMouseEventMode . . . . . . .
6.40 GuestSessionStatus . . . . . . . . .
6.41 GuestSessionWaitForFlag . . . . . .
6.42 GuestSessionWaitResult . . . . . .
6.43 GuestUserState . . . . . . . . . . .
6.44 HWVirtExPropertyType . . . . . . .
6.45 HostNetworkInterfaceMediumType
6.46 HostNetworkInterfaceStatus . . . .
6.47 HostNetworkInterfaceType . . . . .
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319
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321
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16
Contents
6.48
6.49
6.50
6.51
6.52
6.53
6.54
6.55
6.56
6.57
6.58
6.59
6.60
6.61
6.62
6.63
6.64
6.65
6.66
6.67
6.68
6.69
6.70
6.71
6.72
6.73
6.74
6.75
6.76
6.77
6.78
6.79
6.80
6.81
6.82
6.83
6.84
6.85
6.86
6.87
6.88
6.89
6.90
6.91
ImportOptions . . . . . . . . . . . .
KeyboardHIDType . . . . . . . . . .
LockType . . . . . . . . . . . . . . .
MachineState . . . . . . . . . . . .
MediumFormatCapabilities . . . . .
MediumState . . . . . . . . . . . .
MediumType . . . . . . . . . . . . .
MediumVariant . . . . . . . . . . .
MouseButtonState . . . . . . . . . .
NATAliasMode . . . . . . . . . . . .
NATProtocol . . . . . . . . . . . . .
NetworkAdapterPromiscModePolicy
NetworkAdapterType . . . . . . . .
NetworkAttachmentType . . . . . .
PathRenameFlag . . . . . . . . . . .
PointingHIDType . . . . . . . . . .
PortMode . . . . . . . . . . . . . .
ProcessCreateFlag . . . . . . . . . .
ProcessInputFlag . . . . . . . . . .
ProcessInputStatus . . . . . . . . .
ProcessOutputFlag . . . . . . . . .
ProcessPriority . . . . . . . . . . . .
ProcessStatus . . . . . . . . . . . .
ProcessWaitForFlag . . . . . . . . .
ProcessWaitResult . . . . . . . . . .
ProcessorFeature . . . . . . . . . .
Reason . . . . . . . . . . . . . . . .
Scope . . . . . . . . . . . . . . . . .
SessionState . . . . . . . . . . . . .
SessionType . . . . . . . . . . . . .
SettingsVersion . . . . . . . . . . .
StorageBus . . . . . . . . . . . . . .
StorageControllerType . . . . . . .
SymlinkReadFlag . . . . . . . . . .
SymlinkType . . . . . . . . . . . . .
TouchContactState . . . . . . . . .
USBControllerType . . . . . . . . .
USBDeviceFilterAction . . . . . . .
USBDeviceState . . . . . . . . . . .
VBoxEventType . . . . . . . . . . .
VFSFileType . . . . . . . . . . . . .
VFSType . . . . . . . . . . . . . . .
VirtualSystemDescriptionType . . .
VirtualSystemDescriptionValueType
7 Host-Guest Communication Manager
7.1
Virtual hardware implementation
7.2
Protocol specification . . . . . . .
7.2.1
Request header . . . . .
7.2.2
Connect . . . . . . . . .
7.2.3
Disconnect . . . . . . . .
7.2.4
Call32 and Call64 . . . .
7.2.5
Cancel . . . . . . . . . .
7.3
Guest software interface . . . . .
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17
Contents
7.4
7.3.1
The guest driver interface . . . . . . . . . . . . . . . . . . . . . . . . . . 354
7.3.2
Guest application interface . . . . . . . . . . . . . . . . . . . . . . . . . 356
HGCM Service Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
8 RDP Web Control
8.1
RDPWeb features . . . . . . . . . . . . . . . . .
8.2
RDPWeb reference . . . . . . . . . . . . . . . .
8.2.1
RDPWeb functions . . . . . . . . . . . .
8.2.2
Embedding RDPWeb in an HTML page
8.3
RDPWeb change log . . . . . . . . . . . . . . . .
8.3.1
Version 1.2.28 . . . . . . . . . . . . . .
8.3.2
Version 1.1.26 . . . . . . . . . . . . . .
8.3.3
Version 1.0.24 . . . . . . . . . . . . . .
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9 VirtualBox external authentication modules
358
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10 Using Java API
362
10.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362
10.2 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362
10.3 Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363
11 License information
364
12 Main API change log
12.1 Incompatible API changes with version 4.3
12.2 Incompatible API changes with version 4.2
12.3 Incompatible API changes with version 4.1
12.4 Incompatible API changes with version 4.0
12.5 Incompatible API changes with version 3.2
12.6 Incompatible API changes with version 3.1
12.7 Incompatible API changes with version 3.0
12.8 Incompatible API changes with version 2.2
12.9 Incompatible API changes with version 2.1
18
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375
1 Introduction
VirtualBox comes with comprehensive support for third-party developers. This Software Development Kit (SDK) contains all the documentation and interface files that are needed to write
code that interacts with VirtualBox.
1.1 Modularity: the building blocks of VirtualBox
VirtualBox is cleanly separated into several layers, which can be visualized like in the picture
below:
The orange area represents code that runs in kernel mode, the blue area represents userspace
code.
At the bottom of the stack resides the hypervisor – the core of the virtualization engine, controlling execution of the virtual machines and making sure they do not conflict with each other
or whatever the host computer is doing otherwise.
On top of the hypervisor, additional internal modules provide extra functionality. For example,
the RDP server, which can deliver the graphical output of a VM remotely to an RDP client, is a
separate module that is only loosely tacked into the virtual graphics device. Live Migration and
Resource Monitor are additional modules currently in the process of being added to VirtualBox.
What is primarily of interest for purposes of the SDK is the API layer block that sits on top of
all the previously mentioned blocks. This API, which we call the “Main API”, exposes the entire
feature set of the virtualization engine below. It is completely documented in this SDK Reference
– see chapter 5, Classes (interfaces), page 50 and chapter 6, Enumerations (enums), page 317
– and available to anyone who wishes to control VirtualBox programmatically. We chose the
name “Main API” to differentiate it from other programming interfaces of VirtualBox that may
be publicly accessible.
With the Main API, you can create, configure, start, stop and delete virtual machines, retrieve
performance statistics about running VMs, configure the VirtualBox installation in general, and
19
1 Introduction
more. In fact, internally, the front-end programs VirtualBox and VBoxManage use nothing but
this API as well – there are no hidden backdoors into the virtualization engine for our own frontends. This ensures the entire Main API is both well-documented and well-tested. (The same
applies to VBoxHeadless, which is not shown in the image.)
1.2 Two guises of the same “Main API”: the web service or
COM/XPCOM
There are several ways in which the Main API can be called by other code:
1. VirtualBox comes with a web service that maps nearly the entire Main API. The web service ships in a stand-alone executable (vboxwebsrv) that, when running, acts as an HTTP
server, accepts SOAP connections and processes them.
Since the entire web service API is publicly described in a web service description file (in
WSDL format), you can write client programs that call the web service in any language with
a toolkit that understands WSDL. These days, that includes most programming languages
that are available: Java, C++, .NET, PHP, Python, Perl and probably many more.
All of this is explained in detail in subsequent chapters of this book.
There are two ways in which you can write client code that uses the web service:
a) For Java as well as Python, the SDK contains easy-to-use classes that allow you to use
the web service in an object-oriented, straightforward manner. We shall refer to this
as the “object-oriented web service (OOWS)“.
The OO bindings for Java are described in chapter 10, Using Java API, page 362, those
for Python in chapter 2.1.2, The object-oriented web service for Python, page 27.
b) Alternatively, you can use the web service directly, without the object-oriented client
layer. We shall refer to this as the “raw web service”.
You will then have neither native object orientation nor full type safety, since web
services are neither object-oriented nor stateful. However, in this way, you can write
client code even in languages for which we do not ship object-oriented client code; all
you need is a programming language with a toolkit that can parse WSDL and generate
client wrapper code from it.
We describe this further in chapter 2.2, Using the raw web service with any language,
page 28, with samples for Java and Perl.
2. Internally, for portability and easier maintenance, the Main API is implemented using the
Component Object Model (COM), an interprocess mechanism for software components
originally introduced by Microsoft for Microsoft Windows. On a Windows host, VirtualBox
will use Microsoft COM; on other hosts where COM is not present, it ships with XPCOM,
a free software implementation of COM originally created by the Mozilla project for their
browsers.
So, if you are familiar with COM and the C++ programming language (or with any other
programming language that can handle COM/XPCOM objects, such as Java, Visual Basic or
C#), then you can use the COM/XPCOM API directly. VirtualBox comes with all necessary
files and documentation to build fully functional COM applications. For an introduction,
please see chapter 2.3, Using COM/XPCOM directly, page 34 below.
The VirtualBox front-ends (the graphical user interfaces as well as the command line),
which are all written in C++, use COM/XPCOM to call the Main API. Technically, the web
service is another front-end to this COM API, mapping almost all of it to SOAP clients.
If you wonder which way to choose, here are a few comparisons:
20
1 Introduction
Web service
Pro: Easy to use with Java and Python with the
object-oriented web service; extensive support
even with other languages (C++, .NET, PHP,
Perl and others)
Pro: Client can be on remote machine
Con: Significant overhead due to XML
marshalling over the wire for each method call
COM/XPCOM
Con: Usable from languages where
COM bridge available (most languages
on Windows platform, Python and C++
on other hosts)
Con: Client must be on the same host
where virtual machine is executed
Pro: Relatively low invocation overhead
In the following chapters, we will describe the different ways in which to program VirtualBox,
starting with the method that is easiest to use and then increase complexity as we go along.
1.3 About web services in general
Web services are a particular type of programming interface. Whereas, with “normal” programming, a program calls an application programming interface (API) defined by another program
or the operating system and both sides of the interface have to agree on the calling convention
and, in most cases, use the same programming language, web services use Internet standards
such as HTTP and XML to communicate.1
In order to successfully use a web service, a number of things are required – primarily, a web
service accepting connections; service descriptions; and then a client that connects to that web
service. The connections are governed by the SOAP standard, which describes how messages
are to be exchanged between a service and its clients; the service descriptions are governed by
WSDL.
In the case of VirtualBox, this translates into the following three components:
1. The VirtualBox web service (the “server”): this is the vboxwebsrv executable shipped with
VirtualBox. Once you start this executable (which acts as a HTTP server on a specific
TCP/IP port), clients can connect to the web service and thus control a VirtualBox installation.
2. VirtualBox also comes with WSDL files that describe the services provided by the web service. You can find these files in the sdk/bindings/webservice/ directory. These files are
understood by the web service toolkits that are shipped with most programming languages
and enable you to easily access a web service even if you don’t use our object-oriented
client layers. VirtualBox is shipped with pregenerated web service glue code for several
languages (Python, Perl, Java).
3. A client that connects to the web service in order to control the VirtualBox installation.
Unless you play with some of the samples shipped with VirtualBox, this needs to be written
by you.
1 In
some ways, web services promise to deliver the same thing as CORBA and DCOM did years ago. However, while
these previous technologies relied on specific binary protocols and thus proved to be difficult to use between diverging
platforms, web services circumvent these incompatibilities by using text-only standards like HTTP and XML. On the
downside (and, one could say, typical of things related to XML), a lot of standards are involved before a web service
can be implemented. Many of the standards invented around XML are used one way or another. As a result, web
services are slow and verbose, and the details can be incredibly messy. The relevant standards here are called SOAP
and WSDL, where SOAP describes the format of the messages that are exchanged (an XML document wrapped in
an HTTP header), and WSDL is an XML format that describes a complete API provided by a web service. WSDL in
turn uses XML Schema to describe types, which is not exactly terse either. However, as you will see from the samples
provided in this chapter, the VirtualBox web service shields you from these details and is easy to use.
21
1 Introduction
1.4 Running the web service
The web service ships in an stand-alone executable, vboxwebsrv, that, when running, acts as
a HTTP server, accepts SOAP connections and processes them – remotely or from the same
machine.
Note: The web service executable is not contained with the VirtualBox SDK, but instead
ships with the standard VirtualBox binary package for your specific platform. Since the
SDK contains only platform-independent text files and documentation, the binaries are
instead shipped with the platform-specific packages. For this reason the information
how to run it as a service is included in the VirtualBox documentation.
The vboxwebsrv program, which implements the web service, is a text-mode (console) program which, after being started, simply runs until it is interrupted with Ctrl-C or a kill command.
Once the web service is started, it acts as a front-end to the VirtualBox installation of
the user account that it is running under. In other words, if the web service is run under
the user account of user1, it will see and manipulate the virtual machines and other data
represented by the VirtualBox data of that user (for example, on a Linux machine, under
/home/user1/.config/VirtualBox; see the VirtualBox User Manual for details on where this
data is stored).
1.4.1 Command line options of vboxwebsrv
The web service supports the following command line options:
• --help (or -h): print a brief summary of command line options.
• --background (or -b): run the web service as a background daemon. This option is not
supported on Windows hosts.
• --host (or -H): This specifies the host to bind to and defaults to “localhost”.
• --port (or -p): This specifies which port to bind to on the host and defaults to 18083.
• --ssl (or -s): This enables SSL support.
• --keyfile (or -K): This specifies the file name containing the server private key and the
certificate. This is a mandatory parameter if SSL is enabled.
• --passwordfile (or -a): This specifies the file name containing the password for the
server private key. If unspecified or an empty string is specified this is interpreted as an
empty password (i.e. the private key is not protected by a password). If the file name
- is specified then then the password is read from the standard input stream, otherwise
from the specified file. The user is responsible for appropriate access rights to protect the
confidential password.
• --cacert (or -c): This specifies the file name containing the CA certificate appropriate for
the server certificate.
• --capath (or -C): This specifies the directory containing several CA certificates appropriate
for the server certificate.
• --dhfile (or -D): This specifies the file name containing the DH key. Alternatively it can
contain the number of bits of the DH key to generate. If left empty, RSA is used.
• --randfile (or -r): This specifies the file name containing the seed for the random number generator. If left empty, an operating system specific source of the seed.
22
1 Introduction
• --timeout (or -t): This specifies the session timeout, in seconds, and defaults to 300 (five
minutes). A web service client that has logged on but makes no calls to the web service
will automatically be disconnected after the number of seconds specified here, as if it had
called the IWebSessionManager::logoff() method provided by the web service itself.
It is normally vital that each web service client call this method, as the web service can
accumulate large amounts of memory when running, especially if a web service client does
not properly release managed object references. As a result, this timeout value should not
be set too high, especially on machines with a high load on the web service, or the web
service may eventually deny service.
• --check-interval (or -i): This specifies the interval in which the web service checks
for timed-out clients, in seconds, and defaults to 5. This normally does not need to be
changed.
• --threads (or -T): This specifies the maximum number or worker threads, and defaults
to 100. This normally does not need to be changed.
• --keepalive (or -k): This specifies the maximum number of requests which can be sent
in one web service connection, and defaults to 100. This normally does not need to be
changed.
• --authentication (or -A): This specifies the desired web service authentication method.
If the parameter is not specified or the empty string is specified it does not change the
authentication method, otherwise it is set to the specified value. Using this parameter is a
good measure against accidental misconfiguration, as the web service ensures periodically
that it isn’t changed.
• --verbose (or -v): Normally, the web service outputs only brief messages to the console
each time a request is served. With this option, the web service prints much more detailed data about every request and the COM methods that those requests are mapped to
internally, which can be useful for debugging client programs.
• --pidfile (or -P): Name of the PID file which is created when the daemon was started.
• --logfile (or -F) <file>: If this is specified, the web service not only prints its output
to the console, but also writes it to the specified file. The file is created if it does not exist;
if it does exist, new output is appended to it. This is useful if you run the web service
unattended and need to debug problems after they have occurred.
• --logrotate (or -R): Number of old log files to keep, defaults to 10. Log rotation is
disabled if set to 0.
• --logsize (or -S): Maximum size of log file in bytes, defaults to 100MB. Log rotation is
triggered if the file grows beyond this limit.
• --loginterval (or -I): Maximum time interval to be put in a log file before rotation is
triggered, in seconds, and defaults to one day.
1.4.2 Authenticating at web service logon
As opposed to the COM/XPCOM variant of the Main API, a client that wants to use the web service must first log on by calling the IWebsessionManager::logon() API (see chapter 5.146.3,
logon, page 316) that is specific to the web service. Logon is necessary for the web service to be
stateful; internally, it maintains a session for each client that connects to it.
The IWebsessionManager::logon() API takes a user name and a password as arguments,
which the web service then passes to a customizable authentication plugin that performs the
actual authentication.
23
1 Introduction
For testing purposes, it is recommended that you first disable authentication with this command:
VBoxManage setproperty websrvauthlibrary null
Warning: This will cause all logons to succeed, regardless of user name or password.
This should of course not be used in a production environment.
Generally, the mechanism by which clients are authenticated is configurable by way of the
VBoxManage command:
VBoxManage setproperty websrvauthlibrary default|null|<library>
This way you can specify any shared object/dynamic link module that conforms with the
specifications for VirtualBox external authentication modules as laid out in section VRDE authentication of the VirtualBox User Manual; the web service uses the same kind of modules as
the VirtualBox VRDE server. For technical details on VirtualBox external authentication modules
see chapter 9, VirtualBox external authentication modules, page 360
By default, after installation, the web service uses the VBoxAuth module that ships with
VirtualBox. This module uses PAM on Linux hosts to authenticate users. Any valid username/password combination is accepted, it does not have to be the username and password
of the user running the web service daemon. Unless vboxwebsrv runs as root, PAM authentication can fail, because sometimes the file /etc/shadow, which is used by PAM, is not readable. On most Linux distribution PAM uses a suid root helper internally, so make sure you test
this before deploying it. One can override this behavior by setting the environment variable
VBOX_PAM_ALLOW_INACTIVE which will suppress failures when unable to read the shadow password file. Please use this variable carefully, and only if you fully understand what you’re doing.
24
2 Environment-specific notes
The Main API described in chapter 5, Classes (interfaces), page 50 and chapter 6, Enumerations
(enums), page 317 is mostly identical in all the supported programming environments which
have been briefly mentioned in the introduction of this book. As a result, the Main API’s general
concepts described in chapter 3, Basic VirtualBox concepts; some examples, page 45 are the same
whether you use the object-oriented web service (OOWS) for JAX-WS or a raw web service
connection via, say, Perl, or whether you use C++ COM bindings.
Some things are different depending on your environment, however. These differences are
explained in this chapter.
2.1 Using the object-oriented web service (OOWS)
As explained in chapter 1.2, Two guises of the same “Main API”: the web service or COM/XPCOM,
page 20, VirtualBox ships with client-side libraries for Java, Python and PHP that allow you to use
the VirtualBox web service in an intuitive, object-oriented way. These libraries shield you from
the client-side complications of managed object references and other implementation details that
come with the VirtualBox web service. (If you are interested in these complications, have a look
at chapter 2.2, Using the raw web service with any language, page 28).
We recommend that you start your experiments with the VirtualBox web service by using our
object-oriented client libraries for JAX-WS, a web service toolkit for Java, which enables you to
write code to interact with VirtualBox in the simplest manner possible.
As “interfaces”, “attributes” and “methods” are COM concepts, please read the documentation
in chapter 5, Classes (interfaces), page 50 and chapter 6, Enumerations (enums), page 317 with
the following notes in mind.
The OOWS bindings attempt to map the Main API as closely as possible to the Java, Python
and PHP languages. In other words, objects are objects, interfaces become classes, and you can
call methods on objects as you would on local objects.
The main difference remains with attributes: to read an attribute, call a “getXXX” method,
with “XXX” being the attribute name with a capitalized first letter. So when the Main API Reference says that IMachine has a “name” attribute (see IMachine::name), call getName() on an
IMachine object to obtain a machine’s name. Unless the attribute is marked as read-only in the
documentation, there will also be a corresponding “set” method.
2.1.1 The object-oriented web service for JAX-WS
JAX-WS is a powerful toolkit by Sun Microsystems to build both server and client code with Java.
It is part of Java 6 (JDK 1.6), but can also be obtained separately for Java 5 (JDK 1.5). The
VirtualBox SDK comes with precompiled OOWS bindings working with both Java 5 and 6.
The following sections explain how to get the JAX-WS sample code running and explain a few
common practices when using the JAX-WS object-oriented web service.
2.1.1.1 Preparations
Since JAX-WS is already integrated into Java 6, no additional preparations are needed for Java
6.
If you are using Java 5 (JDK 1.5.x), you will first need to download and install an external
JAX-WS implementation, as Java 5 does not support JAX-WS out of the box; for example, you can
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2 Environment-specific notes
download one from here: https://jax-ws.dev.java.net/2.1.4/JAXWS2.1.4-20080502.
jar. Then perform the installation (java -jar JAXWS2.1.4-20080502.jar).
2.1.1.2 Getting started: running the sample code
To run the OOWS for JAX-WS samples that we ship with the SDK, perform the following steps:
1. Open a terminal and change to the directory where the JAX-WS samples reside.1 Examine
the header of Makefile to see if the supplied variables (Java compiler, Java executable)
and a few other details match your system settings.
2. To start the VirtualBox web service, open a second terminal and change to the directory
where the VirtualBox executables are located. Then type:
./vboxwebsrv -v
The web service now waits for connections and will run until you press Ctrl+C in this
second terminal. The -v argument causes it to log all connections to the terminal. (See
chapter 1.4, Running the web service, page 22 for details on how to run the web service.)
3. Back in the first terminal and still in the samples directory, to start a simple client example
just type:
make run16
if you’re on a Java 6 system; on a Java 5 system, run make run15 instead.
This should work on all Unix-like systems such as Linux and Solaris. For Windows systems,
use commands similar to what is used in the Makefile.
This will compile the clienttest.java code on the first call and then execute the resulting
clienttest class to show the locally installed VMs (see below).
The clienttest sample imitates a few typical command line tasks that VBoxManage,
VirtualBox’s regular command-line front-end, would provide (see the VirtualBox User Manual
for details). In particular, you can run:
• java clienttest show vms: show the virtual machines that are registered locally.
• java clienttest list hostinfo:
VirtualBox installation runs on.
show various information about the host this
• java clienttest startvm <vmname|uuid>: start the given virtual machine.
The clienttest.java sample code illustrates common basic practices how to use the
VirtualBox OOWS for JAX-WS, which we will explain in more detail in the following chapters.
2.1.1.3 Logging on to the web service
Before a web service client can do anything useful, two objects need to be created, as can be
seen in the clienttest constructor:
1. An instance of IWebsessionManager, which is an interface provided by the web service to
manage “web sessions” – that is, stateful connections to the web service with persistent
objects upon which methods can be invoked.
In the OOWS for JAX-WS, the IWebsessionManager class must be constructed explicitly, and
a URL must be provided in the constructor that specifies where the web service (the server)
awaits connections. The code in clienttest.java connects to “http://localhost:18083/“,
which is the default.
The port number, by default 18083, must match the port number given to the vboxwebsrv
command line; see chapter 1.4.1, Command line options of vboxwebsrv, page 22.
1 In sdk/bindings/glue/java/.
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2 Environment-specific notes
2. After that, the code calls IWebsessionManager::logon(), which is the first call that actually
communicates with the server. This authenticates the client with the web service and
returns an instance of IVirtualBox, the most fundamental interface of the VirtualBox web
service, from which all other functionality can be derived.
If logon doesn’t work, please take another look at chapter 1.4.2, Authenticating at web
service logon, page 23.
2.1.1.4 Object management
The current OOWS for JAX-WS has certain memory management related limitations. When
you no longer need an object, call its IManagedObjectRef::release() method explicitly, which
frees appropriate managed reference, as is required by the raw web service; see chapter 2.2.3.3,
Managed object references, page 32 for details. This limitation may be reconsidered in a future
version of the VirtualBox SDK.
2.1.2 The object-oriented web service for Python
VirtualBox comes with two flavors of a Python API: one for web service, discussed here, and
one for the COM/XPCOM API discussed in chapter 2.3.1, Python COM API, page 34. The client
code is mostly similar, except for the initialization part, so it is up to the application developer
to choose the appropriate technology. Moreover, a common Python glue layer exists, abstracting
out concrete platform access details, see chapter 2.3.2, Common Python bindings layer, page 34.
As indicated in chapter 1.2, Two guises of the same “Main API”: the web service or COM/XPCOM,
page 20, the COM/XPCOM API gives better performance without the SOAP overhead, and does
not require a web server to be running. On the other hand, the COM/XPCOM Python API requires
a suitable Python bridge for your Python installation (VirtualBox ships the most important ones
for each platform2 ). On Windows, you can use the Main API from Python if the Win32 extensions
package for Python3 is installed. Version of Python Win32 extensions earlier than 2.16 are known
to have bugs, leading to issues with VirtualBox Python bindings, and also some early builds of
Python 2.5 for Windows have issues with reporting platform name on some Windows versions,
so please make sure to use latest available Python and Win32 extensions.
The VirtualBox OOWS for Python relies on the Python ZSI SOAP implementation (see http:
//pywebsvcs.sourceforge.net/zsi.html), which you will need to install locally before trying
the examples. Most Linux distributions come with package for ZSI, such as python-zsi in
Ubuntu.
To get started, open a terminal and change to the bindings/glue/python/sample directory, which contains an example of a simple interactive shell able to control a VirtualBox instance. The shell is written using the API layer, thereby hiding different implementation details, so it is actually an example of code share among XPCOM, MSCOM and web services.
If you are interested in how to interact with the web services layer directly, have a look at
install/vboxapi/__init__.py which contains the glue layer for all target platforms (i.e. XPCOM, MSCOM and web services).
To start the shell, perform the following commands:
/opt/VirtualBox/vboxwebsrv -t 0
# start web service with object autocollection disabled
export VBOX_PROGRAM_PATH=/opt/VirtualBox
# your VirtualBox installation directory
export VBOX_SDK_PATH=/home/youruser/vbox-sdk
# where you’ve extracted the SDK
./vboxshell.py -w
2 On
On Mac OS X only the Python versions bundled with the OS are officially supported. This means Python 2.3 for
10.4, Python 2.5 for 10.5 and Python 2.5 and 2.6 for 10.6.
3 See http://sourceforge.net/project/showfiles.php?group_id=78018.
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2 Environment-specific notes
See chapter 4, The VirtualBox shell, page 48 for more details on the shell’s functionality. For you,
as a VirtualBox application developer, the vboxshell sample could be interesting as an example of
how to write code targeting both local and remote cases (COM/XPCOM and SOAP). The common
part of the shell is the same – the only difference is how it interacts with the invocation layer.
You can use the connect shell command to connect to remote VirtualBox servers; in this case
you can skip starting the local web server.
2.1.3 The object-oriented web service for PHP
VirtualBox also comes with object-oriented web service (OOWS) wrappers for PHP5. These
wrappers rely on the PHP SOAP Extension4 , which can be installed by configuring PHP with
--enable-soap.
2.2 Using the raw web service with any language
The following examples show you how to use the raw web service, without the object-oriented
client-side code that was described in the previous chapter.
Generally, when reading the documentation in chapter 5, Classes (interfaces), page 50 and
chapter 6, Enumerations (enums), page 317, due to the limitations of SOAP and WSDL lined out
in chapter 2.2.3.1, Fundamental conventions, page 30, please have the following notes in mind:
1. Any COM method call becomes a plain function call in the raw web service, with the
object as an additional first parameter (before the “real” parameters listed in the documentation). So when the documentation says that the IVirtualBox interface supports
the createMachine() method (see IVirtualBox::createMachine()), the web service operation is IVirtualBox_createMachine(...), and a managed object reference to an
IVirtualBox object must be passed as the first argument.
2. For attributes in interfaces, there will be at least one “get” function; there will also be a
“set” function, unless the attribute is “readonly”. The attribute name will be appended to
the “get” or “set” prefix, with a capitalized first letter. So, the “version” readonly attribute of
the IVirtualBox interface can be retrieved by calling IVirtualBox_getVersion(vbox),
with vbox being the VirtualBox object.
3. Whenever the API documentation says that a method (or an attribute getter) returns an
object, it will returned a managed object reference in the web service instead. As said
above, managed object references should be released if the web service client does not log
off again immediately!
2.2.1 Raw web service example for Java with Axis
Axis is an older web service toolkit created by the Apache foundation. If your distribution does
not have it installed, you can get a binary from http://www.apache.org. The following examples assume that you have Axis 1.4 installed.
The VirtualBox SDK ships with an example for Axis that, again, is called clienttest.java
and that imitates a few of the commands of VBoxManage over the wire.
Then perform the following steps:
1. Create a working directory somewhere. Under your VirtualBox installation directory, find
the sdk/webservice/samples/java/axis/ directory and copy the file clienttest.java
to your working directory.
2. Open a terminal in your working directory. Execute the following command:
4 See http://www.php.net/soap.
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2 Environment-specific notes
java org.apache.axis.wsdl.WSDL2Java /path/to/vboxwebService.wsdl
The vboxwebService.wsdl file should be located in the sdk/webservice/ directory.
If this fails, your Apache Axis may not be located on your system classpath, and you may
have to adjust the CLASSPATH environment variable. Something like this:
export CLASSPATH="/path-to-axis-1_4/lib/*":$CLASSPATH
Use the directory where the Axis JAR files are located. Mind the quotes so that your shell
passes the “*“ character to the java executable without expanding. Alternatively, add a
corresponding -classpath argument to the “java” call above.
If the command executes successfully, you should see an “org” directory with subdirectories containing Java source files in your working directory. These classes represent the
interfaces that the VirtualBox web service offers, as described by the WSDL file.
This is the bit that makes using web services so attractive to client developers: if a language’s toolkit understands WSDL, it can generate large amounts of support code automatically. Clients can then easily use this support code and can be done with just a few
lines of code.
3. Next, compile the clienttest.java source:
javac clienttest.java
This should yield a “clienttest.class” file.
4. To start the VirtualBox web service, open a second terminal and change to the directory
where the VirtualBox executables are located. Then type:
./vboxwebsrv -v
The web service now waits for connections and will run until you press Ctrl+C in this
second terminal. The -v argument causes it to log all connections to the terminal. (See
chapter 1.4, Running the web service, page 22 for details on how to run the web service.)
5. Back in the original terminal where you compiled the Java source, run the resulting binary,
which will then connect to the web service:
java clienttest
The client sample will connect to the web service (on localhost, but the code could be
changed to connect remotely if the web service was running on a different machine) and
make a number of method calls. It will output the version number of your VirtualBox
installation and a list of all virtual machines that are currently registered (with a bit of
seemingly random data, which will be explained later).
2.2.2 Raw web service example for Perl
We also ship a small sample for Perl. It uses the SOAP::Lite perl module to communicate with
the VirtualBox web service.
The sdk/bindings/webservice/perl/lib/ directory contains a pre-generated Perl module
that allows for communicating with the web service from Perl. You can generate such a module
yourself using the “stubmaker” tool that comes with SOAP::Lite, but since that tool is slow as well
as sometimes unreliable, we are shipping a working module with the SDK for your convenience.
Perform the following steps:
1. If SOAP::Lite is not yet installed on your system, you will need to install the package
first. On Debian-based systems, the package is called libsoap-lite-perl; on Gentoo, it’s
dev-perl/SOAP-Lite.
2. Open a terminal in the sdk/bindings/webservice/perl/samples/ directory.
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2 Environment-specific notes
3. To start the VirtualBox web service, open a second terminal and change to the directory
where the VirtualBox executables are located. Then type:
./vboxwebsrv -v
The web service now waits for connections and will run until you press Ctrl+C in this
second terminal. The -v argument causes it to log all connections to the terminal. (See
chapter 1.4, Running the web service, page 22 for details on how to run the web service.)
4. In the first terminal with the Perl sample, run the clienttest.pl script:
perl -I ../lib clienttest.pl
2.2.3 Programming considerations for the raw web service
If you use the raw web service, you need to keep a number of things in mind, or you will sooner
or later run into issues that are not immediately obvious. By contrast, the object-oriented clientside libraries described in chapter 2.1, Using the object-oriented web service (OOWS), page 25 take
care of these things automatically and thus greatly simplify using the web service.
2.2.3.1 Fundamental conventions
If you are familiar with other web services, you may find the VirtualBox web service to behave
a bit differently to accommodate for the fact that VirtualBox web service more or less maps the
VirtualBox Main COM API. The following main differences had to be taken care of:
• Web services, as expressed by WSDL, are not object-oriented. Even worse, they are normally stateless (or, in web services terminology, “loosely coupled”). Web service operations
are entirely procedural, and one cannot normally make assumptions about the state of a
web service between function calls.
In particular, this normally means that you cannot work on objects in one method call that
were created by another call.
• By contrast, the VirtualBox Main API, being expressed in COM, is object-oriented and works
entirely on objects, which are grouped into public interfaces, which in turn have attributes
and methods associated with them.
For the VirtualBox web service, this results in three fundamental conventions:
1. All function names in the VirtualBox web service consist of an interface name and a
method name, joined together by an underscore. This is because there are only functions
(“operations”) in WSDL, but no classes, interfaces, or methods.
In addition, all calls to the VirtualBox web service (except for logon, see below) take a
managed object reference as the first argument, representing the object upon which the
underlying method is invoked. (Managed object references are explained in detail below;
see chapter 2.2.3.3, Managed object references, page 32.)
So, when one would normally code, in the pseudo-code of an object-oriented language, to
invoke a method upon an object:
IMachine machine;
result = machine.getName();
In the VirtualBox web service, this looks something like this (again, pseudo-code):
IMachineRef machine;
result = IMachine_getName(machine);
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2 Environment-specific notes
2. To make the web service stateful, and objects persistent between method calls, the
VirtualBox web service introduces a session manager (by way of the IWebsessionManager
interface), which manages object references. Any client wishing to interact with the web
service must first log on to the session manager and in turn receives a managed object reference to an object that supports the IVirtualBox interface (the basic interface in the Main
API).
In other words, as opposed to other web services, the VirtualBox web service is both objectoriented and stateful.
2.2.3.2 Example: A typical web service client session
A typical short web service session to retrieve the version number of the VirtualBox web service
(to be precise, the underlying Main API version number) looks like this:
1. A client logs on to the web service by calling IWebsessionManager::logon() with a valid
user name and password. See chapter 1.4.2, Authenticating at web service logon, page 23
for details about how authentication works.
2. On the server side, vboxwebsrv creates a session, which persists until the client calls
IWebsessionManager::logoff() or the session times out after a configurable period of inactivity (see chapter 1.4.1, Command line options of vboxwebsrv, page 22).
For the new session, the web service creates an instance of IVirtualBox. This interface is the
most central one in the Main API and allows access to all other interfaces, either through
attributes or method calls. For example, IVirtualBox contains a list of all virtual machines
that are currently registered (as they would be listed on the left side of the VirtualBox main
program).
The web service then creates a managed object reference for this instance of IVirtualBox
and returns it to the calling client, which receives it as the return value of the logon call.
Something like this:
string oVirtualBox;
oVirtualBox = webservice.IWebsessionManager_logon("user", "pass");
(The managed object reference “oVirtualBox” is just a string consisting of digits and dashes.
However, it is a string with a meaning and will be checked by the web service. For details,
see below. As hinted above, IWebsessionManager::logon() is the only operation provided
by the web service which does not take a managed object reference as the first argument!)
3. The VirtualBox Main API documentation says that the IVirtualBox interface has a version
attribute, which is a string. For each attribute, there is a “get” and a “set” method in
COM, which maps to according operations in the web service. So, to retrieve the “version”
attribute of this IVirtualBox object, the web service client does this:
string version;
version = webservice.IVirtualBox_getVersion(oVirtualBox);
print version;
And it will print “4.3.24”.
4. The web service client calls IWebsessionManager::logoff() with the VirtualBox managed
object reference. This will clean up all allocated resources.
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2 Environment-specific notes
2.2.3.3 Managed object references
To a web service client, a managed object reference looks like a string: two 64-bit hex numbers
separated by a dash. This string, however, represents a COM object that “lives” in the web service
process. The two 64-bit numbers encoded in the managed object reference represent a session
ID (which is the same for all objects in the same web service session, i.e. for all objects after one
logon) and a unique object ID within that session.
Managed object references are created in two situations:
1. When a client logs on, by calling IWebsessionManager::logon().
Upon logon, the websession manager creates one instance of IVirtualBox and another
object of ISession representing the web service session. This can be retrieved using
IWebsessionManager::getSessionObject().
(Technically, there is always only one IVirtualBox object, which is shared between all sessions and clients, as it is a COM singleton. However, each session receives its own managed
object reference to it. The ISession object, however, is created and destroyed for each session.)
2. Whenever a web service clients invokes an operation whose COM implementation creates
COM objects.
For example, IVirtualBox::createMachine() creates a new instance of IMachine; the COM
object returned by the COM method call is then wrapped into a managed object reference
by the web server, and this reference is returned to the web service client.
Internally, in the web service process, each managed object reference is simply a small data
structure, containing a COM pointer to the “real” COM object, the web session ID and the object
ID. This structure is allocated on creation and stored efficiently in hashes, so that the web service
can look up the COM object quickly whenever a web service client wishes to make a method call.
The random session ID also ensures that one web service client cannot intercept the objects of
another.
Managed object references are not destroyed automatically and must be released by explicitly
calling IManagedObjectRef::release(). This is important, as otherwise hundreds or thousands of
managed object references (and corresponding COM objects, which can consume much more
memory!) can pile up in the web service process and eventually cause it to deny service.
To reiterate: The underlying COM object, which the reference points to, is only freed if the
managed object reference is released. It is therefore vital that web service clients properly clean
up after the managed object references that are returned to them.
When a web service client calls IWebsessionManager::logoff(), all managed object references
created during the session are automatically freed. For short-lived sessions that do not create a
lot of objects, logging off may therefore be sufficient, although it is certainly not “best practice”.
2.2.3.4 Some more detail about web service operation
SOAP messages Whenever a client makes a call to a web service, this involves a complicated
procedure internally. These calls are remote procedure calls. Each such procedure call typically
consists of two “message” being passed, where each message is a plain-text HTTP request with a
standard HTTP header and a special XML document following. This XML document encodes the
name of the procedure to call and the argument names and values passed to it.
To give you an idea of what such a message looks like, assuming that a web service provides
a procedure called “SayHello”, which takes a string “name” as an argument and returns “Hello”
with a space and that name appended, the request message could look like this:
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
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2 Environment-specific notes
xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:test="http://test/">
<SOAP-ENV:Body>
<test:SayHello>
<name>Peter</name>
</test:SayHello>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
A similar message – the “response” message – would be sent back from the web service to the
client, containing the return value “Hello Peter”.
Most programming languages provide automatic support to generate such messages whenever
code in that programming language makes such a request. In other words, these programming
languages allow for writing something like this (in pseudo-C++ code):
webServiceClass service("localhost", 18083); // server and port
string result = service.SayHello("Peter"); // invoke remote procedure
and would, for these two pseudo-lines, automatically perform these steps:
1. prepare a connection to a web service running on port 18083 of “localhost”;
2. for the SayHello() function of the web service, generate a SOAP message like in the above
example by encoding all arguments of the remote procedure call (which could involve all
kinds of type conversions and complex marshalling for arrays and structures);
3. connect to the web service via HTTP and send that message;
4. wait for the web service to send a response message;
5. decode that response message and put the return value of the remote procedure into the
“result” variable.
Service descriptions in WSDL In the above explanations about SOAP, it was left open how
the programming language learns about how to translate function calls in its own syntax into
proper SOAP messages. In other words, the programming language needs to know what operations the web service supports and what types of arguments are required for the operation’s data
in order to be able to properly serialize and deserialize the data to and from the web service.
For example, if a web service operation expects a number in “double” floating point format for a
particular parameter, the programming language cannot send to it a string instead.
For this, the Web Service Definition Language (WSDL) was invented, another XML substandard
that describes exactly what operations the web service supports and, for each operation, which
parameters and types are needed with each request and response message. WSDL descriptions
can be incredibly verbose, and one of the few good things that can be said about this standard is
that it is indeed supported by most programming languages.
So, if it is said that a programming language “supports” web services, this typically means
that a programming language has support for parsing WSDL files and somehow integrating the
remote procedure calls into the native language syntax – for example, like in the Java sample
shown in chapter 2.2.1, Raw web service example for Java with Axis, page 28.
For details about how programming languages support web services, please refer to the documentation that comes with the individual languages. Here are a few pointers:
1. For C++, among many others, the gSOAP toolkit is a good option. Parts of gSOAP are also
used in VirtualBox to implement the VirtualBox web service.
2. For Java, there are several implementations already described in this document (see chapter 2.1.1, The object-oriented web service for JAX-WS, page 25 and chapter 2.2.1, Raw web
service example for Java with Axis, page 28).
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2 Environment-specific notes
3. Perl supports WSDL via the SOAP::Lite package. This in turn comes with a tool called
stubmaker.pl that allows you to turn any WSDL file into a Perl package that you can
import. (You can also import any WSDL file “live” by having it parsed every time the script
runs, but that can take a while.) You can then code (again, assuming the above example):
my $result = servicename->sayHello("Peter");
A sample that uses SOAP::Lite was described in chapter 2.2.2, Raw web service example for
Perl, page 29.
2.3 Using COM/XPCOM directly
If you do not require remote procedure calls such as those offered by the VirtualBox web service, and if you know Python or C++ as well as COM, you might find it preferable to program
VirtualBox’s Main API directly via COM.
COM stands for “Component Object Model” and is a standard originally introduced by Microsoft in the 1990s for Microsoft Windows. It allows for organizing software in an objectoriented way and across processes; code in one process may access objects that live in another
process.
COM has several advantages: it is language-neutral, meaning that even though all of
VirtualBox is internally written in C++, programs written in other languages could communicate
with it. COM also cleanly separates interface from implementation, so that external programs
need not know anything about the messy and complicated details of VirtualBox internals.
On a Windows host, all parts of VirtualBox will use the COM functionality that is native to
Windows. On other hosts (including Linux), VirtualBox comes with a built-in implementation
of XPCOM, as originally created by the Mozilla project, which we have enhanced to support
interprocess communication on a level comparable to Microsoft COM. Internally, VirtualBox has
an abstraction layer that allows the same VirtualBox code to work both with native COM as well
as our XPCOM implementation.
2.3.1 Python COM API
On Windows, Python scripts can use COM and VirtualBox interfaces to control almost all aspects
of virtual machine execution. As an example, use the following commands to instantiate the
VirtualBox object and start a VM:
vbox = win32com.client.Dispatch("VirtualBox.VirtualBox")
session = win32com.client.Dispatch("VirtualBox.Session")
mach = vbox.findMachine("uuid or name of machine to start")
progress = mach.launchVMProcess(session, "gui", "")
progress.waitForCompletion(-1)
Also, see /bindings/glue/python/samples/vboxshell.py for more advanced usage scenarious. However, unless you have specific requirements, we strongly recommend to use the generic
glue layer described in the next section to access MS COM objects.
2.3.2 Common Python bindings layer
As different wrappers ultimately provide access to the same underlying API, and to simplify
porting and development of Python application using the VirtualBox Main API, we developed
a common glue layer that abstracts out most platform-specific details from the application and
allows the developer to focus on application logic. The VirtualBox installer automatically sets up
this glue layer for the system default Python install. See below for details on how to set up the
glue layer if you want to use a different Python installation.
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2 Environment-specific notes
In this layer, the class VirtualBoxManager hides most platform-specific details. It can be used
to access both the local (COM) and the web service based API. The following code can be used
by an application to use the glue layer.
# This code assumes vboxapi.py from VirtualBox distribution
# being in PYTHONPATH, or installed system-wide
from vboxapi import VirtualBoxManager
# This code initializes VirtualBox manager with default style
# and parameters
virtualBoxManager = VirtualBoxManager(None, None)
# Alternatively, one can be more verbose, and initialize
# glue with web service backend, and provide authentication
# information
virtualBoxManager = VirtualBoxManager("WEBSERVICE",
{’url’:’http://myhost.com::18083/’,
’user’:’me’,
’password’:’secret’})
We supply the VirtualBoxManager constructor with 2 arguments: style and parameters. Style
defines which bindings style to use (could be “MSCOM”, “XPCOM” or “WEBSERVICE”), and if set
to None defaults to usable platform bindings (MS COM on Windows, XPCOM on other platforms).
The second argument defines parameters, passed to the platform-specific module, as we do in
the second example, where we pass username and password to be used to authenticate against
the web service.
After obtaining the VirtualBoxManager instance, one can perform operations on the IVirtualBox class. For example, the following code will a start virtual machine by name or ID:
from vboxapi import VirtualBoxManager
mgr = VirtualBoxManager(None, None)
vbox = mgr.vbox
name = "Linux"
mach = vbox.findMachine(name)
session = mgr.mgr.getSessionObject(vbox)
progress = mach.launchVMProcess(session, "gui", "")
progress.waitForCompletion(-1)
mgr.closeMachineSession(session)
Following code will print all registered machines and their log folders
from vboxapi import VirtualBoxManager
mgr = VirtualBoxManager(None, None)
vbox = mgr.vbox
for m in mgr.getArray(vbox, ’machines’):
print "Machine ’%s’ logs in ’%s’" %(m.name, m.logFolder)
Code above demonstrates cross-platform access to array properties (certain limitations prevent
one from using vbox.machines to access a list of available virtual machines in case of XPCOM),
and a mechanism of uniform session creation and closing (mgr.mgr.getSessionObject()).
In case you want to use the glue layer with a different Python installation, use these steps in a
shell to add the necessary files:
# cd VBOX_INSTALL_PATH/sdk/installer
# PYTHON vboxapisetup.py install
2.3.3 C++ COM API
C++ is the language that VirtualBox itself is written in, so C++ is the most direct way to use
the Main API – but it is not necessarily the easiest, as using COM and XPCOM has its own set of
complications.
35
2 Environment-specific notes
VirtualBox ships with sample programs that demonstrate how to use the Main API to implement a number of tasks on your host platform. These samples can be found in the
/bindings/xpcom/samples directory for Linux, Mac OS X and Solaris and /bindings/mscom/samples
for Windows. The two samples are actually different, because the one for Windows uses native
COM, whereas the other uses our XPCOM implementation, as described above.
Since COM and XPCOM are conceptually very similar but vary in the implementation details,
we have created a “glue” layer that shields COM client code from these differences. All VirtualBox
uses is this glue layer, so the same code written once works on both Windows hosts (with native
COM) as well as on other hosts (with our XPCOM implementation). It is recommended to always
use this glue code instead of using the COM and XPCOM APIs directly, as it is very easy to make
your code completely independent from the platform it is running on.
In order to encapsulate platform differences between Microsoft COM and XPCOM, the following items should be kept in mind when using the glue layer:
1. Attribute getters and setters. COM has the notion of “attributes” in interfaces, which
roughly compare to C++ member variables in classes. The difference is that for each
attribute declared in an interface, COM automatically provides a “get” method to return
the attribute’s value. Unless the attribute has been marked as “readonly”, a “set” attribute
is also provided.
To illustrate, the IVirtualBox interface has a “version” attribute, which is read-only and of
the “wstring” type (the standard string type in COM). As a result, you can call the “get”
method for this attribute to retrieve the version number of VirtualBox.
Unfortunately, the implementation differs between COM and XPCOM. Microsoft COM
names the “get” method like this: get_Attribute(), whereas XPCOM uses this syntax: GetAttribute() (and accordingly for “set” methods). To hide these differences, the
VirtualBox glue code provides the COMGETTER(attrib) and COMSETTER(attrib) macros.
So, COMGETTER(version)() (note, two pairs of brackets) expands to get_Version() on
Windows and GetVersion() on other platforms.
2. Unicode conversions. While the rest of the modern world has pretty much settled on
encoding strings in UTF-8, COM, unfortunately, uses UCS-16 encoding. This requires a lot
of conversions, in particular between the VirtualBox Main API and the Qt GUI, which, like
the rest of Qt, likes to use UTF-8.
To facilitate these conversions, VirtualBox provides the com::Bstr and com::Utf8Str
classes, which support all kinds of conversions back and forth.
3. COM autopointers. Possibly the greatest pain of using COM – reference counting – is
alleviated by the ComPtr<> template provided by the ptr.h file in the glue layer.
2.3.4 Event queue processing
Both VirtualBox client programs and frontends should periodically perform processing of the
main event queue, and do that on the application’s main thread. In case of a typical GUI
Windows/Mac OS application this happens automatically in the GUI’s dispatch loop. However,
for CLI only application, the appropriate actions have to be taken. For C++ applications, the
VirtualBox SDK provided glue method
int EventQueue::processEventQueue(uint32_t cMsTimeout)
can be used for both blocking and non-blocking operations. For the Python bindings, a common
layer provides the method
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2 Environment-specific notes
VirtualBoxManager.waitForEvents(ms)
with similar semantics.
Things get somewhat more complicated for situations where an application using VirtualBox
cannot directly control the main event loop and the main event queue is separated from the event
queue of the programming librarly (for example in case of Qt on Unix platforms). In such a case,
the application developer is advised to use a platform/toolkit specific event injection mechanism
to force event queue checks either based on periodical timer events delivered to the main thread,
or by using custom platform messages to notify the main thread when events are available. See
the VBoxSDL and Qt (VirtualBox) frontends as examples.
2.3.5 Visual Basic and Visual Basic Script (VBS) on Windows hosts
On Windows hosts, one can control some of the VirtualBox Main API functionality from VBS
scripts, and pretty much everything from Visual Basic programs.5
VBS is scripting language available in any recent Windows environment. As an example, the
following VBS code will print VirtualBox version:
set vb = CreateObject("VirtualBox.VirtualBox")
Wscript.Echo "VirtualBox version " & vb.version
See bindings/mscom/vbs/sample/vboxinfo.vbs for the complete sample.
Visual Basic is a popular high level language capable of accessing COM objects. The following
VB code will iterate over all available virtual machines:
Dim vb As VirtualBox.IVirtualBox
vb = CreateObject("VirtualBox.VirtualBox")
machines = ""
For Each m In vb.Machines
m = m & " " & m.Name
Next
See bindings/mscom/vb/sample/vboxinfo.vb for the complete sample.
2.3.6 C binding to VirtualBox API
The VirtualBox API originally is designed as object oriented, using XPCOM or COM as the middleware, which translates natively to C++. This means that in order to use it from C there needs
to be some helper code to bridge the language differences and reduce the differences between
platforms.
2.3.6.1 Cross-platform C binding to VirtualBox API
Starting with version 4.3, VirtualBox offers a C binding which allows using the same C client
sources for all platforms, covering Windows, Linux, Mac OS X and Solaris. It is the preferred
way to write API clients, even though the old style is still available.
5 The
difference results from the way VBS treats COM safearrays, which are used to keep lists in the Main API. VBS
expects every array element to be a VARIANT, which is too strict a limitation for any high performance API. We may
lift this restriction for interface APIs in a future version, or alternatively provide conversion APIs.
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2 Environment-specific notes
2.3.6.2 Getting started
The following sections describe how to use the VirtualBox API in a C program. The
necessary files are included in the SDK, in the directories sdk/bindings/c/include and
sdk/bindings/c/glue.
As part of the SDK, a sample program tstCAPIGlue.c is provided in the directory
sdk/bindings/c/samples which demonstrates using the C binding to initialize the API, get
handles for VirtualBox and Session objects, make calls to list and start virtual machines, monitor
events, and uninitialize resources when done. The sample program is trying to illustrate all
relevant concepts, so it is a great source of detail information. Among many other generally
useful code sequences it contains a function which shows how to retrieve error details in C code
if they are available from the API call.
The sample program tstCAPIGlue can be built using the provided Makefile and can be run
without arguments.
It uses the VBoxCAPIGlue library (source code is in directory sdk/bindings/c/glue, to be
used in your API client code) to open the C binding layer during runtime, which is preferred to
other means as it isolates the code which locates the necessary dynamic library, using a known
working way which works on all platforms. If you encounter problems with this glue code
in VBoxCAPIGlue.c, let the VirtualBox developers know, rather than inventing incompatible
solutions.
The following sections document the important concepts needed to correctly use the C binding,
as it is vital for developing API client code which manages memory correctly, updates the reference counters correctly, avoiding crashes and memory leaks. Often API clients need to handle
events, so the C API specifics are also described below.
2.3.6.3 VirtualBox C API initialization
Just like in C++, the API and the underlying middleware needs to be initialized before it can
be used. The VBoxCAPI_v4_3.h header provides the interface to the C binding, but you can
alternatively and more conveniently also include VBoxCAPIGlue.h, as this avoids the VirtualBox
version dependent header file name and makes sure the global variable g_pVBoxFuncs contains
a pointer to the structure which contains the helper function pointers. Here’s how to initialize
the C API:
#include "VBoxCAPIGlue.h"
...
IVirtualBoxClient *vboxclient
IVirtualBox *vbox
ISession *session
HRESULT rc;
ULONG revision;
= NULL;
= NULL;
= NULL;
/*
* VBoxCGlueInit() loads the necessary dynamic library, handles errors
* (producing an error message hinting what went wrong) and gives you
* the pointer to the function table (g_pVBoxFuncs).
*
* Once you get the function table, then how and which functions
* to use is explained below.
*
* g_pVBoxFuncs->pfnClientInitialize does all the necessary startup
* action and provides us with pointers to an IVirtualBoxClient instance.
* It should be matched by a call to g_pVBoxFuncs->pfnClientUninitialize()
* when done.
*/
if (VBoxCGlueInit())
{
fprintf(stderr, "s: FATAL: VBoxCGlueInit failed: %s\n",
argv[0], g_szVBoxErrMsg);
38
2 Environment-specific notes
return EXIT_FAILURE;
}
g_pVBoxFuncs->pfnClientInitialize(NULL, &vboxclient);
if (!vboxclient)
{
fprintf(stderr, "%s: FATAL: could not get VirtualBoxClient reference\n",
argv[0]);
return EXIT_FAILURE;
}
If vboxclient is still NULL this means the initializationi failed and the VirtualBox C API cannot
be used.
It is possible to write C applications using multiple threads which all use the VirtualBox API, as
long as you’re initializing the C API in each thread which your application creates. This is done
with g_pVBoxFuncs->pfnClientThreadInitialize() and likewise before the thread is terminated the API must be uninitialized with g_pVBoxFuncs->pfnClientThreadUninitialize().
You don’t have to use these functions in worker threads created by COM/XPCOM (which you
might observe if your code uses active event handling), everything is initialized correctly already.
On Windows the C bindings create a marshaller which supports a wide range of COM threading
models, from STA to MTA, so you don’t have to worry about these details unless you plan to use
active event handlers. See the sample code how to get this to work reliably (in other words think
twice if passive event handling isn’t the better solution after you looked at the sample code).
2.3.6.4 C API attribute and method invocation
Method invocation is straightforward. It looks pretty much like the C++ way, by using a macro
which internally accesses the vtable, and additionally needs to be passed a pointer to the objecti
as the first argument to serve as the this pointer.
Using the C binding, all method invocations return a numeric result code of type HRESULT
(with a few exceptions which normally are not relevant).
If an interface is specified as returning an object, a pointer to a pointer to the appropriate
object must be passed as the last argument. The method will then store an object pointer in that
location.
Likewise, attributes (properties) can be queried or set using method invocations, using specially named methods. For each attribute there exists a getter method, the name of which is
composed of get_ followed by the capitalized attribute name. Unless the attribute is read-only,
an analogous set_ method exists. Let’s apply these rules to get the IVirtualBox reference, an
ISession instance reference and read the IVirtualBox::revision attribute:
rc = IVirtualBoxClient_get_VirtualBox(vboxclient, &vbox);
if (FAILED(rc) || !vbox)
{
PrintErrorInfo(argv[0], "FATAL: could not get VirtualBox reference", rc);
return EXIT_FAILURE;
}
rc = IVirtualBoxClient_get_Session(vboxclient, &session);
if (FAILED(rc) || !session)
{
PrintErrorInfo(argv[0], "FATAL: could not get Session reference", rc);
return EXIT_FAILURE;
}
rc = IVirtualBox_get_Revision(vbox, &revision);
if (SUCCEEDED(rc))
{
printf("Revision: %u\n", revision);
}
The convenience macros for calling a method are named by prepending the method name with
the interface name (using _as the separator).
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2 Environment-specific notes
So far only attribute getters were illustrated, but generic method calls are straightforward,
too:
IMachine *machine = NULL;
BSTR vmname = ...;
...
/*
* Calling IMachine::findMachine(...)
*/
rc = IVirtualBox_FindMachine(vbox, vmname, &machine);
As a more complicated example of a method invocation, let’s call IMachine::launchVMProcess
which returns an IProgress object. Note again that the method name is capitalized:
IProgress *progress;
...
rc = IMachine_LaunchVMProcess(
machine,
session,
sessionType,
env,
&progress
/*
/*
/*
/*
/*
this
arg 1
arg 2
arg 3
Out
*/
*/
*/
*/
*/
);
All objects with their methods and attributes are documented in chapter 5, Classes (interfaces),
page 50.
2.3.6.5 String handling
When dealing with strings you have to be aware of a string’s encoding and ownership.
Internally, the API uses UTF-16 encoded strings. A set of conversion functions is provided to
convert other encodings to and from UTF-16. The type of a UTF-16 character is BSTR (or its
constant counterpart CBSTR), which is an array type, represented by a pointer to the start of the
zero-terminated string. There are functions for converting between UTF-8 and UTF-16 strings
available through g_pVBoxFuncs:
int (*pfnUtf16ToUtf8)(CBSTR pwszString, char **ppszString);
int (*pfnUtf8ToUtf16)(const char *pszString, BSTR *ppwszString);
The ownership of a string determines who is responsible for releasing resources associated with
the string. Whenever the API creates a string (essentially for output parameters), ownership is
transferred to the caller. To avoid resource leaks, the caller should release resources once the
string is no longer needed. There are plenty of examples in the sample code.
2.3.6.6 Array handling
Arrays are handled somewhat similarly to strings, with the additional information of the number
of elements in the array. The exact details of string passing depends on the platform middleware (COM/XPCOM), and therefore the C binding offers helper functions to gloss over these
differences.
Passing arrays as input parameters to API methods is usually done by the following sequence,
calling a hypothetical IArrayDemo_PassArray API method:
static const ULONG aElements[] = { 1, 2, 3, 4 };
ULONG cElements = sizeof(aElements) / sizeof(aElements[0]);
SAFEARRAY *psa = NULL;
psa = g_pVBoxFuncs->pfnSafeArrayCreateVector(VT_I4, 0, cElements);
g_pVBoxFuncs->pfnSafeArrayCopyInParamHelper(psa, aElements, sizeof(aElements));
IArrayDemo_PassArray(pThis, ComSafeArrayAsInParam(psa));
g_pVBoxFuncs->pfnSafeArrayDestroy(psa);
40
2 Environment-specific notes
Likewise, getting arrays results from output parameters is done using helper functions which
manage memory allocations as part of their other functionality:
SAFEARRAY *psa = g_pVBoxFuncs->pfnSafeArrayOutParamAlloc();
ULONG *pData;
ULONG cElements;
IArrayDemo_ReturnArray(pThis, ComSafeArrayAsOutTypeParam(psa, ULONG));
g_pVBoxFuncs->pfnSafeArrayCopyOutParamHelper((void **)&pData, &cElements, VT_I4, psa);
g_pVBoxFuncs->pfnSafeArrayDestroy(psa);
This covers the necessary functionality for all array element types except interface references.
These need special helpers to manage the reference counting correctly. The following code
snippet gets the list of VMs, and passes the first IMachine reference to another API function
(assuming that there is at least one element in the array, to simplify the example):
SAFEARRAY psa = g_pVBoxFuncs->pfnSafeArrayOutParamAlloc();
IMachine **machines = NULL;
ULONG machineCnt = 0;
ULONG i;
IVirtualBox_get_Machines(virtualBox, ComSafeArrayAsOutIfaceParam(machinesSA, IMachine *));
g_pVBoxFuncs->pfnSafeArrayCopyOutIfaceParamHelper((IUnknown ***)&machines, &machineCnt, machinesSA);
g_pVBoxFuncs->pfnSafeArrayDestroy(machinesSA);
/* Now "machines" contains the IMachine references, and machineCnt the
* number of elements in the array. */
...
SAFEARRAY *psa = g_pVBoxFuncs->pfnSafeArrayCreateVector(VT_IUNKNOWN, 0, 1);
g_pVBoxFuncs->pfnSafeArrayCopyInParamHelper(psa, (void *)&machines[0], sizeof(machines[0]));
IVirtualBox_GetMachineStates(ComSafeArrayAsInParam(psa), ...);
...
g_pVBoxFuncs->pfnSafeArrayDestroy(psa);
for (i = 0; i < machineCnt; ++i)
{
IMachine *machine = machines[i];
IMachine_Release(machine);
}
free(machines);
Handling output parameters needs more special effort than input parameters, thus only for
the former there are special helpers, and the latter is handled through the generic array support.
2.3.6.7 Event handling
The VirtualBox API offers two types of event handling, active and passive, and consequently
there is support for both with the C API binding. Active event handling (based on asynchronous
callback invocation for event delivery) is more difficult, as it requires the construction of valid
C++ objects in C, which is inherently platform and compiler dependent. Passive event handling
is much simpler, it relies on an event loop, fetching events and triggering the necessary handlers
explicitly in the API client code. Both approaches depend on an event loop to make sure that
events get delivered in a timely manner, with differences what exactly needs to be done.
The C API sample contains code for both event handling styles, and one has to modify the
appropriate #define to select which style is actually used by the compiled program. It allows a
good comparison between the two variants, and the code sequences are probably worth reusing
without much change in other API clients with only minor adaptions.
Active event handling needs to ensure that the following helper function is called frequently
enough in the primary thread:
g_pVBoxFuncs->pfnProcessEventQueue(cTimeoutMS);
The actual event handler implementation is quite tedious, as it has to implement a complete
API interface. Especially on Windows it is a lot of work to implement the complicated IDispatch
41
2 Environment-specific notes
interface, requiring to load COM type information and using it in the IDispatch method implementation. Overall this is quite tedious compared to passive event handling.
Passive event handling uses a similar event loop structure, which requires calling the following
function in a loop, and processing the returned event appropriately:
rc = IEventSource_GetEvent(pEventSource, pListener, cTimeoutMS, &pEvent);
After processing the event it needs to be marked as processed with the following method call:
rc = IEventSource_EventProcessed(pEventSource, pListener, pEvent);
This is vital for vetoable events, as they would be stuck otherwise, waiting whether the veto
comes or not. It does not do any harm for other event types, and in the end is cheaper than
checking if the event at hand is vetoable or not.
The general event handling concepts are described in the API specification (see chapter 3.4,
VirtualBox events, page 46), including how to aggregate multiple event sources for processing
in one event loop. As mentioned, the sample illustrates the practical aspects of how to use
both types of event handling, active and passive, from a C application. Additional hints are in
the comments documenting the helper methods in VBoxCAPI_v4_3.h. The code complexity of
active event handling (and its inherenly platform/compiler specific aspects) should be motivation
to use passive event handling whereever possible.
2.3.6.8 C API uninitialization
Uninitialization is performed by g_pVBoxFuncs->pfnClientUninitialize(). If your program
can exit from more than one place, it is a good idea to install this function as an exit handler
with Standard C’s atexit() just after calling g_pVBoxFuncs->pfnClientInitialize() , e.g.
#include <stdlib.h>
#include <stdio.h>
...
/*
* Make sure g_pVBoxFuncs->pfnClientUninitialize() is called at exit, no
* matter if we return from the initial call to main or call exit()
* somewhere else. Note that atexit registered functions are not
* called upon abnormal termination, i.e. when calling abort() or
* signal().
*/
if (atexit(g_pVBoxFuncs->pfnClientUninitialize()) != 0) {
fprintf(stderr, "failed to register g_pVBoxFuncs->pfnClientUninitialize()\n");
exit(EXIT_FAILURE);
}
Another idea would be to write your own void myexit(int status) function, calling
g_pVBoxFuncs->pfnClientUninitialize() followed by the real exit(), and use it instead
of exit() throughout your program and at the end of main.
If you expect the program to be terminated by a signal (e.g. user types CTRL-C sending
SIGINT) you might want to install a signal handler setting a flag noting that a signal was sent
and then calling g_pVBoxFuncs->pfnClientUninitialize() later on, not from the handler
itself.
That said, if a client program forgets to call g_pVBoxFuncs->pfnClientUninitialize() before it terminates, there is a mechanism in place which will eventually release references held by
the client. On Windows it can take quite a while, in the order of 6-7 minutes.
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2 Environment-specific notes
2.3.6.9 Compiling and linking
A program using the C binding has to open the library during runtime using the help of glue
code provided and as shown in the example tstCAPIGlue.c. Compilation and linking can be
achieved with a makefile fragment similar to:
# Where is the SDK directory?
PATH_SDK
= ../../..
CAPI_INC
= -I$(PATH_SDK)/bindings/c/include
ifeq ($(BUILD_PLATFORM),win)
PLATFORM_INC = -I$(PATH_SDK)/bindings/mscom/include
PLATFORM_LIB = $(PATH_SDK)/bindings/mscom/lib
else
PLATFORM_INC
PLATFORM_LIB
endif
GLUE_DIR
GLUE_INC
= -I$(PATH_SDK)/bindings/xpcom/include
= $(PATH_SDK)/bindings/xpcom/lib
= $(PATH_SDK)/bindings/c/glue
= -I$(GLUE_DIR)
# Compile Glue Library
VBoxCAPIGlue.o: $(GLUE_DIR)/VBoxCAPIGlue.c
$(CC) $(CFLAGS) $(CAPI_INC) $(PLATFORM_INC) $(GLUE_INC) -o $@ -c $<
# Compile interface ID list
VirtualBox_i.o: $(PLATFORM_LIB)/VirtualBox_i.c
$(CC) $(CFLAGS) $(CAPI_INC) $(PLATFORM_INC) $(GLUE_INC) -o $@ -c $<
# Compile program code
program.o: program.c
$(CC) $(CFLAGS) $(CAPI_INC) $(PLATFORM_INC) $(GLUE_INC) -o $@ -c $<
# Link program.
program: program.o VBoxCAPICGlue.o VirtualBox_i.o
$(CC) -o $@ $^ -ldl -lpthread
2.3.6.10 Conversion of code using legacy C binding
This section aims to make the task of converting code using the legacy C binding to the new style
a breeze, by pointing out some key steps.
One necessary change is adjusting your Makefile to reflect the different include paths. See
above. There are now 3 relevant include directories, and most of it is pointing to the C binding
directory. The XPCOM include directory is still relevant for platforms where the XPCOM middleware is used, but most of the include files live elsewhere now, so it’s good to have it last.
Additionally the VirtualBox_i.c file needs to be compiled and linked to the program, it contains the IIDs relevant for the VirtualBox API, making sure they are not replicated endlessly if the
code refers to them frequently.
The C API client code should include VBoxCAPIGlue.h instead of VBoxXPCOMCGlue.h or
VBoxCAPI_v4_3.h, as this makes sure the correct macros and internal translations are selected.
All API method calls (anything mentioning vtbl) should be rewritten using the convenience
macros for calling methods, as these hide the internal details, are generally easier to use and
shorter to type. You should remove as many as possible (nsISupports **) or similar typecasts,
as the new style should use the correct type in most places, increasing the type safety in case of
an error in the source code.
To gloss over the platform differences, API client code should no longer rely on XPCOM specific interface names such as nsISupports, nsIException and nsIEventQueue, and replace
them by the platform independent interface names IUnknown and IErrorInfo for the first two
respectively. Event queue handling should be replaced by using the platform independent way
described in chapter 2.3.6.7, Event handling, page 41.
Finally adjust the string and array handling to use the new helpers, as these make sure the
code works without changes with both COM and XPCOM, which are significantly different in
43
2 Environment-specific notes
this area. The code should be double checked if it uses the correct way to manage memory, and
is freeing it only after the last use.
2.3.6.11 Legacy C binding to VirtualBox API for XPCOM
Note: This section applies to Linux, Mac OS X and Solaris hosts only and describes
deprecated use of the API from C.
Starting with version 2.2, VirtualBox offers a C binding for its API which works only on platforms using XPCOM. Refer to the old SDK documentation (included in the SDK packages for
version 4.3.6 or earlier), it still applies unchanged. The fundamental concepts are similar (but
the syntactical details are quite different) to the newer cross-platform C binding which should be
used for all new code, as the support for the old C binding will go away in a major release after
version 4.3.
44
3 Basic VirtualBox concepts; some
examples
The following explains some basic VirtualBox concepts such as the VirtualBox object, sessions and
how virtual machines are manipulated and launched using the Main API. The coding examples
use a pseudo-code style closely related to the object-oriented web service (OOWS) for JAX-WS.
Depending on which environment you are using, you will need to adjust the examples.
3.1 Obtaining basic machine information. Reading attributes
Any program using the Main API will first need access to the global VirtualBox object (see
IVirtualBox), from which all other functionality of the API is derived. With the OOWS for JAXWS, this is returned from the IWebsessionManager::logon() call.
To enumerate virtual machines, one would look at the “machines” array attribute in the
VirtualBox object (see IVirtualBox::machines). This array contains all virtual machines currently
registered with the host, each of them being an instance of IMachine. From each such instance,
one can query additional information, such as the UUID, the name, memory, operating system
and more by looking at the attributes; see the attributes list in IMachine documentation.
As mentioned in the preceding chapters, depending on your programming environment, attributes are mapped to corresponding “get” and (if the attribute is not read-only) “set” methods.
So when the documentation says that IMachine has a “name“ attribute, this means you need to
code something like the following to get the machine’s name:
IMachine machine = ...;
String name = machine.getName();
Boolean attribute getters can sometimes be called isAttribute() due to JAX-WS naming conventions.
3.2 Changing machine settings. Sessions
As said in the previous section, to read a machine’s attribute, one invokes the corresponding
“get” method. One would think that to change settings of a machine, it would suffice to call the
corresponding “set” method – for example, to set a VM’s memory to 1024 MB, one would call
setMemorySize(1024). Try that, and you will get an error: “The machine is not mutable.“
So unfortunately, things are not that easy. VirtualBox is a complicated environment in which
multiple processes compete for possibly the same resources, especially machine settings. As a
result, machines must be “locked” before they can either be modified or started. This is to prevent
multiple processes from making conflicting changes to a machine: it should, for example, not be
allowed to change the memory size of a virtual machine while it is running. (You can’t add more
memory to a real computer while it is running either, at least not to an ordinary PC.) Also, two
processes must not change settings at the same time, or start a machine at the same time.
These requirements are implemented in the Main API by way of “sessions”, in particular, the
ISession interface. Each process which talks to VirtualBox needs its own instance of ISession. In
the web service, you cannot create such an object, but vboxwebsrv creates one for you when
you log on, which you can obtain by calling IWebsessionManager::getSessionObject().
45
3 Basic VirtualBox concepts; some examples
This session object must then be used like a mutex semaphore in common programming environments. Before you can change machine settings, you must write-lock the machine by calling
IMachine::lockMachine() with your process’s session object.
After the machine has been locked, the ISession::machine attribute contains a copy of the
original IMachine object upon which the session was opened, but this copy is “mutable”: you can
invoke “set” methods on it.
When done making the changes to the machine, you must call IMachine::saveSettings(), which
will copy the changes you have made from your “mutable” machine back to the real machine and
write them out to the machine settings XML file. This will make your changes permanent.
Finally, it is important to always unlock the machine again, by calling ISession::unlockMachine().
Otherwise, when the calling process end, the machine will receive the “aborted” state, which can
lead to loss of data.
So, as an example, the sequence to change a machine’s memory to 1024 MB is something like
this:
IWebsessionManager mgr ...;
IVirtualBox vbox = mgr.logon(user, pass);
...
IMachine machine = ...; // read-only machine
ISession session = mgr.getSessionObject();
machine.lockMachine(session, LockType.Write); // machine is now locked for writing
IMachine mutable = session.getMachine();
// obtain the mutable machine copy
mutable.setMemorySize(1024);
mutable.saveSettings();
// write settings to XML
session.unlockMachine();
3.3 Launching virtual machines
To launch a virtual machine, you call IMachine::launchVMProcess(). In doing so, the caller
instructs the VirtualBox engine to start a new process with the virtual machine in it, since to the
host, each virtual machine looks like a single process, even if it has hundreds of its own processes
inside. (This new VM process in turn obtains a write lock on the machine, as described above,
to prevent conflicting changes from other processes; this is why opening another session will fail
while the VM is running.)
Starting a machine looks something like this:
IWebsessionManager mgr ...;
IVirtualBox vbox = mgr.logon(user, pass);
...
IMachine machine = ...; // read-only machine
ISession session = mgr.getSessionObject();
IProgress prog = machine.launchVMProcess(session,
"gui", // session type
"");
// possibly environment setting
prog.waitForCompletion(10000); // give the process 10 secs
if (prog.getResultCode() != 0) // check success
System.out.println("Cannot launch VM!")
The caller’s session object can then be used as a sort of remote control to the VM process that
was launched. It contains a “console” object (see ISession::console) with which the VM can be
paused, stopped, snapshotted or other things.
3.4 VirtualBox events
In VirtualBox, “events” provide a uniform mechanism to register for and consume specific events.
A VirtualBox client can register an “event listener” (represented by the IEventListener interface),
46
3 Basic VirtualBox concepts; some examples
which will then get notified by the server when an event (represented by the IEvent interface)
happens.
The IEvent interface is an abstract parent interface for all events that can occur in VirtualBox.
The actual events that the server sends out are then of one of the specific subclasses, for example
IMachineStateChangedEvent or IMediumChangedEvent.
As an example, the VirtualBox GUI waits for machine events and can thus update its display
when the machine state changes or machine settings are modified, even if this happens in another
client. This is how the GUI can automatically refresh its display even if you manipulate a machine
from another client, for example, from VBoxManage.
To register an event listener to listen to events, use code like this:
EventSource es = console.getEventSource();
IEventListener listener = es.createListener();
VBoxEventType aTypes[] = (VBoxEventType.OnMachineStateChanged);
// list of event types to listen for
es.registerListener(listener, aTypes, false /* active */);
// register passive listener
IEvent ev = es.getEvent(listener, 1000);
// wait up to one second for event to happen
if (ev != null)
{
// downcast to specific event interface (in this case we have only registered
// for one type, otherwise IEvent::type would tell us)
IMachineStateChangedEvent mcse = IMachineStateChangedEvent.queryInterface(ev);
... // inspect and do something
es.eventProcessed(listener, ev);
}
...
es.unregisterListener(listener);
A graphical user interface would probably best start its own thread to wait for events and then
process these in a loop.
The events mechanism was introduced with VirtualBox 3.3 and replaces various callback interfaces which were called for each event in the interface. The callback mechanism was not
compatible with scripting languages, local Java bindings and remote web services as they do not
support callbacks. The new mechanism with events and event listeners works with all of these.
To simplify developement of application using events, concept of event aggregator was introduced. Essentially it’s mechanism to aggregate multiple event sources into single one, and then
work with this single aggregated event source instead of original sources. As an example, one
can evaluate demo recorder in VirtualBox Python shell, shipped with SDK - it records mouse and
keyboard events, represented as separate event sources. Code is essentially like this:
listener = console.eventSource.createListener()
agg = console.eventSource.createAggregator([console.keyboard.eventSource, console.mouse.eventSource])
agg.registerListener(listener, [ctx[’global’].constants.VBoxEventType_Any], False)
registered = True
end = time.time() + dur
while time.time() < end:
ev = agg.getEvent(listener, 1000)
processEent(ev)
agg.unregisterListener(listener)
Without using aggregators consumer have to poll on both sources, or start multiple threads to
block on those sources.
47
4 The VirtualBox shell
VirtualBox comes with an extensible shell, which allows you to control your virtual machines
from the command line. It is also a nontrivial example of how to use the VirtualBox APIs from
Python, for all three COM/XPCOM/WS styles of the API.
You can easily extend this shell with your own commands. Create a subdirectory named
.config/VirtualBox/shexts below your home directory (respectively .VirtualBox/shexts
on a Windows system and Library/VirtualBox/shexts on OS X) and put a Python file implementing your shell extension commands in this directory. This file must contain an array named
commands containing your command definitions:
commands = {
’cmd1’: [’Command cmd1 help’, cmd1],
’cmd2’: [’Command cmd2 help’, cmd2]
}
For example, to create a command for creating hard drive images, the following code can be
used:
def createHdd(ctx,args):
# Show some meaningful error message on wrong input
if (len(args) < 3):
print "usage: createHdd sizeM location type"
return 0
# Get arguments
size = int(args[1])
loc = args[2]
if len(args) > 3:
format = args[3]
else:
# And provide some meaningful defaults
format = "vdi"
# Call VirtualBox API, using context’s fields
hdd = ctx[’vb’].createHardDisk(format, loc)
# Access constants using ctx[’global’].constants
progress = hdd.createBaseStorage(size, (ctx[’global’].constants.MediumVariant_Standard, ))
# use standard progress bar mechanism
ctx[’progressBar’](progress)
# Report errors
if not hdd.id:
print "cannot create disk (file %s exist?)" %(loc)
return 0
# Give user some feedback on success too
print "created HDD with id: %s" %(hdd.id)
# 0 means continue execution, other values mean exit from the interpreter
return 0
commands = {
’myCreateHDD’: [’Create virtual HDD, createHdd size location type’, createHdd]
48
4 The VirtualBox shell
}
Just store the above text in the file createHdd (or any other meaningful name) in
.config/VirtualBox/shexts/. Start the VirtualBox shell, or just issue the reloadExts command, if the shell is already running. Your new command will now be available.
49
5 Classes (interfaces)
5.1 IAdditionsFacility
Note: With the web service, this interface is mapped to a structure. Attributes that
return this interface will not return an object, but a complete structure containing the
attributes listed below as structure members.
Structure representing a Guest Additions facility.
5.1.1 Attributes
5.1.1.1 classType (read-only)
AdditionsFacilityClass IAdditionsFacility::classType
The class this facility is part of.
5.1.1.2 lastUpdated (read-only)
long long IAdditionsFacility::lastUpdated
Time stamp of the last status update, in milliseconds since 1970-01-01 UTC.
5.1.1.3 name (read-only)
wstring IAdditionsFacility::name
The facility’s friendly name.
5.1.1.4 status (read-only)
AdditionsFacilityStatus IAdditionsFacility::status
The current status.
5.1.1.5 type (read-only)
AdditionsFacilityType IAdditionsFacility::type
The facility’s type ID.
5.2 IAdditionsStateChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when a Guest Additions property changes. Interested callees should query IGuest
attributes to find out what has changed.
50
5 Classes (interfaces)
5.3 IAppliance
Represents a platform-independent appliance in OVF format. An instance of this is returned by
IVirtualBox::createAppliance(), which can then be used to import and export virtual machines
within an appliance with VirtualBox.
The OVF standard suggests two different physical file formats:
1. If the appliance is distributed as a set of files, there must be at least one XML descriptor file
that conforms to the OVF standard and carries an .ovf file extension. If this descriptor file
references other files such as disk images, as OVF appliances typically do, those additional
files must be in the same directory as the descriptor file.
2. If the appliance is distributed as a single file, it must be in TAR format and have the .ova file
extension. This TAR file must then contain at least the OVF descriptor files and optionally
other files.
At this time, VirtualBox does not not yet support the packed (TAR) variant; support will be
added with a later version.
Importing an OVF appliance into VirtualBox as instances of IMachine involves the following
sequence of API calls:
1. Call IVirtualBox::createAppliance(). This will create an empty IAppliance object.
2. On the new object, call read() with the full path of the OVF file you would like to import.
So long as this file is syntactically valid, this will succeed and fill the appliance object with
the parsed data from the OVF file.
3. Next, call interpret(), which analyzes the OVF data and sets up the contents of the
IAppliance attributes accordingly. These can be inspected by a VirtualBox front-end
such as the GUI, and the suggestions can be displayed to the user. In particular, the
virtualSystemDescriptions[] array contains instances of IVirtualSystemDescription which
represent the virtual systems (machines) in the OVF, which in turn describe the virtual
hardware prescribed by the OVF (network and hardware adapters, virtual disk images,
memory size and so on). The GUI can then give the user the option to confirm and/or
change these suggestions.
4. If desired, call IVirtualSystemDescription::setFinalValues() for each virtual system (machine) to override the suggestions made by the interpret() routine.
5. Finally, call importMachines() to create virtual machines in VirtualBox as instances of
IMachine that match the information in the virtual system descriptions. After this call
succeeded, the UUIDs of the machines created can be found in the machines[] array attribute.
Exporting VirtualBox machines into an OVF appliance involves the following steps:
1. As with importing, first call IVirtualBox::createAppliance() to create an empty IAppliance
object.
2. For each machine you would like to export, call IMachine::exportTo() with the IAppliance
object you just created. Each such call creates one instance of IVirtualSystemDescription
inside the appliance.
3. If desired, call IVirtualSystemDescription::setFinalValues() for each virtual system (machine) to override the suggestions made by the IMachine::exportTo() routine.
4. Finally, call write() with a path specification to have the OVF file written.
51
5 Classes (interfaces)
5.3.1 Attributes
5.3.1.1 path (read-only)
wstring IAppliance::path
Path to the main file of the OVF appliance, which is either the .ovf or the .ova file passed to
read() (for import) or write() (for export). This attribute is empty until one of these methods
has been called.
5.3.1.2 disks (read-only)
wstring IAppliance::disks[]
Array of virtual disk definitions. One such description exists for each disk definition in the
OVF; each string array item represents one such piece of disk information, with the information
fields separated by tab (\\t) characters.
The caller should be prepared for additional fields being appended to this string in future
versions of VirtualBox and therefore check for the number of tabs in the strings returned.
In the current version, the following eight fields are returned per string in the array:
1. Disk ID (unique string identifier given to disk)
2. Capacity (unsigned integer indicating the maximum capacity of the disk)
3. Populated size (optional unsigned integer indicating the current size of the disk; can be
approximate; -1 if unspecified)
4. Format (string identifying the disk format, typically “http://www.vmware.com/specifications/vmdk.html#sparse
5. Reference (where to find the disk image, typically a file name; if empty, then the disk
should be created on import)
6. Image size (optional unsigned integer indicating the size of the image, which need not
necessarily be the same as the values specified above, since the image may be compressed
or sparse; -1 if not specified)
7. Chunk size (optional unsigned integer if the image is split into chunks; presently unsupported and always -1)
8. Compression (optional string equaling “gzip” if the image is gzip-compressed)
5.3.1.3 virtualSystemDescriptions (read-only)
IVirtualSystemDescription IAppliance::virtualSystemDescriptions[]
Array of virtual system descriptions. One such description is created for each virtual system (machine) found in the OVF. This array is empty until either interpret() (for import) or
IMachine::exportTo() (for export) has been called.
5.3.1.4 machines (read-only)
wstring IAppliance::machines[]
Contains the UUIDs of the machines created from the information in this appliances. This is
only relevant for the import case, and will only contain data after a call to importMachines()
succeeded.
52
5 Classes (interfaces)
5.3.2 createVFSExplorer
IVFSExplorer IAppliance::createVFSExplorer(
[in] wstring URI)
URI The URI describing the file system to use.
Returns a IVFSExplorer object for the given URI.
5.3.3 getWarnings
wstring[] IAppliance::getWarnings()
Returns textual warnings which occurred during execution of interpret().
5.3.4 importMachines
IProgress IAppliance::importMachines(
[in] ImportOptions options[])
options Options for the importing operation.
Imports the appliance into VirtualBox by creating instances of IMachine and other interfaces
that match the information contained in the appliance as closely as possible, as represented by
the import instructions in the virtualSystemDescriptions[] array.
Calling this method is the final step of importing an appliance into VirtualBox; see IAppliance
for an overview.
Since importing the appliance will most probably involve copying and converting disk images,
which can take a long time, this method operates asynchronously and returns an IProgress object
to allow the caller to monitor the progress.
After the import succeeded, the UUIDs of the IMachine instances created can be retrieved from
the machines[] array attribute.
5.3.5 interpret
void IAppliance::interpret()
Interprets the OVF data that was read when the appliance was constructed. After calling this
method, one can inspect the virtualSystemDescriptions[] array attribute, which will then contain
one IVirtualSystemDescription for each virtual machine found in the appliance.
Calling this method is the second step of importing an appliance into VirtualBox; see
IAppliance for an overview.
After calling this method, one should call getWarnings() to find out if problems were encountered during the processing which might later lead to errors.
5.3.6 read
IProgress IAppliance::read(
[in] wstring file)
file Name of appliance file to open (either with an .ovf or .ova extension, depending on
whether the appliance is distributed as a set of files or as a single file, respectively).
Reads an OVF file into the appliance object.
This method succeeds if the OVF is syntactically valid and, by itself, without errors. The mere
fact that this method returns successfully does not mean that VirtualBox supports all features
requested by the appliance; this can only be examined after a call to interpret().
53
5 Classes (interfaces)
5.3.7 write
IProgress IAppliance::write(
[in] wstring format,
[in] ExportOptions options[],
[in] wstring path)
format Output format, as a string. Currently supported formats are “ovf-0.9”, “ovf-1.0” and
“ovf-2.0”; future versions of VirtualBox may support additional formats.
options Options for the exporting operation.
path Name of appliance file to open (either with an .ovf or .ova extension, depending on
whether the appliance is distributed as a set of files or as a single file, respectively).
Writes the contents of the appliance exports into a new OVF file.
Calling this method is the final step of exporting an appliance from VirtualBox; see IAppliance
for an overview.
Since exporting the appliance will most probably involve copying and converting disk images,
which can take a long time, this method operates asynchronously and returns an IProgress object
to allow the caller to monitor the progress.
5.4 IAudioAdapter
The IAudioAdapter interface represents the virtual audio adapter of the virtual machine. Used
in IMachine::audioAdapter.
5.4.1 Attributes
5.4.1.1 enabled (read/write)
boolean IAudioAdapter::enabled
Flag whether the audio adapter is present in the guest system. If disabled, the virtual guest
hardware will not contain any audio adapter. Can only be changed when the VM is not running.
5.4.1.2 audioController (read/write)
AudioControllerType IAudioAdapter::audioController
The audio hardware we emulate.
5.4.1.3 audioDriver (read/write)
AudioDriverType IAudioAdapter::audioDriver
Audio driver the adapter is connected to. This setting can only be changed when the VM is not
running.
5.5 IBIOSSettings
The IBIOSSettings interface represents BIOS settings of the virtual machine. This is used only in
the IMachine::BIOSSettings attribute.
54
5 Classes (interfaces)
5.5.1 Attributes
5.5.1.1 logoFadeIn (read/write)
boolean IBIOSSettings::logoFadeIn
Fade in flag for BIOS logo animation.
5.5.1.2 logoFadeOut (read/write)
boolean IBIOSSettings::logoFadeOut
Fade out flag for BIOS logo animation.
5.5.1.3 logoDisplayTime (read/write)
unsigned long IBIOSSettings::logoDisplayTime
BIOS logo display time in milliseconds (0 = default).
5.5.1.4 logoImagePath (read/write)
wstring IBIOSSettings::logoImagePath
Local file system path for external BIOS splash image. Empty string means the default image
is shown on boot.
5.5.1.5 bootMenuMode (read/write)
BIOSBootMenuMode IBIOSSettings::bootMenuMode
Mode of the BIOS boot device menu.
5.5.1.6 ACPIEnabled (read/write)
boolean IBIOSSettings::ACPIEnabled
ACPI support flag.
5.5.1.7 IOAPICEnabled (read/write)
boolean IBIOSSettings::IOAPICEnabled
IO APIC support flag. If set, VirtualBox will provide an IO APIC and support IRQs above 15.
5.5.1.8 timeOffset (read/write)
long long IBIOSSettings::timeOffset
Offset in milliseconds from the host system time. This allows for guests running with a different system date/time than the host. It is equivalent to setting the system date/time in the
BIOS except it is not an absolute value but a relative one. Guest Additions time synchronization
honors this offset.
5.5.1.9 PXEDebugEnabled (read/write)
boolean IBIOSSettings::PXEDebugEnabled
PXE debug logging flag. If set, VirtualBox will write extensive PXE trace information to the
release log.
55
5 Classes (interfaces)
5.5.1.10 nonVolatileStorageFile (read-only)
wstring IBIOSSettings::nonVolatileStorageFile
The location of the file storing the non-volatile memory content when the VM is powered off.
The file does not always exist.
This feature will be realized after VirtualBox v4.3.0.
5.6 IBandwidthControl
Controls the bandwidth groups of one machine used to cap I/O done by a VM. This includes
network and disk I/O.
5.6.1 Attributes
5.6.1.1 numGroups (read-only)
unsigned long IBandwidthControl::numGroups
The current number of existing bandwidth groups managed.
5.6.2 createBandwidthGroup
void IBandwidthControl::createBandwidthGroup(
[in] wstring name,
[in] BandwidthGroupType type,
[in] long long maxBytesPerSec)
name Name of the bandwidth group.
type The type of the bandwidth group (network or disk).
maxBytesPerSec The maximum number of bytes which can be transfered by all entities attached to this group during one second.
Creates a new bandwidth group.
5.6.3 deleteBandwidthGroup
void IBandwidthControl::deleteBandwidthGroup(
[in] wstring name)
name Name of the bandwidth group to delete.
Deletes a new bandwidth group.
5.6.4 getAllBandwidthGroups
IBandwidthGroup[] IBandwidthControl::getAllBandwidthGroups()
Get all managed bandwidth groups.
5.6.5 getBandwidthGroup
IBandwidthGroup IBandwidthControl::getBandwidthGroup(
[in] wstring name)
name Name of the bandwidth group to get.
Get a bandwidth group by name.
56
5 Classes (interfaces)
5.7 IBandwidthGroup
Represents one bandwidth group.
5.7.1 Attributes
5.7.1.1 name (read-only)
wstring IBandwidthGroup::name
Name of the group.
5.7.1.2 type (read-only)
BandwidthGroupType IBandwidthGroup::type
Type of the group.
5.7.1.3 reference (read-only)
unsigned long IBandwidthGroup::reference
How many devices/medium attachments use this group.
5.7.1.4 maxBytesPerSec (read/write)
long long IBandwidthGroup::maxBytesPerSec
The maximum number of bytes which can be transfered by all entities attached to this group
during one second.
5.8 IBandwidthGroupChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when one of the bandwidth groups changed
5.8.1 Attributes
5.8.1.1 bandwidthGroup (read-only)
IBandwidthGroup IBandwidthGroupChangedEvent::bandwidthGroup
The changed bandwidth group.
5.9 ICPUChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when a CPU changes.
57
5 Classes (interfaces)
5.9.1 Attributes
5.9.1.1 CPU (read-only)
unsigned long ICPUChangedEvent::CPU
The CPU which changed.
5.9.1.2 add (read-only)
boolean ICPUChangedEvent::add
Flag whether the CPU was added or removed.
5.10 ICPUExecutionCapChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when the CPU execution cap changes.
5.10.1 Attributes
5.10.1.1 executionCap (read-only)
unsigned long ICPUExecutionCapChangedEvent::executionCap
The new CPU execution cap value. (1-100)
5.11 ICanShowWindowEvent (IVetoEvent)
Note: This interface extends IVetoEvent and therefore supports all its methods and
attributes as well.
Notification when a call to IMachine::canShowConsoleWindow() is made by a front-end to
check if a subsequent call to IMachine::showConsoleWindow() can succeed.
The callee should give an answer appropriate to the current machine state using event veto.
This answer must remain valid at least until the next machine state change.
5.12 IClipboardModeChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when the shared clipboard mode changes.
5.12.1 Attributes
5.12.1.1 clipboardMode (read-only)
ClipboardMode IClipboardModeChangedEvent::clipboardMode
The new clipboard mode.
58
5 Classes (interfaces)
5.13 IConsole
The IConsole interface represents an interface to control virtual machine execution.
A console object gets created when a machine has been locked for a particular session (client
process) using IMachine::lockMachine() or IMachine::launchVMProcess(). The console object
can then be found in the session’s ISession::console attribute.
Methods of the IConsole interface allow the caller to query the current virtual machine execution state, pause the machine or power it down, save the machine state or take a snapshot,
attach and detach removable media and so on.
See also: ISession
5.13.1 Attributes
5.13.1.1 machine (read-only)
IMachine IConsole::machine
Machine object for this console session.
Note: This is a convenience property, it has the same value as ISession::machine of the
corresponding session object.
5.13.1.2 state (read-only)
MachineState IConsole::state
Current execution state of the machine.
Note: This property always returns the same value as the corresponding property of
the IMachine object for this console session. For the process that owns (executes) the
VM, this is the preferable way of querying the VM state, because no IPC calls are made.
5.13.1.3 guest (read-only)
IGuest IConsole::guest
Guest object.
5.13.1.4 keyboard (read-only)
IKeyboard IConsole::keyboard
Virtual keyboard object.
Note: If the machine is not running, any attempt to use the returned object will result
in an error.
59
5 Classes (interfaces)
5.13.1.5 mouse (read-only)
IMouse IConsole::mouse
Virtual mouse object.
Note: If the machine is not running, any attempt to use the returned object will result
in an error.
5.13.1.6 display (read-only)
IDisplay IConsole::display
Virtual display object.
Note: If the machine is not running, any attempt to use the returned object will result
in an error.
5.13.1.7 debugger (read-only)
IMachineDebugger IConsole::debugger
Debugging interface.
5.13.1.8 USBDevices (read-only)
IUSBDevice IConsole::USBDevices[]
Collection of USB devices currently attached to the virtual USB controller.
Note: The collection is empty if the machine is not running.
5.13.1.9 remoteUSBDevices (read-only)
IHostUSBDevice IConsole::remoteUSBDevices[]
List of USB devices currently attached to the remote VRDE client. Once a new device is physically attached to the remote host computer, it appears in this list and remains there until detached.
5.13.1.10 sharedFolders (read-only)
ISharedFolder IConsole::sharedFolders[]
Collection of shared folders for the current session. These folders are called transient shared
folders because they are available to the guest OS running inside the associated virtual machine
only for the duration of the session (as opposed to IMachine::sharedFolders[] which represent
permanent shared folders). When the session is closed (e.g. the machine is powered down),
these folders are automatically discarded.
New shared folders are added to the collection using createSharedFolder(). Existing shared
folders can be removed using removeSharedFolder().
60
5 Classes (interfaces)
5.13.1.11 VRDEServerInfo (read-only)
IVRDEServerInfo IConsole::VRDEServerInfo
Interface that provides information on Remote Desktop Extension (VRDE) connection.
5.13.1.12 eventSource (read-only)
IEventSource IConsole::eventSource
Event source for console events.
5.13.1.13 attachedPCIDevices (read-only)
IPCIDeviceAttachment IConsole::attachedPCIDevices[]
Array of PCI devices attached to this machine.
5.13.1.14 useHostClipboard (read/write)
boolean IConsole::useHostClipboard
Whether the guest clipboard should be connected to the host one or whether it should only
be allowed access to the VRDE clipboard. This setting may not affect existing guest clipboard
connections which are already connected to the host clipboard.
5.13.1.15 emulatedUSB (read-only)
IEmulatedUSB IConsole::emulatedUSB
Interface that manages emulated USB devices.
5.13.2 adoptSavedState
void IConsole::adoptSavedState(
[in] wstring savedStateFile)
savedStateFile Path to the saved state file to adopt.
Associates the given saved state file to the virtual machine.
On success, the machine will go to the Saved state. Next time it is powered up, it will be
restored from the adopted saved state and continue execution from the place where the saved
state file was created.
The specified saved state file path may be absolute or relative to the folder the VM normally
saves the state to (usually, IMachine::snapshotFolder).
Note: It’s a caller’s responsibility to make sure the given saved state file is compatible
with the settings of this virtual machine that represent its virtual hardware (memory
size, storage disk configuration etc.). If there is a mismatch, the behavior of the virtual
machine is undefined.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine state neither PoweredOff nor Aborted.
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5 Classes (interfaces)
5.13.3 attachUSBDevice
void IConsole::attachUSBDevice(
[in] uuid id)
id UUID of the host USB device to attach.
Attaches a host USB device with the given UUID to the USB controller of the virtual machine.
The device needs to be in one of the following states: Busy, Available or Held, otherwise an
error is immediately returned.
When the device state is Busy, an error may also be returned if the host computer refuses to
release it for some reason.
See also: IUSBDeviceFilters::deviceFilters[], USBDeviceState
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine state neither Running nor Paused.
• VBOX_E_PDM_ERROR: Virtual machine does not have a USB controller.
5.13.4 createSharedFolder
void IConsole::createSharedFolder(
[in] wstring name,
[in] wstring hostPath,
[in] boolean writable,
[in] boolean automount)
name Unique logical name of the shared folder.
hostPath Full path to the shared folder in the host file system.
writable Whether the share is writable or readonly
automount Whether the share gets automatically mounted by the guest or not.
Creates a transient new shared folder by associating the given logical name with the given host
path, adds it to the collection of shared folders and starts sharing it. Refer to the description of
ISharedFolder to read more about logical names.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine in Saved state or currently changing state.
• VBOX_E_FILE_ERROR: Shared folder already exists or not accessible.
5.13.5 deleteSnapshot
IProgress IConsole::deleteSnapshot(
[in] uuid id)
id UUID of the snapshot to delete.
Starts deleting the specified snapshot asynchronously. See ISnapshot for an introduction to
snapshots.
The execution state and settings of the associated machine stored in the snapshot will be
deleted. The contents of all differencing media of this snapshot will be merged with the contents
of their dependent child media to keep the medium chain valid (in other words, all changes
represented by media being deleted will be propagated to their child medium). After that, this
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snapshot’s differencing medium will be deleted. The parent of this snapshot will become a new
parent for all its child snapshots.
If the deleted snapshot is the current one, its parent snapshot will become a new current
snapshot. The current machine state is not directly affected in this case, except that currently
attached differencing media based on media of the deleted snapshot will be also merged as
described above.
If the deleted snapshot is the first or current snapshot, then the respective IMachine attributes
will be adjusted. Deleting the current snapshot will also implicitly call IMachine::saveSettings()
to make all current machine settings permanent.
Deleting a snapshot has the following preconditions:
• Child media of all normal media of the deleted snapshot must be accessible (see
IMedium::state) for this operation to succeed. If only one running VM refers to all images
which participates in merging the operation can be performed while the VM is running.
Otherwise all virtual machines whose media are directly or indirectly based on the media
of deleted snapshot must be powered off. In any case, online snapshot deleting usually is
slower than the same operation without any running VM.
• You cannot delete the snapshot if a medium attached to it has more than one child medium
(differencing images) because otherwise merging would be impossible. This might be the
case if there is more than one child snapshot or differencing images were created for other
reason (e.g. implicitly because of multiple machine attachments).
The virtual machine’s state is changed to “DeletingSnapshot”, “DeletingSnapshotOnline” or
“DeletingSnapshotPaused” while this operation is in progress.
Note: Merging medium contents can be very time and disk space consuming, if these
media are big in size and have many children. However, if the snapshot being deleted
is the last (head) snapshot on the branch, the operation will be rather quick.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: The running virtual machine prevents deleting this snapshot. This happens only in very specific situations, usually snapshots can be deleted without trouble while a VM is running. The error message text explains the reason for the
failure.
5.13.6 deleteSnapshotAndAllChildren
IProgress IConsole::deleteSnapshotAndAllChildren(
[in] uuid id)
id UUID of the snapshot to delete, including all its children.
Starts deleting the specified snapshot and all its children asynchronously. See ISnapshot
for an introduction to snapshots. The conditions and many details are the same as with
deleteSnapshot().
This operation is very fast if the snapshot subtree does not include the current state. It is still
significantly faster than deleting the snapshots one by one if the current state is in the subtree and
there are more than one snapshots from current state to the snapshot which marks the subtree,
since it eliminates the incremental image merging.
Note: This API method is right now not implemented!
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If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: The running virtual machine prevents deleting this snapshot. This happens only in very specific situations, usually snapshots can be deleted without trouble while a VM is running. The error message text explains the reason for the
failure.
• E_NOTIMPL: The method is not implemented yet.
5.13.7 deleteSnapshotRange
IProgress IConsole::deleteSnapshotRange(
[in] uuid startId,
[in] uuid endId)
startId UUID of the first snapshot to delete.
endId UUID of the last snapshot to delete.
Starts deleting the specified snapshot range. This is limited to linear snapshot lists, which
means there may not be any other child snapshots other than the direct sequence between the
start and end snapshot. If the start and end snapshot point to the same snapshot this method is
completely equivalent to deleteSnapshot(). See ISnapshot for an introduction to snapshots. The
conditions and many details are the same as with deleteSnapshot().
This operation is generally faster than deleting snapshots one by one and often also needs less
extra disk space before freeing up disk space by deleting the removed disk images corresponding
to the snapshot.
Note: This API method is right now not implemented!
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: The running virtual machine prevents deleting this snapshot. This happens only in very specific situations, usually snapshots can be deleted without trouble while a VM is running. The error message text explains the reason for the
failure.
• E_NOTIMPL: The method is not implemented yet.
5.13.8 detachUSBDevice
IUSBDevice IConsole::detachUSBDevice(
[in] uuid id)
id UUID of the USB device to detach.
Detaches an USB device with the given UUID from the USB controller of the virtual machine.
After this method succeeds, the VirtualBox server re-initiates all USB filters as if the device
were just physically attached to the host, but filters of this machine are ignored to avoid a
possible automatic re-attachment.
See also: IUSBDeviceFilters::deviceFilters[], USBDeviceState
If this method fails, the following error codes may be reported:
• VBOX_E_PDM_ERROR: Virtual machine does not have a USB controller.
• E_INVALIDARG: USB device not attached to this virtual machine.
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5.13.9 discardSavedState
void IConsole::discardSavedState(
[in] boolean fRemoveFile)
fRemoveFile Whether to also remove the saved state file.
Forcibly resets the machine to “Powered Off” state if it is currently in the “Saved” state (previously created by saveState()). Next time the machine is powered up, a clean boot will occur.
Note: This operation is equivalent to resetting or powering off the machine without
doing a proper shutdown of the guest operating system; as with resetting a running
phyiscal computer, it can can lead to data loss.
If fRemoveFile is true, the file in the machine directory into which the machine state
was saved is also deleted. If this is false, then the state can be recovered and later reinserted into a machine using adoptSavedState(). The location of the file can be found in the
IMachine::stateFilePath attribute.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine not in state Saved.
5.13.10 findUSBDeviceByAddress
IUSBDevice IConsole::findUSBDeviceByAddress(
[in] wstring name)
name Address of the USB device (as assigned by the host) to search for.
Searches for a USB device with the given host address.
See also: IUSBDevice::address
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: Given name does not correspond to any USB device.
5.13.11 findUSBDeviceById
IUSBDevice IConsole::findUSBDeviceById(
[in] uuid id)
id UUID of the USB device to search for.
Searches for a USB device with the given UUID.
See also: IUSBDevice::id
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: Given id does not correspond to any USB device.
5.13.12 getDeviceActivity
DeviceActivity IConsole::getDeviceActivity(
[in] DeviceType type)
type
Gets the current activity type of a given device or device group.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Invalid device type.
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5.13.13 getGuestEnteredACPIMode
boolean IConsole::getGuestEnteredACPIMode()
Checks if the guest entered the ACPI mode G0 (working) or G1 (sleeping). If this method
returns false, the guest will most likely not respond to external ACPI events.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine not in Running state.
5.13.14 getPowerButtonHandled
boolean IConsole::getPowerButtonHandled()
Checks if the last power button event was handled by guest.
If this method fails, the following error codes may be reported:
• VBOX_E_PDM_ERROR: Checking if the event was handled by the guest OS failed.
5.13.15 pause
void IConsole::pause()
Pauses the virtual machine execution.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine not in Running state.
• VBOX_E_VM_ERROR: Virtual machine error in suspend operation.
5.13.16 powerButton
void IConsole::powerButton()
Sends the ACPI power button event to the guest.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine not in Running state.
• VBOX_E_PDM_ERROR: Controlled power off failed.
5.13.17 powerDown
IProgress IConsole::powerDown()
Initiates the power down procedure to stop the virtual machine execution.
The completion of the power down procedure is tracked using the returned IProgress object.
After the operation is complete, the machine will go to the PoweredOff state.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine must be Running, Paused or Stuck to be
powered down.
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5.13.18 powerUp
IProgress IConsole::powerUp()
Starts the virtual machine execution using the current machine state (that is, its current execution state, current settings and current storage devices).
Note: This method is only useful for front-ends that want to actually execute virtual
machines in their own process (like the VirtualBox or VBoxSDL front-ends). Unless you
are intending to write such a front-end, do not call this method. If you simply want to
start virtual machine execution using one of the existing front-ends (for example the
VirtualBox GUI or headless server), use IMachine::launchVMProcess() instead; these
front-ends will power up the machine automatically for you.
If the machine is powered off or aborted, the execution will start from the beginning (as if the
real hardware were just powered on).
If the machine is in the Saved state, it will continue its execution the point where the state has
been saved.
If the machine IMachine::teleporterEnabled property is enabled on the machine being powered up, the machine will wait for an incoming teleportation in the TeleportingIn state. The
returned progress object will have at least three operations where the last three are defined as:
(1) powering up and starting TCP server, (2) waiting for incoming teleportations, and (3) perform teleportation. These operations will be reflected as the last three operations of the progress
objected returned by IMachine::launchVMProcess() as well.
See also: saveState()
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine already running.
• VBOX_E_HOST_ERROR: Host interface does not exist or name not set.
• VBOX_E_FILE_ERROR: Invalid saved state file.
5.13.19 powerUpPaused
IProgress IConsole::powerUpPaused()
Identical to powerUp except that the VM will enter the Paused state, instead of Running.
See also: powerUp()
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine already running.
• VBOX_E_HOST_ERROR: Host interface does not exist or name not set.
• VBOX_E_FILE_ERROR: Invalid saved state file.
5.13.20 removeSharedFolder
void IConsole::removeSharedFolder(
[in] wstring name)
name Logical name of the shared folder to remove.
Removes a transient shared folder with the given name previously created by createSharedFolder()
from the collection of shared folders and stops sharing it.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine in Saved state or currently changing state.
• VBOX_E_FILE_ERROR: Shared folder does not exists.
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5.13.21 reset
void IConsole::reset()
Resets the virtual machine.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine not in Running state.
• VBOX_E_VM_ERROR: Virtual machine error in reset operation.
5.13.22 restoreSnapshot
IProgress IConsole::restoreSnapshot(
[in] ISnapshot snapshot)
snapshot The snapshot to restore the VM state from.
Starts resetting the machine’s current state to the state contained in the given snapshot, asynchronously. All current settings of the machine will be reset and changes stored in differencing
media will be lost. See ISnapshot for an introduction to snapshots.
After this operation is successfully completed, new empty differencing media are created for
all normal media of the machine.
If the given snapshot is an online snapshot, the machine will go to the Saved, so that the next
time it is powered on, the execution state will be restored from the state of the snapshot.
Note: The machine must not be running, otherwise the operation will fail.
Note: If the machine state is Saved prior to this operation, the saved state file will be
implicitly deleted (as if discardSavedState() were called).
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine is running.
5.13.23 resume
void IConsole::resume()
Resumes the virtual machine execution.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine not in Paused state.
• VBOX_E_VM_ERROR: Virtual machine error in resume operation.
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5.13.24 saveState
IProgress IConsole::saveState()
Saves the current execution state of a running virtual machine and stops its execution.
After this operation completes, the machine will go to the Saved state. Next time it is powered
up, this state will be restored and the machine will continue its execution from the place where
it was saved.
This operation differs from taking a snapshot to the effect that it doesn’t create new differencing media. Also, once the machine is powered up from the state saved using this method, the
saved state is deleted, so it will be impossible to return to this state later.
Note: On success, this method implicitly calls IMachine::saveSettings() to save all current machine settings (including runtime changes to the DVD medium, etc.). Together
with the impossibility to change any VM settings when it is in the Saved state, this
guarantees adequate hardware configuration of the machine when it is restored from
the saved state file.
Note: The machine must be in the Running or Paused state, otherwise the operation
will fail.
See also: takeSnapshot()
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine state neither Running nor Paused.
• VBOX_E_FILE_ERROR: Failed to create directory for saved state file.
5.13.25 sleepButton
void IConsole::sleepButton()
Sends the ACPI sleep button event to the guest.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine not in Running state.
• VBOX_E_PDM_ERROR: Sending sleep button event failed.
5.13.26 takeSnapshot
IProgress IConsole::takeSnapshot(
[in] wstring name,
[in] wstring description)
name Short name for the snapshot.
description Optional description of the snapshot.
Saves the current execution state and all settings of the machine and creates differencing
images for all normal (non-independent) media. See ISnapshot for an introduction to snapshots.
This method can be called for a PoweredOff, Saved (see saveState()), Running or Paused
virtual machine. When the machine is PoweredOff, an offline snapshot is created. When the
machine is Running a live snapshot is created, and an online snapshot is created when Paused.
The taken snapshot is always based on the current snapshot of the associated virtual machine
and becomes a new current snapshot.
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Note: This method implicitly calls IMachine::saveSettings() to save all current machine
settings before taking an offline snapshot.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine currently changing state.
5.13.27 teleport
IProgress IConsole::teleport(
[in] wstring hostname,
[in] unsigned long tcpport,
[in] wstring password,
[in] unsigned long maxDowntime)
hostname The name or IP of the host to teleport to.
tcpport The TCP port to connect to (1..65535).
password The password.
maxDowntime The maximum allowed downtime given as milliseconds. 0 is not a valid value.
Recommended value: 250 ms.
The higher the value is, the greater the chance for a successful teleportation. A small value
may easily result in the teleportation process taking hours and eventually fail.
Note: The current implementation treats this a guideline, not as an absolute rule.
Teleport the VM to a different host machine or process.
TODO explain the details.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine not running or paused.
5.14 IDHCPServer
The IDHCPServer interface represents the VirtualBox DHCP server configuration.
To enumerate all the DHCP servers on the host, use the IVirtualBox::DHCPServers[] attribute.
5.14.1 Attributes
5.14.1.1 eventSource (read-only)
IEventSource IDHCPServer::eventSource
5.14.1.2 enabled (read/write)
boolean IDHCPServer::enabled
specifies if the DHCP server is enabled
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5.14.1.3 IPAddress (read-only)
wstring IDHCPServer::IPAddress
specifies server IP
5.14.1.4 networkMask (read-only)
wstring IDHCPServer::networkMask
specifies server network mask
5.14.1.5 networkName (read-only)
wstring IDHCPServer::networkName
specifies internal network name the server is used for
5.14.1.6 lowerIP (read-only)
wstring IDHCPServer::lowerIP
specifies from IP address in server address range
5.14.1.7 upperIP (read-only)
wstring IDHCPServer::upperIP
specifies to IP address in server address range
5.14.1.8 globalOptions (read-only)
wstring IDHCPServer::globalOptions[]
5.14.1.9 vmConfigs (read-only)
wstring IDHCPServer::vmConfigs[]
5.14.2 addGlobalOption
void IDHCPServer::addGlobalOption(
[in] DhcpOpt option,
[in] wstring value)
option
value
5.14.3 addVmSlotOption
void IDHCPServer::addVmSlotOption(
[in] wstring vmname,
[in] long slot,
[in] DhcpOpt option,
[in] wstring value)
vmname
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slot
option
value
5.14.4 getMacOptions
wstring[] IDHCPServer::getMacOptions(
[in] wstring mac)
mac
5.14.5 getVmSlotOptions
wstring[] IDHCPServer::getVmSlotOptions(
[in] wstring vmname,
[in] long slot)
vmname
slot
5.14.6 removeVmSlotOptions
void IDHCPServer::removeVmSlotOptions(
[in] wstring vmname,
[in] long slot)
vmname
slot
5.14.7 setConfiguration
void IDHCPServer::setConfiguration(
[in] wstring IPAddress,
[in] wstring networkMask,
[in] wstring FromIPAddress,
[in] wstring ToIPAddress)
IPAddress server IP address
networkMask server network mask
FromIPAddress server From IP address for address range
ToIPAddress server To IP address for address range
configures the server
If this method fails, the following error codes may be reported:
• E_INVALIDARG: invalid configuration supplied
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5.14.8 start
void IDHCPServer::start(
[in] wstring networkName,
[in] wstring trunkName,
[in] wstring trunkType)
networkName Name of internal network DHCP server should attach to.
trunkName Name of internal network trunk.
trunkType Type of internal network trunk.
Starts DHCP server process.
If this method fails, the following error codes may be reported:
• E_FAIL: Failed to start the process.
5.14.9 stop
void IDHCPServer::stop()
Stops DHCP server process.
If this method fails, the following error codes may be reported:
• E_FAIL: Failed to stop the process.
5.15 IDirectory
Abstract parent interface for directories handled by VirtualBox.
5.15.1 Attributes
5.15.1.1 directoryName (read-only)
wstring IDirectory::directoryName
Full path of directory.
5.15.1.2 filter (read-only)
wstring IDirectory::filter
The open filter.
5.15.2 close
void IDirectory::close()
Closes this directory. After closing operations like reading the next directory entry will not be
possible anymore.
5.15.3 read
IFsObjInfo IDirectory::read()
Reads the next directory entry of this directory.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: No more directory entries to read.
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5.16 IDisplay
The IDisplay interface represents the virtual machine’s display.
The object implementing this interface is contained in each IConsole::display attribute and
represents the visual output of the virtual machine.
The virtual display supports pluggable output targets represented by the IFramebuffer interface. Examples of the output target are a window on the host computer or an RDP session’s
display on a remote computer.
5.16.1 completeVHWACommand
Note: This method is not supported in the web service.
void IDisplay::completeVHWACommand(
[in] [ptr] octet command)
command Pointer to VBOXVHWACMD containing the completed command.
Signals that the Video HW Acceleration command has completed.
5.16.2 drawToScreen
Note: This method is not supported in the web service.
void IDisplay::drawToScreen(
[in] unsigned long screenId,
[in] [ptr] octet address,
[in] unsigned long x,
[in] unsigned long y,
[in] unsigned long width,
[in] unsigned long height)
screenId Monitor to take the screenshot from.
address Address to store the screenshot to
x Relative to the screen top left corner.
y Relative to the screen top left corner.
width Desired image width.
height Desired image height.
Draws a 32-bpp image of the specified size from the given buffer to the given point on the VM
display.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: Feature not implemented.
• VBOX_E_IPRT_ERROR: Could not draw to screen.
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5.16.3 getFramebuffer
void IDisplay::getFramebuffer(
[in] unsigned long screenId,
[out] IFramebuffer framebuffer,
[out] long xOrigin,
[out] long yOrigin)
screenId
framebuffer
xOrigin
yOrigin
Queries the framebuffer for given screen.
5.16.4 getScreenResolution
void IDisplay::getScreenResolution(
[in] unsigned long screenId,
[out] unsigned long width,
[out] unsigned long height,
[out] unsigned long bitsPerPixel,
[out] long xOrigin,
[out] long yOrigin)
screenId
width
height
bitsPerPixel
xOrigin
yOrigin
Queries display width, height and color depth for given screen.
5.16.5 invalidateAndUpdate
void IDisplay::invalidateAndUpdate()
Does a full invalidation of the VM display and instructs the VM to update it.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Could not invalidate and update screen.
5.16.6 resizeCompleted
void IDisplay::resizeCompleted(
[in] unsigned long screenId)
screenId
Signals that a framebuffer has completed the resize operation.
If this method fails, the following error codes may be reported:
• VBOX_E_NOT_SUPPORTED: Operation only valid for external frame buffers.
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5.16.7 setFramebuffer
void IDisplay::setFramebuffer(
[in] unsigned long screenId,
[in] IFramebuffer framebuffer)
screenId
framebuffer
Sets the framebuffer for given screen.
5.16.8 setSeamlessMode
void IDisplay::setSeamlessMode(
[in] boolean enabled)
enabled
Enables or disables seamless guest display rendering (seamless desktop integration) mode.
Note: Calling this method has no effect if IGuest::getFacilityStatus() with facility
Seamless does not return Active.
5.16.9 setVideoModeHint
void IDisplay::setVideoModeHint(
[in] unsigned long display,
[in] boolean enabled,
[in] boolean changeOrigin,
[in] long originX,
[in] long originY,
[in] unsigned long width,
[in] unsigned long height,
[in] unsigned long bitsPerPixel)
display The number of the guest display to send the hint to.
enabled True, if this guest screen is enabled, False otherwise.
changeOrigin True, if the origin of the guest screen should be changed, False otherwise.
originX The X origin of the guest screen.
originY The Y origin of the guest screen.
width
height
bitsPerPixel
Asks VirtualBox to request the given video mode from the guest. This is just a hint and it
cannot be guaranteed that the requested resolution will be used. Guest Additions are required
for the request to be seen by guests. The caller should issue the request and wait for a resolution
change and after a timeout retry.
Specifying 0 for either width, height or bitsPerPixel parameters means that the corresponding values should be taken from the current video mode (i.e. left unchanged).
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If the guest OS supports multi-monitor configuration then the display parameter specifies the
number of the guest display to send the hint to: 0 is the primary display, 1 is the first secondary
and so on. If the multi-monitor configuration is not supported, display must be 0.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: The display is not associated with any monitor.
5.16.10 takeScreenShot
Note: This method is not supported in the web service.
void IDisplay::takeScreenShot(
[in] unsigned long screenId,
[in] [ptr] octet address,
[in] unsigned long width,
[in] unsigned long height)
screenId
address
width
height
Takes a screen shot of the requested size and copies it to the 32-bpp buffer allocated by the
caller and pointed to by address. A pixel consists of 4 bytes in order: B, G, R, 0.
Note: This API can be used only locally by a VM process through the COM/XPCOM
C++ API as it requires pointer support. It is not available for scripting languages,
Java or any webservice clients. Unless you are writing a new VM frontend use
takeScreenShotToArray().
If this method fails, the following error codes may be reported:
• E_NOTIMPL: Feature not implemented.
• VBOX_E_IPRT_ERROR: Could not take a screenshot.
5.16.11 takeScreenShotPNGToArray
octet[] IDisplay::takeScreenShotPNGToArray(
[in] unsigned long screenId,
[in] unsigned long width,
[in] unsigned long height)
screenId Monitor to take the screenshot from.
width Desired image width.
height Desired image height.
Takes a guest screen shot of the requested size and returns it as PNG image in array.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: Feature not implemented.
• VBOX_E_IPRT_ERROR: Could not take a screenshot.
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5.16.12 takeScreenShotToArray
octet[] IDisplay::takeScreenShotToArray(
[in] unsigned long screenId,
[in] unsigned long width,
[in] unsigned long height)
screenId Monitor to take screenshot from.
width Desired image width.
height Desired image height.
Takes a guest screen shot of the requested size and returns it as an array of bytes in uncompressed 32-bpp RGBA format. A pixel consists of 4 bytes in order: R, G, B, 0xFF.
This API is slow, but could be the only option to get guest screenshot for scriptable languages
not allowed to manipulate with addresses directly.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: Feature not implemented.
• VBOX_E_IPRT_ERROR: Could not take a screenshot.
5.16.13 viewportChanged
void IDisplay::viewportChanged(
[in] unsigned long screenId,
[in] unsigned long x,
[in] unsigned long y,
[in] unsigned long width,
[in] unsigned long height)
screenId Monitor to take the screenshot from.
x Framebuffer x offset.
y Framebuffer y offset.
width Viewport width.
height Viewport height.
Signals that framebuffer window viewport has changed.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: The specified viewport data is invalid.
5.17 IDragAndDropModeChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when the drag’n’drop mode changes.
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5 Classes (interfaces)
5.17.1 Attributes
5.17.1.1 dragAndDropMode (read-only)
DragAndDropMode IDragAndDropModeChangedEvent::dragAndDropMode
The new drag’n’drop mode.
5.18 IEmulatedUSB
Manages emulated USB devices.
5.18.1 Attributes
5.18.1.1 webcams (read-only)
wstring IEmulatedUSB::webcams[]
Lists attached virtual webcams.
5.18.2 webcamAttach
void IEmulatedUSB::webcamAttach(
[in] wstring path,
[in] wstring settings)
path The host path of the capture device to use.
settings Optional settings.
Attaches the emulated USB webcam to the VM, which will use a host video capture device.
5.18.3 webcamDetach
void IEmulatedUSB::webcamDetach(
[in] wstring path)
path The host path of the capture device to detach.
Detaches the emulated USB webcam from the VM
5.19 IEvent
Abstract parent interface for VirtualBox events. Actual events will typically implement a more
specific interface which derives from this (see below).
Introduction to VirtualBox events
Generally speaking, an event (represented by this interface) signals that something happened,
while an event listener (see IEventListener) represents an entity that is interested in certain
events. In order for this to work with unidirectional protocols (i.e. web services), the concepts
of passive and active listener are used.
Event consumers can register themselves as listeners, providing an array of events they are interested in (see IEventSource::registerListener()). When an event triggers, the listener is notified
about the event. The exact mechanism of the notification depends on whether the listener was
registered as an active or passive listener:
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5 Classes (interfaces)
• An active listener is very similar to a callback: it is a function invoked by the API. As
opposed to the callbacks that were used in the API before VirtualBox 4.0 however, events
are now objects with an interface hierarchy.
• Passive listeners are somewhat trickier to implement, but do not require a client function to be callable, which is not an option with scripting languages or web service
clients. Internally the IEventSource implementation maintains an event queue for each
passive listener, and newly arrived events are put in this queue. When the listener calls
IEventSource::getEvent(), first element from its internal event queue is returned. When
the client completes processing of an event, the IEventSource::eventProcessed() function
must be called, acknowledging that the event was processed. It supports implementing
waitable events. On passive listener unregistration, all events from its queue are autoacknowledged.
Waitable events are useful in situations where the event generator wants to track delivery or
a party wants to wait until all listeners have completed the event. A typical example would be a
vetoable event (see IVetoEvent) where a listeners might veto a certain action, and thus the event
producer has to make sure that all listeners have processed the event and not vetoed before
taking the action.
A given event may have both passive and active listeners at the same time.
Using events
Any VirtualBox object capable of producing externally visible events provides an eventSource
read-only attribute, which is of the type IEventSource. This event source object is notified by
VirtualBox once something has happened, so consumers may register event listeners with this
event source. To register a listener, an object implementing the IEventListener interface must
be provided. For active listeners, such an object is typically created by the consumer, while
for passive listeners IEventSource::createListener() should be used. Please note that a listener
created with IEventSource::createListener() must not be used as an active listener.
Once created, the listener must be registered to listen for the desired events (see
IEventSource::registerListener()), providing an array of VBoxEventType enums. Those elements
can either be the individual event IDs or wildcards matching multiple event IDs.
After registration, the callback’s IEventListener::handleEvent() method is called automatically
when the event is triggered, while passive listeners have to call IEventSource::getEvent() and
IEventSource::eventProcessed() in an event processing loop.
The IEvent interface is an abstract parent interface for all such VirtualBox events coming in. As
a result, the standard use pattern inside IEventListener::handleEvent() or the event processing
loop is to check the type attribute of the event and then cast to the appropriate specific interface
using QueryInterface().
5.19.1 Attributes
5.19.1.1 type (read-only)
VBoxEventType IEvent::type
Event type.
5.19.1.2 source (read-only)
IEventSource IEvent::source
Source of this event.
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5 Classes (interfaces)
5.19.1.3 waitable (read-only)
boolean IEvent::waitable
If we can wait for this event being processed. If false, waitProcessed() returns immediately,
and setProcessed() doesn’t make sense. Non-waitable events are generally better performing, as
no additional overhead associated with waitability imposed. Waitable events are needed when
one need to be able to wait for particular event processed, for example for vetoable changes, or
if event refers to some resource which need to be kept immutable until all consumers confirmed
events.
5.19.2 setProcessed
void IEvent::setProcessed()
Internal method called by the system when all listeners of a particular event have called
IEventSource::eventProcessed(). This should not be called by client code.
5.19.3 waitProcessed
boolean IEvent::waitProcessed(
[in] long timeout)
timeout Maximum time to wait for event processing, in ms; 0 = no wait, -1 = indefinite wait.
Wait until time outs, or this event is processed. Event must be waitable for this operation to
have described semantics, for non-waitable returns true immediately.
5.20 IEventListener
Event listener. An event listener can work in either active or passive mode, depending on the
way it was registered. See IEvent for an introduction to VirtualBox event handling.
5.20.1 handleEvent
void IEventListener::handleEvent(
[in] IEvent event)
event Event available.
Handle event callback for active listeners. It is not called for passive listeners. After
calling handleEvent() on all active listeners and having received acknowledgement from all
passive listeners via IEventSource::eventProcessed(), the event is marked as processed and
IEvent::waitProcessed() will return immediately.
5.21 IEventSource
Event source. Generally, any object which could generate events can be an event source, or aggregate one. To simplify using one-way protocols such as webservices running on top of HTTP(S),
an event source can work with listeners in either active or passive mode. In active mode it is
up to the IEventSource implementation to call IEventListener::handleEvent(), in passive mode
the event source keeps track of pending events for each listener and returns available events on
demand.
See IEvent for an introduction to VirtualBox event handling.
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5 Classes (interfaces)
5.21.1 createAggregator
IEventSource IEventSource::createAggregator(
[in] IEventSource subordinates[])
subordinates Subordinate event source this one aggregates.
Creates an aggregator event source, collecting events from multiple sources. This way a single
listener can listen for events coming from multiple sources, using a single blocking getEvent()
on the returned aggregator.
5.21.2 createListener
IEventListener IEventSource::createListener()
Creates a new listener object, useful for passive mode.
5.21.3 eventProcessed
void IEventSource::eventProcessed(
[in] IEventListener listener,
[in] IEvent event)
listener Which listener processed event.
event Which event.
Must be called for waitable events after a particular listener finished its event processing.
When all listeners of a particular event have called this method, the system will then call
IEvent::setProcessed().
5.21.4 fireEvent
boolean IEventSource::fireEvent(
[in] IEvent event,
[in] long timeout)
event Event to deliver.
timeout Maximum time to wait for event processing (if event is waitable), in ms; 0 = no wait,
-1 = indefinite wait.
Fire an event for this source.
5.21.5 getEvent
IEvent IEventSource::getEvent(
[in] IEventListener listener,
[in] long timeout)
listener Which listener to get data for.
timeout Maximum time to wait for events, in ms; 0 = no wait, -1 = indefinite wait.
Get events from this peer’s event queue (for passive mode). Calling this method regularly is
required for passive event listeners to avoid system overload; see registerListener() for details.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: Listener is not registered, or autounregistered.
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5 Classes (interfaces)
5.21.6 registerListener
void IEventSource::registerListener(
[in] IEventListener listener,
[in] VBoxEventType interesting[],
[in] boolean active)
listener Listener to register.
interesting Event types listener is interested in. One can use wildcards like - Any to specify
wildcards, matching more than one event.
active Which mode this listener is operating in. In active mode, IEventListener::handleEvent()
is called directly. In passive mode, an internal event queue is created for this this
IEventListener. For each event coming in, it is added to queues for all interested
registered passive listeners. It is then up to the external code to call the listener’s
IEventListener::handleEvent() method. When done with an event, the external code must
call eventProcessed().
Register an event listener.
Note: To avoid system overload, the VirtualBox server process checks if passive event listeners call getEvent() frequently enough. In the current implementation, if more than 500 pending events are detected for a passive event listener,
it is forcefully unregistered by the system, and further getEvent() calls will return
VBOX_E_OBJECT_NOT_FOUND.
5.21.7 unregisterListener
void IEventSource::unregisterListener(
[in] IEventListener listener)
listener Listener to unregister.
Unregister an event listener. If listener is passive, and some waitable events are still in queue
they are marked as processed automatically.
5.22 IEventSourceChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when an event source state changes (listener added or removed).
5.22.1 Attributes
5.22.1.1 listener (read-only)
IEventListener IEventSourceChangedEvent::listener
Event listener which has changed.
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5 Classes (interfaces)
5.22.1.2 add (read-only)
boolean IEventSourceChangedEvent::add
Flag whether listener was added or removed.
5.23 IExtPack (IExtPackBase)
Note: This interface is not supported in the web service.
Note: This interface extends IExtPackBase and therefore supports all its methods and
attributes as well.
Interface for querying information about an extension pack as well as accessing COM objects
within it.
5.23.1 queryObject
$unknown IExtPack::queryObject(
[in] wstring objUuid)
objUuid The object ID. What exactly this is
Queries the IUnknown interface to an object in the extension pack main module. This allows
plug-ins and others to talk directly to an extension pack.
5.24 IExtPackBase
Note: This interface is not supported in the web service.
Interface for querying information about an extension pack as well as accessing COM objects
within it.
5.24.1 Attributes
5.24.1.1 name (read-only)
wstring IExtPackBase::name
The extension pack name. This is unique.
5.24.1.2 description (read-only)
wstring IExtPackBase::description
The extension pack description.
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5 Classes (interfaces)
5.24.1.3 version (read-only)
wstring IExtPackBase::version
The extension pack version string. This is restricted to the dotted version number and optionally a build indicator. No tree revision or tag will be included in the string as those
things are available as separate properties. An optional publisher tag may be present like for
IVirtualBox::version.
Examples: “1.2.3”, “1.2.3_BETA1” and “1.2.3_RC2”.
5.24.1.4 revision (read-only)
unsigned long IExtPackBase::revision
The extension pack internal revision number.
5.24.1.5 edition (read-only)
wstring IExtPackBase::edition
Edition indicator. This is usually empty.
Can for instance be used to help distinguishing between two editions of the same extension
pack where only the license, service contract or something differs.
5.24.1.6 VRDEModule (read-only)
wstring IExtPackBase::VRDEModule
The name of the VRDE module if the extension pack sports one.
5.24.1.7 plugIns (read-only)
IExtPackPlugIn IExtPackBase::plugIns[]
Note: This attribute is not supported in the web service.
Plug-ins provided by this extension pack.
5.24.1.8 usable (read-only)
boolean IExtPackBase::usable
Indicates whether the extension pack is usable or not.
There are a number of reasons why an extension pack might be unusable, typical examples
would be broken installation/file or that it is incompatible with the current VirtualBox version.
5.24.1.9 whyUnusable (read-only)
wstring IExtPackBase::whyUnusable
String indicating why the extension pack is not usable. This is an empty string if usable and
always a non-empty string if not usable.
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5 Classes (interfaces)
5.24.1.10 showLicense (read-only)
boolean IExtPackBase::showLicense
Whether to show the license before installation
5.24.1.11 license (read-only)
wstring IExtPackBase::license
The default HTML license text for the extension pack. Same as calling queryLicense with
preferredLocale and preferredLanguage as empty strings and format set to html.
5.24.2 queryLicense
wstring IExtPackBase::queryLicense(
[in] wstring preferredLocale,
[in] wstring preferredLanguage,
[in] wstring format)
preferredLocale The preferred license locale. Pass an empty string to get the default license.
preferredLanguage The preferred license language. Pass an empty string to get the default
language for the locale.
format The license format: html, rtf or txt. If a license is present there will always be an HTML
of it, the rich text format (RTF) and plain text (txt) versions are optional. If
Full feature version of the license attribute.
5.25 IExtPackFile (IExtPackBase)
Note: This interface is not supported in the web service.
Note: This interface extends IExtPackBase and therefore supports all its methods and
attributes as well.
Extension pack file (aka tarball, .vbox-extpack) representation returned by IExtPackManager::openExtPackFile().
This provides the base extension pack information with the addition of the file name.
5.25.1 Attributes
5.25.1.1 filePath (read-only)
wstring IExtPackFile::filePath
The path to the extension pack file.
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5 Classes (interfaces)
5.25.2 install
IProgress IExtPackFile::install(
[in] boolean replace,
[in] wstring displayInfo)
replace Set this to automatically uninstall any existing extension pack with the same name as
the one being installed.
displayInfo Platform specific display information. Reserved for future hacks.
Install the extension pack.
5.26 IExtPackManager
Note: This interface is not supported in the web service.
Interface for managing VirtualBox Extension Packs.
TODO: Describe extension packs, how they are managed and how to create one.
5.26.1 Attributes
5.26.1.1 installedExtPacks (read-only)
IExtPack IExtPackManager::installedExtPacks[]
Note: This attribute is not supported in the web service.
List of the installed extension packs.
5.26.2 cleanup
void IExtPackManager::cleanup()
Cleans up failed installs and uninstalls
5.26.3 find
Note: This method is not supported in the web service.
IExtPack IExtPackManager::find(
[in] wstring name)
name The name of the extension pack to locate.
Returns the extension pack with the specified name if found.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: No extension pack matching name was found.
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5 Classes (interfaces)
5.26.4 isExtPackUsable
boolean IExtPackManager::isExtPackUsable(
[in] wstring name)
name The name of the extension pack to check for.
Check if the given extension pack is loaded and usable.
5.26.5 openExtPackFile
Note: This method is not supported in the web service.
IExtPackFile IExtPackManager::openExtPackFile(
[in] wstring path)
path The path of the extension pack tarball. This can optionally be followed by a “::SHA256=hex-digit” of the tarball.
Attempts to open an extension pack file in preparation for installation.
5.26.6 queryAllPlugInsForFrontend
wstring[] IExtPackManager::queryAllPlugInsForFrontend(
[in] wstring frontendName)
frontendName The name of the frontend or component.
Gets the path to all the plug-in modules for a given frontend.
This is a convenience method that is intended to simplify the plug-in loading process for a
frontend.
5.26.7 uninstall
IProgress IExtPackManager::uninstall(
[in] wstring name,
[in] boolean forcedRemoval,
[in] wstring displayInfo)
name The name of the extension pack to uninstall.
forcedRemoval Forced removal of the extension pack. This means that the uninstall hook will
not be called.
displayInfo Platform specific display information. Reserved for future hacks.
Uninstalls an extension pack, removing all related files.
5.27 IExtPackPlugIn
Note: This interface is not supported in the web service.
Interface for keeping information about a plug-in that ships with an extension pack.
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5 Classes (interfaces)
5.27.1 Attributes
5.27.1.1 name (read-only)
wstring IExtPackPlugIn::name
The plug-in name.
5.27.1.2 description (read-only)
wstring IExtPackPlugIn::description
The plug-in description.
5.27.1.3 frontend (read-only)
wstring IExtPackPlugIn::frontend
The name of the frontend or component name this plug-in plugs into.
5.27.1.4 modulePath (read-only)
wstring IExtPackPlugIn::modulePath
The module path.
5.28 IExtraDataCanChangeEvent (IVetoEvent)
Note: This interface extends IVetoEvent and therefore supports all its methods and
attributes as well.
Notification when someone tries to change extra data for either the given machine or (if null)
global extra data. This gives the chance to veto against changes.
5.28.1 Attributes
5.28.1.1 machineId (read-only)
uuid IExtraDataCanChangeEvent::machineId
ID of the machine this event relates to. Null for global extra data changes.
5.28.1.2 key (read-only)
wstring IExtraDataCanChangeEvent::key
Extra data key that has changed.
5.28.1.3 value (read-only)
wstring IExtraDataCanChangeEvent::value
Extra data value for the given key.
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5 Classes (interfaces)
5.29 IExtraDataChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when machine specific or global extra data has changed.
5.29.1 Attributes
5.29.1.1 machineId (read-only)
uuid IExtraDataChangedEvent::machineId
ID of the machine this event relates to. Null for global extra data changes.
5.29.1.2 key (read-only)
wstring IExtraDataChangedEvent::key
Extra data key that has changed.
5.29.1.3 value (read-only)
wstring IExtraDataChangedEvent::value
Extra data value for the given key.
5.30 IFile
Abstract parent interface for files handled by VirtualBox.
5.30.1 Attributes
5.30.1.1 creationMode (read-only)
unsigned long IFile::creationMode
The creation mode.
5.30.1.2 disposition (read-only)
wstring IFile::disposition
The disposition mode.
5.30.1.3 eventSource (read-only)
IEventSource IFile::eventSource
Event source for guest session events.
5.30.1.4 fileName (read-only)
wstring IFile::fileName
Full path of the actual file name of this file.
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5 Classes (interfaces)
5.30.1.5 id (read-only)
unsigned long IFile::id
The file’s ID.
5.30.1.6 initialSize (read-only)
long long IFile::initialSize
The initial size in bytes when opened.
5.30.1.7 openMode (read-only)
wstring IFile::openMode
The open mode.
5.30.1.8 offset (read-only)
long long IFile::offset
Current read/write offset in bytes.
5.30.1.9 status (read-only)
FileStatus IFile::status
Current file status.
5.30.2 close
void IFile::close()
Closes this file. After closing operations like reading data, writing data or querying information
will not be possible anymore.
5.30.3 queryInfo
IFsObjInfo IFile::queryInfo()
Queries information about this file.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The method is not implemented yet.
5.30.4 read
octet[] IFile::read(
[in] unsigned long toRead,
[in] unsigned long timeoutMS)
toRead Number of bytes to read.
timeoutMS Timeout (in ms) to wait for the operation to complete. Pass 0 for an infinite timeout.
Reads data from this file.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The method is not implemented yet.
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5 Classes (interfaces)
5.30.5 readAt
octet[] IFile::readAt(
[in] long long offset,
[in] unsigned long toRead,
[in] unsigned long timeoutMS)
offset Offset in bytes to start reading.
toRead Number of bytes to read.
timeoutMS Timeout (in ms) to wait for the operation to complete. Pass 0 for an infinite timeout.
Reads data from an offset of this file.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The method is not implemented yet.
5.30.6 seek
void IFile::seek(
[in] long long offset,
[in] FileSeekType whence)
offset Offset to seek.
whence Seek mode; see FileSeekType for more information.
Changes the read and write position of this file.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The method is not implemented yet.
5.30.7 setACL
void IFile::setACL(
[in] wstring acl)
acl ACL string to set.
Sets the ACL of this file.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The method is not implemented yet.
5.30.8 write
unsigned long IFile::write(
[in] octet data[],
[in] unsigned long timeoutMS)
data Array of bytes to write. The size of the array also specifies how much to write.
timeoutMS Timeout (in ms) to wait for the operation to complete. Pass 0 for an infinite timeout.
Writes bytes to this file.
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5 Classes (interfaces)
5.30.9 writeAt
unsigned long IFile::writeAt(
[in] long long offset,
[in] octet data[],
[in] unsigned long timeoutMS)
offset Offset in bytes to start writing.
data Array of bytes to write. The size of the array also specifies how much to write.
timeoutMS Timeout (in ms) to wait for the operation to complete. Pass 0 for an infinite timeout.
Writes bytes at a certain offset to this file.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The method is not implemented yet.
5.31 IFramebuffer
5.31.1 Attributes
5.31.1.1 address (read-only)
octet IFramebuffer::address
Address of the start byte of the frame buffer.
5.31.1.2 width (read-only)
unsigned long IFramebuffer::width
Frame buffer width, in pixels.
5.31.1.3 height (read-only)
unsigned long IFramebuffer::height
Frame buffer height, in pixels.
5.31.1.4 bitsPerPixel (read-only)
unsigned long IFramebuffer::bitsPerPixel
Color depth, in bits per pixel. When pixelFormat is FOURCC_RGB, valid values are: 8, 15, 16,
24 and 32.
5.31.1.5 bytesPerLine (read-only)
unsigned long IFramebuffer::bytesPerLine
Scan line size, in bytes. When pixelFormat is FOURCC_RGB, the size of the scan line must be
aligned to 32 bits.
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5 Classes (interfaces)
5.31.1.6 pixelFormat (read-only)
unsigned long IFramebuffer::pixelFormat
Frame buffer pixel format. It’s either one of the values defined by FramebufferPixelFormat or
a raw FOURCC code.
Note: This attribute must never (and will never) return Opaque – the format of the
frame buffer must be always known.
5.31.1.7 usesGuestVRAM (read-only)
boolean IFramebuffer::usesGuestVRAM
Defines whether this frame buffer uses the virtual video card’s memory buffer (guest VRAM)
directly or not.
5.31.1.8 heightReduction (read-only)
unsigned long IFramebuffer::heightReduction
Hint from the frame buffer about how much of the standard screen height it wants to use for
itself. This information is exposed to the guest through the VESA BIOS and VMMDev interface
so that it can use it for determining its video mode table. It is not guaranteed that the guest
respects the value.
5.31.1.9 overlay (read-only)
IFramebufferOverlay IFramebuffer::overlay
An alpha-blended overlay which is superposed over the frame buffer. The initial purpose is to
allow the display of icons providing information about the VM state, including disk activity, in
front ends which do not have other means of doing that. The overlay is designed to controlled
exclusively by IDisplay. It has no locking of its own, and any changes made to it are not guaranteed to be visible until the affected portion of IFramebuffer is updated. The overlay can be
created lazily the first time it is requested. This attribute can also return null to signal that the
overlay is not implemented.
5.31.1.10 winId (read-only)
long long IFramebuffer::winId
Platform-dependent identifier of the window where context of this frame buffer is drawn, or
zero if there’s no such window.
5.31.2 getVisibleRegion
Note: This method is not supported in the web service.
unsigned long IFramebuffer::getVisibleRegion(
[in] [ptr] octet rectangles,
[in] unsigned long count)
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5 Classes (interfaces)
rectangles Pointer to the RTRECT array to receive region data.
count Number of RTRECT elements in the rectangles array.
Returns the visible region of this frame buffer.
If the rectangles parameter is null then the value of the count parameter is ignored and the
number of elements necessary to describe the current visible region is returned in countCopied.
If rectangles is not null but count is less than the required number of elements to store
region data, the method will report a failure. If count is equal or greater than the required
number of elements, then the actual number of elements copied to the provided array will be
returned in countCopied.
Note: The address of the provided array must be in the process space of this IFramebuffer object.
Note: Method not yet implemented.
5.31.3 lock
void IFramebuffer::lock()
Locks the frame buffer. Gets called by the IDisplay object where this frame buffer is bound to.
5.31.4 notify3DEvent
Note: This method is not supported in the web service.
void IFramebuffer::notify3DEvent(
[in] unsigned long type,
[in] [ptr] octet data)
type event type.
ported.
Currently only VBOX3D_NOTIFY_EVENT_TYPE_VISIBLE_3DDATA is sup-
data event-specific data, depends on the supplied event type
Notifies framebuffer about 3D backend event.
5.31.5 notifyUpdate
void IFramebuffer::notifyUpdate(
[in] unsigned long x,
[in] unsigned long y,
[in] unsigned long width,
[in] unsigned long height)
x
y
width
height
Informs about an update. Gets called by the display object where this buffer is registered.
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5 Classes (interfaces)
5.31.6 processVHWACommand
Note: This method is not supported in the web service.
void IFramebuffer::processVHWACommand(
[in] [ptr] octet command)
command Pointer to VBOXVHWACMD containing the command to execute.
Posts a Video HW Acceleration Command to the frame buffer for processing. The commands
used for 2D video acceleration (DDraw surface creation/destroying, blitting, scaling, color conversion, overlaying, etc.) are posted from quest to the host to be processed by the host hardware.
Note: The address of the provided command must be in the process space of this
IFramebuffer object.
5.31.7 requestResize
Note: This method is not supported in the web service.
boolean IFramebuffer::requestResize(
[in] unsigned long screenId,
[in] unsigned long pixelFormat,
[in] [ptr] octet VRAM,
[in] unsigned long bitsPerPixel,
[in] unsigned long bytesPerLine,
[in] unsigned long width,
[in] unsigned long height)
screenId Logical screen number. Must be used in the corresponding call to IDisplay::resizeCompleted()
if this call is made.
pixelFormat Pixel format of the memory buffer pointed to by VRAM. See also FramebufferPixelFormat.
VRAM Pointer to the virtual video card’s VRAM (may be null).
bitsPerPixel Color depth, bits per pixel.
bytesPerLine Size of one scan line, in bytes.
width Width of the guest display, in pixels.
height Height of the guest display, in pixels.
Requests a size and pixel format change.
There are two modes of working with the video buffer of the virtual machine. The indirect
mode implies that the IFramebuffer implementation allocates a memory buffer for the requested
display mode and provides it to the virtual machine. In direct mode, the IFramebuffer implementation uses the memory buffer allocated and owned by the virtual machine. This buffer
represents the video memory of the emulated video adapter (so called guest VRAM). The direct
mode is usually faster because the implementation gets a raw pointer to the guest VRAM buffer
which it can directly use for visualizing the contents of the virtual display, as opposed to the
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indirect mode where the contents of guest VRAM are copied to the memory buffer provided by
the implementation every time a display update occurs.
It is important to note that the direct mode is really fast only when the implementation uses
the given guest VRAM buffer directly, for example, by blitting it to the window representing
the virtual machine’s display, which saves at least one copy operation comparing to the indirect
mode. However, using the guest VRAM buffer directly is not always possible: the format and
the color depth of this buffer may be not supported by the target window, or it may be unknown
(opaque) as in case of text or non-linear multi-plane VGA video modes. In this case, the indirect
mode (that is always available) should be used as a fallback: when the guest VRAM contents
are copied to the implementation-provided memory buffer, color and format conversion is done
automatically by the underlying code.
The pixelFormat parameter defines whether the direct mode is available or not. If
pixelFormat is Opaque then direct access to the guest VRAM buffer is not available – the VRAM,
bitsPerPixel and bytesPerLine parameters must be ignored and the implementation must
use the indirect mode (where it provides its own buffer in one of the supported formats). In all
other cases, pixelFormat together with bitsPerPixel and bytesPerLine define the format of
the video memory buffer pointed to by the VRAM parameter and the implementation is free to
choose which mode to use. To indicate that this frame buffer uses the direct mode, the implementation of the usesGuestVRAM attribute must return true and address must return exactly
the same address that is passed in the VRAM parameter of this method; otherwise it is assumed
that the indirect strategy is chosen.
The width and height parameters represent the size of the requested display mode in both
modes. In case of indirect mode, the provided memory buffer should be big enough to store
data of the given display mode. In case of direct mode, it is guaranteed that the given VRAM
buffer contains enough space to represent the display mode of the given size. Note that this
frame buffer’s width and height attributes must return exactly the same values as passed to this
method after the resize is completed (see below).
The finished output parameter determines if the implementation has finished resizing the frame buffer or not. If, for some reason, the resize cannot be finished immediately during this call, finished must be set to false, and the implementation must
call IDisplay::resizeCompleted() after it has returned from this method as soon as possible. If finished is false, the machine will not call any frame buffer methods until
IDisplay::resizeCompleted() is called.
Note that if the direct mode is chosen, the bitsPerPixel, bytesPerLine and pixelFormat attributes
of this frame buffer must return exactly the same values as specified in the parameters of this
method, after the resize is completed. If the indirect mode is chosen, these attributes must
return values describing the format of the implementation’s own memory buffer address points
to. Note also that the bitsPerPixel value must always correlate with pixelFormat. Note that the
pixelFormat attribute must never return Opaque regardless of the selected mode.
Note: This method is called by the IDisplay object under the lock() provided by this
IFramebuffer implementation. If this method returns false in finished, then this
lock is not released until IDisplay::resizeCompleted() is called.
5.31.8 setVisibleRegion
Note: This method is not supported in the web service.
void IFramebuffer::setVisibleRegion(
[in] [ptr] octet rectangles,
[in] unsigned long count)
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rectangles Pointer to the RTRECT array.
count Number of RTRECT elements in the rectangles array.
Suggests a new visible region to this frame buffer. This region represents the area of the VM
display which is a union of regions of all top-level windows of the guest operating system running
inside the VM (if the Guest Additions for this system support this functionality). This information
may be used by the frontends to implement the seamless desktop integration feature.
Note: The address of the provided array must be in the process space of this IFramebuffer object.
Note: The IFramebuffer implementation must make a copy of the provided array of
rectangles.
Note: Method not yet implemented.
5.31.9 unlock
void IFramebuffer::unlock()
Unlocks the frame buffer. Gets called by the IDisplay object where this frame buffer is bound
to.
5.31.10 videoModeSupported
boolean IFramebuffer::videoModeSupported(
[in] unsigned long width,
[in] unsigned long height,
[in] unsigned long bpp)
width
height
bpp
Returns whether the frame buffer implementation is willing to support a given video mode.
In case it is not able to render the video mode (or for some reason not willing), it should return
false. Usually this method is called when the guest asks the VMM device whether a given video
mode is supported so the information returned is directly exposed to the guest. It is important
that this method returns very quickly.
5.32 IFramebufferOverlay (IFramebuffer)
Note: This interface extends IFramebuffer and therefore supports all its methods and
attributes as well.
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The IFramebufferOverlay interface represents an alpha blended overlay for displaying status
icons above an IFramebuffer. It is always created not visible, so that it must be explicitly shown.
It only covers a portion of the IFramebuffer, determined by its width, height and co-ordinates. It
is always in packed pixel little-endian 32bit ARGB (in that order) format, and may be written to
directly. Do re-read the width though, after setting it, as it may be adjusted (increased) to make
it more suitable for the front end.
5.32.1 Attributes
5.32.1.1 x (read-only)
unsigned long IFramebufferOverlay::x
X position of the overlay, relative to the frame buffer.
5.32.1.2 y (read-only)
unsigned long IFramebufferOverlay::y
Y position of the overlay, relative to the frame buffer.
5.32.1.3 visible (read/write)
boolean IFramebufferOverlay::visible
Whether the overlay is currently visible.
5.32.1.4 alpha (read/write)
unsigned long IFramebufferOverlay::alpha
The global alpha value for the overlay. This may or may not be supported by a given front end.
5.32.2 move
void IFramebufferOverlay::move(
[in] unsigned long x,
[in] unsigned long y)
x
y
Changes the overlay’s position relative to the IFramebuffer.
5.33 IFsObjInfo
Abstract parent interface for VirtualBox file system object information. This can be information
about a file or a directory, for example.
5.33.1 Attributes
5.33.1.1 accessTime (read-only)
long long IFsObjInfo::accessTime
Time of last access (st_atime).
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5.33.1.2 allocatedSize (read-only)
long long IFsObjInfo::allocatedSize
Disk allocation size (st_blocks * DEV_BSIZE).
5.33.1.3 birthTime (read-only)
long long IFsObjInfo::birthTime
Time of file birth (st_birthtime).
5.33.1.4 changeTime (read-only)
long long IFsObjInfo::changeTime
Time of last status change (st_ctime).
5.33.1.5 deviceNumber (read-only)
unsigned long IFsObjInfo::deviceNumber
The device number of a character or block device type object (st_rdev).
5.33.1.6 fileAttributes (read-only)
wstring IFsObjInfo::fileAttributes
File attributes. Not implemented yet.
5.33.1.7 generationId (read-only)
unsigned long IFsObjInfo::generationId
The current generation number (st_gen).
5.33.1.8 GID (read-only)
unsigned long IFsObjInfo::GID
The group the filesystem object is assigned (st_gid).
5.33.1.9 groupName (read-only)
wstring IFsObjInfo::groupName
The group name.
5.33.1.10 hardLinks (read-only)
unsigned long IFsObjInfo::hardLinks
Number of hard links to this filesystem object (st_nlink).
5.33.1.11 modificationTime (read-only)
long long IFsObjInfo::modificationTime
Time of last data modification (st_mtime).
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5.33.1.12 name (read-only)
wstring IFsObjInfo::name
The object’s name.
5.33.1.13 nodeId (read-only)
long long IFsObjInfo::nodeId
The unique identifier (within the filesystem) of this filesystem object (st_ino).
5.33.1.14 nodeIdDevice (read-only)
unsigned long IFsObjInfo::nodeIdDevice
The device number of the device which this filesystem object resides on (st_dev).
5.33.1.15 objectSize (read-only)
long long IFsObjInfo::objectSize
The logical size (st_size). For normal files this is the size of the file. For symbolic links, this is
the length of the path name contained in the symbolic link. For other objects this fields needs to
be specified.
5.33.1.16 type (read-only)
FsObjType IFsObjInfo::type
The object type. See FsObjType for more.
5.33.1.17 UID (read-only)
unsigned long IFsObjInfo::UID
The user owning the filesystem object (st_uid).
5.33.1.18 userFlags (read-only)
unsigned long IFsObjInfo::userFlags
User flags (st_flags).
5.33.1.19 userName (read-only)
wstring IFsObjInfo::userName
The user name.
5.34 IGuest
The IGuest interface represents information about the operating system running inside the virtual
machine. Used in IConsole::guest.
IGuest provides information about the guest operating system, whether Guest Additions are
installed and other OS-specific virtual machine properties.
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5.34.1 Attributes
5.34.1.1 OSTypeId (read-only)
wstring IGuest::OSTypeId
Identifier of the Guest OS type as reported by the Guest Additions. You may use
IVirtualBox::getGuestOSType() to obtain an IGuestOSType object representing details about
the given Guest OS type.
Note: If Guest Additions are not installed, this value will be the same as
IMachine::OSTypeId.
5.34.1.2 additionsRunLevel (read-only)
AdditionsRunLevelType IGuest::additionsRunLevel
Current run level of the Guest Additions.
5.34.1.3 additionsVersion (read-only)
wstring IGuest::additionsVersion
Version of the Guest Additions in the same format as IVirtualBox::version.
5.34.1.4 additionsRevision (read-only)
unsigned long IGuest::additionsRevision
The internal build revision number of the additions.
See also IVirtualBox::revision.
5.34.1.5 eventSource (read-only)
IEventSource IGuest::eventSource
Event source for guest events.
5.34.1.6 facilities (read-only)
IAdditionsFacility IGuest::facilities[]
Array of current known facilities. Only returns facilities where a status is known, e.g. facilities
with an unknown status will not be returned.
5.34.1.7 sessions (read-only)
IGuestSession IGuest::sessions[]
Returns a collection of all opened guest sessions.
5.34.1.8 memoryBalloonSize (read/write)
unsigned long IGuest::memoryBalloonSize
Guest system memory balloon size in megabytes (transient property).
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5.34.1.9 statisticsUpdateInterval (read/write)
unsigned long IGuest::statisticsUpdateInterval
Interval to update guest statistics in seconds.
5.34.2 createSession
IGuestSession IGuest::createSession(
[in] wstring user,
[in] wstring password,
[in] wstring domain,
[in] wstring sessionName)
user User name this session will be using to control the guest; has to exist and have the appropriate rights to execute programs in the VM. Must not be empty.
password Password of the user account to be used. Empty passwords are allowed.
domain Domain name of the user account to be used if the guest is part of a domain. Optional.
This feature is not implemented yet.
sessionName The session’s friendly name. Optional, can be empty.
Creates a new guest session for controlling the guest. The new session will be started asynchronously, meaning on return of this function it is not guaranteed that the guest session is in a
started and/or usable state. To wait for successful startup, use the IGuestSession::waitFor() call.
A guest session represents one impersonated user account on the guest, so every operation
will use the same credentials specified when creating the session object via createSession().
Anonymous sessions, that is, sessions without specifying a valid user account on the guest are
not allowed due to security reasons.
There can be a maximum of 32 sessions at once per VM. Each session keeps track of its started
guest processes, opened guest files or guest directories. To work on guest files or directories
a guest session offers methods to open or create such objects (see IGuestSession::fileOpen() or
IGuestSession::directoryOpen() for example).
There can be up to 2048 objects (guest processes, files or directories) a time per guest session.
Exceeding the limit will result in an appropriate error message.
When done with either of these objects, including the guest session itself, use the appropriate
close() method to let the object do its cleanup work.
Every guest session has its own environment variable block which gets automatically applied when starting a new guest process via IGuestSession::processCreate() or
IGuestSession::processCreateEx(). To override (or unset) certain environment variables already set by the guest session, one can specify a per-process environment block when using one
of the both above mentioned process creation calls.
Closing a session via IGuestSession::close() will try to close all the mentioned objects above
unless these objects are still used by a client.
5.34.3 dragGHDropped
IProgress IGuest::dragGHDropped(
[in] wstring format,
[in] DragAndDropAction action)
format The mime type the data must be in.
action The action to use.
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Informs the guest that a drop event occurred for a pending Drag and Drop event.
This is used in Guest - Host direction.
If this method fails, the following error codes may be reported:
• VBOX_E_VM_ERROR: VMM device is not available.
5.34.4 dragGHGetData
octet[] IGuest::dragGHGetData()
Fetch the data of a previously Drag and Drop event from the guest.
This is used in Guest - Host direction.
If this method fails, the following error codes may be reported:
• VBOX_E_VM_ERROR: VMM device is not available.
5.34.5 dragGHPending
DragAndDropAction IGuest::dragGHPending(
[in] unsigned long screenId,
[out] wstring formats[],
[out] DragAndDropAction allowedActions[])
screenId The screen id where the Drag and Drop event occurred.
formats On return the supported mime types.
allowedActions On return the actions which are allowed.
Ask the guest if there is any Drag and Drop operation pending in the guest.
If no Drag and Drop operation is pending currently, Ignore is returned.
This is used in Guest - Host direction.
If this method fails, the following error codes may be reported:
• VBOX_E_VM_ERROR: VMM device is not available.
5.34.6 dragHGDrop
DragAndDropAction IGuest::dragHGDrop(
[in] unsigned long screenId,
[in] unsigned long x,
[in] unsigned long y,
[in] DragAndDropAction defaultAction,
[in] DragAndDropAction allowedActions[],
[in] wstring formats[],
[out] wstring format)
screenId The screen id where the Drag and Drop event occurred.
x x-position of the event.
y y-position of the event.
defaultAction The default action to use.
allowedActions The actions which are allowed.
formats The supported mime types.
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format The resulting format of this event.
Informs the guest about a drop event.
This is used in Host - Guest direction.
If this method fails, the following error codes may be reported:
• VBOX_E_VM_ERROR: VMM device is not available.
5.34.7 dragHGEnter
DragAndDropAction IGuest::dragHGEnter(
[in] unsigned long screenId,
[in] unsigned long y,
[in] unsigned long x,
[in] DragAndDropAction defaultAction,
[in] DragAndDropAction allowedActions[],
[in] wstring formats[])
screenId The screen id where the Drag and Drop event occurred.
y y-position of the event.
x x-position of the event.
defaultAction The default action to use.
allowedActions The actions which are allowed.
formats The supported mime types.
Informs the guest about a Drag and Drop enter event.
This is used in Host - Guest direction.
If this method fails, the following error codes may be reported:
• VBOX_E_VM_ERROR: VMM device is not available.
5.34.8 dragHGLeave
void IGuest::dragHGLeave(
[in] unsigned long screenId)
screenId The screen id where the Drag and Drop event occurred.
Informs the guest about a Drag and Drop leave event.
This is used in Host - Guest direction.
If this method fails, the following error codes may be reported:
• VBOX_E_VM_ERROR: VMM device is not available.
5.34.9 dragHGMove
DragAndDropAction IGuest::dragHGMove(
[in] unsigned long screenId,
[in] unsigned long x,
[in] unsigned long y,
[in] DragAndDropAction defaultAction,
[in] DragAndDropAction allowedActions[],
[in] wstring formats[])
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screenId The screen id where the Drag and Drop event occurred.
x x-position of the event.
y y-position of the event.
defaultAction The default action to use.
allowedActions The actions which are allowed.
formats The supported mime types.
Informs the guest about a Drag and Drop move event.
This is used in Host - Guest direction.
If this method fails, the following error codes may be reported:
• VBOX_E_VM_ERROR: VMM device is not available.
5.34.10 dragHGPutData
IProgress IGuest::dragHGPutData(
[in] unsigned long screenId,
[in] wstring format,
[in] octet data[])
screenId The screen id where the Drag and Drop event occurred.
format The mime type the data is in.
data The actual data.
Informs the guest about a drop data event.
This is used in Host - Guest direction.
If this method fails, the following error codes may be reported:
• VBOX_E_VM_ERROR: VMM device is not available.
5.34.11 findSession
IGuestSession[] IGuest::findSession(
[in] wstring sessionName)
sessionName The session’s friendly name to find. Wildcards like ? and * are allowed.
Finds guest sessions by their friendly name and returns an interface array with all found guest
sessions.
5.34.12 getAdditionsStatus
boolean IGuest::getAdditionsStatus(
[in] AdditionsRunLevelType level)
level Status level to check
Retrieve the current status of a certain Guest Additions run level.
If this method fails, the following error codes may be reported:
• VBOX_E_NOT_SUPPORTED: Wrong status level specified.
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5.34.13 getFacilityStatus
AdditionsFacilityStatus IGuest::getFacilityStatus(
[in] AdditionsFacilityType facility,
[out] long long timestamp)
facility Facility to check status for.
timestamp Timestamp (in ms) of last status update seen by the host.
Get the current status of a Guest Additions facility.
5.34.14 internalGetStatistics
void IGuest::internalGetStatistics(
[out] unsigned long cpuUser,
[out] unsigned long cpuKernel,
[out] unsigned long cpuIdle,
[out] unsigned long memTotal,
[out] unsigned long memFree,
[out] unsigned long memBalloon,
[out] unsigned long memShared,
[out] unsigned long memCache,
[out] unsigned long pagedTotal,
[out] unsigned long memAllocTotal,
[out] unsigned long memFreeTotal,
[out] unsigned long memBalloonTotal,
[out] unsigned long memSharedTotal)
cpuUser Percentage of processor time spent in user mode as seen by the guest.
cpuKernel Percentage of processor time spent in kernel mode as seen by the guest.
cpuIdle Percentage of processor time spent idling as seen by the guest.
memTotal Total amount of physical guest RAM.
memFree Free amount of physical guest RAM.
memBalloon Amount of ballooned physical guest RAM.
memShared Amount of shared physical guest RAM.
memCache Total amount of guest (disk) cache memory.
pagedTotal Total amount of space in the page file.
memAllocTotal Total amount of memory allocated by the hypervisor.
memFreeTotal Total amount of free memory available in the hypervisor.
memBalloonTotal Total amount of memory ballooned by the hypervisor.
memSharedTotal Total amount of shared memory in the hypervisor.
Internal method; do not use as it might change at any time.
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5.34.15 setCredentials
void IGuest::setCredentials(
[in] wstring userName,
[in] wstring password,
[in] wstring domain,
[in] boolean allowInteractiveLogon)
userName User name string, can be empty
password Password string, can be empty
domain Domain name (guest logon scheme specific), can be empty
allowInteractiveLogon Flag whether the guest should alternatively allow the user to interactively specify different credentials. This flag might not be supported by all versions of the
Additions.
Store login credentials that can be queried by guest operating systems with Additions installed.
The credentials are transient to the session and the guest may also choose to erase them. Note
that the caller cannot determine whether the guest operating system has queried or made use of
the credentials.
If this method fails, the following error codes may be reported:
• VBOX_E_VM_ERROR: VMM device is not available.
5.34.16 updateGuestAdditions
IProgress IGuest::updateGuestAdditions(
[in] wstring source,
[in] wstring arguments[],
[in] AdditionsUpdateFlag flags[])
source Path to the Guest Additions .ISO file to use for the update.
arguments Optional command line arguments to use for the Guest Additions installer. Useful
for retrofitting features which weren’t installed before on the guest.
flags AdditionsUpdateFlag flags.
Automatically updates already installed Guest Additions in a VM.
At the moment only Windows guests are supported.
Because the VirtualBox Guest Additions drivers are not WHQL-certified yet there might be
warning dialogs during the actual Guest Additions update. These need to be confirmed manually in order to continue the installation process. This applies to Windows 2000 and Windows XP guests and therefore these guests can’t be updated in a fully automated fashion without user interaction. However, to start a Guest Additions update for the mentioned Windows
versions anyway, the flag AdditionsUpdateFlag_WaitForUpdateStartOnly can be specified. See
AdditionsUpdateFlag for more information.
If this method fails, the following error codes may be reported:
• VBOX_E_NOT_SUPPORTED: Guest OS is not supported for automated Guest Additions updates or the already installed Guest Additions are not ready yet.
• VBOX_E_IPRT_ERROR: Error while updating.
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5.35 IGuestDirectory (IDirectory)
Note: This interface extends IDirectory and therefore supports all its methods and
attributes as well.
Implementation of the IDirectory object for directories on the guest.
5.36 IGuestFile (IFile)
Note: This interface extends IFile and therefore supports all its methods and attributes
as well.
Implementation of the IFile object for files on the guest.
5.37 IGuestFileEvent (IGuestSessionEvent)
Note: This interface extends IGuestSessionEvent and therefore supports all its methods
and attributes as well.
Base abstract interface for all guest file events.
5.37.1 Attributes
5.37.1.1 file (read-only)
IGuestFile IGuestFileEvent::file
Guest file object which is related to this event.
5.38 IGuestFileIOEvent (IGuestFileEvent)
Note: This interface extends IGuestFileEvent and therefore supports all its methods
and attributes as well.
Base abstract interface for all guest file input/output (IO) events.
5.38.1 Attributes
5.38.1.1 offset (read-only)
long long IGuestFileIOEvent::offset
Current offset (in bytes).
5.38.1.2 processed (read-only)
unsigned long IGuestFileIOEvent::processed
Processed input or output (in bytes).
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5.39 IGuestFileOffsetChangedEvent (IGuestFileIOEvent)
Note: This interface extends IGuestFileIOEvent and therefore supports all its methods
and attributes as well.
Notification when a guest file changed its current offset.
5.40 IGuestFileReadEvent (IGuestFileIOEvent)
Note: This interface extends IGuestFileIOEvent and therefore supports all its methods
and attributes as well.
Notification when data has been read from a guest file.
5.40.1 Attributes
5.40.1.1 data (read-only)
octet IGuestFileReadEvent::data[]
Actual data read.
5.41 IGuestFileRegisteredEvent (IGuestFileEvent)
Note: This interface extends IGuestFileEvent and therefore supports all its methods
and attributes as well.
Notification when a guest file was registered or unregistered.
5.41.1 Attributes
5.41.1.1 registered (read-only)
boolean IGuestFileRegisteredEvent::registered
If true, the guest file was registered, otherwise it was unregistered.
5.42 IGuestFileStateChangedEvent (IGuestFileEvent)
Note: This interface extends IGuestFileEvent and therefore supports all its methods
and attributes as well.
Notification when a guest file changed its state.
5.42.1 Attributes
5.42.1.1 status (read-only)
FileStatus IGuestFileStateChangedEvent::status
New guest file status.
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5.42.1.2 error (read-only)
IVirtualBoxErrorInfo IGuestFileStateChangedEvent::error
Error information in case of new session status is indicating an error.
The attribute IVirtualBoxErrorInfo::resultDetail will contain the runtime (IPRT) error code
from the guest. See include/iprt/err.h and include/VBox/err.h for details.
5.43 IGuestFileWriteEvent (IGuestFileIOEvent)
Note: This interface extends IGuestFileIOEvent and therefore supports all its methods
and attributes as well.
Notification when data has been written to a guest file.
5.44 IGuestFsObjInfo (IFsObjInfo)
Note: This interface extends IFsObjInfo and therefore supports all its methods and
attributes as well.
Represents the guest implementation of the IFsObjInfo object.
5.45 IGuestKeyboardEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when guest keyboard event happens.
5.45.1 Attributes
5.45.1.1 scancodes (read-only)
long IGuestKeyboardEvent::scancodes[]
Array of scancodes.
5.46 IGuestMonitorChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when the guest enables one of its monitors.
5.46.1 Attributes
5.46.1.1 changeType (read-only)
GuestMonitorChangedEventType IGuestMonitorChangedEvent::changeType
What was changed for this guest monitor.
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5.46.1.2 screenId (read-only)
unsigned long IGuestMonitorChangedEvent::screenId
The monitor which was changed.
5.46.1.3 originX (read-only)
unsigned long IGuestMonitorChangedEvent::originX
Physical X origin relative to the primary screen. Valid for Enabled and NewOrigin.
5.46.1.4 originY (read-only)
unsigned long IGuestMonitorChangedEvent::originY
Physical Y origin relative to the primary screen. Valid for Enabled and NewOrigin.
5.46.1.5 width (read-only)
unsigned long IGuestMonitorChangedEvent::width
Width of the screen. Valid for Enabled.
5.46.1.6 height (read-only)
unsigned long IGuestMonitorChangedEvent::height
Height of the screen. Valid for Enabled.
5.47 IGuestMouseEvent (IReusableEvent)
Note: This interface extends IReusableEvent and therefore supports all its methods and
attributes as well.
Notification when guest mouse event happens.
5.47.1 Attributes
5.47.1.1 mode (read-only)
GuestMouseEventMode IGuestMouseEvent::mode
If this event is relative, absolute or multi-touch.
5.47.1.2 x (read-only)
long IGuestMouseEvent::x
New X position, or X delta.
5.47.1.3 y (read-only)
long IGuestMouseEvent::y
New Y position, or Y delta.
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5.47.1.4 z (read-only)
long IGuestMouseEvent::z
Z delta.
5.47.1.5 w (read-only)
long IGuestMouseEvent::w
W delta.
5.47.1.6 buttons (read-only)
long IGuestMouseEvent::buttons
Button state bitmask.
5.48 IGuestMultiTouchEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when guest touch screen event happens.
5.48.1 Attributes
5.48.1.1 contactCount (read-only)
long IGuestMultiTouchEvent::contactCount
Number of contacts in the event.
5.48.1.2 xPositions (read-only)
short IGuestMultiTouchEvent::xPositions[]
X positions.
5.48.1.3 yPositions (read-only)
short IGuestMultiTouchEvent::yPositions[]
Y positions.
5.48.1.4 contactIds (read-only)
unsigned short IGuestMultiTouchEvent::contactIds[]
Contact identifiers.
5.48.1.5 contactFlags (read-only)
unsigned short IGuestMultiTouchEvent::contactFlags[]
Contact state. Bit 0: in contact. Bit 1: in range.
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5.48.1.6 scanTime (read-only)
unsigned long IGuestMultiTouchEvent::scanTime
Timestamp of the event in milliseconds. Only relative time between events is important.
5.49 IGuestOSType
Note: With the web service, this interface is mapped to a structure. Attributes that
return this interface will not return an object, but a complete structure containing the
attributes listed below as structure members.
5.49.1 Attributes
5.49.1.1 familyId (read-only)
wstring IGuestOSType::familyId
Guest OS family identifier string.
5.49.1.2 familyDescription (read-only)
wstring IGuestOSType::familyDescription
Human readable description of the guest OS family.
5.49.1.3 id (read-only)
wstring IGuestOSType::id
Guest OS identifier string.
5.49.1.4 description (read-only)
wstring IGuestOSType::description
Human readable description of the guest OS.
5.49.1.5 is64Bit (read-only)
boolean IGuestOSType::is64Bit
Returns true if the given OS is 64-bit
5.49.1.6 recommendedIOAPIC (read-only)
boolean IGuestOSType::recommendedIOAPIC
Returns true if IO APIC recommended for this OS type.
5.49.1.7 recommendedVirtEx (read-only)
boolean IGuestOSType::recommendedVirtEx
Returns true if VT-x or AMD-V recommended for this OS type.
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5.49.1.8 recommendedRAM (read-only)
unsigned long IGuestOSType::recommendedRAM
Recommended RAM size in Megabytes.
5.49.1.9 recommendedVRAM (read-only)
unsigned long IGuestOSType::recommendedVRAM
Recommended video RAM size in Megabytes.
5.49.1.10 recommended2DVideoAcceleration (read-only)
boolean IGuestOSType::recommended2DVideoAcceleration
Returns true if 2D video acceleration is recommended for this OS type.
5.49.1.11 recommended3DAcceleration (read-only)
boolean IGuestOSType::recommended3DAcceleration
Returns true if 3D acceleration is recommended for this OS type.
5.49.1.12 recommendedHDD (read-only)
long long IGuestOSType::recommendedHDD
Recommended hard disk size in bytes.
5.49.1.13 adapterType (read-only)
NetworkAdapterType IGuestOSType::adapterType
Returns recommended network adapter for this OS type.
5.49.1.14 recommendedPAE (read-only)
boolean IGuestOSType::recommendedPAE
Returns true if using PAE is recommended for this OS type.
5.49.1.15 recommendedDVDStorageController (read-only)
StorageControllerType IGuestOSType::recommendedDVDStorageController
Recommended storage controller type for DVD/CD drives.
5.49.1.16 recommendedDVDStorageBus (read-only)
StorageBus IGuestOSType::recommendedDVDStorageBus
Recommended storage bus type for DVD/CD drives.
5.49.1.17 recommendedHDStorageController (read-only)
StorageControllerType IGuestOSType::recommendedHDStorageController
Recommended storage controller type for HD drives.
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5.49.1.18 recommendedHDStorageBus (read-only)
StorageBus IGuestOSType::recommendedHDStorageBus
Recommended storage bus type for HD drives.
5.49.1.19 recommendedFirmware (read-only)
FirmwareType IGuestOSType::recommendedFirmware
Recommended firmware type.
5.49.1.20 recommendedUSBHID (read-only)
boolean IGuestOSType::recommendedUSBHID
Returns true if using USB Human Interface Devices, such as keyboard and mouse recommended.
5.49.1.21 recommendedHPET (read-only)
boolean IGuestOSType::recommendedHPET
Returns true if using HPET is recommended for this OS type.
5.49.1.22 recommendedUSBTablet (read-only)
boolean IGuestOSType::recommendedUSBTablet
Returns true if using a USB Tablet is recommended.
5.49.1.23 recommendedRTCUseUTC (read-only)
boolean IGuestOSType::recommendedRTCUseUTC
Returns true if the RTC of this VM should be set to UTC
5.49.1.24 recommendedChipset (read-only)
ChipsetType IGuestOSType::recommendedChipset
Recommended chipset type.
5.49.1.25 recommendedAudioController (read-only)
AudioControllerType IGuestOSType::recommendedAudioController
Recommended audio type.
5.49.1.26 recommendedFloppy (read-only)
boolean IGuestOSType::recommendedFloppy
Returns true a floppy drive is recommended for this OS type.
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5.49.1.27 recommendedUSB (read-only)
boolean IGuestOSType::recommendedUSB
Returns true a USB controller is recommended for this OS type.
5.50 IGuestProcess (IProcess)
Note: This interface extends IProcess and therefore supports all its methods and attributes as well.
Implementation of the IProcess object for processes on the guest.
5.51 IGuestProcessEvent (IGuestSessionEvent)
Note: This interface extends IGuestSessionEvent and therefore supports all its methods
and attributes as well.
Base abstract interface for all guest process events.
5.51.1 Attributes
5.51.1.1 process (read-only)
IGuestProcess IGuestProcessEvent::process
Guest process object which is related to this event.
5.51.1.2 pid (read-only)
unsigned long IGuestProcessEvent::pid
Guest process ID (PID).
5.52 IGuestProcessIOEvent (IGuestProcessEvent)
Note: This interface extends IGuestProcessEvent and therefore supports all its methods
and attributes as well.
Base abstract interface for all guest process input/output (IO) events.
5.52.1 Attributes
5.52.1.1 handle (read-only)
unsigned long IGuestProcessIOEvent::handle
Input/output (IO) handle involved in this event. Usually 0 is stdin, 1 is stdout and 2 is stderr.
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5.52.1.2 processed (read-only)
unsigned long IGuestProcessIOEvent::processed
Processed input or output (in bytes).
5.53 IGuestProcessInputNotifyEvent
(IGuestProcessIOEvent)
Note: This interface extends IGuestProcessIOEvent and therefore supports all its methods and attributes as well.
Notification when a guest process’ stdin became available.
Note: This event is right now not implemented!
5.53.1 Attributes
5.53.1.1 status (read-only)
ProcessInputStatus IGuestProcessInputNotifyEvent::status
Current process input status.
5.54 IGuestProcessOutputEvent (IGuestProcessIOEvent)
Note: This interface extends IGuestProcessIOEvent and therefore supports all its methods and attributes as well.
Notification when there is guest process output available for reading.
5.54.1 Attributes
5.54.1.1 data (read-only)
octet IGuestProcessOutputEvent::data[]
Actual output data.
5.55 IGuestProcessRegisteredEvent (IGuestProcessEvent)
Note: This interface extends IGuestProcessEvent and therefore supports all its methods
and attributes as well.
Notification when a guest process was registered or unregistered.
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5.55.1 Attributes
5.55.1.1 registered (read-only)
boolean IGuestProcessRegisteredEvent::registered
If true, the guest process was registered, otherwise it was unregistered.
5.56 IGuestProcessStateChangedEvent
(IGuestProcessEvent)
Note: This interface extends IGuestProcessEvent and therefore supports all its methods
and attributes as well.
Notification when a guest process changed its state.
5.56.1 Attributes
5.56.1.1 status (read-only)
ProcessStatus IGuestProcessStateChangedEvent::status
New guest process status.
5.56.1.2 error (read-only)
IVirtualBoxErrorInfo IGuestProcessStateChangedEvent::error
Error information in case of new session status is indicating an error.
The attribute IVirtualBoxErrorInfo::resultDetail will contain the runtime (IPRT) error code
from the guest. See include/iprt/err.h and include/VBox/err.h for details.
5.57 IGuestPropertyChangedEvent (IMachineEvent)
Note: This interface extends IMachineEvent and therefore supports all its methods and
attributes as well.
Notification when a guest property has changed.
5.57.1 Attributes
5.57.1.1 name (read-only)
wstring IGuestPropertyChangedEvent::name
The name of the property that has changed.
5.57.1.2 value (read-only)
wstring IGuestPropertyChangedEvent::value
The new property value.
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5.57.1.3 flags (read-only)
wstring IGuestPropertyChangedEvent::flags
The new property flags.
5.58 IGuestSession
A guest session represents one impersonated user account on the guest, so every operation will
use the same credentials specified when creating the session object via IGuest::createSession().
There can be a maximum of 32 sessions at once per VM, whereas session 0 is reserved for
the root session. This root session is controlling all other guest sessions and also is responsible
for actions which require system level privileges. Each guest session keeps track of its started
guest processes, opened guest files or guest directories. To work on guest files or directories a
guest session offers methods to open or create such objects (see fileOpen() or directoryOpen()
for example).
When done with either of these objects, including the guest session itself, use the appropriate
close() method to let the object do its cleanup work.
Every guest session has its own environment variable block which gets automatically applied
when starting a new guest process via processCreate() or processCreateEx(). To override (or
unset) certain environment variables already set by the guest session, one can specify a perprocess environment block when using one of the both above mentioned process creation calls.
5.58.1 Attributes
5.58.1.1 user (read-only)
wstring IGuestSession::user
Returns the user name used by this session to impersonate users on the guest.
5.58.1.2 domain (read-only)
wstring IGuestSession::domain
Returns the domain name used by this session to impersonate users on the guest.
5.58.1.3 name (read-only)
wstring IGuestSession::name
Returns the session’s friendly name.
5.58.1.4 id (read-only)
unsigned long IGuestSession::id
Returns the internal session ID.
5.58.1.5 timeout (read/write)
unsigned long IGuestSession::timeout
Returns the session timeout (in ms).
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5.58.1.6 protocolVersion (read-only)
unsigned long IGuestSession::protocolVersion
Returns the protocol version which is used by this session to communicate with the guest.
5.58.1.7 status (read-only)
GuestSessionStatus IGuestSession::status
Returns the current session status.
5.58.1.8 environment (read/write)
wstring IGuestSession::environment[]
Returns the current session environment.
5.58.1.9 processes (read-only)
IGuestProcess IGuestSession::processes[]
Returns all current guest processes.
5.58.1.10 directories (read-only)
IGuestDirectory IGuestSession::directories[]
Returns all currently opened guest directories.
5.58.1.11 files (read-only)
IGuestFile IGuestSession::files[]
Returns all currently opened guest files.
5.58.1.12 eventSource (read-only)
IEventSource IGuestSession::eventSource
Event source for guest session events.
5.58.2 close
void IGuestSession::close()
Closes this session. All opened guest directories, files and processes which are not referenced
by clients anymore will be closed. Guest processes which fall into this category and still are
running on the guest will be terminated automatically.
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5.58.3 copyFrom
IProgress IGuestSession::copyFrom(
[in] wstring source,
[in] wstring dest,
[in] CopyFileFlag flags[])
source Source file on the guest to copy to the host.
dest Destination file name on the host.
flags Copy flags; see CopyFileFlag for more information.
Copies a file from guest to the host.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Error starting the copy operation.
5.58.4 copyTo
IProgress IGuestSession::copyTo(
[in] wstring source,
[in] wstring dest,
[in] CopyFileFlag flags[])
source Source file on the host to copy to the guest.
dest Destination file name on the guest.
flags Copy flags; see CopyFileFlag for more information.
Copies a file from host to the guest.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Error starting the copy operation.
5.58.5 directoryCreate
void IGuestSession::directoryCreate(
[in] wstring path,
[in] unsigned long mode,
[in] DirectoryCreateFlag flags[])
path Full path of directory to create.
mode File creation mode.
flags Creation flags; see DirectoryCreateFlag for more information.
Create a directory on the guest.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Error while creating the directory.
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5.58.6 directoryCreateTemp
wstring IGuestSession::directoryCreateTemp(
[in] wstring templateName,
[in] unsigned long mode,
[in] wstring path,
[in] boolean secure)
templateName Template for the name of the directory to create. This must contain at least one
’X’ character. The first group of consecutive ’X’ characters in the template will be replaced
by a random alphanumeric string to produce a unique name.
mode The mode of the directory to create. Use 0700 unless there are reasons not to. This
parameter is ignored if “secure” is specified.
path The absolute path to create the temporary directory in.
secure Whether to fail if the directory can not be securely created. Currently this means that
another unprivileged user cannot manipulate the path specified or remove the temporary
directory after it has been created. Also causes the mode specified to be ignored. May not
be supported on all guest types.
Create a temporary directory on the guest.
If this method fails, the following error codes may be reported:
• VBOX_E_NOT_SUPPORTED: The operation is not possible as requested on this particular
guest type.
• E_INVALIDARG: Invalid argument. This includes an incorrectly formatted template, or a
non-absolute path.
• VBOX_E_IPRT_ERROR: The temporary directory could not be created. Possible reasons
include a non-existing path or an insecure path when the secure option was requested.
5.58.7 directoryExists
boolean IGuestSession::directoryExists(
[in] wstring path)
path Directory to check existence for.
Checks whether a directory exists on the guest or not.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Error while checking existence of the directory specified.
5.58.8 directoryOpen
IGuestDirectory
[in]
[in]
[in]
IGuestSession::directoryOpen(
wstring path,
wstring filter,
DirectoryOpenFlag flags[])
path Full path to file to open.
filter Open filter to apply. This can include wildcards like ? and *.
flags Open flags; see DirectoryOpenFlag for more information.
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Opens a directory and creates a IGuestDirectory object that can be used for further operations.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: Directory to open was not found.
• VBOX_E_IPRT_ERROR: Error while opening the directory.
5.58.9 directoryQueryInfo
IGuestFsObjInfo IGuestSession::directoryQueryInfo(
[in] wstring path)
path Directory to query information for.
Queries information of a directory on the guest.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: Directory to query information for was not found.
• VBOX_E_IPRT_ERROR: Error querying information.
5.58.10 directoryRemove
void IGuestSession::directoryRemove(
[in] wstring path)
path Full path of directory to remove.
Removes a guest directory if not empty.
5.58.11 directoryRemoveRecursive
IProgress IGuestSession::directoryRemoveRecursive(
[in] wstring path,
[in] DirectoryRemoveRecFlag flags[])
path Full path of directory to remove recursively.
flags Remove flags; see DirectoryRemoveRecFlag for more information.
Removes a guest directory recursively.
5.58.12 directoryRename
void IGuestSession::directoryRename(
[in] wstring source,
[in] wstring dest,
[in] PathRenameFlag flags[])
source Source directory to rename.
dest Destination directory to rename the source to.
flags Rename flags; see PathRenameFlag for more information.
Renames a directory on the guest.
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5.58.13 directorySetACL
void IGuestSession::directorySetACL(
[in] wstring path,
[in] wstring acl)
path Full path of directory to set the ACL for.
acl Actual ACL string to set. Must comply with the guest OS.
Sets the ACL (Access Control List) of a guest directory.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The method is not implemented yet.
5.58.14 environmentClear
void IGuestSession::environmentClear()
Clears (deletes) all session environment variables.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Error while clearing the session environment variables.
5.58.15 environmentGet
wstring IGuestSession::environmentGet(
[in] wstring name)
name Name of session environment variable to get the value for.
Gets the value of a session environment variable.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Error while getting the value of the session environment variable.
5.58.16 environmentSet
void IGuestSession::environmentSet(
[in] wstring name,
[in] wstring value)
name Name of session environment variable to set.
value Value to set the session environment variable to.
Sets a session environment variable.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Error while setting the session environment variable.
5.58.17 environmentUnset
void IGuestSession::environmentUnset(
[in] wstring name)
name Name of session environment variable to unset (clear).
Unsets a session environment variable.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Error while unsetting the session environment variable.
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5.58.18 fileCreateTemp
IGuestFile IGuestSession::fileCreateTemp(
[in] wstring templateName,
[in] unsigned long mode,
[in] wstring path,
[in] boolean secure)
templateName Template for the name of the file to create. This must contain at least one ’X’
character. The first group of consecutive ’X’ characters in the template will be replaced by
a random alphanumeric string to produce a unique name.
mode The mode of the file to create. Use 0700 unless there are reasons not to. This parameter
is ignored if “secure” is specified.
path The absolute path to create the temporary file in.
secure Whether to fail if the file can not be securely created. Currently this means that another
unprivileged user cannot manipulate the path specified or remove the temporary file after
it has been created. Also causes the mode specified to be ignored. May not be supported
on all guest types.
Creates a temporary file on the guest.
If this method fails, the following error codes may be reported:
• VBOX_E_NOT_SUPPORTED: The operation is not possible as requested on this particular
guest type.
• E_INVALIDARG: Invalid argument. This includes an incorrectly formatted template, or a
non-absolute path.
• VBOX_E_IPRT_ERROR: The temporary file could not be created. Possible reasons include
a non-existing path or an insecure path when the secure option was requested.
5.58.19 fileExists
boolean IGuestSession::fileExists(
[in] wstring path)
path File to check existence for.
Checks whether a file exists on the guest or not.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Error while checking existence of the file specified.
5.58.20 fileOpen
IGuestFile IGuestSession::fileOpen(
[in] wstring path,
[in] wstring openMode,
[in] wstring disposition,
[in] unsigned long creationMode)
path Full path to file to open.
openMode The file opening mode. This describes the wanted access to a file, whereas the
parameter must be one of the following:
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• "r": Opens a file for reading.
• "r+": Opens a file for reading and writing.
• "w": Opens a file for writing.
• "w+": Opens a file for writing and reading.
disposition The file disposition. This describes the action to take in case a file exists or does
not exist, whereas the parameter must be one of the following:
• "ca": Creates a new file, always. Overwrites an existing file.
• "ce": Creates a new file if it does not exist. Fail if exist.
• "oa": Opens an existing file and places the file pointer at the end of the file, if opened
with write access. Create the file if it does not exist.
• "oc": Opens an existing file or create it if it does not exist.
• "oe": Opens an existing file or fail if it does not exist.
• "ot": Opens and truncate an existing file or fail if it does not exist.
creationMode The mode to create the file with. Must be a three-digit octal number which
represents the access rights for the file.
Opens a file and creates a IGuestFile object that can be used for further operations.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: File to open was not found.
• VBOX_E_IPRT_ERROR: Error while opening the file.
5.58.21 fileOpenEx
IGuestFile IGuestSession::fileOpenEx(
[in] wstring path,
[in] wstring openMode,
[in] wstring disposition,
[in] wstring sharingMode,
[in] unsigned long creationMode,
[in] long long offset)
path Full path to file to open.
openMode The file opening mode. This describes the wanted access to a file, whereas the
parameter must be one of the following:
• "r": Opens a file for reading.
• "r+": Opens a file for reading and writing.
• "w": Opens a file for writing.
• "w+": Opens a file for writing and reading.
disposition The file disposition. This describes the action to take in case a file exists or does
not exist, whereas the parameter must be one of the following:
• "ca": Creates a new file, always. Overwrites an existing file.
• "ce": Creates a new file if it does not exist. Fail if exist.
• "oa": Opens an existing file and places the file pointer at the end of the file, if opened
with write access. Create the file if it does not exist.
• "oc": Opens an existing file or create it if it does not exist.
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• "oe": Opens an existing file or fail if it does not exist.
• "ot": Opens and truncate an existing file or fail if it does not exist.
sharingMode The file sharing mode on the guest. This parameter is not implemented yet. Pass
an empty string here.
creationMode The mode to create the file with. Must be a three-digit octal number which
represents the access rights for the file.
offset The initial read/write offset (in bytes).
Opens a file and creates a IGuestFile object that can be used for further operations, extended
version.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: File to open was not found.
• VBOX_E_IPRT_ERROR: Error while opening the file.
5.58.22 fileQueryInfo
IGuestFsObjInfo IGuestSession::fileQueryInfo(
[in] wstring path)
path File to query information for.
Queries information of a file on the guest.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: File to query information for was not found.
• VBOX_E_IPRT_ERROR: Error querying information.
5.58.23 fileQuerySize
long long IGuestSession::fileQuerySize(
[in] wstring path)
path File to query the size for.
Queries the size of a file on the guest.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: File to rename was not found.
• VBOX_E_IPRT_ERROR: Error querying file size.
5.58.24 fileRemove
void IGuestSession::fileRemove(
[in] wstring path)
path Path to the file to remove.
Removes a single file on the guest.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: File to remove was not found.
• VBOX_E_IPRT_ERROR: Error while removing the file.
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5.58.25 fileRename
void IGuestSession::fileRename(
[in] wstring source,
[in] wstring dest,
[in] PathRenameFlag flags[])
source Source file to rename.
dest Destination file to rename the source to.
flags Rename flags; see PathRenameFlag for more information.
Renames a file on the guest.
5.58.26 fileSetACL
void IGuestSession::fileSetACL(
[in] wstring file,
[in] wstring acl)
file Full path of file to set the ACL for.
acl Actual ACL string to set. Must comply with the guest OS.
Sets the ACL (Access Control List) of a file on the guest.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The method is not implemented yet.
5.58.27 processCreate
IGuestProcess IGuestSession::processCreate(
[in] wstring command,
[in] wstring arguments[],
[in] wstring environment[],
[in] ProcessCreateFlag flags[],
[in] unsigned long timeoutMS)
command Full path name of the command to execute on the guest; the commands has to exists
in the guest VM in order to be executed.
arguments Array of arguments passed to the execution command.
environment Environment variables that can be set while the command is being executed, in
form of “NAME=VALUE”; one pair per entry. To unset a variable just set its name (“NAME”)
without a value.This parameter can be used to override environment variables set by the
guest session, which will be applied to the newly started process in any case.
flags Process creation flags; see ProcessCreateFlag for more information.
timeoutMS Timeout (in ms) for limiting the guest process’ running time. Pass 0 for an infinite timeout. On timeout the guest process will be killed and its status will be put to an
appropriate value. See ProcessStatus for more information.
Creates a new process running on the guest. The new process will be started asynchronously,
meaning on return of this function it is not guaranteed that the guest process is in a started state.
To wait for successful startup, use the IProcess::waitFor() call.
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Note: Starting at VirtualBox 4.2 guest process execution by default is limited to serve
up to 255 guest processes at a time. If all 255 guest processes are still active and
running, creating a new guest process will result in an appropriate error message.
If ProcessCreateFlag_WaitForStdOut and / or respectively ProcessCreateFlag_WaitForStdErr is / are set, the guest process will not exit until all data
from the specified stream(s) is / are read out.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Error creating guest process.
5.58.28 processCreateEx
IGuestProcess IGuestSession::processCreateEx(
[in] wstring command,
[in] wstring arguments[],
[in] wstring environment[],
[in] ProcessCreateFlag flags[],
[in] unsigned long timeoutMS,
[in] ProcessPriority priority,
[in] long affinity[])
command Full path name of the command to execute on the guest; the commands has to exists
in the guest VM in order to be executed.
arguments Array of arguments passed to the execution command.
environment Environment variables that can be set while the command is being executed, in
form of “NAME=VALUE”; one pair per entry. To unset a variable just set its name (“NAME”)
without a value.This parameter can be used to override environment variables set by the
guest session, which will be applied to the newly started process in any case.
flags Process creation flags; see ProcessCreateFlag for more information.
timeoutMS Timeout (in ms) for limiting the guest process’ running time. Pass 0 for an infinite timeout. On timeout the guest process will be killed and its status will be put to an
appropriate value. See ProcessStatus for more information.
priority Process priority to use for execution; see see ProcessPriority for more information.
affinity Process affinity to use for execution. This parameter is not implemented yet.
Creates a new process running on the guest. Extended version for also setting the process priority
and affinity.See processCreate() for more information.
5.58.29 processGet
IGuestProcess IGuestSession::processGet(
[in] unsigned long pid)
pid Process ID (PID) to get guest process for.
Gets a certain guest process by its process ID (PID).
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5.58.30 symlinkCreate
void IGuestSession::symlinkCreate(
[in] wstring source,
[in] wstring target,
[in] SymlinkType type)
source The name of the symbolic link.
target The path to the symbolic link target.
type The symbolic link type; see SymlinkReadFlag for more information.
Creates a symbolic link on the guest.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The method is not implemented yet.
5.58.31 symlinkExists
boolean IGuestSession::symlinkExists(
[in] wstring symlink)
symlink Symbolic link to check existence for.
Checks whether a symbolic link exists on the guest or not.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The method is not implemented yet.
5.58.32 symlinkRead
wstring IGuestSession::symlinkRead(
[in] wstring symlink,
[in] SymlinkReadFlag flags[])
symlink Full path to symbolic link to read.
flags Read flags; see SymlinkReadFlag for more information.
Reads a symbolic link on the guest.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The method is not implemented yet.
5.58.33 symlinkRemoveDirectory
void IGuestSession::symlinkRemoveDirectory(
[in] wstring path)
path Symbolic link to remove.
Removes a symbolic link on the guest if it’s a directory.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The method is not implemented yet.
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5.58.34 symlinkRemoveFile
void IGuestSession::symlinkRemoveFile(
[in] wstring file)
file Symbolic link to remove.
Removes a symbolic link on the guest if it’s a file.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The method is not implemented yet.
5.58.35 waitFor
GuestSessionWaitResult IGuestSession::waitFor(
[in] unsigned long waitFor,
[in] unsigned long timeoutMS)
waitFor Specifies what to wait for; see GuestSessionWaitForFlag for more information.
timeoutMS Timeout (in ms) to wait for the operation to complete. Pass 0 for an infinite timeout.
Waits for one more events to happen.
5.58.36 waitForArray
GuestSessionWaitResult IGuestSession::waitForArray(
[in] GuestSessionWaitForFlag waitFor[],
[in] unsigned long timeoutMS)
waitFor Specifies what to wait for; see GuestSessionWaitForFlag for more information.
timeoutMS Timeout (in ms) to wait for the operation to complete. Pass 0 for an infinite timeout.
Waits for one more events to happen. Scriptable version of waitFor().
5.59 IGuestSessionEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Base abstract interface for all guest session events.
5.59.1 Attributes
5.59.1.1 session (read-only)
IGuestSession IGuestSessionEvent::session
Guest session that is subject to change.
5.60 IGuestSessionRegisteredEvent (IGuestSessionEvent)
Note: This interface extends IGuestSessionEvent and therefore supports all its methods
and attributes as well.
Notification when a guest session was registered or unregistered.
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5.60.1 Attributes
5.60.1.1 registered (read-only)
boolean IGuestSessionRegisteredEvent::registered
If true, the guest session was registered, otherwise it was unregistered.
5.61 IGuestSessionStateChangedEvent
(IGuestSessionEvent)
Note: This interface extends IGuestSessionEvent and therefore supports all its methods
and attributes as well.
Notification when a guest session changed its state.
5.61.1 Attributes
5.61.1.1 id (read-only)
unsigned long IGuestSessionStateChangedEvent::id
Session ID of guest session which was changed.
5.61.1.2 status (read-only)
GuestSessionStatus IGuestSessionStateChangedEvent::status
New session status.
5.61.1.3 error (read-only)
IVirtualBoxErrorInfo IGuestSessionStateChangedEvent::error
Error information in case of new session status is indicating an error.
The attribute IVirtualBoxErrorInfo::resultDetail will contain the runtime (IPRT) error code
from the guest. See include/iprt/err.h and include/VBox/err.h for details.
5.62 IGuestUserStateChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when a guest user changed its state.
5.62.1 Attributes
5.62.1.1 name (read-only)
wstring IGuestUserStateChangedEvent::name
Name of the guest user whose state changed.
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5.62.1.2 domain (read-only)
wstring IGuestUserStateChangedEvent::domain
Name of the FQDN (fully qualified domain name) this user is bound to. Optional.
5.62.1.3 state (read-only)
GuestUserState IGuestUserStateChangedEvent::state
What was changed for this guest user. See GuestUserState for more information.
5.62.1.4 stateDetails (read-only)
wstring IGuestUserStateChangedEvent::stateDetails
Optional state details, depending on the state attribute.
5.63 IHost
The IHost interface represents the physical machine that this VirtualBox installation runs on.
An object implementing this interface is returned by the IVirtualBox::host attribute. This interface contains read-only information about the host’s physical hardware (such as what processors
and disks are available, what the host operating system is, and so on) and also allows for manipulating some of the host’s hardware, such as global USB device filters and host interface
networking.
5.63.1 Attributes
5.63.1.1 DVDDrives (read-only)
IMedium IHost::DVDDrives[]
List of DVD drives available on the host.
5.63.1.2 floppyDrives (read-only)
IMedium IHost::floppyDrives[]
List of floppy drives available on the host.
5.63.1.3 USBDevices (read-only)
IHostUSBDevice IHost::USBDevices[]
List of USB devices currently attached to the host. Once a new device is physically attached to
the host computer, it appears in this list and remains there until detached.
Note: If USB functionality is not available in the given edition of VirtualBox, this
method will set the result code to E_NOTIMPL.
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5.63.1.4 USBDeviceFilters (read-only)
IHostUSBDeviceFilter IHost::USBDeviceFilters[]
List of USB device filters in action. When a new device is physically attached to the host
computer, filters from this list are applied to it (in order they are stored in the list). The first
matched filter will determine the action performed on the device.
Unless the device is ignored by these filters, filters of all currently running virtual machines
(IUSBDeviceFilters::deviceFilters[]) are applied to it.
Note: If USB functionality is not available in the given edition of VirtualBox, this
method will set the result code to E_NOTIMPL.
See also: IHostUSBDeviceFilter, USBDeviceState
5.63.1.5 networkInterfaces (read-only)
IHostNetworkInterface IHost::networkInterfaces[]
List of host network interfaces currently defined on the host.
5.63.1.6 nameServers (read-only)
wstring IHost::nameServers[]
The list of nameservers registered in host’s name resolving system.
5.63.1.7 domainName (read-only)
wstring IHost::domainName
Domain name used for name resolving.
5.63.1.8 searchStrings (read-only)
wstring IHost::searchStrings[]
Search string registered for name resolving.
5.63.1.9 processorCount (read-only)
unsigned long IHost::processorCount
Number of (logical) CPUs installed in the host system.
5.63.1.10 processorOnlineCount (read-only)
unsigned long IHost::processorOnlineCount
Number of (logical) CPUs online in the host system.
5.63.1.11 processorCoreCount (read-only)
unsigned long IHost::processorCoreCount
Number of physical processor cores installed in the host system.
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5.63.1.12 processorOnlineCoreCount (read-only)
unsigned long IHost::processorOnlineCoreCount
Number of physical processor cores online in the host system.
5.63.1.13 memorySize (read-only)
unsigned long IHost::memorySize
Amount of system memory in megabytes installed in the host system.
5.63.1.14 memoryAvailable (read-only)
unsigned long IHost::memoryAvailable
Available system memory in the host system.
5.63.1.15 operatingSystem (read-only)
wstring IHost::operatingSystem
Name of the host system’s operating system.
5.63.1.16 OSVersion (read-only)
wstring IHost::OSVersion
Host operating system’s version string.
5.63.1.17 UTCTime (read-only)
long long IHost::UTCTime
Returns the current host time in milliseconds since 1970-01-01 UTC.
5.63.1.18 acceleration3DAvailable (read-only)
boolean IHost::acceleration3DAvailable
Returns true when the host supports 3D hardware acceleration.
5.63.1.19 videoInputDevices (read-only)
IHostVideoInputDevice IHost::videoInputDevices[]
List of currently available host video capture devices.
5.63.2 createHostOnlyNetworkInterface
IProgress IHost::createHostOnlyNetworkInterface(
[out] IHostNetworkInterface hostInterface)
hostInterface Created host interface object.
Creates a new adapter for Host Only Networking.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Host network interface name already exists.
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5.63.3 createUSBDeviceFilter
IHostUSBDeviceFilter IHost::createUSBDeviceFilter(
[in] wstring name)
name Filter name. See IUSBDeviceFilter::name for more information.
Creates a new USB device filter. All attributes except the filter name are set to empty (any
match), active is false (the filter is not active).
The created filter can be added to the list of filters using insertUSBDeviceFilter().
See also: USBDeviceFilters[]
5.63.4 findHostDVDDrive
IMedium IHost::findHostDVDDrive(
[in] wstring name)
name Name of the host drive to search for
Searches for a host DVD drive with the given name.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: Given name does not correspond to any host drive.
5.63.5 findHostFloppyDrive
IMedium IHost::findHostFloppyDrive(
[in] wstring name)
name Name of the host floppy drive to search for
Searches for a host floppy drive with the given name.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: Given name does not correspond to any host floppy drive.
5.63.6 findHostNetworkInterfaceById
IHostNetworkInterface IHost::findHostNetworkInterfaceById(
[in] uuid id)
id GUID of the host network interface to search for.
Searches through all host network interfaces for an interface with the given GUID.
Note: The method returns an error if the given GUID does not correspond to any host
network interface.
5.63.7 findHostNetworkInterfaceByName
IHostNetworkInterface IHost::findHostNetworkInterfaceByName(
[in] wstring name)
name Name of the host network interface to search for.
Searches through all host network interfaces for an interface with the given name.
Note: The method returns an error if the given name does not correspond to any host
network interface.
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5.63.8 findHostNetworkInterfacesOfType
IHostNetworkInterface[] IHost::findHostNetworkInterfacesOfType(
[in] HostNetworkInterfaceType type)
type type of the host network interfaces to search for.
Searches through all host network interfaces and returns a list of interfaces of the specified
type
5.63.9 findUSBDeviceByAddress
IHostUSBDevice IHost::findUSBDeviceByAddress(
[in] wstring name)
name Address of the USB device (as assigned by the host) to search for.
Searches for a USB device with the given host address.
See also: IUSBDevice::address
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: Given name does not correspond to any USB device.
5.63.10 findUSBDeviceById
IHostUSBDevice IHost::findUSBDeviceById(
[in] uuid id)
id UUID of the USB device to search for.
Searches for a USB device with the given UUID.
See also: IUSBDevice::id
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: Given id does not correspond to any USB device.
5.63.11 generateMACAddress
wstring IHost::generateMACAddress()
Generates a valid Ethernet MAC address, 12 hexadecimal characters.
5.63.12 getProcessorCPUIDLeaf
void IHost::getProcessorCPUIDLeaf(
[in] unsigned long cpuId,
[in] unsigned long leaf,
[in] unsigned long subLeaf,
[out] unsigned long valEax,
[out] unsigned long valEbx,
[out] unsigned long valEcx,
[out] unsigned long valEdx)
cpuId Identifier of the CPU. The CPU most be online.
Note: The current implementation might not necessarily return the description for this
exact CPU.
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leaf CPUID leaf index (eax).
subLeaf CPUID leaf sub index (ecx). This currently only applies to cache information on Intel
CPUs. Use 0 if retrieving values for IMachine::setCPUIDLeaf().
valEax CPUID leaf value for register eax.
valEbx CPUID leaf value for register ebx.
valEcx CPUID leaf value for register ecx.
valEdx CPUID leaf value for register edx.
Returns the CPU cpuid information for the specified leaf.
5.63.13 getProcessorDescription
wstring IHost::getProcessorDescription(
[in] unsigned long cpuId)
cpuId Identifier of the CPU.
Note: The current implementation might not necessarily return the description for this
exact CPU.
Query the model string of a specified host CPU.
5.63.14 getProcessorFeature
boolean IHost::getProcessorFeature(
[in] ProcessorFeature feature)
feature CPU Feature identifier.
Query whether a CPU feature is supported or not.
5.63.15 getProcessorSpeed
unsigned long IHost::getProcessorSpeed(
[in] unsigned long cpuId)
cpuId Identifier of the CPU.
Query the (approximate) maximum speed of a specified host CPU in Megahertz.
5.63.16 insertUSBDeviceFilter
void IHost::insertUSBDeviceFilter(
[in] unsigned long position,
[in] IHostUSBDeviceFilter filter)
position Position to insert the filter to.
filter USB device filter to insert.
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Inserts the given USB device to the specified position in the list of filters.
Positions are numbered starting from 0. If the specified position is equal to or greater than the
number of elements in the list, the filter is added at the end of the collection.
Note: Duplicates are not allowed, so an attempt to insert a filter already in the list is
an error.
Note: If USB functionality is not available in the given edition of VirtualBox, this
method will set the result code to E_NOTIMPL.
See also: USBDeviceFilters[]
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_OBJECT_STATE: USB device filter is not created within this VirtualBox
instance.
• E_INVALIDARG: USB device filter already in list.
5.63.17 removeHostOnlyNetworkInterface
IProgress IHost::removeHostOnlyNetworkInterface(
[in] uuid id)
id Adapter GUID.
Removes the given Host Only Networking interface.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: No host network interface matching id found.
5.63.18 removeUSBDeviceFilter
void IHost::removeUSBDeviceFilter(
[in] unsigned long position)
position Position to remove the filter from.
Removes a USB device filter from the specified position in the list of filters.
Positions are numbered starting from 0. Specifying a position equal to or greater than the
number of elements in the list will produce an error.
Note: If USB functionality is not available in the given edition of VirtualBox, this
method will set the result code to E_NOTIMPL.
See also: USBDeviceFilters[]
If this method fails, the following error codes may be reported:
• E_INVALIDARG: USB device filter list empty or invalid position.
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5.64 IHostNameResolutionConfigurationChangeEvent
(IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
5.65 IHostNetworkInterface
Represents one of host’s network interfaces. IP V6 address and network mask are strings
of 32 hexadecimal digits grouped by four. Groups are separated by colons. For example,
fe80:0000:0000:0000:021e:c2ff:fed2:b030.
5.65.1 Attributes
5.65.1.1 name (read-only)
wstring IHostNetworkInterface::name
Returns the host network interface name.
5.65.1.2 shortName (read-only)
wstring IHostNetworkInterface::shortName
Returns the host network interface short name.
5.65.1.3 id (read-only)
uuid IHostNetworkInterface::id
Returns the interface UUID.
5.65.1.4 networkName (read-only)
wstring IHostNetworkInterface::networkName
Returns the name of a virtual network the interface gets attached to.
5.65.1.5 DHCPEnabled (read-only)
boolean IHostNetworkInterface::DHCPEnabled
Specifies whether the DHCP is enabled for the interface.
5.65.1.6 IPAddress (read-only)
wstring IHostNetworkInterface::IPAddress
Returns the IP V4 address of the interface.
5.65.1.7 networkMask (read-only)
wstring IHostNetworkInterface::networkMask
Returns the network mask of the interface.
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5.65.1.8 IPV6Supported (read-only)
boolean IHostNetworkInterface::IPV6Supported
Specifies whether the IP V6 is supported/enabled for the interface.
5.65.1.9 IPV6Address (read-only)
wstring IHostNetworkInterface::IPV6Address
Returns the IP V6 address of the interface.
5.65.1.10 IPV6NetworkMaskPrefixLength (read-only)
unsigned long IHostNetworkInterface::IPV6NetworkMaskPrefixLength
Returns the length IP V6 network mask prefix of the interface.
5.65.1.11 hardwareAddress (read-only)
wstring IHostNetworkInterface::hardwareAddress
Returns the hardware address. For Ethernet it is MAC address.
5.65.1.12 mediumType (read-only)
HostNetworkInterfaceMediumType IHostNetworkInterface::mediumType
Type of protocol encapsulation used.
5.65.1.13 status (read-only)
HostNetworkInterfaceStatus IHostNetworkInterface::status
Status of the interface.
5.65.1.14 interfaceType (read-only)
HostNetworkInterfaceType IHostNetworkInterface::interfaceType
specifies the host interface type.
5.65.2 DHCPRediscover
void IHostNetworkInterface::DHCPRediscover()
refreshes the IP configuration for DHCP-enabled interface.
5.65.3 enableDynamicIPConfig
void IHostNetworkInterface::enableDynamicIPConfig()
enables the dynamic IP configuration.
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5.65.4 enableStaticIPConfig
void IHostNetworkInterface::enableStaticIPConfig(
[in] wstring IPAddress,
[in] wstring networkMask)
IPAddress IP address.
networkMask network mask.
sets and enables the static IP V4 configuration for the given interface.
5.65.5 enableStaticIPConfigV6
void IHostNetworkInterface::enableStaticIPConfigV6(
[in] wstring IPV6Address,
[in] unsigned long IPV6NetworkMaskPrefixLength)
IPV6Address IP address.
IPV6NetworkMaskPrefixLength network mask.
sets and enables the static IP V6 configuration for the given interface.
5.66 IHostPCIDevicePlugEvent (IMachineEvent)
Note: This interface extends IMachineEvent and therefore supports all its methods and
attributes as well.
Notification when host PCI device is plugged/unplugged. Plugging usually takes place on VM
startup, unplug - when IMachine::detachHostPCIDevice() is called.
See also: IMachine::detachHostPCIDevice()
5.66.1 Attributes
5.66.1.1 plugged (read-only)
boolean IHostPCIDevicePlugEvent::plugged
If device successfully plugged or unplugged.
5.66.1.2 success (read-only)
boolean IHostPCIDevicePlugEvent::success
If operation was successful, if false - ’message’ attribute may be of interest.
5.66.1.3 attachment (read-only)
IPCIDeviceAttachment IHostPCIDevicePlugEvent::attachment
Attachment info for this device.
5.66.1.4 message (read-only)
wstring IHostPCIDevicePlugEvent::message
Optional error message.
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5 Classes (interfaces)
5.67 IHostUSBDevice (IUSBDevice)
Note: This interface extends IUSBDevice and therefore supports all its methods and
attributes as well.
The IHostUSBDevice interface represents a physical USB device attached to the host computer.
Besides properties inherited from IUSBDevice, this interface adds the state property that holds
the current state of the USB device.
See also: IHost::USBDevices[], IHost::USBDeviceFilters[]
5.67.1 Attributes
5.67.1.1 state (read-only)
USBDeviceState IHostUSBDevice::state
Current state of the device.
5.68 IHostUSBDeviceFilter (IUSBDeviceFilter)
Note: This interface extends IUSBDeviceFilter and therefore supports all its methods
and attributes as well.
The IHostUSBDeviceFilter interface represents a global filter for a physical USB device used by
the host computer. Used indirectly in IHost::USBDeviceFilters[].
Using filters of this type, the host computer determines the initial state of the USB device after
it is physically attached to the host’s USB controller.
Note: The IUSBDeviceFilter::remote attribute is ignored by this type of filters, because
it makes sense only for machine USB filters.
See also: IHost::USBDeviceFilters[]
5.68.1 Attributes
5.68.1.1 action (read/write)
USBDeviceFilterAction IHostUSBDeviceFilter::action
Action performed by the host when an attached USB device matches this filter.
5.69 IHostVideoInputDevice
Represents one of host’s video capture devices, for example a webcam.
5.69.1 Attributes
5.69.1.1 name (read-only)
wstring IHostVideoInputDevice::name
User friendly name.
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5.69.1.2 path (read-only)
wstring IHostVideoInputDevice::path
The host path of the device.
5.69.1.3 alias (read-only)
wstring IHostVideoInputDevice::alias
An alias which can be used for IConsole::webcamAttach
5.70 IInternalMachineControl
Note: This interface is not supported in the web service.
5.70.1 adoptSavedState
void IInternalMachineControl::adoptSavedState(
[in] wstring savedStateFile)
savedStateFile Path to the saved state file to adopt.
Gets called by IConsole::adoptSavedState().
If this method fails, the following error codes may be reported:
• VBOX_E_FILE_ERROR: Invalid saved state file path.
5.70.2 autoCaptureUSBDevices
void IInternalMachineControl::autoCaptureUSBDevices()
Requests a capture all matching USB devices attached to the host. When the request is completed, the VM process will get a IInternalSessionControl::onUSBDeviceAttach() notification per
every captured device.
5.70.3 beginPowerUp
void IInternalMachineControl::beginPowerUp(
[in] IProgress progress)
progress
Tells VBoxSVC that IConsole::powerUp() is under ways and gives it the progress object that
should be part of any pending IMachine::launchVMProcess() operations. The progress object
may be called back to reflect an early cancelation, so some care have to be taken with respect to
any cancelation callbacks. The console object will call endPowerUp() to signal the completion of
the progress object.
5.70.4 beginPoweringDown
void IInternalMachineControl::beginPoweringDown(
[out] IProgress progress)
progress Progress object created by VBoxSVC to wait until the VM is powered down.
Called by the VM process to inform the server it wants to stop the VM execution and power
down.
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5 Classes (interfaces)
5.70.5 beginSavingState
void IInternalMachineControl::beginSavingState(
[out] IProgress progress,
[out] wstring stateFilePath)
progress Progress object created by VBoxSVC to wait until the state is saved.
stateFilePath File path the VM process must save the execution state to.
Called by the VM process to inform the server it wants to save the current state and stop the
VM execution.
5.70.6 beginTakingSnapshot
void IInternalMachineControl::beginTakingSnapshot(
[in] IConsole initiator,
[in] wstring name,
[in] wstring description,
[in] IProgress consoleProgress,
[in] boolean fTakingSnapshotOnline,
[out] wstring stateFilePath)
initiator The console object that initiated this call.
name Snapshot name.
description Snapshot description.
consoleProgress Progress object created by the VM process tracking the snapshot’s progress.
This has the following sub-operations:
• setting up (weight 1);
• one for each medium attachment that needs a differencing image (weight 1 each);
• another one to copy the VM state (if offline with saved state, weight is VM memory
size in MB);
• another one to save the VM state (if online, weight is VM memory size in MB);
• finishing up (weight 1)
fTakingSnapshotOnline Whether this is an online snapshot (i.e. the machine is running).
stateFilePath File path the VM process must save the execution state to.
Called from the VM process to request from the server to perform the server-side actions of
creating a snapshot (creating differencing images and the snapshot object).
If this method fails, the following error codes may be reported:
• VBOX_E_FILE_ERROR: Settings file not accessible.
• VBOX_E_XML_ERROR: Could not parse the settings file.
5.70.7 captureUSBDevice
void IInternalMachineControl::captureUSBDevice(
[in] uuid id)
id
Requests a capture of the given host USB device. When the request is completed, the VM
process will get a IInternalSessionControl::onUSBDeviceAttach() notification.
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5.70.8 deleteSnapshot
IProgress IInternalMachineControl::deleteSnapshot(
[in] IConsole initiator,
[in] uuid startId,
[in] uuid endId,
[in] boolean deleteAllChildren,
[out] MachineState machineState)
initiator The console object that initiated this call.
startId UUID of the first snapshot to delete.
endId UUID of the last snapshot to delete.
deleteAllChildren Whether all children should be deleted.
machineState New machine state after this operation is started.
Gets called by IConsole::deleteSnapshot(), IConsole::deleteSnapshotAndAllChildren() and
IConsole::deleteSnapshotRange().
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_OBJECT_STATE: Snapshot has more than one child snapshot. Only
possible if the delete operation does not delete all children or the range does not meet the
linearity condition.
5.70.9 detachAllUSBDevices
void IInternalMachineControl::detachAllUSBDevices(
[in] boolean done)
done
Notification that a VM that is being powered down. The done parameter indicates whether
which stage of the power down we’re at. When done = false the VM is announcing its intentions, while when done = true the VM is reporting what it has done.
Note: In the done = true case, the server must run its own filters and filters of all VMs
but this one on all detach devices as if they were just attached to the host computer.
5.70.10 detachUSBDevice
void IInternalMachineControl::detachUSBDevice(
[in] uuid id,
[in] boolean done)
id
done
Notification that a VM is going to detach (done = false) or has already detached (done =
true) the given USB device. When the done = true request is completed, the VM process will
get a IInternalSessionControl::onUSBDeviceDetach() notification.
Note: In the done = true case, the server must run its own filters and filters of all VMs
but this one on the detached device as if it were just attached to the host computer.
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5.70.11 ejectMedium
IMediumAttachment IInternalMachineControl::ejectMedium(
[in] IMediumAttachment attachment)
attachment The medium attachment where the eject happened.
Tells VBoxSVC that the guest has ejected the medium associated with the medium attachment.
5.70.12 endPowerUp
void IInternalMachineControl::endPowerUp(
[in] long result)
result
Tells VBoxSVC that IConsole::powerUp() has completed. This method may query status information from the progress object it received in beginPowerUp() and copy it over to any in-progress
IMachine::launchVMProcess() call in order to complete that progress object.
5.70.13 endPoweringDown
void IInternalMachineControl::endPoweringDown(
[in] long result,
[in] wstring errMsg)
result S_OK to indicate success.
errMsg human readable error message in case of failure.
Called by the VM process to inform the server that powering down previously requested by
#beginPoweringDown is either successfully finished or there was a failure.
If this method fails, the following error codes may be reported:
• VBOX_E_FILE_ERROR: Settings file not accessible.
• VBOX_E_XML_ERROR: Could not parse the settings file.
5.70.14 endSavingState
void IInternalMachineControl::endSavingState(
[in] long result,
[in] wstring errMsg)
result S_OK to indicate success.
errMsg human readable error message in case of failure.
Called by the VM process to inform the server that saving the state previously requested by
#beginSavingState is either successfully finished or there was a failure.
If this method fails, the following error codes may be reported:
• VBOX_E_FILE_ERROR: Settings file not accessible.
• VBOX_E_XML_ERROR: Could not parse the settings file.
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5.70.15 endTakingSnapshot
void IInternalMachineControl::endTakingSnapshot(
[in] boolean success)
success true to indicate success and false otherwise
Called by the VM process to inform the server that the snapshot previously requested by #beginTakingSnapshot is either successfully taken or there was a failure.
5.70.16 finishOnlineMergeMedium
void IInternalMachineControl::finishOnlineMergeMedium()
Gets called by IInternalSessionControl::onlineMergeMedium(). All necessary state information is available at the called object.
5.70.17 lockMedia
void IInternalMachineControl::lockMedia()
Locks all media attached to the machine for writing and parents of attached differencing media
(if any) for reading. This operation is atomic so that if it fails no media is actually locked.
This method is intended to be called when the machine is in Starting or Restoring state. The
locked media will be automatically unlocked when the machine is powered off or crashed.
5.70.18 onSessionEnd
IProgress IInternalMachineControl::onSessionEnd(
[in] ISession session)
session Session that is being closed
Triggered by the given session object when the session is about to close normally.
5.70.19 pullGuestProperties
void IInternalMachineControl::pullGuestProperties(
[out] wstring names[],
[out] wstring values[],
[out] long long timestamps[],
[out] wstring flags[])
names The names of the properties returned.
values The values of the properties returned. The array entries match the corresponding entries
in the name array.
timestamps The time stamps of the properties returned. The array entries match the corresponding entries in the name array.
flags The flags of the properties returned. The array entries match the corresponding entries in
the name array.
Get the list of the guest properties matching a set of patterns along with their values, time
stamps and flags and give responsibility for managing properties to the console.
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5 Classes (interfaces)
5.70.20 pushGuestProperty
void IInternalMachineControl::pushGuestProperty(
[in] wstring name,
[in] wstring value,
[in] long long timestamp,
[in] wstring flags)
name The name of the property to be updated.
value The value of the property.
timestamp The timestamp of the property.
flags The flags of the property.
Update a single guest property in IMachine.
5.70.21 reportVmStatistics
void IInternalMachineControl::reportVmStatistics(
[in] unsigned long validStats,
[in] unsigned long cpuUser,
[in] unsigned long cpuKernel,
[in] unsigned long cpuIdle,
[in] unsigned long memTotal,
[in] unsigned long memFree,
[in] unsigned long memBalloon,
[in] unsigned long memShared,
[in] unsigned long memCache,
[in] unsigned long pagedTotal,
[in] unsigned long memAllocTotal,
[in] unsigned long memFreeTotal,
[in] unsigned long memBalloonTotal,
[in] unsigned long memSharedTotal,
[in] unsigned long vmNetRx,
[in] unsigned long vmNetTx)
validStats Mask defining which parameters are valid. For example: 0x11 means that cpuIdle
and XXX are valid. Other parameters should be ignored.
cpuUser Percentage of processor time spent in user mode as seen by the guest.
cpuKernel Percentage of processor time spent in kernel mode as seen by the guest.
cpuIdle Percentage of processor time spent idling as seen by the guest.
memTotal Total amount of physical guest RAM.
memFree Free amount of physical guest RAM.
memBalloon Amount of ballooned physical guest RAM.
memShared Amount of shared physical guest RAM.
memCache Total amount of guest (disk) cache memory.
pagedTotal Total amount of space in the page file.
memAllocTotal Total amount of memory allocated by the hypervisor.
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5 Classes (interfaces)
memFreeTotal Total amount of free memory available in the hypervisor.
memBalloonTotal Total amount of memory ballooned by the hypervisor.
memSharedTotal Total amount of shared memory in the hypervisor.
vmNetRx Network receive rate for VM.
vmNetTx Network transmit rate for VM.
Passes statistics collected by VM (including guest statistics) to VBoxSVC.
5.70.22 restoreSnapshot
IProgress IInternalMachineControl::restoreSnapshot(
[in] IConsole initiator,
[in] ISnapshot snapshot,
[out] MachineState machineState)
initiator The console object that initiated this call.
snapshot The snapshot to restore the VM state from.
machineState New machine state after this operation is started.
Gets called by IConsole::restoreSnapshot().
5.70.23 runUSBDeviceFilters
void IInternalMachineControl::runUSBDeviceFilters(
[in] IUSBDevice device,
[out] boolean matched,
[out] unsigned long maskedInterfaces)
device
matched
maskedInterfaces
Asks the server to run USB devices filters of the associated machine against the given USB
device and tell if there is a match.
Note: Intended to be used only for remote USB devices. Local ones don’t require to
call this method (this is done implicitly by the Host and USBProxyService).
5.70.24 setRemoveSavedStateFile
void IInternalMachineControl::setRemoveSavedStateFile(
[in] boolean remove)
remove
Updates the flag whether the saved state file is removed on a machine state change from Saved
to PoweredOff.
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5 Classes (interfaces)
5.70.25 unlockMedia
void IInternalMachineControl::unlockMedia()
Unlocks all media previously locked using lockMedia().
This method is intended to be used with teleportation so that it is possible to teleport between
processes on the same machine.
5.70.26 updateState
void IInternalMachineControl::updateState(
[in] MachineState state)
state
Updates the VM state.
Note: This operation will also update the settings file with the correct information
about the saved state file and delete this file from disk when appropriate.
5.71 IInternalSessionControl
Note: This interface is not supported in the web service.
5.71.1 accessGuestProperty
void IInternalSessionControl::accessGuestProperty(
[in] wstring name,
[in] wstring value,
[in] wstring flags,
[in] boolean isSetter,
[out] wstring retValue,
[out] long long retTimestamp,
[out] wstring retFlags)
name
value
flags
isSetter
retValue
retTimestamp
retFlags
Called by IMachine::getGuestProperty() and by IMachine::setGuestProperty() in order to read
and modify guest properties.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Machine session is not open.
• VBOX_E_INVALID_OBJECT_STATE: Session type is not direct.
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5 Classes (interfaces)
5.71.2 assignRemoteMachine
void IInternalSessionControl::assignRemoteMachine(
[in] IMachine machine,
[in] IConsole console)
machine
console
Assigns the machine and the (remote) console object associated with this remote-type session.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
5.71.3 enableVMMStatistics
void IInternalSessionControl::enableVMMStatistics(
[in] boolean enable)
enable True enables statistics collection.
Enables or disables collection of VMM RAM statistics.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Machine session is not open.
• VBOX_E_INVALID_OBJECT_STATE: Session type is not direct.
5.71.4 enumerateGuestProperties
void IInternalSessionControl::enumerateGuestProperties(
[in] wstring patterns,
[out] wstring keys[],
[out] wstring values[],
[out] long long timestamps[],
[out] wstring flags[])
patterns The patterns to match the properties against as a comma-separated string. If this is
empty, all properties currently set will be returned.
keys The key names of the properties returned.
values The values of the properties returned. The array entries match the corresponding entries
in the key array.
timestamps The time stamps of the properties returned. The array entries match the corresponding entries in the key array.
flags The flags of the properties returned. The array entries match the corresponding entries in
the key array.
Return a list of the guest properties matching a set of patterns along with their values, time
stamps and flags.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Machine session is not open.
• VBOX_E_INVALID_OBJECT_STATE: Session type is not direct.
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5 Classes (interfaces)
5.71.5 getPID
unsigned long IInternalSessionControl::getPID()
PID of the process that has created this Session object.
5.71.6 getRemoteConsole
IConsole IInternalSessionControl::getRemoteConsole()
Returns the console object suitable for remote control.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
• VBOX_E_INVALID_OBJECT_STATE: Session type prevents operation.
5.71.7 onBandwidthGroupChange
void IInternalSessionControl::onBandwidthGroupChange(
[in] IBandwidthGroup bandwidthGroup)
bandwidthGroup The bandwidth group which changed.
Notification when one of the bandwidth groups change.
5.71.8 onCPUChange
void IInternalSessionControl::onCPUChange(
[in] unsigned long cpu,
[in] boolean add)
cpu The CPU which changed
add Flag whether the CPU was added or removed
Notification when a CPU changes.
5.71.9 onCPUExecutionCapChange
void IInternalSessionControl::onCPUExecutionCapChange(
[in] unsigned long executionCap)
executionCap The new CPU execution cap value. (1-100)
Notification when the CPU execution cap changes.
5.71.10 onClipboardModeChange
void IInternalSessionControl::onClipboardModeChange(
[in] ClipboardMode clipboardMode)
clipboardMode The new shared clipboard mode.
Notification when the shared clipboard mode changes.
154
5 Classes (interfaces)
5.71.11 onDragAndDropModeChange
void IInternalSessionControl::onDragAndDropModeChange(
[in] DragAndDropMode dragAndDropMode)
dragAndDropMode The new mode for drag’n’drop.
Notification when the drag’n’drop mode changes.
5.71.12 onMediumChange
void IInternalSessionControl::onMediumChange(
[in] IMediumAttachment mediumAttachment,
[in] boolean force)
mediumAttachment The medium attachment which changed.
force If the medium change was forced.
Triggered when attached media of the associated virtual machine have changed.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
• VBOX_E_INVALID_OBJECT_STATE: Session type prevents operation.
5.71.13 onNetworkAdapterChange
void IInternalSessionControl::onNetworkAdapterChange(
[in] INetworkAdapter networkAdapter,
[in] boolean changeAdapter)
networkAdapter
changeAdapter
Triggered when settings of a network adapter of the associated virtual machine have changed.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
• VBOX_E_INVALID_OBJECT_STATE: Session type prevents operation.
5.71.14 onParallelPortChange
void IInternalSessionControl::onParallelPortChange(
[in] IParallelPort parallelPort)
parallelPort
Triggered when settings of a parallel port of the associated virtual machine have changed.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
• VBOX_E_INVALID_OBJECT_STATE: Session type prevents operation.
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5 Classes (interfaces)
5.71.15 onSerialPortChange
void IInternalSessionControl::onSerialPortChange(
[in] ISerialPort serialPort)
serialPort
Triggered when settings of a serial port of the associated virtual machine have changed.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
• VBOX_E_INVALID_OBJECT_STATE: Session type prevents operation.
5.71.16 onSharedFolderChange
void IInternalSessionControl::onSharedFolderChange(
[in] boolean global)
global
Triggered when a permanent (global or machine) shared folder has been created or removed.
Note: We don’t pass shared folder parameters in this notification because the order in
which parallel notifications are delivered is not defined, therefore it could happen that
these parameters were outdated by the time of processing this notification.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
• VBOX_E_INVALID_OBJECT_STATE: Session type prevents operation.
5.71.17 onShowWindow
void IInternalSessionControl::onShowWindow(
[in] boolean check,
[out] boolean canShow,
[out] long long winId)
check
canShow
winId
Called by IMachine::canShowConsoleWindow() and by IMachine::showConsoleWindow() in
order to notify console listeners ICanShowWindowEvent and IShowWindowEvent.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_OBJECT_STATE: Session type prevents operation.
5.71.18 onStorageControllerChange
void IInternalSessionControl::onStorageControllerChange()
Triggered when settings of a storage controller of the associated virtual machine have changed.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
• VBOX_E_INVALID_OBJECT_STATE: Session type prevents operation.
156
5 Classes (interfaces)
5.71.19 onStorageDeviceChange
void IInternalSessionControl::onStorageDeviceChange(
[in] IMediumAttachment mediumAttachment,
[in] boolean remove,
[in] boolean silent)
mediumAttachment The medium attachment which changed.
remove TRUE if the device is removed, FALSE if it was added.
silent TRUE if the device is is silently reconfigured without notifying the guest about it.
Triggered when attached storage devices of the associated virtual machine have changed.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
• VBOX_E_INVALID_OBJECT_STATE: Session type prevents operation.
5.71.20 onUSBControllerChange
void IInternalSessionControl::onUSBControllerChange()
Triggered when settings of the USB controller object of the associated virtual machine have
changed.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
• VBOX_E_INVALID_OBJECT_STATE: Session type prevents operation.
5.71.21 onUSBDeviceAttach
void IInternalSessionControl::onUSBDeviceAttach(
[in] IUSBDevice device,
[in] IVirtualBoxErrorInfo error,
[in] unsigned long maskedInterfaces)
device
error
maskedInterfaces
Triggered when a request to capture a USB device (as a result of matched USB filters or direct call to IConsole::attachUSBDevice()) has completed. A nullerror object means success,
otherwise it describes a failure.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
• VBOX_E_INVALID_OBJECT_STATE: Session type prevents operation.
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5 Classes (interfaces)
5.71.22 onUSBDeviceDetach
void IInternalSessionControl::onUSBDeviceDetach(
[in] uuid id,
[in] IVirtualBoxErrorInfo error)
id
error
Triggered when a request to release the USB device (as a result of machine termination or
direct call to IConsole::detachUSBDevice()) has completed. A nullerror object means success,
otherwise it describes a failure.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
• VBOX_E_INVALID_OBJECT_STATE: Session type prevents operation.
5.71.23 onVRDEServerChange
void IInternalSessionControl::onVRDEServerChange(
[in] boolean restart)
restart Flag whether the server must be restarted
Triggered when settings of the VRDE server object of the associated virtual machine have
changed.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
• VBOX_E_INVALID_OBJECT_STATE: Session type prevents operation.
5.71.24 onVideoCaptureChange
void IInternalSessionControl::onVideoCaptureChange()
Triggered when video capture settings have changed.
5.71.25 onlineMergeMedium
void IInternalSessionControl::onlineMergeMedium(
[in] IMediumAttachment mediumAttachment,
[in] unsigned long sourceIdx,
[in] unsigned long targetIdx,
[in] IProgress progress)
mediumAttachment The medium attachment to identify the medium chain.
sourceIdx The index of the source image in the chain. Redundant, but drastically reduces IPC.
targetIdx The index of the target image in the chain. Redundant, but drastically reduces IPC.
progress Progress object for this operation.
Triggers online merging of a hard disk. Used internally when deleting a snapshot while a VM
referring to the same hard disk chain is running.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Machine session is not open.
• VBOX_E_INVALID_OBJECT_STATE: Session type is not direct.
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5 Classes (interfaces)
5.71.26 pauseWithReason
void IInternalSessionControl::pauseWithReason(
[in] Reason reason)
reason Specify the best matching reason code please.
Internal method for triggering a VM pause with a specified reason code. The reason code can
be interpreted by device/drivers and thus it might behave slightly differently than a normal VM
pause.
See also: IConsole::pause()
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine not in Running state.
• VBOX_E_VM_ERROR: Virtual machine error in suspend operation.
5.71.27 resumeWithReason
void IInternalSessionControl::resumeWithReason(
[in] Reason reason)
reason Specify the best matching reason code please.
Internal method for triggering a VM resume with a specified reason code. The reason code can
be interpreted by device/drivers and thus it might behave slightly differently than a normal VM
resume.
See also: IConsole::resume()
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine not in Paused state.
• VBOX_E_VM_ERROR: Virtual machine error in resume operation.
5.71.28 saveStateWithReason
IProgress IInternalSessionControl::saveStateWithReason(
[in] Reason reason)
reason Specify the best matching reason code please.
Internal method for triggering a VM save state with a specified reason code. The reason code
can be interpreted by device/drivers and thus it might behave slightly differently than a normal
VM save state.
See also: IConsole::saveState()
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine state neither Running nor Paused.
• VBOX_E_FILE_ERROR: Failed to create directory for saved state file.
5.71.29 uninitialize
void IInternalSessionControl::uninitialize()
Uninitializes (closes) this session. Used by VirtualBox to close the corresponding remote session when the direct session dies or gets closed.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
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5 Classes (interfaces)
5.71.30 updateMachineState
void IInternalSessionControl::updateMachineState(
[in] MachineState machineState)
machineState
Updates the machine state in the VM process. Must be called only in certain cases (see the
method implementation).
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Session state prevents operation.
• VBOX_E_INVALID_OBJECT_STATE: Session type prevents operation.
5.72 IKeyboard
The IKeyboard interface represents the virtual machine’s keyboard. Used in IConsole::keyboard.
Use this interface to send keystrokes or the Ctrl-Alt-Del sequence to the virtual machine.
5.72.1 Attributes
5.72.1.1 eventSource (read-only)
IEventSource IKeyboard::eventSource
Event source for keyboard events.
5.72.2 putCAD
void IKeyboard::putCAD()
Sends the Ctrl-Alt-Del sequence to the keyboard. This function is nothing special, it is just a
convenience function calling putScancodes() with the proper scancodes.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Could not send all scan codes to virtual keyboard.
5.72.3 putScancode
void IKeyboard::putScancode(
[in] long scancode)
scancode
Sends a scancode to the keyboard.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Could not send scan code to virtual keyboard.
5.72.4 putScancodes
unsigned long IKeyboard::putScancodes(
[in] long scancodes[])
scancodes
Sends an array of scancodes to the keyboard.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Could not send all scan codes to virtual keyboard.
160
5 Classes (interfaces)
5.73 IKeyboardLedsChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when the guest OS executes the KBD_CMD_SET_LEDS command to alter the state
of the keyboard LEDs.
5.73.1 Attributes
5.73.1.1 numLock (read-only)
boolean IKeyboardLedsChangedEvent::numLock
NumLock status.
5.73.1.2 capsLock (read-only)
boolean IKeyboardLedsChangedEvent::capsLock
CapsLock status.
5.73.1.3 scrollLock (read-only)
boolean IKeyboardLedsChangedEvent::scrollLock
ScrollLock status.
5.74 IMachine
The IMachine interface represents a virtual machine, or guest, created in VirtualBox.
This interface is used in two contexts. First of all, a collection of objects implementing this
interface is stored in the IVirtualBox::machines[] attribute which lists all the virtual machines
that are currently registered with this VirtualBox installation. Also, once a session has been
opened for the given virtual machine (e.g. the virtual machine is running), the machine object
associated with the open session can be queried from the session object; see ISession for details.
The main role of this interface is to expose the settings of the virtual machine and provide
methods to change various aspects of the virtual machine’s configuration. For machine objects
stored in the IVirtualBox::machines[] collection, all attributes are read-only unless explicitly
stated otherwise in individual attribute and method descriptions.
In order to change a machine setting, a session for this machine must be opened using one
of the lockMachine() or launchVMProcess() methods. After the machine has been successfully
locked for a session, a mutable machine object needs to be queried from the session object and
then the desired settings changes can be applied to the returned object using IMachine attributes
and methods. See the ISession interface description for more information about sessions.
Note that IMachine does not provide methods to control virtual machine execution (such as
start the machine, or power it down) – these methods are grouped in a separate interface called
IConsole.
See also: ISession, IConsole
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5 Classes (interfaces)
5.74.1 Attributes
5.74.1.1 parent (read-only)
IVirtualBox IMachine::parent
Associated parent object.
5.74.1.2 icon (read/write)
octet IMachine::icon[]
Overridden VM Icon details.
5.74.1.3 accessible (read-only)
boolean IMachine::accessible
Whether this virtual machine is currently accessible or not.
A machine is always deemed accessible unless it is registered and its settings file cannot be
read or parsed (either because the file itself is unavailable or has invalid XML contents).
Every time this property is read, the accessibility state of this machine is re-evaluated. If
the returned value is false, the accessError property may be used to get the detailed error
information describing the reason of inaccessibility, including XML error messages.
When the machine is inaccessible, only the following properties can be used on it:
• parent
• id
• settingsFilePath
• accessible
• accessError
An attempt to access any other property or method will return an error.
The only possible action you can perform on an inaccessible machine is to unregister it using
the unregister() call (or, to check for the accessibility state once more by querying this property).
Note: In the current implementation, once this property returns true, the machine
will never become inaccessible later, even if its settings file cannot be successfully
read/written any more (at least, until the VirtualBox server is restarted). This limitation may be removed in future releases.
5.74.1.4 accessError (read-only)
IVirtualBoxErrorInfo IMachine::accessError
Error information describing the reason of machine inaccessibility.
Reading this property is only valid after the last call to accessible returned false (i.e. the machine is currently inaccessible). Otherwise, a null IVirtualBoxErrorInfo object will be returned.
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5 Classes (interfaces)
5.74.1.5 name (read/write)
wstring IMachine::name
Name of the virtual machine.
Besides being used for human-readable identification purposes everywhere in VirtualBox, the
virtual machine name is also used as a name of the machine’s settings file and as a name of
the subdirectory this settings file resides in. Thus, every time you change the value of this
property, the settings file will be renamed once you call saveSettings() to confirm the change.
The containing subdirectory will be also renamed, but only if it has exactly the same name as the
settings file itself prior to changing this property (for backward compatibility with previous API
releases). The above implies the following limitations:
• The machine name cannot be empty.
• The machine name can contain only characters that are valid file name characters according to the rules of the file system used to store VirtualBox configuration.
• You cannot have two or more machines with the same name if they use the same subdirectory for storing the machine settings files.
• You cannot change the name of the machine if it is running, or if any file in the directory
containing the settings file is being used by another running machine or by any other
process in the host operating system at a time when saveSettings() is called.
If any of the above limitations are hit, saveSettings() will return an appropriate error message
explaining the exact reason and the changes you made to this machine will not be saved.
Starting with VirtualBox 4.0, a “.vbox” extension of the settings file is recommended, but not
enforced. (Previous versions always used a generic “.xml” extension.)
5.74.1.6 description (read/write)
wstring IMachine::description
Description of the virtual machine.
The description attribute can contain any text and is typically used to describe the hardware
and software configuration of the virtual machine in detail (i.e. network settings, versions of the
installed software and so on).
5.74.1.7 id (read-only)
uuid IMachine::id
UUID of the virtual machine.
5.74.1.8 groups (read/write)
wstring IMachine::groups[]
Array of machine group names of which this machine is a member. "" and "/" are synonyms
for the toplevel group. Each group is only listed once, however they are listed in no particular
order and there is no guarantee that there are no gaps in the group hierarchy (i.e. "/group",
"/group/subgroup/subsubgroup" is a valid result).
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5 Classes (interfaces)
5.74.1.9 OSTypeId (read/write)
wstring IMachine::OSTypeId
User-defined identifier of the Guest OS type. You may use IVirtualBox::getGuestOSType() to
obtain an IGuestOSType object representing details about the given Guest OS type.
Note: This value may differ from the value returned by IGuest::OSTypeId if Guest
Additions are installed to the guest OS.
5.74.1.10 hardwareVersion (read/write)
wstring IMachine::hardwareVersion
Hardware version identifier. Internal use only for now.
5.74.1.11 hardwareUUID (read/write)
uuid IMachine::hardwareUUID
The UUID presented to the guest via memory tables, hardware and guest properties. For most
VMs this is the same as the id, but for VMs which have been cloned or teleported it may be the
same as the source VM. The latter is because the guest shouldn’t notice that it was cloned or
teleported.
5.74.1.12 CPUCount (read/write)
unsigned long IMachine::CPUCount
Number of virtual CPUs in the VM.
5.74.1.13 CPUHotPlugEnabled (read/write)
boolean IMachine::CPUHotPlugEnabled
This setting determines whether VirtualBox allows CPU hotplugging for this machine.
5.74.1.14 CPUExecutionCap (read/write)
unsigned long IMachine::CPUExecutionCap
Means to limit the number of CPU cycles a guest can use. The unit is percentage of host CPU
cycles per second. The valid range is 1 - 100. 100 (the default) implies no limit.
5.74.1.15 memorySize (read/write)
unsigned long IMachine::memorySize
System memory size in megabytes.
5.74.1.16 memoryBalloonSize (read/write)
unsigned long IMachine::memoryBalloonSize
Memory balloon size in megabytes.
164
5 Classes (interfaces)
5.74.1.17 pageFusionEnabled (read/write)
boolean IMachine::pageFusionEnabled
This setting determines whether VirtualBox allows page fusion for this machine (64-bit hosts
only).
5.74.1.18 graphicsControllerType (read/write)
GraphicsControllerType IMachine::graphicsControllerType
Graphics controller type.
5.74.1.19 VRAMSize (read/write)
unsigned long IMachine::VRAMSize
Video memory size in megabytes.
5.74.1.20 accelerate3DEnabled (read/write)
boolean IMachine::accelerate3DEnabled
This setting determines whether VirtualBox allows this machine to make use of the 3D graphics
support available on the host.
5.74.1.21 accelerate2DVideoEnabled (read/write)
boolean IMachine::accelerate2DVideoEnabled
This setting determines whether VirtualBox allows this machine to make use of the 2D video
acceleration support available on the host.
5.74.1.22 monitorCount (read/write)
unsigned long IMachine::monitorCount
Number of virtual monitors.
Note: Only effective on Windows XP and later guests with Guest Additions installed.
5.74.1.23 videoCaptureEnabled (read/write)
boolean IMachine::videoCaptureEnabled
This setting determines whether VirtualBox uses video recording to record VM session.
5.74.1.24 videoCaptureScreens (read/write)
boolean IMachine::videoCaptureScreens[]
This setting determines for which screens video recording is enabled.
165
5 Classes (interfaces)
5.74.1.25 videoCaptureFile (read/write)
wstring IMachine::videoCaptureFile
This setting determines the filename VirtualBox uses to save the recorded content. This setting
cannot be changed while video capturing is enabled.
Note: When setting this attribute, the specified path has to be absolute (full path).
When reading this attribute, a full path is always returned.
5.74.1.26 videoCaptureWidth (read/write)
unsigned long IMachine::videoCaptureWidth
This setting determines the horizontal resolution of the recorded video. This setting cannot be
changed while video capturing is enabled.
5.74.1.27 videoCaptureHeight (read/write)
unsigned long IMachine::videoCaptureHeight
This setting determines the vertical resolution of the recorded video. This setting cannot be
changed while video capturing is enabled.
5.74.1.28 videoCaptureRate (read/write)
unsigned long IMachine::videoCaptureRate
This setting determines the bitrate in kilobits per second. Increasing this value makes the
video look better for the cost of an increased file size. This setting cannot be changed while
video capturing is enabled.
5.74.1.29 videoCaptureFPS (read/write)
unsigned long IMachine::videoCaptureFPS
This setting determines the maximum number of frames per second. Frames with a higher
frequency will be skipped. Reducing this value increases the number of skipped frames and
reduces the file size. This setting cannot be changed while video capturing is enabled.
5.74.1.30 BIOSSettings (read-only)
IBIOSSettings IMachine::BIOSSettings
Object containing all BIOS settings.
5.74.1.31 firmwareType (read/write)
FirmwareType IMachine::firmwareType
Type of firmware (such as legacy BIOS or EFI), used for initial bootstrap in this VM.
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5.74.1.32 pointingHIDType (read/write)
PointingHIDType IMachine::pointingHIDType
Type of pointing HID (such as mouse or tablet) used in this VM. The default is typically
“PS2Mouse” but can vary depending on the requirements of the guest operating system.
5.74.1.33 keyboardHIDType (read/write)
KeyboardHIDType IMachine::keyboardHIDType
Type of keyboard HID used in this VM. The default is typically “PS2Keyboard” but can vary
depending on the requirements of the guest operating system.
5.74.1.34 HPETEnabled (read/write)
boolean IMachine::HPETEnabled
This attribute controls if High Precision Event Timer (HPET) is enabled in this VM. Use this
property if you want to provide guests with additional time source, or if guest requires HPET to
function correctly. Default is false.
5.74.1.35 chipsetType (read/write)
ChipsetType IMachine::chipsetType
Chipset type used in this VM.
5.74.1.36 snapshotFolder (read/write)
wstring IMachine::snapshotFolder
Full path to the directory used to store snapshot data (differencing media and saved state files)
of this machine.
The initial value of this property is < path_to_settings_file>/<machine_uuid>.
Currently, it is an error to try to change this property on a machine that has snapshots (because
this would require to move possibly large files to a different location). A separate method will
be available for this purpose later.
Note: Setting this property to null or to an empty string will restore the initial value.
Note: When setting this property, the specified path can be absolute (full path) or
relative to the directory where the machine settings file is located. When reading this
property, a full path is always returned.
Note: The specified path may not exist, it will be created when necessary.
5.74.1.37 VRDEServer (read-only)
IVRDEServer IMachine::VRDEServer
VirtualBox Remote Desktop Extension (VRDE) server object.
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5.74.1.38 emulatedUSBCardReaderEnabled (read/write)
boolean IMachine::emulatedUSBCardReaderEnabled
5.74.1.39 mediumAttachments (read-only)
IMediumAttachment IMachine::mediumAttachments[]
Array of media attached to this machine.
5.74.1.40 USBControllers (read-only)
IUSBController IMachine::USBControllers[]
Array of USB controllers attached to this machine.
Note: If USB functionality is not available in the given edition of VirtualBox, this
method will set the result code to E_NOTIMPL.
5.74.1.41 USBDeviceFilters (read-only)
IUSBDeviceFilters IMachine::USBDeviceFilters
Associated USB device filters object.
Note: If USB functionality is not available in the given edition of VirtualBox, this
method will set the result code to E_NOTIMPL.
5.74.1.42 audioAdapter (read-only)
IAudioAdapter IMachine::audioAdapter
Associated audio adapter, always present.
5.74.1.43 storageControllers (read-only)
IStorageController IMachine::storageControllers[]
Array of storage controllers attached to this machine.
5.74.1.44 settingsFilePath (read-only)
wstring IMachine::settingsFilePath
Full name of the file containing machine settings data.
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5.74.1.45 settingsModified (read-only)
boolean IMachine::settingsModified
Whether the settings of this machine have been modified (but neither yet saved nor discarded).
Note: Reading this property is only valid on instances returned by ISession::machine
and on new machines created by IVirtualBox::createMachine() or opened by
IVirtualBox::openMachine() but not yet registered, or on unregistered machines after
calling unregister(). For all other cases, the settings can never be modified.
Note: For newly created unregistered machines, the value of this property is always true until saveSettings() is called (no matter if any machine settings have been
changed after the creation or not). For opened machines the value is set to false (and
then follows to normal rules).
5.74.1.46 sessionState (read-only)
SessionState IMachine::sessionState
Current session state for this machine.
5.74.1.47 sessionType (read-only)
wstring IMachine::sessionType
Type of the session. If sessionState is Spawning or Locked, this attribute contains the same
value as passed to the launchVMProcess() method in the type parameter. If the session was
used with lockMachine(), or if sessionState is SessionClosed, the value of this attribute is an
empty string.
5.74.1.48 sessionPID (read-only)
unsigned long IMachine::sessionPID
Identifier of the session process. This attribute contains the platform-dependent identifier of
the process whose session was used with lockMachine() call. The returned value is only valid if
sessionState is Locked or Unlocking by the time this property is read.
5.74.1.49 state (read-only)
MachineState IMachine::state
Current execution state of this machine.
5.74.1.50 lastStateChange (read-only)
long long IMachine::lastStateChange
Time stamp of the last execution state change, in milliseconds since 1970-01-01 UTC.
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5.74.1.51 stateFilePath (read-only)
wstring IMachine::stateFilePath
Full path to the file that stores the execution state of the machine when it is in the Saved state.
Note: When the machine is not in the Saved state, this attribute is an empty string.
5.74.1.52 logFolder (read-only)
wstring IMachine::logFolder
Full path to the folder that stores a set of rotated log files recorded during machine execution.
The most recent log file is named VBox.log, the previous log file is named VBox.log.1 and so
on (up to VBox.log.3 in the current version).
5.74.1.53 currentSnapshot (read-only)
ISnapshot IMachine::currentSnapshot
Current snapshot of this machine. This is null if the machine currently has no snapshots. If
it is not null, then it was set by one of IConsole::takeSnapshot(), IConsole::deleteSnapshot() or
IConsole::restoreSnapshot(), depending on which was called last. See ISnapshot for details.
5.74.1.54 snapshotCount (read-only)
unsigned long IMachine::snapshotCount
Number of snapshots taken on this machine. Zero means the machine doesn’t have any snapshots.
5.74.1.55 currentStateModified (read-only)
boolean IMachine::currentStateModified
Returns true if the current state of the machine is not identical to the state stored in the
current snapshot.
The current state is identical to the current snapshot only directly after one of the following
calls are made:
• IConsole::restoreSnapshot()
• IConsole::takeSnapshot() (issued on a “powered off” or “saved” machine, for which
settingsModified returns false)
The current state remains identical until one of the following happens:
• settings of the machine are changed
• the saved state is deleted
• the current snapshot is deleted
• an attempt to execute the machine is made
Note: For machines that don’t have snapshots, this property is always false.
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5.74.1.56 sharedFolders (read-only)
ISharedFolder IMachine::sharedFolders[]
Collection of shared folders for this machine (permanent shared folders). These folders are
shared automatically at machine startup and available only to the guest OS installed within this
machine.
New shared folders are added to the collection using createSharedFolder(). Existing shared
folders can be removed using removeSharedFolder().
5.74.1.57 clipboardMode (read/write)
ClipboardMode IMachine::clipboardMode
Synchronization mode between the host OS clipboard and the guest OS clipboard.
5.74.1.58 dragAndDropMode (read/write)
DragAndDropMode IMachine::dragAndDropMode
Which mode is allowed for drag’n’drop.
5.74.1.59 guestPropertyNotificationPatterns (read/write)
wstring IMachine::guestPropertyNotificationPatterns
A comma-separated list of simple glob patterns. Changes to guest properties whose name
matches one of the patterns will generate an IGuestPropertyChangedEvent signal.
5.74.1.60 teleporterEnabled (read/write)
boolean IMachine::teleporterEnabled
When set to true, the virtual machine becomes a target teleporter the next time it is powered
on. This can only set to true when the VM is in the PoweredOff or Aborted state.
5.74.1.61 teleporterPort (read/write)
unsigned long IMachine::teleporterPort
The TCP port the target teleporter will listen for incoming teleportations on.
0 means the port is automatically selected upon power on. The actual value can be read from
this property while the machine is waiting for incoming teleportations.
5.74.1.62 teleporterAddress (read/write)
wstring IMachine::teleporterAddress
The address the target teleporter will listen on. If set to an empty string, it will listen on all
addresses.
5.74.1.63 teleporterPassword (read/write)
wstring IMachine::teleporterPassword
The password to check for on the target teleporter. This is just a very basic measure to prevent
simple hacks and operators accidentally beaming a virtual machine to the wrong place.
Note that you SET a plain text password while reading back a HASHED password. Setting a
hashed password is currently not supported.
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5.74.1.64 faultToleranceState (read/write)
FaultToleranceState IMachine::faultToleranceState
Fault tolerance state; disabled, source or target. This property can be changed at any time. If
you change it for a running VM, then the fault tolerance address and port must be set beforehand.
5.74.1.65 faultTolerancePort (read/write)
unsigned long IMachine::faultTolerancePort
The TCP port the fault tolerance source or target will use for communication.
5.74.1.66 faultToleranceAddress (read/write)
wstring IMachine::faultToleranceAddress
The address the fault tolerance source or target.
5.74.1.67 faultTolerancePassword (read/write)
wstring IMachine::faultTolerancePassword
The password to check for on the standby VM. This is just a very basic measure to prevent
simple hacks and operators accidentally choosing the wrong standby VM.
5.74.1.68 faultToleranceSyncInterval (read/write)
unsigned long IMachine::faultToleranceSyncInterval
The interval in ms used for syncing the state between source and target.
5.74.1.69 RTCUseUTC (read/write)
boolean IMachine::RTCUseUTC
When set to true, the RTC device of the virtual machine will run in UTC time, otherwise in
local time. Especially Unix guests prefer the time in UTC.
5.74.1.70 IOCacheEnabled (read/write)
boolean IMachine::IOCacheEnabled
When set to true, the builtin I/O cache of the virtual machine will be enabled.
5.74.1.71 IOCacheSize (read/write)
unsigned long IMachine::IOCacheSize
Maximum size of the I/O cache in MB.
5.74.1.72 PCIDeviceAssignments (read-only)
IPCIDeviceAttachment IMachine::PCIDeviceAssignments[]
Array of PCI devices assigned to this machine, to get list of all PCI devices attached to the
machine use IConsole::attachedPCIDevices[] attribute, as this attribute is intended to list only
devices additional to what described in virtual hardware config. Usually, this list keeps host’s
physical devices assigned to the particular machine.
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5.74.1.73 bandwidthControl (read-only)
IBandwidthControl IMachine::bandwidthControl
Bandwidth control manager.
5.74.1.74 tracingEnabled (read/write)
boolean IMachine::tracingEnabled
Enables the tracing facility in the VMM (including PDM devices + drivers). The VMM will
consume about 0.5MB of more memory when enabled and there may be some extra overhead
from tracepoints that are always enabled.
5.74.1.75 tracingConfig (read/write)
wstring IMachine::tracingConfig
Tracepoint configuration to apply at startup when tracingEnabled is true. The string specifies a space separated of tracepoint group names to enable. The special group ’all’ enables all
tracepoints. Check DBGFR3TracingConfig for more details on available tracepoint groups and
such.
Note that on hosts supporting DTrace (or similar), a lot of the tracepoints may be implemented
exclusively as DTrace probes. So, the effect of the same config may differ between Solaris and
Windows for example.
5.74.1.76 allowTracingToAccessVM (read/write)
boolean IMachine::allowTracingToAccessVM
Enables tracepoints in PDM devices and drivers to use the VMCPU or VM structures when
firing off trace points. This is especially useful with DTrace tracepoints, as it allows you to use
the VMCPU or VM pointer to obtain useful information such as guest register state.
This is disabled by default because devices and drivers normally has no business accessing the
VMCPU or VM structures, and are therefore unable to get any pointers to these.
5.74.1.77 autostartEnabled (read/write)
boolean IMachine::autostartEnabled
Enables autostart of the VM during system boot.
5.74.1.78 autostartDelay (read/write)
unsigned long IMachine::autostartDelay
Number of seconds to wait until the VM should be started during system boot.
5.74.1.79 autostopType (read/write)
AutostopType IMachine::autostopType
Action type to do when the system is shutting down.
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5.74.1.80 defaultFrontend (read/write)
wstring IMachine::defaultFrontend
Selects which VM frontend should be used by default when launching this VM through the
launchVMProcess() method. Empty or null strings do not define a particular default, it is up
to launchVMProcess() to select one. See the description of launchVMProcess() for the valid
frontend types.
This per-VM setting overrides the default defined by ISystemProperties::defaultFrontend attribute, and is overridden by a frontend type passed to launchVMProcess().
5.74.1.81 USBProxyAvailable (read-only)
boolean IMachine::USBProxyAvailable
Returns whether there is an USB proxy available.
5.74.2 addStorageController
IStorageController IMachine::addStorageController(
[in] wstring name,
[in] StorageBus connectionType)
name
connectionType
Adds a new storage controller (SCSI, SAS or SATA controller) to the machine and returns it as
an instance of IStorageController.
name identifies the controller for subsequent calls such as getStorageControllerByName(),
getStorageControllerByInstance(), removeStorageController(), attachDevice() or mountMedium().
After the controller has been added, you can set its exact type by setting the IStorageController::controllerType.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_IN_USE: A storage controller with given name exists already.
• E_INVALIDARG: Invalid controllerType.
5.74.3 addUSBController
IUSBController IMachine::addUSBController(
[in] wstring name,
[in] USBControllerType type)
name
type
Adds a new USB controller to the machine and returns it as an instance of IUSBController.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_IN_USE: A USB controller with given type exists already.
• E_INVALIDARG: Invalid controllerType.
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5.74.4 attachDevice
void IMachine::attachDevice(
[in] wstring name,
[in] long controllerPort,
[in] long device,
[in] DeviceType type,
[in] IMedium medium)
name Name of the storage controller to attach the device to.
controllerPort Port to attach the device to. For an IDE controller, 0 specifies the primary controller and 1 specifies the secondary controller. For a SCSI controller, this must range from
0 to 15; for a SATA controller, from 0 to 29; for an SAS controller, from 0 to 7.
device Device slot in the given port to attach the device to. This is only relevant for IDE controllers, for which 0 specifies the master device and 1 specifies the slave device. For all
other controller types, this must be 0.
type Device type of the attached device. For media opened by IVirtualBox::openMedium(), this
must match the device type specified there.
medium Medium to mount or null for an empty drive.
Attaches a device and optionally mounts a medium to the given storage controller
(IStorageController, identified by name), at the indicated port and device.
This method is intended for managing storage devices in general while a machine is powered
off. It can be used to attach and detach fixed and removable media. The following kind of media
can be attached to a machine:
• For fixed and removable media, you can pass in a medium that was previously opened
using IVirtualBox::openMedium().
• Only for storage devices supporting removable media (such as DVDs and floppies), you
can also specify a null pointer to indicate an empty drive or one of the medium objects
listed in the IHost::DVDDrives[] and IHost::floppyDrives[] arrays to indicate a host drive.
For removable devices, you can also use mountMedium() to change the media while the
machine is running.
In a VM’s default configuration of virtual machines, the secondary master of the IDE controller
is used for a CD/DVD drive.
After calling this returns successfully, a new instance of IMediumAttachment will appear in the
machine’s list of medium attachments (see mediumAttachments[]).
See IMedium and IMediumAttachment for more information about attaching media.
The specified device slot must not have a device attached to it, or this method will fail.
Note: You cannot attach a device to a newly created machine until this machine’s
settings are saved to disk using saveSettings().
Note: If the medium is being attached indirectly, a new differencing medium will
implicitly be created for it and attached instead. If the changes made to the machine
settings (including this indirect attachment) are later cancelled using discardSettings(),
this implicitly created differencing medium will implicitly be deleted.
If this method fails, the following error codes may be reported:
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• E_INVALIDARG: SATA device, SATA port, IDE port or IDE slot out of range, or file or UUID
not found.
• VBOX_E_INVALID_OBJECT_STATE: Machine must be registered before media can be attached.
• VBOX_E_INVALID_VM_STATE: Invalid machine state.
• VBOX_E_OBJECT_IN_USE: A medium is already attached to this or another virtual machine.
5.74.5 attachDeviceWithoutMedium
void IMachine::attachDeviceWithoutMedium(
[in] wstring name,
[in] long controllerPort,
[in] long device,
[in] DeviceType type)
name Name of the storage controller to attach the device to.
controllerPort Port to attach the device to. For an IDE controller, 0 specifies the primary controller and 1 specifies the secondary controller. For a SCSI controller, this must range from
0 to 15; for a SATA controller, from 0 to 29; for an SAS controller, from 0 to 7.
device Device slot in the given port to attach the device to. This is only relevant for IDE controllers, for which 0 specifies the master device and 1 specifies the slave device. For all
other controller types, this must be 0.
type Device type of the attached device. For media opened by IVirtualBox::openMedium(), this
must match the device type specified there.
Attaches a device and optionally mounts a medium to the given storage controller
(IStorageController, identified by name), at the indicated port and device.
This method is intended for managing storage devices in general while a machine is powered
off. It can be used to attach and detach fixed and removable media. The following kind of media
can be attached to a machine:
• For fixed and removable media, you can pass in a medium that was previously opened
using IVirtualBox::openMedium().
• Only for storage devices supporting removable media (such as DVDs and floppies) with
an empty drive or one of the medium objects listed in the IHost::DVDDrives[] and
IHost::floppyDrives[] arrays to indicate a host drive. For removable devices, you can also
use mountMedium() to change the media while the machine is running.
In a VM’s default configuration of virtual machines, the secondary master of the IDE controller
is used for a CD/DVD drive. IMediumAttachment will appear in the machine’s list of medium
attachments (see mediumAttachments[]).
See IMedium and IMediumAttachment for more information about attaching media.
The specified device slot must not have a device attached to it, or this method will fail.
Note: You cannot attach a device to a newly created machine until this machine’s
settings are saved to disk using saveSettings().
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Note: If the medium is being attached indirectly, a new differencing medium will
implicitly be created for it and attached instead. If the changes made to the machine
settings (including this indirect attachment) are later cancelled using discardSettings(),
this implicitly created differencing medium will implicitly be deleted.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: SATA device, SATA port, IDE port or IDE slot out of range, or file or UUID
not found.
• VBOX_E_INVALID_OBJECT_STATE: Machine must be registered before media can be attached.
• VBOX_E_INVALID_VM_STATE: Invalid machine state.
• VBOX_E_OBJECT_IN_USE: A medium is already attached to this or another virtual machine.
5.74.6 attachHostPCIDevice
void IMachine::attachHostPCIDevice(
[in] long hostAddress,
[in] long desiredGuestAddress,
[in] boolean tryToUnbind)
hostAddress Address of the host PCI device.
desiredGuestAddress Desired position of this device on guest PCI bus.
tryToUnbind If VMM shall try to unbind existing drivers from the device before attaching it to
the guest.
Attaches host PCI device with the given (host) PCI address to the PCI bus of the virtual machine. Please note, that this operation is two phase, as real attachment will happen when VM
will start, and most information will be delivered as IHostPCIDevicePlugEvent on IVirtualBox
event source.
See also: IHostPCIDevicePlugEvent
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine state is not stopped (PCI hotplug not yet
implemented).
• VBOX_E_PDM_ERROR: Virtual machine does not have a PCI controller allowing attachment
of physical devices.
• VBOX_E_NOT_SUPPORTED: Hardware or host OS doesn’t allow PCI device passthrough.
5.74.7 canShowConsoleWindow
boolean IMachine::canShowConsoleWindow()
Returns true if the VM console process can activate the console window and bring it to foreground on the desktop of the host PC.
Note: This method will fail if a session for this machine is not currently open.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Machine session is not open.
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5.74.8 cloneTo
IProgress IMachine::cloneTo(
[in] IMachine target,
[in] CloneMode mode,
[in] CloneOptions options[])
target Target machine object.
mode Which states should be cloned.
options Options for the cloning operation.
Creates a clone of this machine, either as a full clone (which means creating independent
copies of the hard disk media, save states and so on), or as a linked clone (which uses its own
differencing media, sharing the parent media with the source machine).
The target machine object must have been created previously with IVirtualBox::createMachine(),
and all the settings will be transferred except the VM name and the hardware UUID. You can
set the VM name and the new hardware UUID when creating the target machine. The network
MAC addresses are newly created for all network adapters. You can change that behaviour with
the options parameter. The operation is performed asynchronously, so the machine object will
be not be usable until the progress object signals completion.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: target is null.
5.74.9 createSharedFolder
void IMachine::createSharedFolder(
[in] wstring name,
[in] wstring hostPath,
[in] boolean writable,
[in] boolean automount)
name Unique logical name of the shared folder.
hostPath Full path to the shared folder in the host file system.
writable Whether the share is writable or read-only.
automount Whether the share gets automatically mounted by the guest or not.
Creates a new permanent shared folder by associating the given logical name with the given
host path, adds it to the collection of shared folders and starts sharing it. Refer to the description
of ISharedFolder to read more about logical names.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_IN_USE: Shared folder already exists.
• VBOX_E_FILE_ERROR: Shared folder hostPath not accessible.
5.74.10 deleteConfig
IProgress IMachine::deleteConfig(
[in] IMedium media[])
media List of media to be closed and whose storage files will be deleted.
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Deletes the files associated with this machine from disk. If medium objects are passed in
with the aMedia argument, they are closed and, if closing was successful, their storage files are
deleted as well. For convenience, this array of media files can be the same as the one returned
from a previous unregister() call.
This method must only be called on machines which are either write-locked (i.e. on instances
returned by ISession::machine) or on unregistered machines (i.e. not yet registered machines
created by IVirtualBox::createMachine() or opened by IVirtualBox::openMachine(), or after having called unregister()).
The following files will be deleted by this method:
• If unregister() had been previously called with a cleanupMode argument other than “UnregisterOnly”, this will delete all saved state files that the machine had in use; possibly one
if the machine was in “Saved” state and one for each online snapshot that the machine had.
• On each medium object passed in the aMedia array, this will call IMedium::close().
If that succeeds, this will attempt to delete the medium’s storage on disk. Since the
IMedium::close() call will fail if the medium is still in use, e.g. because it is still attached
to a second machine; in that case the storage will not be deleted.
• Finally, the machine’s own XML file will be deleted.
Since deleting large disk image files can be a time-consuming I/O operation, this method operates asynchronously and returns an IProgress object to allow the caller to monitor the progress.
There will be one sub-operation for each file that is being deleted (saved state or medium storage
file).
Note: settingsModified will return true after this method successfully returns.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Machine is registered but not write-locked.
• VBOX_E_IPRT_ERROR: Could not delete the settings file.
5.74.11 deleteGuestProperty
void IMachine::deleteGuestProperty(
[in] wstring name)
name The name of the property to delete.
Deletes an entry from the machine’s guest property store.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Machine session is not open.
5.74.12 detachDevice
void IMachine::detachDevice(
[in] wstring name,
[in] long controllerPort,
[in] long device)
name Name of the storage controller to detach the medium from.
controllerPort Port number to detach the medium from.
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device Device slot number to detach the medium from.
Detaches the device attached to a device slot of the specified bus.
Detaching the device from the virtual machine is deferred. This means that the medium remains associated with the machine when this method returns and gets actually de-associated
only after a successful saveSettings() call. See IMedium for more detailed information about
attaching media.
Note: You cannot detach a device from a running machine.
Note: Detaching differencing media implicitly created by attachDevice() for the
indirect attachment using this method will not implicitly delete them.
The
IMedium::deleteStorage() operation should be explicitly performed by the caller after the medium is successfully detached and the settings are saved with saveSettings(),
if it is the desired action.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Attempt to detach medium from a running virtual machine.
• VBOX_E_OBJECT_NOT_FOUND: No medium attached to given slot/bus.
• VBOX_E_NOT_SUPPORTED: Medium format does not support storage deletion (only for
implicitly created differencing media, should not happen).
5.74.13 detachHostPCIDevice
void IMachine::detachHostPCIDevice(
[in] long hostAddress)
hostAddress Address of the host PCI device.
Detach host PCI device from the virtual machine. Also HostPCIDevicePlugEvent on IVirtualBox
event source will be delivered. As currently we don’t support hot device unplug, IHostPCIDevicePlugEvent event is delivered immediately.
See also: IHostPCIDevicePlugEvent
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine state is not stopped (PCI hotplug not yet
implemented).
• VBOX_E_OBJECT_NOT_FOUND: This host device is not attached to this machine.
• VBOX_E_PDM_ERROR: Virtual machine does not have a PCI controller allowing attachment
of physical devices.
• VBOX_E_NOT_SUPPORTED: Hardware or host OS doesn’t allow PCI device passthrough.
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5.74.14 discardSettings
void IMachine::discardSettings()
Discards any changes to the machine settings made since the session has been opened or since
the last call to saveSettings() or discardSettings().
Note: Calling this method is only valid on instances returned by ISession::machine
and on new machines created by IVirtualBox::createMachine() or opened by
IVirtualBox::openMachine() but not yet registered, or on unregistered machines after
calling unregister().
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine is not mutable.
5.74.15 enumerateGuestProperties
void IMachine::enumerateGuestProperties(
[in] wstring patterns,
[out] wstring names[],
[out] wstring values[],
[out] long long timestamps[],
[out] wstring flags[])
patterns The patterns to match the properties against, separated by ’|’ characters. If this is
empty or null, all properties will match.
names The names of the properties returned.
values The values of the properties returned. The array entries match the corresponding entries
in the name array.
timestamps The time stamps of the properties returned. The array entries match the corresponding entries in the name array.
flags The flags of the properties returned. The array entries match the corresponding entries in
the name array.
Return a list of the guest properties matching a set of patterns along with their values, time
stamps and flags.
5.74.16 exportTo
IVirtualSystemDescription IMachine::exportTo(
[in] IAppliance appliance,
[in] wstring location)
appliance Appliance to export this machine to.
location The target location.
Exports the machine to an OVF appliance. See IAppliance for the steps required to export
VirtualBox machines to OVF.
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5.74.17 findSnapshot
ISnapshot IMachine::findSnapshot(
[in] wstring nameOrId)
nameOrId What to search for. Name or UUID of the snapshot to find
Returns a snapshot of this machine with the given name or UUID.
Returns a snapshot of this machine with the given UUID. A null argument can be used to
obtain the first snapshot taken on this machine. To traverse the whole tree of snapshots starting
from the root, inspect the root snapshot’s ISnapshot::children[] attribute and recurse over those
children.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: Virtual machine has no snapshots or snapshot not found.
5.74.18 getBootOrder
DeviceType IMachine::getBootOrder(
[in] unsigned long position)
position Position in the boot order (1 to the total number of devices the machine can boot from,
as returned by ISystemProperties::maxBootPosition).
Returns the device type that occupies the specified position in the boot order.
@todo [remove?] If the machine can have more than one device of the returned type (such
as hard disks), then a separate method should be used to retrieve the individual device that
occupies the given position.
If here are no devices at the given position, then Null is returned.
@todo getHardDiskBootOrder(), getNetworkBootOrder()
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Boot position out of range.
5.74.19 getCPUIDLeaf
void IMachine::getCPUIDLeaf(
[in] unsigned long id,
[out] unsigned long valEax,
[out] unsigned long valEbx,
[out] unsigned long valEcx,
[out] unsigned long valEdx)
id CPUID leaf index.
valEax CPUID leaf value for register eax.
valEbx CPUID leaf value for register ebx.
valEcx CPUID leaf value for register ecx.
valEdx CPUID leaf value for register edx.
Returns the virtual CPU cpuid information for the specified leaf.
Currently supported index values for cpuid: Standard CPUID leafs: 0 - 0xA Extended CPUID
leafs: 0x80000000 - 0x8000000A
See the Intel and AMD programmer’s manuals for detailed information about the cpuid instruction and its leafs.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Invalid id.
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5.74.20 getCPUProperty
boolean IMachine::getCPUProperty(
[in] CPUPropertyType property)
property Property type to query.
Returns the virtual CPU boolean value of the specified property.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Invalid property.
5.74.21 getCPUStatus
boolean IMachine::getCPUStatus(
[in] unsigned long cpu)
cpu The CPU id to check for.
Returns the current status of the given CPU.
5.74.22 getExtraData
wstring IMachine::getExtraData(
[in] wstring key)
key Name of the data key to get.
Returns associated machine-specific extra data.
If the requested data key does not exist, this function will succeed and return an empty string
in the value argument.
If this method fails, the following error codes may be reported:
• VBOX_E_FILE_ERROR: Settings file not accessible.
• VBOX_E_XML_ERROR: Could not parse the settings file.
5.74.23 getExtraDataKeys
wstring[] IMachine::getExtraDataKeys()
Returns an array representing the machine-specific extra data keys which currently have values
defined.
5.74.24 getGuestProperty
void IMachine::getGuestProperty(
[in] wstring name,
[out] wstring value,
[out] long long timestamp,
[out] wstring flags)
name The name of the property to read.
value The value of the property. If the property does not exist then this will be empty.
timestamp The time at which the property was last modified, as seen by the server process.
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flags Additional property parameters, passed as a comma-separated list of “name=value” type
entries.
Reads an entry from the machine’s guest property store.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Machine session is not open.
5.74.25 getGuestPropertyTimestamp
long long IMachine::getGuestPropertyTimestamp(
[in] wstring property)
property The name of the property to read.
Reads a property timestamp from the machine’s guest property store.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Machine session is not open.
5.74.26 getGuestPropertyValue
wstring IMachine::getGuestPropertyValue(
[in] wstring property)
property The name of the property to read.
Reads a value from the machine’s guest property store.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Machine session is not open.
5.74.27 getHWVirtExProperty
boolean IMachine::getHWVirtExProperty(
[in] HWVirtExPropertyType property)
property Property type to query.
Returns the value of the specified hardware virtualization boolean property.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Invalid property.
5.74.28 getMedium
IMedium IMachine::getMedium(
[in] wstring name,
[in] long controllerPort,
[in] long device)
name Name of the storage controller the medium is attached to.
controllerPort Port to query.
device Device slot in the given port to query.
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Returns the virtual medium attached to a device slot of the specified bus.
Note that if the medium was indirectly attached by mountMedium() to the given device slot
then this method will return not the same object as passed to the mountMedium() call. See
IMedium for more detailed information about mounting a medium.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: No medium attached to given slot/bus.
5.74.29 getMediumAttachment
IMediumAttachment IMachine::getMediumAttachment(
[in] wstring name,
[in] long controllerPort,
[in] long device)
name
controllerPort
device
Returns a medium attachment which corresponds to the controller with the given name, on
the given port and device slot.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: No attachment exists for the given controller/port/device
combination.
5.74.30 getMediumAttachmentsOfController
IMediumAttachment[] IMachine::getMediumAttachmentsOfController(
[in] wstring name)
name
Returns an array of medium attachments which are attached to the the controller with the
given name.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: A storage controller with given name doesn’t exist.
5.74.31 getNetworkAdapter
INetworkAdapter IMachine::getNetworkAdapter(
[in] unsigned long slot)
slot
Returns the network adapter associated with the given slot. Slots are numbered sequentially, starting with zero. The total number of adapters per machine is defined by the
ISystemProperties::getMaxNetworkAdapters() property, so the maximum slot number is one less
than that property’s value.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Invalid slot number.
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5.74.32 getParallelPort
IParallelPort IMachine::getParallelPort(
[in] unsigned long slot)
slot
Returns the parallel port associated with the given slot. Slots are numbered sequentially, starting with zero. The total number of parallel ports per machine is defined by the
ISystemProperties::parallelPortCount property, so the maximum slot number is one less than
that property’s value.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Invalid slot number.
5.74.33 getSerialPort
ISerialPort IMachine::getSerialPort(
[in] unsigned long slot)
slot
Returns the serial port associated with the given slot. Slots are numbered sequentially, starting with zero. The total number of serial ports per machine is defined by the
ISystemProperties::serialPortCount property, so the maximum slot number is one less than
that property’s value.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Invalid slot number.
5.74.34 getStorageControllerByInstance
IStorageController IMachine::getStorageControllerByInstance(
[in] unsigned long instance)
instance
Returns a storage controller with the given instance number.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: A storage controller with given instance number doesn’t
exist.
5.74.35 getStorageControllerByName
IStorageController IMachine::getStorageControllerByName(
[in] wstring name)
name
Returns a storage controller with the given name.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: A storage controller with given name doesn’t exist.
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5.74.36 getUSBControllerByName
IUSBController IMachine::getUSBControllerByName(
[in] wstring name)
name
Returns a USB controller with the given type.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: A USB controller with given name doesn’t exist.
5.74.37 getUSBControllerCountByType
unsigned long IMachine::getUSBControllerCountByType(
[in] USBControllerType type)
type
Returns the number of USB controllers of the given type attached to the VM.
5.74.38 hotPlugCPU
void IMachine::hotPlugCPU(
[in] unsigned long cpu)
cpu The CPU id to insert.
Plugs a CPU into the machine.
5.74.39 hotUnplugCPU
void IMachine::hotUnplugCPU(
[in] unsigned long cpu)
cpu The CPU id to remove.
Removes a CPU from the machine.
5.74.40 launchVMProcess
IProgress IMachine::launchVMProcess(
[in] ISession session,
[in] wstring type,
[in] wstring environment)
session Client session object to which the VM process will be connected (this must be in “Unlocked” state).
type Front-end to use for the new VM process. The following are currently supported:
• "gui": VirtualBox Qt GUI front-end
• "headless": VBoxHeadless (VRDE Server) front-end
• "sdl": VirtualBox SDL front-end
• "emergencystop": reserved value, used for aborting the currently running VM or
session owner. In this case the session parameter may be null (if it is non-null
it isn’t used in any way), and the progress return value will be always null. The
operation completes immediately.
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• "": use the per-VM default frontend if set, otherwise the global default defined in
the system properties. If neither are set, the API will launch a "gui" session, which
may fail if there is no windowing environment available. See defaultFrontend and
ISystemProperties::defaultFrontend.
environment Environment to pass to the VM process.
Spawns a new process that will execute the virtual machine and obtains a shared lock on the
machine for the calling session.
If launching the VM succeeds, the new VM process will create its own session and write-lock
the machine for it, preventing conflicting changes from other processes. If the machine is already
locked (because it is already running or because another session has a write lock), launching the
VM process will therefore fail. Reversely, future attempts to obtain a write lock will also fail
while the machine is running.
The caller’s session object remains separate from the session opened by the new VM process.
It receives its own IConsole object which can be used to control machine execution, but it cannot
be used to change all VM settings which would be available after a lockMachine() call.
The caller must eventually release the session’s shared lock by calling ISession::unlockMachine()
on the local session object once this call has returned. However, the session’s state (see
ISession::state) will not return to “Unlocked” until the remote session has also unlocked the
machine (i.e. the machine has stopped running).
Launching a VM process can take some time (a new VM is started in a new process, for which
memory and other resources need to be set up). Because of this, an IProgress object is returned to
allow the caller to wait for this asynchronous operation to be completed. Until then, the caller’s
session object remains in the “Unlocked” state, and its ISession::machine and ISession::console
attributes cannot be accessed. It is recommended to use IProgress::waitForCompletion() or similar calls to wait for completion. Completion is signalled when the VM is powered on. If launching
the VM fails, error messages can be queried via the progress object, if available.
The progress object will have at least 2 sub-operations. The first operation covers the
period up to the new VM process calls powerUp. The subsequent operations mirror the
IConsole::powerUp() progress object. Because IConsole::powerUp() may require some extra
sub-operations, the IProgress::operationCount may change at the completion of operation.
For details on the teleportation progress operation, see IConsole::powerUp().
The environment argument is a string containing definitions of environment variables in the
following format:
NAME[=VALUE]\n
NAME[=VALUE]\n
...
where \\n is the new line character. These environment variables will be appended to the
environment of the VirtualBox server process. If an environment variable exists both in the server
process and in this list, the value from this list takes precedence over the server’s variable. If the
value of the environment variable is omitted, this variable will be removed from the resulting
environment. If the environment string is null or empty, the server environment is inherited by
the started process as is.
If this method fails, the following error codes may be reported:
• E_UNEXPECTED: Virtual machine not registered.
• E_INVALIDARG: Invalid session type type.
• VBOX_E_OBJECT_NOT_FOUND: No machine matching machineId found.
• VBOX_E_INVALID_OBJECT_STATE: Session already open or being opened.
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• VBOX_E_IPRT_ERROR: Launching process for machine failed.
• VBOX_E_VM_ERROR: Failed to assign machine to session.
5.74.41 lockMachine
void IMachine::lockMachine(
[in] ISession session,
[in] LockType lockType)
session Session object for which the machine will be locked.
lockType If set to Write, then attempt to acquire an exclusive write lock or fail. If set to Shared,
then either acquire an exclusive write lock or establish a link to an existing session.
Locks the machine for the given session to enable the caller to make changes to the machine
or start the VM or control VM execution.
There are two ways to lock a machine for such uses:
• If you want to make changes to the machine settings, you must obtain an exclusive write
lock on the machine by setting lockType to Write.
This will only succeed if no other process has locked the machine to prevent conflicting
changes. Only after an exclusive write lock has been obtained using this method, one
can change all VM settings or execute the VM in the process space of the session object.
(Note that the latter is only of interest if you actually want to write a new front-end for
virtual machines; but this API gets called internally by the existing front-ends such as
VBoxHeadless and the VirtualBox GUI to acquire a write lock on the machine that they are
running.)
On success, write-locking the machine for a session creates a second copy of the IMachine
object. It is this second object upon which changes can be made; in VirtualBox terminology,
the second copy is “mutable”. It is only this second, mutable machine object upon which
you can call methods that change the machine state. After having called this method, you
can obtain this second, mutable machine object using the ISession::machine attribute.
• If you only want to check the machine state or control machine execution without actually
changing machine settings (e.g. to get access to VM statistics or take a snapshot or save
the machine state), then set the lockType argument to Shared.
If no other session has obtained a lock, you will obtain an exclusive write lock as described
above. However, if another session has already obtained such a lock, then a link to that
existing session will be established which allows you to control that existing session.
To find out which type of lock was obtained, you can inspect ISession::type, which will
have been set to either WriteLock or Shared.
In either case, you can get access to the IConsole object which controls VM execution.
Also in all of the above cases, one must always call ISession::unlockMachine() to release the
lock on the machine, or the machine’s state will eventually be set to “Aborted”.
To change settings on a machine, the following sequence is typically performed:
1. Call this method to obtain an exclusive write lock for the current session.
2. Obtain a mutable IMachine object from ISession::machine.
3. Change the settings of the machine by invoking IMachine methods.
4. Call saveSettings().
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5. Release the write lock by calling ISession::unlockMachine().
If this method fails, the following error codes may be reported:
• E_UNEXPECTED: Virtual machine not registered.
• E_ACCESSDENIED: Process not started by OpenRemoteSession.
• VBOX_E_INVALID_OBJECT_STATE: Session already open or being opened.
• VBOX_E_VM_ERROR: Failed to assign machine to session.
5.74.42 mountMedium
void IMachine::mountMedium(
[in] wstring name,
[in] long controllerPort,
[in] long device,
[in] IMedium medium,
[in] boolean force)
name Name of the storage controller to attach the medium to.
controllerPort Port to attach the medium to.
device Device slot in the given port to attach the medium to.
medium Medium to mount or null for an empty drive.
force Allows to force unmount/mount of a medium which is locked by the device slot in the
given port to attach the medium to.
Mounts a medium (IMedium, identified by the given UUID id) to the given storage controller
(IStorageController, identified by name), at the indicated port and device. The device must
already exist; see attachDevice() for how to attach a new device.
This method is intended only for managing removable media, where the device is fixed but
media is changeable at runtime (such as DVDs and floppies). It cannot be used for fixed media
such as hard disks.
The controllerPort and device parameters specify the device slot and have have the same
meaning as with attachDevice().
The specified device slot can have a medium mounted, which will be unmounted first. Specifying a zero UUID (or an empty string) for medium does just an unmount.
See IMedium for more detailed information about attaching media.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: SATA device, SATA port, IDE port or IDE slot out of range.
• VBOX_E_INVALID_OBJECT_STATE: Attempt to attach medium to an unregistered virtual
machine.
• VBOX_E_INVALID_VM_STATE: Invalid machine state.
• VBOX_E_OBJECT_IN_USE: Medium already attached to this or another virtual machine.
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5.74.43 nonRotationalDevice
void IMachine::nonRotationalDevice(
[in] wstring name,
[in] long controllerPort,
[in] long device,
[in] boolean nonRotational)
name Name of the storage controller.
controllerPort Storage controller port.
device Device slot in the given port.
nonRotational New value for the non-rotational device flag.
Sets a flag in the device information which indicates that the medium is not based on rotational
technology, i.e. that the access times are more or less independent of the position on the medium.
This may or may not be supported by a particular drive, and is silently ignored in the latter
case. At the moment only hard disks (which is a misnomer in this context) accept this setting.
Changing the setting while the VM is running is forbidden. The device must already exist; see
attachDevice() for how to attach a new device.
The controllerPort and device parameters specify the device slot and have have the same
meaning as with attachDevice().
If this method fails, the following error codes may be reported:
• E_INVALIDARG: SATA device, SATA port, IDE port or IDE slot out of range.
• VBOX_E_INVALID_OBJECT_STATE: Attempt to modify an unregistered virtual machine.
• VBOX_E_INVALID_VM_STATE: Invalid machine state.
5.74.44 passthroughDevice
void IMachine::passthroughDevice(
[in] wstring name,
[in] long controllerPort,
[in] long device,
[in] boolean passthrough)
name Name of the storage controller.
controllerPort Storage controller port.
device Device slot in the given port.
passthrough New value for the passthrough setting.
Sets the passthrough mode of an existing DVD device. Changing the setting while the VM is
running is forbidden. The setting is only used if at VM start the device is configured as a host
DVD drive, in all other cases it is ignored. The device must already exist; see attachDevice() for
how to attach a new device.
The controllerPort and device parameters specify the device slot and have have the same
meaning as with attachDevice().
If this method fails, the following error codes may be reported:
• E_INVALIDARG: SATA device, SATA port, IDE port or IDE slot out of range.
• VBOX_E_INVALID_OBJECT_STATE: Attempt to modify an unregistered virtual machine.
• VBOX_E_INVALID_VM_STATE: Invalid machine state.
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5.74.45 queryLogFilename
wstring IMachine::queryLogFilename(
[in] unsigned long idx)
idx Which log file name to query. 0=current log file.
Queries for the VM log file name of an given index. Returns an empty string if a log file with
that index doesn’t exists.
5.74.46 querySavedGuestScreenInfo
void IMachine::querySavedGuestScreenInfo(
[in] unsigned long screenId,
[out] unsigned long originX,
[out] unsigned long originY,
[out] unsigned long width,
[out] unsigned long height,
[out] boolean enabled)
screenId Saved guest screen to query info from.
originX The X position of the guest monitor top left corner.
originY The Y position of the guest monitor top left corner.
width Guest width at the time of the saved state was taken.
height Guest height at the time of the saved state was taken.
enabled Whether the monitor is enabled in the guest.
Returns the guest dimensions from the saved state.
5.74.47 querySavedScreenshotPNGSize
void IMachine::querySavedScreenshotPNGSize(
[in] unsigned long screenId,
[out] unsigned long size,
[out] unsigned long width,
[out] unsigned long height)
screenId Saved guest screen to query info from.
size Size of buffer required to store the PNG binary data.
width Image width.
height Image height.
Returns size in bytes and dimensions of a saved PNG image of screenshot from saved state.
5.74.48 querySavedThumbnailSize
void IMachine::querySavedThumbnailSize(
[in] unsigned long screenId,
[out] unsigned long size,
[out] unsigned long width,
[out] unsigned long height)
192
5 Classes (interfaces)
screenId Saved guest screen to query info from.
size Size of buffer required to store the bitmap.
width Bitmap width.
height Bitmap height.
Returns size in bytes and dimensions in pixels of a saved thumbnail bitmap from saved state.
5.74.49 readLog
octet[] IMachine::readLog(
[in] unsigned long idx,
[in] long long offset,
[in] long long size)
idx Which log file to read. 0=current log file.
offset Offset in the log file.
size Chunk size to read in the log file.
Reads the VM log file. The chunk size is limited, so even if you ask for a big piece there might
be less data returned.
5.74.50 readSavedScreenshotPNGToArray
octet[] IMachine::readSavedScreenshotPNGToArray(
[in] unsigned long screenId,
[out] unsigned long width,
[out] unsigned long height)
screenId Saved guest screen to read from.
width Image width.
height Image height.
Screenshot in PNG format is retrieved to an array of bytes.
5.74.51 readSavedThumbnailPNGToArray
octet[] IMachine::readSavedThumbnailPNGToArray(
[in] unsigned long screenId,
[out] unsigned long width,
[out] unsigned long height)
screenId Saved guest screen to read from.
width Image width.
height Image height.
Thumbnail in PNG format is retrieved to an array of bytes.
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5.74.52 readSavedThumbnailToArray
octet[] IMachine::readSavedThumbnailToArray(
[in] unsigned long screenId,
[in] boolean BGR,
[out] unsigned long width,
[out] unsigned long height)
screenId Saved guest screen to read from.
BGR How to order bytes in the pixel. A pixel consists of 4 bytes. If this parameter is true, then
bytes order is: B, G, R, 0xFF. If this parameter is false, then bytes order is: R, G, B, 0xFF.
width Bitmap width.
height Bitmap height.
Thumbnail is retrieved to an array of bytes in uncompressed 32-bit BGRA or RGBA format.
5.74.53 removeAllCPUIDLeaves
void IMachine::removeAllCPUIDLeaves()
Removes all the virtual CPU cpuid leaves
5.74.54 removeCPUIDLeaf
void IMachine::removeCPUIDLeaf(
[in] unsigned long id)
id CPUID leaf index.
Removes the virtual CPU cpuid leaf for the specified index
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Invalid id.
5.74.55 removeSharedFolder
void IMachine::removeSharedFolder(
[in] wstring name)
name Logical name of the shared folder to remove.
Removes the permanent shared folder with the given name previously created by
createSharedFolder() from the collection of shared folders and stops sharing it.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine is not mutable.
• VBOX_E_OBJECT_NOT_FOUND: Shared folder name does not exist.
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5.74.56 removeStorageController
void IMachine::removeStorageController(
[in] wstring name)
name
Removes a storage controller from the machine with all devices attached to it.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: A storage controller with given name doesn’t exist.
• VBOX_E_NOT_SUPPORTED: Medium format does not support storage deletion (only for
implicitly created differencing media, should not happen).
5.74.57 removeUSBController
void IMachine::removeUSBController(
[in] wstring name)
name
Removes a USB controller from the machine.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: A USB controller with given type doesn’t exist.
5.74.58 saveSettings
void IMachine::saveSettings()
Saves any changes to machine settings made since the session has been opened or a new machine has been created, or since the last call to saveSettings() or discardSettings(). For registered
machines, new settings become visible to all other VirtualBox clients after successful invocation
of this method.
Note: The method sends IMachineDataChangedEvent notification event after the configuration has been successfully saved (only for registered machines).
Note: Calling this method is only valid on instances returned by ISession::machine and
on new machines created by IVirtualBox::createMachine() but not yet registered, or on
unregistered machines after calling unregister().
If this method fails, the following error codes may be reported:
• VBOX_E_FILE_ERROR: Settings file not accessible.
• VBOX_E_XML_ERROR: Could not parse the settings file.
• E_ACCESSDENIED: Modification request refused.
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5.74.59 setAutoDiscardForDevice
void IMachine::setAutoDiscardForDevice(
[in] wstring name,
[in] long controllerPort,
[in] long device,
[in] boolean discard)
name Name of the storage controller.
controllerPort Storage controller port.
device Device slot in the given port.
discard New value for the discard device flag.
Sets a flag in the device information which indicates that the medium supports discarding
unused blocks (called trimming for SATA or unmap for SCSI devices) .This may or may not be
supported by a particular drive, and is silently ignored in the latter case. At the moment only
hard disks (which is a misnomer in this context) accept this setting. Changing the setting while
the VM is running is forbidden. The device must already exist; see attachDevice() for how to
attach a new device.
The controllerPort and device parameters specify the device slot and have have the same
meaning as with attachDevice().
If this method fails, the following error codes may be reported:
• E_INVALIDARG: SATA device, SATA port, SCSI port out of range.
• VBOX_E_INVALID_OBJECT_STATE: Attempt to modify an unregistered virtual machine.
• VBOX_E_INVALID_VM_STATE: Invalid machine state.
5.74.60 setBandwidthGroupForDevice
void IMachine::setBandwidthGroupForDevice(
[in] wstring name,
[in] long controllerPort,
[in] long device,
[in] IBandwidthGroup bandwidthGroup)
name Name of the storage controller.
controllerPort Storage controller port.
device Device slot in the given port.
bandwidthGroup New value for the bandwidth group or null for no group.
Sets the bandwidth group of an existing storage device. The device must already exist; see
attachDevice() for how to attach a new device.
The controllerPort and device parameters specify the device slot and have have the same
meaning as with attachDevice().
If this method fails, the following error codes may be reported:
• E_INVALIDARG: SATA device, SATA port, IDE port or IDE slot out of range.
• VBOX_E_INVALID_OBJECT_STATE: Attempt to modify an unregistered virtual machine.
• VBOX_E_INVALID_VM_STATE: Invalid machine state.
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5.74.61 setBootOrder
void IMachine::setBootOrder(
[in] unsigned long position,
[in] DeviceType device)
position Position in the boot order (1 to the total number of devices the machine can boot from,
as returned by ISystemProperties::maxBootPosition).
device The type of the device used to boot at the given position.
Puts the given device to the specified position in the boot order.
To indicate that no device is associated with the given position, Null should be used.
@todo setHardDiskBootOrder(), setNetworkBootOrder()
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Boot position out of range.
• E_NOTIMPL: Booting from USB device currently not supported.
5.74.62 setCPUIDLeaf
void IMachine::setCPUIDLeaf(
[in] unsigned long
[in] unsigned long
[in] unsigned long
[in] unsigned long
[in] unsigned long
id,
valEax,
valEbx,
valEcx,
valEdx)
id CPUID leaf index.
valEax CPUID leaf value for register eax.
valEbx CPUID leaf value for register ebx.
valEcx CPUID leaf value for register ecx.
valEdx CPUID leaf value for register edx.
Sets the virtual CPU cpuid information for the specified leaf. Note that these values are not
passed unmodified. VirtualBox clears features that it doesn’t support.
Currently supported index values for cpuid: Standard CPUID leafs: 0 - 0xA Extended CPUID
leafs: 0x80000000 - 0x8000000A
See the Intel and AMD programmer’s manuals for detailed information about the cpuid instruction and its leafs.
Do not use this method unless you know exactly what you’re doing. Misuse can lead to random
crashes inside VMs.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Invalid id.
5.74.63 setCPUProperty
void IMachine::setCPUProperty(
[in] CPUPropertyType property,
[in] boolean value)
property Property type to query.
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value Property value.
Sets the virtual CPU boolean value of the specified property.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Invalid property.
5.74.64 setExtraData
void IMachine::setExtraData(
[in] wstring key,
[in] wstring value)
key Name of the data key to set.
value Value to assign to the key.
Sets associated machine-specific extra data.
If you pass null or an empty string as a key value, the given key will be deleted.
Note: Before performing the actual data change, this method will ask all registered
listeners using the IExtraDataCanChangeEvent notification for a permission. If one of
the listeners refuses the new value, the change will not be performed.
Note: On success, the IExtraDataChangedEvent notification is called to inform all registered listeners about a successful data change.
Note: This method can be called outside the machine session and therefore it’s a caller’s
responsibility to handle possible race conditions when several clients change the same
key at the same time.
If this method fails, the following error codes may be reported:
• VBOX_E_FILE_ERROR: Settings file not accessible.
• VBOX_E_XML_ERROR: Could not parse the settings file.
5.74.65 setGuestProperty
void IMachine::setGuestProperty(
[in] wstring property,
[in] wstring value,
[in] wstring flags)
property The name of the property to set, change or delete.
value The new value of the property to set, change or delete. If the property does not yet exist
and value is non-empty, it will be created. If the value is null or empty, the property will
be deleted if it exists.
flags Additional property parameters, passed as a comma-separated list of “name=value” type
entries.
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Sets, changes or deletes an entry in the machine’s guest property store.
If this method fails, the following error codes may be reported:
• E_ACCESSDENIED: Property cannot be changed.
• E_INVALIDARG: Invalid flags.
• VBOX_E_INVALID_VM_STATE: Virtual machine is not mutable or session not open.
• VBOX_E_INVALID_OBJECT_STATE: Cannot set transient property when machine not running.
5.74.66 setGuestPropertyValue
void IMachine::setGuestPropertyValue(
[in] wstring property,
[in] wstring value)
property The name of the property to set or change.
value The new value of the property to set or change. If the property does not yet exist and
value is non-empty, it will be created.
Sets or changes a value in the machine’s guest property store. The flags field will be left
unchanged or created empty for a new property.
If this method fails, the following error codes may be reported:
• E_ACCESSDENIED: Property cannot be changed.
• VBOX_E_INVALID_VM_STATE: Virtual machine is not mutable or session not open.
• VBOX_E_INVALID_OBJECT_STATE: Cannot set transient property when machine not running.
5.74.67 setHWVirtExProperty
void IMachine::setHWVirtExProperty(
[in] HWVirtExPropertyType property,
[in] boolean value)
property Property type to set.
value New property value.
Sets a new value for the specified hardware virtualization boolean property.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Invalid property.
5.74.68 setHotPluggableForDevice
void IMachine::setHotPluggableForDevice(
[in] wstring name,
[in] long controllerPort,
[in] long device,
[in] boolean hotPluggable)
name Name of the storage controller.
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5 Classes (interfaces)
controllerPort Storage controller port.
device Device slot in the given port.
hotPluggable New value for the hot-pluggable device flag.
Sets a flag in the device information which indicates that the attached device is hot pluggable
or not. This may or may not be supported by a particular controller and/or drive, and is silently
ignored in the latter case. Changing the setting while the VM is running is forbidden. The device
must already exist; see attachDevice() for how to attach a new device.
The controllerPort and device parameters specify the device slot and have have the same
meaning as with attachDevice().
If this method fails, the following error codes may be reported:
• E_INVALIDARG: SATA device, SATA port, IDE port or IDE slot out of range.
• VBOX_E_INVALID_OBJECT_STATE: Attempt to modify an unregistered virtual machine.
• VBOX_E_INVALID_VM_STATE: Invalid machine state.
• VBOX_E_NOT_SUPPORTED: Controller doesn’t support hot plugging.
5.74.69 setNoBandwidthGroupForDevice
void IMachine::setNoBandwidthGroupForDevice(
[in] wstring name,
[in] long controllerPort,
[in] long device)
name Name of the storage controller.
controllerPort Storage controller port.
device Device slot in the given port.
Sets no bandwidth group for an existing storage device. The device must already exist; see
attachDevice() for how to attach a new device. The controllerPort and device parameters
specify the device slot and have have the same meaning as with attachDevice().
If this method fails, the following error codes may be reported:
• E_INVALIDARG: SATA device, SATA port, IDE port or IDE slot out of range.
• VBOX_E_INVALID_OBJECT_STATE: Attempt to modify an unregistered virtual machine.
• VBOX_E_INVALID_VM_STATE: Invalid machine state.
5.74.70 setSettingsFilePath
IProgress IMachine::setSettingsFilePath(
[in] wstring settingsFilePath)
settingsFilePath New settings file path, will be used to determine the new location for the
attached media if it is in the same directory or below as the original settings file.
Currently, it is an error to change this property on any machine. Later this will allow setting a
new path for the settings file, with automatic relocation of all files (including snapshots and disk
images) which are inside the base directory. This operation is only allowed when there are no
pending unsaved settings.
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Note: Setting this property to null or to an empty string is forbidden. When setting
this property, the specified path must be absolute. The specified path may not exist, it
will be created when necessary.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The operation is not implemented yet.
5.74.71 setStorageControllerBootable
void IMachine::setStorageControllerBootable(
[in] wstring name,
[in] boolean bootable)
name
bootable
Sets the bootable flag of the storage controller with the given name.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: A storage controller with given name doesn’t exist.
• VBOX_E_OBJECT_IN_USE: Another storage controller is marked as bootable already.
5.74.72 showConsoleWindow
long long IMachine::showConsoleWindow()
Activates the console window and brings it to foreground on the desktop of the host PC. Many
modern window managers on many platforms implement some sort of focus stealing prevention
logic, so that it may be impossible to activate a window without the help of the currently active
application. In this case, this method will return a non-zero identifier that represents the toplevel window of the VM console process. The caller, if it represents a currently active process,
is responsible to use this identifier (in a platform-dependent manner) to perform actual window
activation.
Note: This method will fail if a session for this machine is not currently open.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Machine session is not open.
5.74.73 temporaryEjectDevice
void IMachine::temporaryEjectDevice(
[in] wstring name,
[in] long controllerPort,
[in] long device,
[in] boolean temporaryEject)
name Name of the storage controller.
controllerPort Storage controller port.
device Device slot in the given port.
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temporaryEject New value for the eject behavior.
Sets the behavior for guest-triggered medium eject. In some situations it is desirable that such
ejects update the VM configuration, and in others the eject should keep the VM configuration.
The device must already exist; see attachDevice() for how to attach a new device.
The controllerPort and device parameters specify the device slot and have have the same
meaning as with attachDevice().
If this method fails, the following error codes may be reported:
• E_INVALIDARG: SATA device, SATA port, IDE port or IDE slot out of range.
• VBOX_E_INVALID_OBJECT_STATE: Attempt to modify an unregistered virtual machine.
• VBOX_E_INVALID_VM_STATE: Invalid machine state.
5.74.74 unmountMedium
void IMachine::unmountMedium(
[in] wstring name,
[in] long controllerPort,
[in] long device,
[in] boolean force)
name Name of the storage controller to unmount the medium from.
controllerPort Port to unmount the medium from.
device Device slot in the given port to unmount the medium from.
force Allows to force unmount of a medium which is locked by the device slot in the given port
medium is attached to.
Unmounts any currently mounted medium (IMedium, identified by the given UUID id) to
the given storage controller (IStorageController, identified by name), at the indicated port and
device. The device must already exist;
This method is intended only for managing removable media, where the device is fixed but
media is changeable at runtime (such as DVDs and floppies). It cannot be used for fixed media
such as hard disks.
The controllerPort and device parameters specify the device slot and have have the same
meaning as with attachDevice().
The specified device slot must have a medium mounted, which will be unmounted. If there
is no mounted medium it will do nothing. See IMedium for more detailed information about
attaching/unmounting media.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: SATA device, SATA port, IDE port or IDE slot out of range.
• VBOX_E_INVALID_OBJECT_STATE: Attempt to unmount medium that is not removable not DVD or floppy.
• VBOX_E_INVALID_VM_STATE: Invalid machine state.
• VBOX_E_OBJECT_IN_USE: Medium already attached to this or another virtual machine.
• VBOX_E_OBJECT_NOT_FOUND: Medium not attached to specified port, device, controller.
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5 Classes (interfaces)
5.74.75 unregister
IMedium[] IMachine::unregister(
[in] CleanupMode cleanupMode)
cleanupMode How to clean up after the machine has been unregistered.
Unregisters a machine previously registered with IVirtualBox::registerMachine() and optionally do additional cleanup before the machine is unregistered.
This method does not delete any files. It only changes the machine configuration and the
list of registered machines in the VirtualBox object. To delete the files which belonged to the
machine, including the XML file of the machine itself, call deleteConfig(), optionally with the
array of IMedium objects which was returned from this method.
How thoroughly this method cleans up the machine configuration before unregistering the
machine depends on the cleanupMode argument.
• With “UnregisterOnly”, the machine will only be unregistered, but no additional cleanup
will be performed. The call will fail if the machine is in “Saved” state or has any snapshots
or any media attached (see IMediumAttachment). It is the responsibility of the caller to
delete all such configuration in this mode. In this mode, the API behaves like the former
IVirtualBox::unregisterMachine() API which it replaces.
• With “DetachAllReturnNone”, the call will succeed even if the machine is in “Saved” state
or if it has snapshots or media attached. All media attached to the current machine state
or in snapshots will be detached. No medium objects will be returned; all of the machine’s
media will remain open.
• With “DetachAllReturnHardDisksOnly”, the call will behave like with “DetachAllReturnNone”, except that all the hard disk medium objects which were detached from the machine
will be returned as an array. This allows for quickly passing them to the deleteConfig() API
for closing and deletion.
• With “Full”, the call will behave like with “DetachAllReturnHardDisksOnly”, except that all
media will be returned in the array, including removable media like DVDs and floppies.
This might be useful if the user wants to inspect in detail which media were attached to the
machine. Be careful when passing the media array to deleteConfig() in that case because
users will typically want to preserve ISO and RAW image files.
A typical implementation will use “DetachAllReturnHardDisksOnly” and then pass the resulting IMedium array to deleteConfig(). This way, the machine is completely deleted with all its
saved states and hard disk images, but images for removable drives (such as ISO and RAW files)
will remain on disk.
This API does not verify whether the media files returned in the array are still attached to
other machines (i.e. shared between several machines). If such a shared image is passed to
deleteConfig() however, closing the image will fail there and the image will be silently skipped.
This API may, however, move media from this machine’s media registry to other media registries (see IMedium for details on media registries). For machines created with VirtualBox 4.0 or
later, if media from this machine’s media registry are also attached to another machine (shared
attachments), each such medium will be moved to another machine’s registry. This is because
without this machine’s media registry, the other machine cannot find its media any more and
would become inaccessible.
This API implicitly calls saveSettings() to save all current machine settings before unregistering it. It may also silently call saveSettings() on other machines if media are moved to other
machines’ media registries.
After successful method invocation, the IMachineRegisteredEvent event is fired.
The call will fail if the machine is currently locked (see ISession).
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5 Classes (interfaces)
Note: If the given machine is inaccessible (see accessible), it will be unregistered and
fully uninitialized right afterwards. As a result, the returned machine object will be
unusable and an attempt to call any method will return the “Object not ready” error.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_OBJECT_STATE: Machine is currently locked for a session.
5.75 IMachineDataChangedEvent (IMachineEvent)
Note: This interface extends IMachineEvent and therefore supports all its methods and
attributes as well.
Any of the settings of the given machine has changed.
5.75.1 Attributes
5.75.1.1 temporary (read-only)
boolean IMachineDataChangedEvent::temporary
true if the settings change is temporary. All permanent settings changes will trigger an event,
and only temporary settings changes for running VMs will trigger an event. Note: sending events
for temporary changes is NOT IMPLEMENTED.
5.76 IMachineDebugger
5.76.1 Attributes
5.76.1.1 singleStep (read/write)
boolean IMachineDebugger::singleStep
Switch for enabling single-stepping.
5.76.1.2 recompileUser (read/write)
boolean IMachineDebugger::recompileUser
Switch for forcing code recompilation for user mode code.
5.76.1.3 recompileSupervisor (read/write)
boolean IMachineDebugger::recompileSupervisor
Switch for forcing code recompilation for supervisor mode code.
5.76.1.4 executeAllInIEM (read/write)
boolean IMachineDebugger::executeAllInIEM
Whether to execute all the code in the instruction interpreter. This is mainly for testing the
interpreter and not an execution mode intended for general consumption.
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5 Classes (interfaces)
5.76.1.5 PATMEnabled (read/write)
boolean IMachineDebugger::PATMEnabled
Switch for enabling and disabling the PATM component.
5.76.1.6 CSAMEnabled (read/write)
boolean IMachineDebugger::CSAMEnabled
Switch for enabling and disabling the CSAM component.
5.76.1.7 logEnabled (read/write)
boolean IMachineDebugger::logEnabled
Switch for enabling and disabling the debug logger.
5.76.1.8 logDbgFlags (read-only)
wstring IMachineDebugger::logDbgFlags
The debug logger flags.
5.76.1.9 logDbgGroups (read-only)
wstring IMachineDebugger::logDbgGroups
The debug logger’s group settings.
5.76.1.10 logDbgDestinations (read-only)
wstring IMachineDebugger::logDbgDestinations
The debug logger’s destination settings.
5.76.1.11 logRelFlags (read-only)
wstring IMachineDebugger::logRelFlags
The release logger flags.
5.76.1.12 logRelGroups (read-only)
wstring IMachineDebugger::logRelGroups
The release logger’s group settings.
5.76.1.13 logRelDestinations (read-only)
wstring IMachineDebugger::logRelDestinations
The relase logger’s destination settings.
5.76.1.14 HWVirtExEnabled (read-only)
boolean IMachineDebugger::HWVirtExEnabled
Flag indicating whether the VM is currently making use of CPU hardware virtualization extensions.
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5 Classes (interfaces)
5.76.1.15 HWVirtExNestedPagingEnabled (read-only)
boolean IMachineDebugger::HWVirtExNestedPagingEnabled
Flag indicating whether the VM is currently making use of the nested paging CPU hardware
virtualization extension.
5.76.1.16 HWVirtExVPIDEnabled (read-only)
boolean IMachineDebugger::HWVirtExVPIDEnabled
Flag indicating whether the VM is currently making use of the VPID VT-x extension.
5.76.1.17 HWVirtExUXEnabled (read-only)
boolean IMachineDebugger::HWVirtExUXEnabled
Flag indicating whether the VM is currently making use of the unrestricted execution feature
of VT-x.
5.76.1.18 OSName (read-only)
wstring IMachineDebugger::OSName
Query the guest OS kernel name as detected by the DBGF.
This feature is not implemented in the 4.0.0 release but may show up in a dot release.
5.76.1.19 OSVersion (read-only)
wstring IMachineDebugger::OSVersion
Query the guest OS kernel version string as detected by the DBGF.
This feature is not implemented in the 4.0.0 release but may show up in a dot release.
5.76.1.20 PAEEnabled (read-only)
boolean IMachineDebugger::PAEEnabled
Flag indicating whether the VM is currently making use of the Physical Address Extension CPU
feature.
5.76.1.21 virtualTimeRate (read/write)
unsigned long IMachineDebugger::virtualTimeRate
The rate at which the virtual time runs expressed as a percentage. The accepted range is 2%
to 20000%.
5.76.1.22 VM (read-only)
long long IMachineDebugger::VM
Gets the user-mode VM handle, with a reference. Must be passed to VMR3ReleaseUVM when
done. This is only for internal use while we carve the details of this interface.
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5.76.2 detectOS
wstring IMachineDebugger::detectOS()
Tries to (re-)detect the guest OS kernel.
This feature is not implemented in the 4.0.0 release but may show up in a dot release.
5.76.3 dumpGuestCore
void IMachineDebugger::dumpGuestCore(
[in] wstring filename,
[in] wstring compression)
filename The name of the output file. The file must not exist.
compression Reserved for future compression method indicator.
Takes a core dump of the guest.
See include/VBox/dbgfcorefmt.h for details on the file format.
5.76.4 dumpGuestStack
wstring IMachineDebugger::dumpGuestStack(
[in] unsigned long cpuId)
cpuId The identifier of the Virtual CPU.
Produce a simple stack dump using the current guest state.
This feature is not implemented in the 4.0.0 release but may show up in a dot release.
5.76.5 dumpHostProcessCore
void IMachineDebugger::dumpHostProcessCore(
[in] wstring filename,
[in] wstring compression)
filename The name of the output file. The file must not exist.
compression Reserved for future compression method indicator.
Takes a core dump of the VM process on the host.
This feature is not implemented in the 4.0.0 release but it may show up in a dot release.
5.76.6 dumpStats
void IMachineDebugger::dumpStats(
[in] wstring pattern)
pattern The selection pattern. A bit similar to filename globbing.
Dumps VM statistics.
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5 Classes (interfaces)
5.76.7 getRegister
wstring IMachineDebugger::getRegister(
[in] unsigned long cpuId,
[in] wstring name)
cpuId The identifier of the Virtual CPU.
name The register name, case is ignored.
Gets one register.
This feature is not implemented in the 4.0.0 release but may show up in a dot release.
5.76.8 getRegisters
void IMachineDebugger::getRegisters(
[in] unsigned long cpuId,
[out] wstring names[],
[out] wstring values[])
cpuId The identifier of the Virtual CPU.
names Array containing the lowercase register names.
values Array parallel to the names holding the register values as if the register was returned by
getRegister().
Gets all the registers for the given CPU.
This feature is not implemented in the 4.0.0 release but may show up in a dot release.
5.76.9 getStats
wstring IMachineDebugger::getStats(
[in] wstring pattern,
[in] boolean withDescriptions)
pattern The selection pattern. A bit similar to filename globbing.
withDescriptions Whether to include the descriptions.
Get the VM statistics in a XMLish format.
5.76.10 info
wstring IMachineDebugger::info(
[in] wstring name,
[in] wstring args)
name The name of the info item.
args Arguments to the info dumper.
Interfaces with the info dumpers (DBGFInfo).
This feature is not implemented in the 4.0.0 release but it may show up in a dot release.
5.76.11 injectNMI
void IMachineDebugger::injectNMI()
Inject an NMI into a running VT-x/AMD-V VM.
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5.76.12 modifyLogDestinations
void IMachineDebugger::modifyLogDestinations(
[in] wstring settings)
settings The destination settings string. See iprt/log.h for details. To target the release logger,
prefix the string with “release:“.
Modifies the debug or release logger destinations.
5.76.13 modifyLogFlags
void IMachineDebugger::modifyLogFlags(
[in] wstring settings)
settings The flags settings string. See iprt/log.h for details. To target the release logger, prefix
the string with “release:“.
Modifies the debug or release logger flags.
5.76.14 modifyLogGroups
void IMachineDebugger::modifyLogGroups(
[in] wstring settings)
settings The group settings string. See iprt/log.h for details. To target the release logger, prefix
the string with “release:“.
Modifies the group settings of the debug or release logger.
5.76.15 readPhysicalMemory
octet[] IMachineDebugger::readPhysicalMemory(
[in] long long address,
[in] unsigned long size)
address The guest physical address.
size The number of bytes to read.
Reads guest physical memory, no side effects (MMIO++).
This feature is not implemented in the 4.0.0 release but may show up in a dot release.
5.76.16 readVirtualMemory
octet[] IMachineDebugger::readVirtualMemory(
[in] unsigned long cpuId,
[in] long long address,
[in] unsigned long size)
cpuId The identifier of the Virtual CPU.
address The guest virtual address.
size The number of bytes to read.
Reads guest virtual memory, no side effects (MMIO++).
This feature is not implemented in the 4.0.0 release but may show up in a dot release.
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5.76.17 resetStats
void IMachineDebugger::resetStats(
[in] wstring pattern)
pattern The selection pattern. A bit similar to filename globbing.
Reset VM statistics.
5.76.18 setRegister
void IMachineDebugger::setRegister(
[in] unsigned long cpuId,
[in] wstring name,
[in] wstring value)
cpuId The identifier of the Virtual CPU.
name The register name, case is ignored.
value The new register value. Hexadecimal, decimal and octal formattings are supported in
addition to any special formattings returned by the getters.
Gets one register.
This feature is not implemented in the 4.0.0 release but may show up in a dot release.
5.76.19 setRegisters
void IMachineDebugger::setRegisters(
[in] unsigned long cpuId,
[in] wstring names[],
[in] wstring values[])
cpuId The identifier of the Virtual CPU.
names Array containing the register names, case ignored.
values Array paralell to the names holding the register values. See setRegister() for formatting
guidelines.
Sets zero or more registers atomically.
This feature is not implemented in the 4.0.0 release but may show up in a dot release.
5.76.20 writePhysicalMemory
void IMachineDebugger::writePhysicalMemory(
[in] long long address,
[in] unsigned long size,
[in] octet bytes[])
address The guest physical address.
size The number of bytes to read.
bytes The bytes to write.
Writes guest physical memory, access handles (MMIO++) are ignored.
This feature is not implemented in the 4.0.0 release but may show up in a dot release.
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5.76.21 writeVirtualMemory
void IMachineDebugger::writeVirtualMemory(
[in] unsigned long cpuId,
[in] long long address,
[in] unsigned long size,
[in] octet bytes[])
cpuId The identifier of the Virtual CPU.
address The guest virtual address.
size The number of bytes to read.
bytes The bytes to write.
Writes guest virtual memory, access handles (MMIO++) are ignored.
This feature is not implemented in the 4.0.0 release but may show up in a dot release.
5.77 IMachineEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Base abstract interface for all machine events.
5.77.1 Attributes
5.77.1.1 machineId (read-only)
uuid IMachineEvent::machineId
ID of the machine this event relates to.
5.78 IMachineRegisteredEvent (IMachineEvent)
Note: This interface extends IMachineEvent and therefore supports all its methods and
attributes as well.
The given machine was registered or unregistered within this VirtualBox installation.
5.78.1 Attributes
5.78.1.1 registered (read-only)
boolean IMachineRegisteredEvent::registered
If true, the machine was registered, otherwise it was unregistered.
5.79 IMachineStateChangedEvent (IMachineEvent)
Note: This interface extends IMachineEvent and therefore supports all its methods and
attributes as well.
Machine state change event.
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5 Classes (interfaces)
5.79.1 Attributes
5.79.1.1 state (read-only)
MachineState IMachineStateChangedEvent::state
New execution state.
5.80 IManagedObjectRef
Note: This interface is supported in the web service only, not in COM/XPCOM.
Managed object reference.
Only within the webservice, a managed object reference (which is really an opaque number)
allows a webservice client to address an object that lives in the address space of the webservice
server.
Behind each managed object reference, there is a COM object that lives in the webservice server’s address space. The COM object is not freed until the managed object reference is released, either by an explicit call to release() or by logging off from the webservice
(IWebsessionManager::logoff()), which releases all objects created during the webservice session.
Whenever a method call of the VirtualBox API returns a COM object, the webservice representation of that method will instead return a managed object reference, which can then be used to
invoke methods on that object.
5.80.1 getInterfaceName
wstring IManagedObjectRef::getInterfaceName()
Returns the name of the interface that this managed object represents, for example, “IMachine”, as a string.
5.80.2 release
void IManagedObjectRef::release()
Releases this managed object reference and frees the resources that were allocated for it in the
webservice server process. After calling this method, the identifier of the reference can no longer
be used.
5.81 IMedium
The IMedium interface represents virtual storage for a machine’s hard disks, CD/DVD or floppy
drives. It will typically represent a disk image on the host, for example a VDI or VMDK file
representing a virtual hard disk, or an ISO or RAW file representing virtual removable media,
but can also point to a network location (e.g. for iSCSI targets).
Instances of IMedium are connected to virtual machines by way of medium attachments, which
link the storage medium to a particular device slot of a storage controller of the virtual machine.
In the VirtualBox API, virtual storage is therefore always represented by the following chain of
object links:
• IMachine::storageControllers[] contains an array of storage controllers (IDE, SATA, SCSI,
SAS or a floppy controller; these are instances of IStorageController).
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• IMachine::mediumAttachments[] contains an array of medium attachments (instances of
IMediumAttachment created by IMachine::attachDevice()), each containing a storage controller from the above array, a port/device specification, and an instance of IMedium representing the medium storage (image file).
For removable media, the storage medium is optional; a medium attachment with no
medium represents a CD/DVD or floppy drive with no medium inserted. By contrast, hard
disk attachments will always have an IMedium object attached.
• Each IMedium in turn points to a storage unit (such as a file on the host computer or
a network resource) that holds actual data. This location is represented by the location
attribute.
Existing media are opened using IVirtualBox::openMedium(); new hard disk media can be
created with the VirtualBox API using the IVirtualBox::createHardDisk() method. Differencing
hard disks (see below) are usually implicitly created by VirtualBox as needed, but may also be
created explicitly using createDiffStorage(). VirtualBox cannot create CD/DVD or floppy images
(ISO and RAW files); these should be created with external tools and then opened from within
VirtualBox.
Only for CD/DVDs and floppies, an IMedium instance can also represent a host drive. In
that case the id attribute contains the UUID of one of the drives in IHost::DVDDrives[] or
IHost::floppyDrives[].
Media registries
When a medium has been opened or created using one of the aforementioned APIs, it becomes “known” to VirtualBox. Known media can be attached to virtual machines and re-found
through IVirtualBox::openMedium(). They also appear in the global IVirtualBox::hardDisks[],
IVirtualBox::DVDImages[] and IVirtualBox::floppyImages[] arrays.
Prior to VirtualBox 4.0, opening a medium added it to a global media registry in the
VirtualBox.xml file, which was shared between all machines and made transporting machines
and their media from one host to another difficult.
Starting with VirtualBox 4.0, media are only added to a registry when they are attached to a
machine using IMachine::attachDevice(). For backwards compatibility, which registry a medium
is added to depends on which VirtualBox version created a machine:
• If the medium has first been attached to a machine which was created by VirtualBox 4.0
or later, it is added to that machine’s media registry in the machine XML settings file. This
way all information about a machine’s media attachments is contained in a single file and
can be transported easily.
• For older media attachments (i.e. if the medium was first attached to a machine which was
created with a VirtualBox version before 4.0), media continue to be registered in the global
VirtualBox settings file, for backwards compatibility.
See IVirtualBox::openMedium() for more information.
Media are removed from media registries by the close(), deleteStorage() and mergeTo() methods.
Accessibility checks
VirtualBox defers media accessibility checks until the refreshState() method is called explicitly
on a medium. This is done to make the VirtualBox object ready for serving requests as fast as
possible and let the end-user application decide if it needs to check media accessibility right away
or not.
As a result, when VirtualBox starts up (e.g. the VirtualBox object gets created for the first time),
all known media are in the “Inaccessible” state, but the value of the lastAccessError attribute is
an empty string because no actual accessibility check has been made yet.
After calling refreshState(), a medium is considered accessible if its storage unit can be read.
In that case, the state attribute has a value of “Created”. If the storage unit cannot be read
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(for example, because it is located on a disconnected network resource, or was accidentally
deleted outside VirtualBox), the medium is considered inaccessible, which is indicated by the
“Inaccessible” state. The exact reason why the medium is inaccessible can be obtained by reading
the lastAccessError attribute.
Medium types
There are five types of medium behavior which are stored in the type attribute (see
MediumType) and which define the medium’s behavior with attachments and snapshots.
All media can be also divided in two groups: base media and differencing media. A base
medium contains all sectors of the medium data in its own storage and therefore can be used
independently. In contrast, a differencing medium is a “delta” to some other medium and contains only those sectors which differ from that other medium, which is then called a parent. The
differencing medium is said to be linked to that parent. The parent may be itself a differencing
medium, thus forming a chain of linked media. The last element in that chain must always be a
base medium. Note that several differencing media may be linked to the same parent medium.
Differencing media can be distinguished from base media by querying the parent attribute:
base media do not have parents they would depend on, so the value of this attribute is always
null for them. Using this attribute, it is possible to walk up the medium tree (from the child
medium to its parent). It is also possible to walk down the tree using the children[] attribute.
Note that the type of all differencing media is “normal”; all other values are meaningless for
them. Base media may be of any type.
Automatic composition of the file name part
Another extension to the location attribute is that there is a possibility to cause VirtualBox to
compose a unique value for the file name part of the location using the UUID of the hard disk.
This applies only to hard disks in NotCreated state, e.g. before the storage unit is created, and
works as follows. You set the value of the location attribute to a location specification which only
contains the path specification but not the file name part and ends with either a forward slash or
a backslash character. In response, VirtualBox will generate a new UUID for the hard disk and
compose the file name using the following pattern:
<path>/{<uuid>}.<ext>
where <path> is the supplied path specification, <uuid> is the newly generated UUID and
<ext> is the default extension for the storage format of this hard disk. After that, you may call
any of the methods that create a new hard disk storage unit and they will use the generated
UUID and file name.
5.81.1 Attributes
5.81.1.1 id (read-only)
uuid IMedium::id
UUID of the medium. For a newly created medium, this value is a randomly generated UUID.
Note: For media in one of MediumState_NotCreated, MediumState_Creating or MediumState_Deleting states, the value of this property is undefined and will most likely be
an empty UUID.
5.81.1.2 description (read/write)
wstring IMedium::description
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Optional description of the medium. For a newly created medium the value of this attribute is
an empty string.
Medium types that don’t support this attribute will return E_NOTIMPL in attempt to get or set
this attribute’s value.
Note: For some storage types, reading this attribute may return an outdated (last
known) value when state is Inaccessible or LockedWrite because the value of this attribute is stored within the storage unit itself. Also note that changing the attribute
value is not possible in such case, as well as when the medium is the LockedRead state.
5.81.1.3 state (read-only)
MediumState IMedium::state
Returns the current medium state, which is the last state set by the accessibility check performed by refreshState(). If that method has not yet been called on the medium, the state is
“Inaccessible”; as opposed to truly inaccessible media, the value of lastAccessError will be an
empty string in that case.
Note: As of version 3.1, this no longer performs an accessibility check automatically;
call refreshState() for that.
5.81.1.4 variant (read-only)
MediumVariant IMedium::variant[]
Returns the storage format variant information for this medium as an array of the flags described at MediumVariant. Before refreshState() is called this method returns an undefined
value.
5.81.1.5 location (read-only)
wstring IMedium::location
Location of the storage unit holding medium data.
The format of the location string is medium type specific. For medium types using regular files
in a host’s file system, the location string is the full file name.
5.81.1.6 name (read-only)
wstring IMedium::name
Name of the storage unit holding medium data.
The returned string is a short version of the location attribute that is suitable for representing the medium in situations where the full location specification is too long (such as lists and
comboboxes in GUI frontends). This string is also used by frontends to sort the media list alphabetically when needed.
For example, for locations that are regular files in the host’s file system, the value of this
attribute is just the file name (+ extension), without the path specification.
Note that as opposed to the location attribute, the name attribute will not necessary be unique
for a list of media of the given type and format.
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5.81.1.7 deviceType (read-only)
DeviceType IMedium::deviceType
Kind of device (DVD/Floppy/HardDisk) which is applicable to this medium.
5.81.1.8 hostDrive (read-only)
boolean IMedium::hostDrive
True if this corresponds to a drive on the host.
5.81.1.9 size (read-only)
long long IMedium::size
Physical size of the storage unit used to hold medium data (in bytes).
Note: For media whose state is Inaccessible, the value of this property is the last known
size. For NotCreated media, the returned value is zero.
5.81.1.10 format (read-only)
wstring IMedium::format
Storage format of this medium.
The value of this attribute is a string that specifies a backend used to store medium data. The
storage format is defined when you create a new medium or automatically detected when you
open an existing medium, and cannot be changed later.
The list of all storage formats supported by this VirtualBox installation can be obtained using
ISystemProperties::mediumFormats[].
5.81.1.11 mediumFormat (read-only)
IMediumFormat IMedium::mediumFormat
Storage medium format object corresponding to this medium.
The value of this attribute is a reference to the medium format object that specifies the backend
properties used to store medium data. The storage format is defined when you create a new
medium or automatically detected when you open an existing medium, and cannot be changed
later.
Note: null is returned if there is no associated medium format object. This can e.g.
happen for medium objects representing host drives and other special medium objects.
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5.81.1.12 type (read/write)
MediumType IMedium::type
Type (role) of this medium.
The following constraints apply when changing the value of this attribute:
• If a medium is attached to a virtual machine (either in the current state or in one of the
snapshots), its type cannot be changed.
• As long as the medium has children, its type cannot be set to Writethrough.
• The type of all differencing media is Normal and cannot be changed.
The type of a newly created or opened medium is set to Normal, except for DVD and floppy
media, which have a type of Writethrough.
5.81.1.13 allowedTypes (read-only)
MediumType IMedium::allowedTypes[]
Returns which medium types can selected for this medium.
5.81.1.14 parent (read-only)
IMedium IMedium::parent
Parent of this medium (the medium this medium is directly based on).
Only differencing media have parents. For base (non-differencing) media, null is returned.
5.81.1.15 children (read-only)
IMedium IMedium::children[]
Children of this medium (all differencing media directly based on this medium). A null array
is returned if this medium does not have any children.
5.81.1.16 base (read-only)
IMedium IMedium::base
Base medium of this medium.
If this is a differencing medium, its base medium is the medium the given medium branch
starts from. For all other types of media, this property returns the medium object itself (i.e. the
same object this property is read on).
5.81.1.17 readOnly (read-only)
boolean IMedium::readOnly
Returns true if this medium is read-only and false otherwise.
A medium is considered to be read-only when its contents cannot be modified without breaking
the integrity of other parties that depend on this medium such as its child media or snapshots of
virtual machines where this medium is attached to these machines. If there are no children and
no such snapshots then there is no dependency and the medium is not read-only.
The value of this attribute can be used to determine the kind of the attachment that will
take place when attaching this medium to a virtual machine. If the value is false then the
medium will be attached directly. If the value is true then the medium will be attached indirectly
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by creating a new differencing child medium for that. See the interface description for more
information.
Note that all Immutable media are always read-only while all Writethrough media are always
not.
Note: The read-only condition represented by this attribute is related to the medium
type and usage, not to the current medium state and not to the read-only state of the
storage unit.
5.81.1.18 logicalSize (read-only)
long long IMedium::logicalSize
Logical size of this medium (in bytes), as reported to the guest OS running inside the virtual
machine this medium is attached to. The logical size is defined when the medium is created and
cannot be changed later.
Note: For media whose state is state is Inaccessible, the value of this property is the
last known logical size. For NotCreated media, the returned value is zero.
5.81.1.19 autoReset (read/write)
boolean IMedium::autoReset
Whether this differencing medium will be automatically reset each time a virtual machine it
is attached to is powered up. This attribute is automatically set to true for the last differencing
image of an “immutable” medium (see MediumType).
See reset() for more information about resetting differencing media.
Note: Reading this property on a base (non-differencing) medium will always false.
Changing the value of this property in this case is not supported.
5.81.1.20 lastAccessError (read-only)
wstring IMedium::lastAccessError
Text message that represents the result of the last accessibility check performed by
refreshState().
An empty string is returned if the last accessibility check was successful or has not yet been
called. As a result, if state is “Inaccessible” and this attribute is empty, then refreshState() has
yet to be called; this is the default value of media after VirtualBox initialization. A non-empty
string indicates a failure and should normally describe a reason of the failure (for example, a file
read error).
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5.81.1.21 machineIds (read-only)
uuid IMedium::machineIds[]
Array of UUIDs of all machines this medium is attached to.
A null array is returned if this medium is not attached to any machine or to any machine’s
snapshot.
Note: The returned array will include a machine even if this medium is not attached to
that machine in the current state but attached to it in one of the machine’s snapshots.
See getSnapshotIds() for details.
5.81.2 cloneTo
IProgress IMedium::cloneTo(
[in] IMedium target,
[in] MediumVariant variant[],
[in] IMedium parent)
target Target medium.
variant Exact image variant which should be created (as a combination of MediumVariant flags).
parent Parent of the cloned medium.
Starts creating a clone of this medium in the format and at the location defined by the target
argument.
The target medium must be either in NotCreated state (i.e. must not have an existing storage
unit) or in Created state (i.e. created and not locked, and big enough to hold the data or else the
copy will be partial). Upon successful completion, the cloned medium will contain exactly the
same sector data as the medium being cloned, except that in the first case a new UUID for the
clone will be randomly generated, and in the second case the UUID will remain unchanged.
The parent argument defines which medium will be the parent of the clone. Passing a null
reference indicates that the clone will be a base image, i.e. completely independent. It is possible
to specify an arbitrary medium for this parameter, including the parent of the medium which is
being cloned. Even cloning to a child of the source medium is possible. Note that when cloning
to an existing image, the parent argument is ignored.
After the returned progress object reports that the operation is successfully complete, the target medium gets remembered by this VirtualBox installation and may be attached to virtual
machines.
Note: This medium will be placed to LockedRead state for the duration of this operation.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The specified cloning variant is not supported at the moment.
5.81.3 cloneToBase
IProgress IMedium::cloneToBase(
[in] IMedium target,
[in] MediumVariant variant[])
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target Target medium.
variant MediumVariant flags).
Starts creating a clone of this medium in the format and at the location defined by the target
argument.
The target medium must be either in NotCreated state (i.e. must not have an existing storage
unit) or in Created state (i.e. created and not locked, and big enough to hold the data or else the
copy will be partial). Upon successful completion, the cloned medium will contain exactly the
same sector data as the medium being cloned, except that in the first case a new UUID for the
clone will be randomly generated, and in the second case the UUID will remain unchanged.
The parent argument defines which medium will be the parent of the clone. In this case the
clone will be a base image, i.e. completely independent. It is possible to specify an arbitrary
medium for this parameter, including the parent of the medium which is being cloned. Even
cloning to a child of the source medium is possible. Note that when cloning to an existing image,
the parent argument is ignored.
After the returned progress object reports that the operation is successfully complete, the target medium gets remembered by this VirtualBox installation and may be attached to virtual
machines.
Note: This medium will be placed to LockedRead state for the duration of this operation.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The specified cloning variant is not supported at the moment.
5.81.4 close
void IMedium::close()
Closes this medium.
The medium must not be attached to any known virtual machine and must not have any
known child media, otherwise the operation will fail.
When the medium is successfully closed, it is removed from the list of registered media, but its
storage unit is not deleted. In particular, this means that this medium can later be opened again
using the IVirtualBox::openMedium() call.
Note that after this method successfully returns, the given medium object becomes uninitialized. This means that any attempt to call any of its methods or attributes will fail with the
"Object not ready" (E_ACCESSDENIED) error.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_OBJECT_STATE: Invalid medium state (other than not created, created
or inaccessible).
• VBOX_E_OBJECT_IN_USE: Medium attached to virtual machine.
• VBOX_E_FILE_ERROR: Settings file not accessible.
• VBOX_E_XML_ERROR: Could not parse the settings file.
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5.81.5 compact
IProgress IMedium::compact()
Starts compacting of this medium. This means that the medium is transformed into a possibly
more compact storage representation. This potentially creates temporary images, which can
require a substantial amount of additional disk space.
This medium will be placed to LockedWrite state and all its parent media (if any) will be
placed to LockedRead state for the duration of this operation.
Please note that the results can be either returned straight away, or later as the result of the
background operation via the object returned via the progress parameter.
If this method fails, the following error codes may be reported:
• VBOX_E_NOT_SUPPORTED: Medium format does not support compacting (but potentially
needs it).
5.81.6 createBaseStorage
IProgress IMedium::createBaseStorage(
[in] long long logicalSize,
[in] MediumVariant variant[])
logicalSize Maximum logical size of the medium in bytes.
variant Exact image variant which should be created (as a combination of MediumVariant flags).
Starts creating a hard disk storage unit (fixed/dynamic, according to the variant flags) in in
the background. The previous storage unit created for this object, if any, must first be deleted
using deleteStorage(), otherwise the operation will fail.
Before the operation starts, the medium is placed in Creating state. If the create operation
fails, the medium will be placed back in NotCreated state.
After the returned progress object reports that the operation has successfully completed, the
medium state will be set to Created, the medium will be remembered by this VirtualBox installation and may be attached to virtual machines.
If this method fails, the following error codes may be reported:
• VBOX_E_NOT_SUPPORTED: The variant of storage creation operation is not supported. See
IMediumFormat::capabilities[].
5.81.7 createDiffStorage
IProgress IMedium::createDiffStorage(
[in] IMedium target,
[in] MediumVariant variant[])
target Target medium.
variant Exact image variant which should be created (as a combination of MediumVariant flags).
Starts creating an empty differencing storage unit based on this medium in the format and at
the location defined by the target argument.
The target medium must be in NotCreated state (i.e. must not have an existing storage unit).
Upon successful completion, this operation will set the type of the target medium to Normal and
create a storage unit necessary to represent the differencing medium data in the given format
(according to the storage format of the target object).
After the returned progress object reports that the operation is successfully complete, the target medium gets remembered by this VirtualBox installation and may be attached to virtual
machines.
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Note: The medium will be set to LockedRead state for the duration of this operation.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_IN_USE: Medium not in NotCreated state.
5.81.8 deleteStorage
IProgress IMedium::deleteStorage()
Starts deleting the storage unit of this medium.
The medium must not be attached to any known virtual machine and must not have any
known child media, otherwise the operation will fail. It will also fail if there is no storage unit to
delete or if deletion is already in progress, or if the medium is being in use (locked for read or
for write) or inaccessible. Therefore, the only valid state for this operation to succeed is Created.
Before the operation starts, the medium is placed in Deleting state and gets removed from the
list of remembered hard disks (media registry). If the delete operation fails, the medium will be
remembered again and placed back to Created state.
After the returned progress object reports that the operation is complete, the medium state
will be set to NotCreated and you will be able to use one of the storage creation methods to
create it again.
See also: close()
Note: If the deletion operation fails, it is not guaranteed that the storage unit still
exists. You may check the state value to answer this question.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_IN_USE: Medium is attached to a virtual machine.
• VBOX_E_NOT_SUPPORTED: Storage deletion is not allowed because neither of storage creation operations are supported. See IMediumFormat::capabilities[].
5.81.9 getProperties
wstring[] IMedium::getProperties(
[in] wstring names,
[out] wstring returnNames[])
names Names of properties to get.
returnNames Names of returned properties.
Returns values for a group of properties in one call.
The names of the properties to get are specified using the names argument which is a list of
comma-separated property names or an empty string if all properties are to be returned.
Note: Currently the value of this argument is ignored and the method always returns
all existing properties.
The list of all properties supported by the given medium format can be obtained with
IMediumFormat::describeProperties().
The method returns two arrays, the array of property names corresponding to the names argument and the current values of these properties. Both arrays have the same number of elements
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with each element at the given index in the first array corresponds to an element at the same
index in the second array.
For properties that do not have assigned values, an empty string is returned at the appropriate
index in the returnValues array.
5.81.10 getProperty
wstring IMedium::getProperty(
[in] wstring name)
name Name of the property to get.
Returns the value of the custom medium property with the given name.
The list of all properties supported by the given medium format can be obtained with
IMediumFormat::describeProperties().
Note: If this method returns an empty string in value, the requested property is supported but currently not assigned any value.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: Requested property does not exist (not supported by the
format).
• E_INVALIDARG: name is null or empty.
5.81.11 getSnapshotIds
uuid[] IMedium::getSnapshotIds(
[in] uuid machineId)
machineId UUID of the machine to query.
Returns an array of UUIDs of all snapshots of the given machine where this medium is attached
to.
If the medium is attached to the machine in the current state, then the first element in the array
will always be the ID of the queried machine (i.e. the value equal to the machineId argument),
followed by snapshot IDs (if any).
If the medium is not attached to the machine in the current state, then the array will contain
only snapshot IDs.
The returned array may be null if this medium is not attached to the given machine at all,
neither in the current state nor in one of the snapshots.
5.81.12 lockRead
IToken IMedium::lockRead()
Locks this medium for reading.
A read lock is shared: many clients can simultaneously lock the same medium for reading
unless it is already locked for writing (see lockWrite()) in which case an error is returned.
When the medium is locked for reading, it cannot be modified from within VirtualBox. This
means that any method that changes the properties of this medium or contents of the storage
unit will return an error (unless explicitly stated otherwise). That includes an attempt to start a
virtual machine that wants to write to the the medium.
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When the virtual machine is started up, it locks for reading all media it uses in read-only
mode. If some medium cannot be locked for reading, the startup procedure will fail. A medium
is typically locked for reading while it is used by a running virtual machine but has a depending
differencing image that receives the actual write operations. This way one base medium can have
multiple child differencing images which can be written to simultaneously. Read-only media such
as DVD and floppy images are also locked for reading only (so they can be in use by multiple
machines simultaneously).
A medium is also locked for reading when it is the source of a write operation such as cloneTo()
or mergeTo().
The medium locked for reading must be unlocked by abandoning the returned token object,
see IToken. Calls to lockRead() can be nested and the lock is actually released when all callers
have abandoned the token.
This method sets the medium state (see state) to “LockedRead” on success. The medium’s
previous state must be one of “Created”, “Inaccessible” or “LockedRead”.
Locking an inaccessible medium is not an error; this method performs a logical lock that
prevents modifications of this medium through the VirtualBox API, not a physical file-system
lock of the underlying storage unit.
This method returns the current state of the medium before the operation.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_OBJECT_STATE: Invalid medium state (e.g. not created, locked, inaccessible, creating, deleting).
5.81.13 lockWrite
IToken IMedium::lockWrite()
Locks this medium for writing.
A write lock, as opposed to lockRead(), is exclusive: there may be only one client holding a
write lock, and there may be no read locks while the write lock is held. As a result, read-locking
fails if a write lock is held, and write-locking fails if either a read or another write lock is held.
When a medium is locked for writing, it cannot be modified from within VirtualBox, and it
is not guaranteed that the values of its properties are up-to-date. Any method that changes the
properties of this medium or contents of the storage unit will return an error (unless explicitly
stated otherwise).
When a virtual machine is started up, it locks for writing all media it uses to write data to. If
any medium could not be locked for writing, the startup procedure will fail. If a medium has
differencing images, then while the machine is running, only the last (“leaf”) differencing image
is locked for writing, whereas its parents are locked for reading only.
A medium is also locked for writing when it is the target of a write operation such as cloneTo()
or mergeTo().
The medium locked for writing must be unlocked by abandoning the returned token object,
see IToken. Write locks cannot be nested.
This method sets the medium state (see state) to “LockedWrite” on success. The medium’s
previous state must be either “Created” or “Inaccessible”.
Locking an inaccessible medium is not an error; this method performs a logical lock that
prevents modifications of this medium through the VirtualBox API, not a physical file-system
lock of the underlying storage unit.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_OBJECT_STATE: Invalid medium state (e.g. not created, locked, inaccessible, creating, deleting).
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5.81.14 mergeTo
IProgress IMedium::mergeTo(
[in] IMedium target)
target Target medium.
Starts merging the contents of this medium and all intermediate differencing media in the
chain to the given target medium.
The target medium must be either a descendant of this medium or its ancestor (otherwise this
method will immediately return a failure). It follows that there are two logical directions of the
merge operation: from ancestor to descendant (forward merge) and from descendant to ancestor
(backward merge). Let us consider the following medium chain:
Base <- Diff_1 <- Diff_2
Here, calling this method on the Base medium object with Diff_2 as an argument will be a
forward merge; calling it on Diff_2 with Base as an argument will be a backward merge. Note
that in both cases the contents of the resulting medium will be the same, the only difference is
the medium object that takes the result of the merge operation. In case of the forward merge
in the above example, the result will be written to Diff_2; in case of the backward merge, the
result will be written to Base. In other words, the result of the operation is always stored in the
target medium.
Upon successful operation completion, the storage units of all media in the chain between this
(source) medium and the target medium, including the source medium itself, will be automatically deleted and the relevant medium objects (including this medium) will become uninitialized.
This means that any attempt to call any of their methods or attributes will fail with the "Object
not ready" (E_ACCESSDENIED) error. Applied to the above example, the forward merge of
Base to Diff_2 will delete and uninitialize both Base and Diff_1 media. Note that Diff_2 in
this case will become a base medium itself since it will no longer be based on any other medium.
Considering the above, all of the following conditions must be met in order for the merge
operation to succeed:
• Neither this (source) medium nor any intermediate differencing medium in the chain between it and the target medium is attached to any virtual machine.
• Neither the source medium nor the target medium is an Immutable medium.
• The part of the medium tree from the source medium to the target medium is a linear
chain, i.e. all medium in this chain have exactly one child which is the next medium in
this chain. The only exception from this rule is the target medium in the forward merge
operation; it is allowed to have any number of child media because the merge operation
will not change its logical contents (as it is seen by the guest OS or by children).
• None of the involved media are in LockedRead or LockedWrite state.
Note: This (source) medium and all intermediates will be placed to Deleting state and
the target medium will be placed to LockedWrite state and for the duration of this
operation.
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5.81.15 refreshState
MediumState IMedium::refreshState()
If the current medium state (see MediumState) is one of “Created”, “Inaccessible” or “LockedRead”, then this performs an accessibility check on the medium and sets the value of the state
attribute accordingly; that value is also returned for convenience.
For all other state values, this does not perform a refresh but returns the state only.
The refresh, if performed, may take a long time (several seconds or even minutes, depending
on the storage unit location and format) because it performs an accessibility check of the storage
unit. This check may cause a significant delay if the storage unit of the given medium is, for
example, a file located on a network share which is not currently accessible due to connectivity
problems. In that case, the call will not return until a timeout interval defined by the host OS
for this operation expires. For this reason, it is recommended to never read this attribute on the
main UI thread to avoid making the UI unresponsive.
If the last known state of the medium is “Created” and the accessibility check fails, then the
state would be set to “Inaccessible”, and lastAccessError may be used to get more details about
the failure. If the state of the medium is “LockedRead”, then it remains the same, and a nonempty value of lastAccessError will indicate a failed accessibility check in this case.
Note that not all medium states are applicable to all medium types.
5.81.16 reset
IProgress IMedium::reset()
Starts erasing the contents of this differencing medium.
This operation will reset the differencing medium to its initial state when it does not contain
any sector data and any read operation is redirected to its parent medium. This automatically
gets called during VM power-up for every medium whose autoReset attribute is true.
The medium will be write-locked for the duration of this operation (see lockWrite()).
If this method fails, the following error codes may be reported:
• VBOX_E_NOT_SUPPORTED: This is not a differencing medium.
• VBOX_E_INVALID_OBJECT_STATE: Medium is not in Created or Inaccessible state.
5.81.17 resize
IProgress IMedium::resize(
[in] long long logicalSize)
logicalSize New nominal capacity of the medium in bytes.
Starts resizing this medium. This means that the nominal size of the medium is set to the new
value. Both increasing and decreasing the size is possible, and there are no safety checks, since
VirtualBox does not make any assumptions about the medium contents.
Resizing usually needs additional disk space, and possibly also some temporary disk space.
Note that resize does not create a full temporary copy of the medium, so the additional disk
space requirement is usually much lower than using the clone operation.
This medium will be placed to LockedWrite state for the duration of this operation.
Please note that the results can be either returned straight away, or later as the result of the
background operation via the object returned via the progress parameter.
If this method fails, the following error codes may be reported:
• VBOX_E_NOT_SUPPORTED: Medium format does not support resizing.
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5.81.18 setIds
void IMedium::setIds(
[in] boolean setImageId,
[in] uuid imageId,
[in] boolean setParentId,
[in] uuid parentId)
setImageId Select whether a new image UUID is set or not.
imageId New UUID for the image. If an empty string is passed, then a new UUID is automatically
created, provided that setImageId is true. Specifying a zero UUID is not allowed.
setParentId Select whether a new parent UUID is set or not.
parentId New parent UUID for the image. If an empty string is passed, then a new UUID is
automatically created, provided setParentId is true. A zero UUID is valid.
Changes the UUID and parent UUID for a hard disk medium.
5.81.19 setLocation
IProgress IMedium::setLocation(
[in] wstring location)
location New location.
Changes the location of this medium. Some medium types may support changing the storage
unit location by simply changing the value of the associated property. In this case the operation
is performed immediately, and progress is returning a null reference. Otherwise on success
there is a progress object returned, which signals progress and completion of the operation. This
distinction is necessary because for some formats the operation is very fast, while for others it
can be very slow (moving the image file by copying all data), and in the former case it’d be a
waste of resources to create a progress object which will immediately signal completion.
When setting a location for a medium which corresponds to a/several regular file(s) in the
host’s file system, the given file name may be either relative to the VirtualBox home folder or
absolute. Note that if the given location specification does not contain the file extension part then
a proper default extension will be automatically appended by the implementation depending on
the medium type.
If this method fails, the following error codes may be reported:
• E_NOTIMPL: The operation is not implemented yet.
• VBOX_E_NOT_SUPPORTED: Medium format does not support changing the location.
5.81.20 setProperties
void IMedium::setProperties(
[in] wstring names[],
[in] wstring values[])
names Names of properties to set.
values Values of properties to set.
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Sets values for a group of properties in one call.
The names of the properties to set are passed in the names array along with the new values
for them in the values array. Both arrays have the same number of elements with each element
at the given index in the first array corresponding to an element at the same index in the second
array.
If there is at least one property name in names that is not valid, the method will fail before
changing the values of any other properties from the names array.
Using this method over setProperty() is preferred if you need to set several properties at once
since it is more efficient.
The list of all properties supported by the given medium format can be obtained with
IMediumFormat::describeProperties().
Setting the property value to null or an empty string is equivalent to deleting the existing
value. A default value (if it is defined for this property) will be used by the format backend in
this case.
5.81.21 setProperty
void IMedium::setProperty(
[in] wstring name,
[in] wstring value)
name Name of the property to set.
value Property value to set.
Sets the value of the custom medium property with the given name.
The list of all properties supported by the given medium format can be obtained with
IMediumFormat::describeProperties().
Note: Setting the property value to null or an empty string is equivalent to deleting
the existing value. A default value (if it is defined for this property) will be used by the
format backend in this case.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: Requested property does not exist (not supported by the
format).
• E_INVALIDARG: name is null or empty.
5.82 IMediumAttachment
Note: With the web service, this interface is mapped to a structure. Attributes that
return this interface will not return an object, but a complete structure containing the
attributes listed below as structure members.
The IMediumAttachment interface links storage media to virtual machines. For each medium
(IMedium) which has been attached to a storage controller (IStorageController) of a machine
(IMachine) via the IMachine::attachDevice() method, one instance of IMediumAttachment is
added to the machine’s IMachine::mediumAttachments[] array attribute.
Each medium attachment specifies the storage controller as well as a port and device number
and the IMedium instance representing a virtual hard disk or floppy or DVD image.
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For removable media (DVDs or floppies), there are two additional options. For one, the
IMedium instance can be null to represent an empty drive with no media inserted (see
IMachine::mountMedium()); secondly, the medium can be one of the pseudo-media for host
drives listed in IHost::DVDDrives[] or IHost::floppyDrives[].
Attaching Hard Disks
Hard disks are attached to virtual machines using the IMachine::attachDevice() method and
detached using the IMachine::detachDevice() method. Depending on a medium’s type (see
IMedium::type), hard disks are attached either directly or indirectly.
When a hard disk is being attached directly, it is associated with the virtual machine and
used for hard disk operations when the machine is running. When a hard disk is being attached
indirectly, a new differencing hard disk linked to it is implicitly created and this differencing hard
disk is associated with the machine and used for hard disk operations. This also means that if
IMachine::attachDevice() performs a direct attachment then the same hard disk will be returned
in response to the subsequent IMachine::getMedium() call; however if an indirect attachment is
performed then IMachine::getMedium() will return the implicitly created differencing hard disk,
not the original one passed to IMachine::attachDevice(). In detail:
• Normal base hard disks that do not have children (i.e. differencing hard disks linked
to them) and that are not already attached to virtual machines in snapshots are attached
directly. Otherwise, they are attached indirectly because having dependent children or
being part of the snapshot makes it impossible to modify hard disk contents without breaking the integrity of the dependent party. The IMedium::readOnly attribute allows to quickly
determine the kind of the attachment for the given hard disk. Note that if a normal base
hard disk is to be indirectly attached to a virtual machine with snapshots then a special
procedure called smart attachment is performed (see below).
• Normal differencing hard disks are like normal base hard disks: they are attached directly
if they do not have children and are not attached to virtual machines in snapshots, and
indirectly otherwise. Note that the smart attachment procedure is never performed for
differencing hard disks.
• Immutable hard disks are always attached indirectly because they are designed to be nonwritable. If an immutable hard disk is attached to a virtual machine with snapshots then a
special procedure called smart attachment is performed (see below).
• Writethrough hard disks are always attached directly, also as designed. This also means
that writethrough hard disks cannot have other hard disks linked to them at all.
• Shareable hard disks are always attached directly, also as designed. This also means that
shareable hard disks cannot have other hard disks linked to them at all. They behave
almost like writethrough hard disks, except that shareable hard disks can be attached to
several virtual machines which are running, allowing concurrent accesses. You need special
cluster software running in the virtual machines to make use of such disks.
Note that the same hard disk, regardless of its type, may be attached to more than one virtual
machine at a time. In this case, the machine that is started first gains exclusive access to the hard
disk and attempts to start other machines having this hard disk attached will fail until the first
machine is powered down.
Detaching hard disks is performed in a deferred fashion. This means that the given hard disk
remains associated with the given machine after a successful IMachine::detachDevice() call until
IMachine::saveSettings() is called to save all changes to machine settings to disk. This deferring
is necessary to guarantee that the hard disk configuration may be restored at any time by a call
to IMachine::discardSettings() before the settings are saved (committed).
Note that if IMachine::discardSettings() is called after indirectly attaching some hard disks
to the machine but before a call to IMachine::saveSettings() is made, it will implicitly delete
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all differencing hard disks implicitly created by IMachine::attachDevice() for these indirect attachments. Such implicitly created hard disks will also be immediately deleted when detached
explicitly using the IMachine::detachDevice() call if it is made before IMachine::saveSettings().
This implicit deletion is safe because newly created differencing hard disks do not contain any
user data.
However, keep in mind that detaching differencing hard disks that were implicitly created by
IMachine::attachDevice() before the last IMachine::saveSettings() call will not implicitly delete
them as they may already contain some data (for example, as a result of virtual machine execution). If these hard disks are no more necessary, the caller can always delete them explicitly
using IMedium::deleteStorage() after they are actually de-associated from this machine by the
IMachine::saveSettings() call.
Smart Attachment
When normal base or immutable hard disks are indirectly attached to a virtual machine then
some additional steps are performed to make sure the virtual machine will have the most recent
“view” of the hard disk being attached. These steps include walking through the machine’s
snapshots starting from the current one and going through ancestors up to the first snapshot.
Hard disks attached to the virtual machine in all of the encountered snapshots are checked
whether they are descendants of the given normal base or immutable hard disk. The first found
child (which is the differencing hard disk) will be used instead of the normal base or immutable
hard disk as a parent for creating a new differencing hard disk that will be actually attached to
the machine. And only if no descendants are found or if the virtual machine does not have any
snapshots then the normal base or immutable hard disk will be used itself as a parent for this
differencing hard disk.
It is easier to explain what smart attachment does using the following example:
BEFORE attaching B.vdi:
AFTER attaching B.vdi:
Snapshot 1 (B.vdi)
Snapshot 2 (D1->B.vdi)
Snapshot 3 (D2->D1.vdi)
Snapshot 4 (none)
CurState
(none)
Snapshot 1 (B.vdi)
Snapshot 2 (D1->B.vdi)
Snapshot 3 (D2->D1.vdi)
Snapshot 4 (none)
CurState
(D3->D2.vdi)
NOT
...
CurState
(D3->B.vdi)
The first column is the virtual machine configuration before the base hard disk B.vdi is attached, the second column shows the machine after this hard disk is attached. Constructs like
D1->B.vdi and similar mean that the hard disk that is actually attached to the machine is a
differencing hard disk, D1.vdi, which is linked to (based on) another hard disk, B.vdi.
As we can see from the example, the hard disk B.vdi was detached from the machine before
taking Snapshot 4. Later, after Snapshot 4 was taken, the user decides to attach B.vdi again.
B.vdi has dependent child hard disks (D1.vdi, D2.vdi), therefore it cannot be attached directly
and needs an indirect attachment (i.e. implicit creation of a new differencing hard disk). Due
to the smart attachment procedure, the new differencing hard disk (D3.vdi) will be based on
D2.vdi, not on B.vdi itself, since D2.vdi is the most recent view of B.vdi existing for this
snapshot branch of the given virtual machine.
Note that if there is more than one descendant hard disk of the given base hard disk found in
a snapshot, and there is an exact device, channel and bus match, then this exact match will be
used. Otherwise, the youngest descendant will be picked up.
There is one more important aspect of the smart attachment procedure which is not related
to snapshots at all. Before walking through the snapshots as described above, the backup
copy of the current list of hard disk attachment is searched for descendants. This backup
copy is created when the hard disk configuration is changed for the first time after the last
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IMachine::saveSettings() call and used by IMachine::discardSettings() to undo the recent hard
disk changes. When such a descendant is found in this backup copy, it will be simply re-attached
back, without creating a new differencing hard disk for it. This optimization is necessary to make
it possible to re-attach the base or immutable hard disk to a different bus, channel or device slot
without losing the contents of the differencing hard disk actually attached to the machine in
place of it.
5.82.1 Attributes
5.82.1.1 medium (read-only)
IMedium IMediumAttachment::medium
Medium object associated with this attachment; it can be null for removable devices.
5.82.1.2 controller (read-only)
wstring IMediumAttachment::controller
Name of the storage controller of this attachment; this refers to one of the controllers in
IMachine::storageControllers[] by name.
5.82.1.3 port (read-only)
long IMediumAttachment::port
Port number of this attachment. See IMachine::attachDevice() for the meaning of this value
for the different controller types.
5.82.1.4 device (read-only)
long IMediumAttachment::device
Device slot number of this attachment. See IMachine::attachDevice() for the meaning of this
value for the different controller types.
5.82.1.5 type (read-only)
DeviceType IMediumAttachment::type
Device type of this attachment.
5.82.1.6 passthrough (read-only)
boolean IMediumAttachment::passthrough
Pass I/O requests through to a device on the host.
5.82.1.7 temporaryEject (read-only)
boolean IMediumAttachment::temporaryEject
Whether guest-triggered eject results in unmounting the medium.
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5.82.1.8 isEjected (read-only)
boolean IMediumAttachment::isEjected
Signals that the removable medium has been ejected. This is not necessarily equivalent to
having a null medium association.
5.82.1.9 nonRotational (read-only)
boolean IMediumAttachment::nonRotational
Whether the associated medium is non-rotational.
5.82.1.10 discard (read-only)
boolean IMediumAttachment::discard
Whether the associated medium supports discarding unused blocks.
5.82.1.11 hotPluggable (read-only)
boolean IMediumAttachment::hotPluggable
Whether this attachment is hot pluggable or not.
5.82.1.12 bandwidthGroup (read-only)
IBandwidthGroup IMediumAttachment::bandwidthGroup
The bandwidth group this medium attachment is assigned to.
5.83 IMediumChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when a medium attachment changes.
5.83.1 Attributes
5.83.1.1 mediumAttachment (read-only)
IMediumAttachment IMediumChangedEvent::mediumAttachment
Medium attachment that is subject to change.
5.84 IMediumFormat
The IMediumFormat interface represents a medium format.
Each medium format has an associated backend which is used to handle media stored in this
format. This interface provides information about the properties of the associated backend.
Each medium format is identified by a string represented by the id attribute. This string is
used in calls like IVirtualBox::createHardDisk() to specify the desired format.
The list of all supported medium formats can be obtained using ISystemProperties::mediumFormats[].
See also: IMedium
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5.84.1 Attributes
5.84.1.1 id (read-only)
wstring IMediumFormat::id
Identifier of this format.
The format identifier is a non-null non-empty ASCII string. Note that this string is caseinsensitive. This means that, for example, all of the following strings:
"VDI"
"vdi"
"VdI"
refer to the same medium format.
This string is used in methods of other interfaces where it is necessary to specify a medium
format, such as IVirtualBox::createHardDisk().
5.84.1.2 name (read-only)
wstring IMediumFormat::name
Human readable description of this format.
Mainly for use in file open dialogs.
5.84.1.3 capabilities (read-only)
MediumFormatCapabilities IMediumFormat::capabilities[]
Capabilities of the format as an array of the flags.
For the meaning of individual capability flags see MediumFormatCapabilities.
5.84.2 describeFileExtensions
void IMediumFormat::describeFileExtensions(
[out] wstring extensions[],
[out] DeviceType types[])
extensions The array of supported extensions.
types The array which indicates the device type for every given extension.
Returns two arrays describing the supported file extensions.
The first array contains the supported extensions and the seconds one the type each extension
supports. Both have the same size.
Note that some backends do not work on files, so this array may be empty.
See also: capabilities[]
5.84.3 describeProperties
void IMediumFormat::describeProperties(
[out] wstring names[],
[out] wstring descriptions[],
[out] DataType types[],
[out] unsigned long flags[],
[out] wstring defaults[])
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5 Classes (interfaces)
names Array of property names.
descriptions Array of property descriptions.
types Array of property types.
flags Array of property flags.
defaults Array of default property values.
Returns several arrays describing the properties supported by this format.
An element with the given index in each array describes one property. Thus, the number
of elements in each returned array is the same and corresponds to the number of supported
properties.
The returned arrays are filled in only if the Properties flag is set. All arguments must be
non-null.
See also: DataType, DataFlags
5.85 IMediumRegisteredEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
The given medium was registered or unregistered within this VirtualBox installation.
5.85.1 Attributes
5.85.1.1 mediumId (read-only)
uuid IMediumRegisteredEvent::mediumId
ID of the medium this event relates to.
5.85.1.2 mediumType (read-only)
DeviceType IMediumRegisteredEvent::mediumType
Type of the medium this event relates to.
5.85.1.3 registered (read-only)
boolean IMediumRegisteredEvent::registered
If true, the medium was registered, otherwise it was unregistered.
5.86 IMouse
The IMouse interface represents the virtual machine’s mouse. Used in IConsole::mouse.
Through this interface, the virtual machine’s virtual mouse can be controlled.
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5 Classes (interfaces)
5.86.1 Attributes
5.86.1.1 absoluteSupported (read-only)
boolean IMouse::absoluteSupported
Whether the guest OS supports absolute mouse pointer positioning or not.
Note: You can use the IMouseCapabilityChangedEvent event to be instantly informed
about changes of this attribute during virtual machine execution.
See also: putMouseEventAbsolute()
5.86.1.2 relativeSupported (read-only)
boolean IMouse::relativeSupported
Whether the guest OS supports relative mouse pointer positioning or not.
Note: You can use the IMouseCapabilityChangedEvent event to be instantly informed
about changes of this attribute during virtual machine execution.
See also: putMouseEvent()
5.86.1.3 multiTouchSupported (read-only)
boolean IMouse::multiTouchSupported
Whether the guest OS has enabled the multi-touch reporting device.
Note: You can use the IMouseCapabilityChangedEvent event to be instantly informed
about changes of this attribute during virtual machine execution.
See also: putMouseEvent()
5.86.1.4 needsHostCursor (read-only)
boolean IMouse::needsHostCursor
Whether the guest OS can currently switch to drawing it’s own mouse cursor on demand.
Note: You can use the IMouseCapabilityChangedEvent event to be instantly informed
about changes of this attribute during virtual machine execution.
See also: putMouseEvent()
5.86.1.5 eventSource (read-only)
IEventSource IMouse::eventSource
Event source for mouse events.
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5 Classes (interfaces)
5.86.2 putEventMultiTouch
void IMouse::putEventMultiTouch(
[in] long count,
[in] long long contacts[],
[in] unsigned long scanTime)
count Number of contacts in the event.
contacts Each array element contains packed information about one contact. Bits 0..15: X
coordinate in pixels. Bits 16..31: Y coordinate in pixels. Bits 32..39: contact identifier. Bit
40: “in contact” flag, which indicates that there is a contact with the touch surface. Bit 41:
“in range” flag, the contact is close enough to the touch surface. All other bits are reserved
for future use and must be set to 0.
scanTime Timestamp of the event in milliseconds. Only relative time between events is important.
Sends a multi-touch pointer event. The coordinates are expressed in pixels and start from
[1,1] which corresponds to the top left corner of the virtual display.
Note: The guest may not understand or may choose to ignore this event.
See also: multiTouchSupported
If this method fails, the following error codes may be reported:
• E_ACCESSDENIED: Console not powered up.
• VBOX_E_IPRT_ERROR: Could not send event to virtual device.
5.86.3 putEventMultiTouchString
void IMouse::putEventMultiTouchString(
[in] long count,
[in] wstring contacts,
[in] unsigned long scanTime)
count See also: putEventMultiTouch()
contacts Contains information about all contacts: “id1,x1,y1,inContact1,inRange1;...;idN,xN,yN,inContactN,inRange
For example for two contacts: “0,10,20,1,1;1,30,40,1,1”
scanTime See also: putEventMultiTouch()
See also: putEventMultiTouch()
5.86.4 putMouseEvent
void IMouse::putMouseEvent(
[in] long dx,
[in] long dy,
[in] long dz,
[in] long dw,
[in] long buttonState)
dx Amount of pixels the mouse should move to the right. Negative values move the mouse to
the left.
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5 Classes (interfaces)
dy Amount of pixels the mouse should move downwards. Negative values move the mouse
upwards.
dz Amount of mouse wheel moves. Positive values describe clockwise wheel rotations, negative
values describe counterclockwise rotations.
dw Amount of horizontal mouse wheel moves. Positive values describe a movement to the left,
negative values describe a movement to the right.
buttonState The current state of mouse buttons. Every bit represents a mouse button as follows:
Bit 0 (0x01)left mouse buttonBit 1 (0x02)right mouse buttonBit 2 (0x04)middle mouse
button A value of 1 means the corresponding button is pressed. otherwise it is released.
Initiates a mouse event using relative pointer movements along x and y axis.
If this method fails, the following error codes may be reported:
• E_ACCESSDENIED: Console not powered up.
• VBOX_E_IPRT_ERROR: Could not send mouse event to virtual mouse.
5.86.5 putMouseEventAbsolute
void IMouse::putMouseEventAbsolute(
[in] long x,
[in] long y,
[in] long dz,
[in] long dw,
[in] long buttonState)
x X coordinate of the pointer in pixels, starting from 1.
y Y coordinate of the pointer in pixels, starting from 1.
dz Amount of mouse wheel moves. Positive values describe clockwise wheel rotations, negative
values describe counterclockwise rotations.
dw Amount of horizontal mouse wheel moves. Positive values describe a movement to the left,
negative values describe a movement to the right.
buttonState The current state of mouse buttons. Every bit represents a mouse button as follows:
Bit 0 (0x01)left mouse buttonBit 1 (0x02)right mouse buttonBit 2 (0x04)middle mouse
button A value of 1 means the corresponding button is pressed. otherwise it is released.
Positions the mouse pointer using absolute x and y coordinates. These coordinates are expressed in pixels and start from [1,1] which corresponds to the top left corner of the virtual
display.
Note: This method will have effect only if absolute mouse positioning is supported by
the guest OS.
See also: absoluteSupported
If this method fails, the following error codes may be reported:
• E_ACCESSDENIED: Console not powered up.
• VBOX_E_IPRT_ERROR: Could not send mouse event to virtual mouse.
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5.87 IMouseCapabilityChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when the mouse capabilities reported by the guest have changed. The new capabilities are passed.
5.87.1 Attributes
5.87.1.1 supportsAbsolute (read-only)
boolean IMouseCapabilityChangedEvent::supportsAbsolute
Supports absolute coordinates.
5.87.1.2 supportsRelative (read-only)
boolean IMouseCapabilityChangedEvent::supportsRelative
Supports relative coordinates.
5.87.1.3 supportsMultiTouch (read-only)
boolean IMouseCapabilityChangedEvent::supportsMultiTouch
Supports multi-touch events coordinates.
5.87.1.4 needsHostCursor (read-only)
boolean IMouseCapabilityChangedEvent::needsHostCursor
If host cursor is needed.
5.88 IMousePointerShapeChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when the guest mouse pointer shape has changed. The new shape data is given.
5.88.1 Attributes
5.88.1.1 visible (read-only)
boolean IMousePointerShapeChangedEvent::visible
Flag whether the pointer is visible.
5.88.1.2 alpha (read-only)
boolean IMousePointerShapeChangedEvent::alpha
Flag whether the pointer has an alpha channel.
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5 Classes (interfaces)
5.88.1.3 xhot (read-only)
unsigned long IMousePointerShapeChangedEvent::xhot
The pointer hot spot X coordinate.
5.88.1.4 yhot (read-only)
unsigned long IMousePointerShapeChangedEvent::yhot
The pointer hot spot Y coordinate.
5.88.1.5 width (read-only)
unsigned long IMousePointerShapeChangedEvent::width
Width of the pointer shape in pixels.
5.88.1.6 height (read-only)
unsigned long IMousePointerShapeChangedEvent::height
Height of the pointer shape in pixels.
5.88.1.7 shape (read-only)
octet IMousePointerShapeChangedEvent::shape[]
Shape buffer arrays.
The shape buffer contains a 1-bpp (bits per pixel) AND mask followed by a 32-bpp XOR (color)
mask.
For pointers without alpha channel the XOR mask pixels are 32-bit values: (lsb)BGR0(msb).
For pointers with alpha channel the XOR mask consists of (lsb)BGRA(msb) 32-bit values.
An AND mask is used for pointers with alpha channel, so if the callback does not support
alpha, the pointer could be displayed as a normal color pointer.
The AND mask is a 1-bpp bitmap with byte aligned scanlines. The size of the AND mask
therefore is cbAnd = (width + 7) / 8 * height. The padding bits at the end of each scanline
are undefined.
The XOR mask follows the AND mask on the next 4-byte aligned offset: uint8_t *pXor =
pAnd + (cbAnd + 3) & ~3. Bytes in the gap between the AND and the XOR mask are undefined. The XOR mask scanlines have no gap between them and the size of the XOR mask is: cXor
= width * 4 * height.
Note: If shape is 0, only the pointer visibility is changed.
5.89 INATEngine
Interface for managing a NAT engine which is used with a virtual machine. This allows
for changing NAT behavior such as port-forwarding rules. This interface is used in the
INetworkAdapter::NATEngine attribute.
239
5 Classes (interfaces)
5.89.1 Attributes
5.89.1.1 network (read/write)
wstring INATEngine::network
The network attribute of the NAT engine (the same value is used with built-in DHCP server to
fill corresponding fields of DHCP leases).
5.89.1.2 hostIP (read/write)
wstring INATEngine::hostIP
IP of host interface to bind all opened sockets to.
Note: Changing this does not change binding of port forwarding.
5.89.1.3 TFTPPrefix (read/write)
wstring INATEngine::TFTPPrefix
TFTP prefix attribute which is used with the built-in DHCP server to fill the corresponding
fields of DHCP leases.
5.89.1.4 TFTPBootFile (read/write)
wstring INATEngine::TFTPBootFile
TFTP boot file attribute which is used with the built-in DHCP server to fill the corresponding
fields of DHCP leases.
5.89.1.5 TFTPNextServer (read/write)
wstring INATEngine::TFTPNextServer
TFTP server attribute which is used with the built-in DHCP server to fill the corresponding
fields of DHCP leases.
Note: The preferred form is IPv4 addresses.
5.89.1.6 aliasMode (read/write)
unsigned long INATEngine::aliasMode
5.89.1.7 DNSPassDomain (read/write)
boolean INATEngine::DNSPassDomain
Whether the DHCP server should pass the DNS domain used by the host.
5.89.1.8 DNSProxy (read/write)
boolean INATEngine::DNSProxy
Whether the DHCP server (and the DNS traffic by NAT) should pass the address of the DNS
proxy and process traffic using DNS servers registered on the host.
240
5 Classes (interfaces)
5.89.1.9 DNSUseHostResolver (read/write)
boolean INATEngine::DNSUseHostResolver
Whether the DHCP server (and the DNS traffic by NAT) should pass the address of the DNS
proxy and process traffic using the host resolver mechanism.
5.89.1.10 redirects (read-only)
wstring INATEngine::redirects[]
Array of NAT port-forwarding rules in string representation, in the following format:
“name,protocol id,host ip,host port,guest ip,guest port”.
5.89.2 addRedirect
void INATEngine::addRedirect(
[in] wstring name,
[in] NATProtocol proto,
[in] wstring hostIP,
[in] unsigned short hostPort,
[in] wstring guestIP,
[in] unsigned short guestPort)
name The name of the rule. An empty name is acceptable, in which case the NAT engine autogenerates one using the other parameters.
proto Protocol handled with the rule.
hostIP IP of the host interface to which the rule should apply. An empty ip address is acceptable,
in which case the NAT engine binds the handling socket to any interface.
hostPort The port number to listen on.
guestIP The IP address of the guest which the NAT engine will forward matching packets to.
An empty IP address is acceptable, in which case the NAT engine will forward packets to
the first DHCP lease (x.x.x.15).
guestPort The port number to forward.
Adds a new NAT port-forwarding rule.
5.89.3 getNetworkSettings
void INATEngine::getNetworkSettings(
[out] unsigned long mtu,
[out] unsigned long sockSnd,
[out] unsigned long sockRcv,
[out] unsigned long TcpWndSnd,
[out] unsigned long TcpWndRcv)
mtu
sockSnd
sockRcv
TcpWndSnd
TcpWndRcv
Returns network configuration of NAT engine. See setNetworkSettings() for parameter descriptions.
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5 Classes (interfaces)
5.89.4 removeRedirect
void INATEngine::removeRedirect(
[in] wstring name)
name The name of the rule to delete.
Removes a port-forwarding rule that was previously registered.
5.89.5 setNetworkSettings
void INATEngine::setNetworkSettings(
[in] unsigned long mtu,
[in] unsigned long sockSnd,
[in] unsigned long sockRcv,
[in] unsigned long TcpWndSnd,
[in] unsigned long TcpWndRcv)
mtu MTU (maximum transmission unit) of the NAT engine in bytes.
sockSnd Capacity of the socket send buffer in bytes when creating a new socket.
sockRcv Capacity of the socket receive buffer in bytes when creating a new socket.
TcpWndSnd Initial size of the NAT engine’s sending TCP window in bytes when establishing a
new TCP connection.
TcpWndRcv Initial size of the NAT engine’s receiving TCP window in bytes when establishing
a new TCP connection.
Sets network configuration of the NAT engine.
5.90 INATNetwork
5.90.1 Attributes
5.90.1.1 networkName (read/write)
wstring INATNetwork::networkName
TBD: the idea, technically we can start any number of the NAT networks, but we should expect
that at some point we will get collisions because of port-forwanding rules. so perhaps we should
support only single instance of NAT network.
5.90.1.2 enabled (read/write)
boolean INATNetwork::enabled
5.90.1.3 network (read/write)
wstring INATNetwork::network
This is CIDR IPv4 string. Specifying it user defines IPv4 addresses of gateway (low address +
1) and DHCP server (= low address + 2). Note: If there are defined IPv4 port-forward rules
update of network will be ignored (because new assignment could break existing rules).
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5 Classes (interfaces)
5.90.1.4 gateway (read-only)
wstring INATNetwork::gateway
This attribute is read-only. It’s recalculated on changing network attribute (low address of
network + 1).
5.90.1.5 IPv6Enabled (read/write)
boolean INATNetwork::IPv6Enabled
This attribute define whether gateway will support IPv6 or not.
5.90.1.6 IPv6Prefix (read/write)
wstring INATNetwork::IPv6Prefix
This a CIDR IPv6 defining prefix for link-local addresses autoconfiguration within network.
Note: ignored if attribute IPv6Enabled is false.
5.90.1.7 advertiseDefaultIPv6RouteEnabled (read/write)
boolean INATNetwork::advertiseDefaultIPv6RouteEnabled
5.90.1.8 needDhcpServer (read/write)
boolean INATNetwork::needDhcpServer
5.90.1.9 eventSource (read-only)
IEventSource INATNetwork::eventSource
5.90.1.10 portForwardRules4 (read-only)
wstring INATNetwork::portForwardRules4[]
Array of NAT port-forwarding rules in string representation, in the following format:
“name:protocolid:[host ip]:host port:[guest ip]:guest port”.
5.90.1.11 localMappings (read-only)
wstring INATNetwork::localMappings[]
Array of mappings (address,offset),e.g. (“127.0.1.1=4”) maps 127.0.1.1 to networkid + 4.
5.90.1.12 loopbackIp6 (read/write)
long INATNetwork::loopbackIp6
Offset in ipv6 network from network id for address mapped into loopback6 interface of the
host.
5.90.1.13 portForwardRules6 (read-only)
wstring INATNetwork::portForwardRules6[]
Array of NAT port-forwarding rules in string representation, in the following format:
“name:protocolid:[host ip]:host port:[guest ip]:guest port”.
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5 Classes (interfaces)
5.90.2 addLocalMapping
void INATNetwork::addLocalMapping(
[in] wstring hostid,
[in] long offset)
hostid
offset
5.90.3 addPortForwardRule
void INATNetwork::addPortForwardRule(
[in] boolean isIpv6,
[in] wstring ruleName,
[in] NATProtocol proto,
[in] wstring hostIP,
[in] unsigned short hostPort,
[in] wstring guestIP,
[in] unsigned short guestPort)
isIpv6
ruleName
proto Protocol handled with the rule.
hostIP IP of the host interface to which the rule should apply. An empty ip address is acceptable,
in which case the NAT engine binds the handling socket to any interface.
hostPort The port number to listen on.
guestIP The IP address of the guest which the NAT engine will forward matching packets to.
An empty IP address is not acceptable.
guestPort The port number to forward.
5.90.4 removePortForwardRule
void INATNetwork::removePortForwardRule(
[in] boolean iSipv6,
[in] wstring ruleName)
iSipv6
ruleName
5.90.5 start
void INATNetwork::start(
[in] wstring trunkType)
trunkType Type of internal network trunk.
5.90.6 stop
void INATNetwork::stop()
244
5 Classes (interfaces)
5.91 INATNetworkAlterEvent (INATNetworkChangedEvent)
Note: This interface extends INATNetworkChangedEvent and therefore supports all its
methods and attributes as well.
5.92 INATNetworkChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
5.92.1 Attributes
5.92.1.1 networkName (read-only)
wstring INATNetworkChangedEvent::networkName
5.93 INATNetworkCreationDeletionEvent
(INATNetworkAlterEvent)
Note: This interface extends INATNetworkAlterEvent and therefore supports all its
methods and attributes as well.
5.93.1 Attributes
5.93.1.1 creationEvent (read-only)
boolean INATNetworkCreationDeletionEvent::creationEvent
5.94 INATNetworkPortForwardEvent
(INATNetworkAlterEvent)
Note: This interface extends INATNetworkAlterEvent and therefore supports all its
methods and attributes as well.
5.94.1 Attributes
5.94.1.1 create (read-only)
boolean INATNetworkPortForwardEvent::create
5.94.1.2 ipv6 (read-only)
boolean INATNetworkPortForwardEvent::ipv6
245
5 Classes (interfaces)
5.94.1.3 name (read-only)
wstring INATNetworkPortForwardEvent::name
5.94.1.4 proto (read-only)
NATProtocol INATNetworkPortForwardEvent::proto
5.94.1.5 hostIp (read-only)
wstring INATNetworkPortForwardEvent::hostIp
5.94.1.6 hostPort (read-only)
long INATNetworkPortForwardEvent::hostPort
5.94.1.7 guestIp (read-only)
wstring INATNetworkPortForwardEvent::guestIp
5.94.1.8 guestPort (read-only)
long INATNetworkPortForwardEvent::guestPort
5.95 INATNetworkSettingEvent (INATNetworkAlterEvent)
Note: This interface extends INATNetworkAlterEvent and therefore supports all its
methods and attributes as well.
5.95.1 Attributes
5.95.1.1 enabled (read-only)
boolean INATNetworkSettingEvent::enabled
5.95.1.2 network (read-only)
wstring INATNetworkSettingEvent::network
5.95.1.3 gateway (read-only)
wstring INATNetworkSettingEvent::gateway
5.95.1.4 advertiseDefaultIPv6RouteEnabled (read-only)
boolean INATNetworkSettingEvent::advertiseDefaultIPv6RouteEnabled
5.95.1.5 needDhcpServer (read-only)
boolean INATNetworkSettingEvent::needDhcpServer
246
5 Classes (interfaces)
5.96 INATNetworkStartStopEvent
(INATNetworkChangedEvent)
Note: This interface extends INATNetworkChangedEvent and therefore supports all its
methods and attributes as well.
5.96.1 Attributes
5.96.1.1 startEvent (read-only)
boolean INATNetworkStartStopEvent::startEvent
IsStartEvent is true when NAT network is started and false on stopping.
5.97 INATRedirectEvent (IMachineEvent)
Note: This interface extends IMachineEvent and therefore supports all its methods and
attributes as well.
Notification when NAT redirect rule added or removed.
5.97.1 Attributes
5.97.1.1 slot (read-only)
unsigned long INATRedirectEvent::slot
Adapter which NAT attached to.
5.97.1.2 remove (read-only)
boolean INATRedirectEvent::remove
Whether rule remove or add.
5.97.1.3 name (read-only)
wstring INATRedirectEvent::name
Name of the rule.
5.97.1.4 proto (read-only)
NATProtocol INATRedirectEvent::proto
Protocol (TCP or UDP) of the redirect rule.
5.97.1.5 hostIP (read-only)
wstring INATRedirectEvent::hostIP
Host ip address to bind socket on.
247
5 Classes (interfaces)
5.97.1.6 hostPort (read-only)
long INATRedirectEvent::hostPort
Host port to bind socket on.
5.97.1.7 guestIP (read-only)
wstring INATRedirectEvent::guestIP
Guest ip address to redirect to.
5.97.1.8 guestPort (read-only)
long INATRedirectEvent::guestPort
Guest port to redirect to.
5.98 INetworkAdapter
Represents a virtual network adapter that is attached to a virtual machine. Each virtual machine
has a fixed number of network adapter slots with one instance of this attached to each of them.
Call IMachine::getNetworkAdapter() to get the network adapter that is attached to a given slot
in a given machine.
Each network adapter can be in one of five attachment modes, which are represented by the
NetworkAttachmentType enumeration; see the attachmentType attribute.
5.98.1 Attributes
5.98.1.1 adapterType (read/write)
NetworkAdapterType INetworkAdapter::adapterType
Type of the virtual network adapter. Depending on this value, VirtualBox will provide a different virtual network hardware to the guest.
5.98.1.2 slot (read-only)
unsigned long INetworkAdapter::slot
Slot number this adapter is plugged into.
Corresponds to the value you pass to
IMachine::getNetworkAdapter() to obtain this instance.
5.98.1.3 enabled (read/write)
boolean INetworkAdapter::enabled
Flag whether the network adapter is present in the guest system. If disabled, the virtual
guest hardware will not contain this network adapter. Can only be changed when the VM is not
running.
5.98.1.4 MACAddress (read/write)
wstring INetworkAdapter::MACAddress
Ethernet MAC address of the adapter, 12 hexadecimal characters. When setting it to null or
an empty string, VirtualBox will generate a unique MAC address.
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5 Classes (interfaces)
5.98.1.5 attachmentType (read/write)
NetworkAttachmentType INetworkAdapter::attachmentType
Sets/Gets network attachment type of this network adapter.
5.98.1.6 bridgedInterface (read/write)
wstring INetworkAdapter::bridgedInterface
Name of the network interface the VM should be bridged to.
5.98.1.7 hostOnlyInterface (read/write)
wstring INetworkAdapter::hostOnlyInterface
Name of the host only network interface the VM is attached to.
5.98.1.8 internalNetwork (read/write)
wstring INetworkAdapter::internalNetwork
Name of the internal network the VM is attached to.
5.98.1.9 NATNetwork (read/write)
wstring INetworkAdapter::NATNetwork
Name of the NAT network the VM is attached to.
5.98.1.10 genericDriver (read/write)
wstring INetworkAdapter::genericDriver
Name of the driver to use for the “Generic” network attachment type.
5.98.1.11 cableConnected (read/write)
boolean INetworkAdapter::cableConnected
Flag whether the adapter reports the cable as connected or not. It can be used to report offline
situations to a VM.
5.98.1.12 lineSpeed (read/write)
unsigned long INetworkAdapter::lineSpeed
Line speed reported by custom drivers, in units of 1 kbps.
5.98.1.13 promiscModePolicy (read/write)
NetworkAdapterPromiscModePolicy INetworkAdapter::promiscModePolicy
The promiscuous mode policy of the network adapter when attached to an internal network,
host only network or a bridge.
249
5 Classes (interfaces)
5.98.1.14 traceEnabled (read/write)
boolean INetworkAdapter::traceEnabled
Flag whether network traffic from/to the network card should be traced. Can only be toggled
when the VM is turned off.
5.98.1.15 traceFile (read/write)
wstring INetworkAdapter::traceFile
Filename where a network trace will be stored. If not set, VBox-pid.pcap will be used.
5.98.1.16 NATEngine (read-only)
INATEngine INetworkAdapter::NATEngine
Points to the NAT engine which handles the network address translation for this interface. This
is active only when the interface actually uses NAT.
5.98.1.17 bootPriority (read/write)
unsigned long INetworkAdapter::bootPriority
Network boot priority of the adapter. Priority 1 is highest. If not set, the priority is considered
to be at the lowest possible setting.
5.98.1.18 bandwidthGroup (read/write)
IBandwidthGroup INetworkAdapter::bandwidthGroup
The bandwidth group this network adapter is assigned to.
5.98.2 getProperties
wstring[] INetworkAdapter::getProperties(
[in] wstring names,
[out] wstring returnNames[])
names Names of properties to get.
returnNames Names of returned properties.
Returns values for a group of properties in one call.
The names of the properties to get are specified using the names argument which is a list of
comma-separated property names or an empty string if all properties are to be returned.
Note: Currently the value of this argument is ignored and the method always returns
all existing properties.
The method returns two arrays, the array of property names corresponding to the names argument and the current values of these properties. Both arrays have the same number of elements
with each element at the given index in the first array corresponds to an element at the same
index in the second array.
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5 Classes (interfaces)
5.98.3 getProperty
wstring INetworkAdapter::getProperty(
[in] wstring key)
key Name of the property to get.
Returns the value of the network attachment property with the given name.
If the requested data key does not exist, this function will succeed and return an empty string
in the value argument.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: name is null or empty.
5.98.4 setProperty
void INetworkAdapter::setProperty(
[in] wstring key,
[in] wstring value)
key Name of the property to set.
value Property value to set.
Sets the value of the network attachment property with the given name.
Setting the property value to null or an empty string is equivalent to deleting the existing
value.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: name is null or empty.
5.99 INetworkAdapterChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when a property of one of the virtual network adapters changes. Interested callees
should use INetworkAdapter methods and attributes to find out what has changed.
5.99.1 Attributes
5.99.1.1 networkAdapter (read-only)
INetworkAdapter INetworkAdapterChangedEvent::networkAdapter
Network adapter that is subject to change.
5.100 IPCIAddress
Address on the PCI bus.
251
5 Classes (interfaces)
5.100.1 Attributes
5.100.1.1 bus (read/write)
short IPCIAddress::bus
Bus number.
5.100.1.2 device (read/write)
short IPCIAddress::device
Device number.
5.100.1.3 devFunction (read/write)
short IPCIAddress::devFunction
Device function number.
5.100.2 asLong
long IPCIAddress::asLong()
Convert PCI address into long.
5.100.3 fromLong
void IPCIAddress::fromLong(
[in] long number)
number
Make PCI address from long.
5.101 IPCIDeviceAttachment
Note: With the web service, this interface is mapped to a structure. Attributes that
return this interface will not return an object, but a complete structure containing the
attributes listed below as structure members.
Information about PCI attachments.
5.101.1 Attributes
5.101.1.1 name (read-only)
wstring IPCIDeviceAttachment::name
Device name.
5.101.1.2 isPhysicalDevice (read-only)
boolean IPCIDeviceAttachment::isPhysicalDevice
If this is physical or virtual device.
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5 Classes (interfaces)
5.101.1.3 hostAddress (read-only)
long IPCIDeviceAttachment::hostAddress
Address of device on the host, applicable only to host devices.
5.101.1.4 guestAddress (read-only)
long IPCIDeviceAttachment::guestAddress
Address of device on the guest.
5.102 IParallelPort
The IParallelPort interface represents the virtual parallel port device.
The virtual parallel port device acts like an ordinary parallel port inside the virtual machine.
This device communicates to the real parallel port hardware using the name of the parallel device
on the host computer specified in the #path attribute.
Each virtual parallel port device is assigned a base I/O address and an IRQ number that will be
reported to the guest operating system and used to operate the given parallel port from within
the virtual machine.
See also: IMachine::getParallelPort()
5.102.1 Attributes
5.102.1.1 slot (read-only)
unsigned long IParallelPort::slot
Slot number this parallel port is plugged into.
IMachine::getParallelPort() to obtain this instance.
Corresponds to the value you pass to
5.102.1.2 enabled (read/write)
boolean IParallelPort::enabled
Flag whether the parallel port is enabled. If disabled, the parallel port will not be reported to
the guest OS.
5.102.1.3 IOBase (read/write)
unsigned long IParallelPort::IOBase
Base I/O address of the parallel port.
5.102.1.4 IRQ (read/write)
unsigned long IParallelPort::IRQ
IRQ number of the parallel port.
5.102.1.5 path (read/write)
wstring IParallelPort::path
Host parallel device name. If this parallel port is enabled, setting a null or an empty string as
this attribute’s value will result in an error.
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5 Classes (interfaces)
5.103 IParallelPortChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when a property of one of the virtual parallel ports changes. Interested callees
should use ISerialPort methods and attributes to find out what has changed.
5.103.1 Attributes
5.103.1.1 parallelPort (read-only)
IParallelPort IParallelPortChangedEvent::parallelPort
Parallel port that is subject to change.
5.104 IPerformanceCollector
The IPerformanceCollector interface represents a service that collects and stores performance
metrics data.
Performance metrics are associated with objects of interfaces like IHost and IMachine. Each
object has a distinct set of performance metrics. The set can be obtained with getMetrics().
Metric data is collected at the specified intervals and is retained internally. The interval and
the number of retained samples can be set with setupMetrics(). Both metric data and collection
settings are not persistent, they are discarded as soon as VBoxSVC process terminates. Moreover,
metric settings and data associated with a particular VM only exist while VM is running. They
disappear as soon as VM shuts down. It is not possible to set up metrics for machines that are
powered off. One needs to start VM first, then set up metric collection parameters.
Metrics are organized hierarchically, with each level separated by a slash (/) character. Generally, the scheme for metric names is like this:
Category/Metric[/SubMetric][:aggregation]
“Category/Metric” together form the base metric name. A base metric is the smallest unit for
which a sampling interval and the number of retained samples can be set. Only base metrics
can be enabled and disabled. All sub-metrics are collected when their base metric is collected.
Collected values for any set of sub-metrics can be queried with queryMetricsData().
For example “CPU/Load/User:avg” metric name stands for the “CPU” category, “Load” metric,
“User” submetric, “average” aggregate. An aggregate function is computed over all retained data.
Valid aggregate functions are:
• avg – average
• min – minimum
• max – maximum
When setting up metric parameters, querying metric data, enabling or disabling metrics wildcards can be used in metric names to specify a subset of metrics. For example, to select all
CPU-related metrics use CPU/*, all averages can be queried using *:avg and so on. To query
metric values without aggregates *: can be used.
The valid names for base metrics are:
• CPU/Load
• CPU/MHz
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5 Classes (interfaces)
• RAM/Usage
• RAM/VMM
The general sequence for collecting and retrieving the metrics is:
• Obtain an instance of IPerformanceCollector with IVirtualBox::performanceCollector
• Allocate and populate an array with references to objects the metrics will be collected for.
Use references to IHost and IMachine objects.
• Allocate and populate an array with base metric names the data will be collected for.
• Call setupMetrics(). From now on the metric data will be collected and stored.
• Wait for the data to get collected.
• Allocate and populate an array with references to objects the metric values will be queried
for. You can re-use the object array used for setting base metrics.
• Allocate and populate an array with metric names the data will be collected for. Note that
metric names differ from base metric names.
• Call queryMetricsData(). The data that have been collected so far are returned. Note that
the values are still retained internally and data collection continues.
For an example of usage refer to the following files in VirtualBox SDK:
• Java: bindings/webservice/java/jax-ws/samples/metrictest.java
• Python: bindings/xpcom/python/sample/shellcommon.py
5.104.1 Attributes
5.104.1.1 metricNames (read-only)
wstring IPerformanceCollector::metricNames[]
Array of unique names of metrics.
This array represents all metrics supported by the performance collector. Individual objects do
not necessarily support all of them. getMetrics() can be used to get the list of supported metrics
for a particular object.
5.104.2 disableMetrics
IPerformanceMetric[] IPerformanceCollector::disableMetrics(
[in] wstring metricNames[],
[in] $unknown objects[])
metricNames Metric name filter. Comma-separated list of metrics with wildcard support.
objects Set of objects to disable metrics for.
Turns off collecting specified base metrics. Returns an array of IPerformanceMetric describing
the metrics have been affected.
Note: Null or empty metric name array means all metrics. Null or empty object array
means all existing objects. If metric name array contains a single element and object
array contains many, the single metric name array element is applied to each object
array element to form metric/object pairs.
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5 Classes (interfaces)
5.104.3 enableMetrics
IPerformanceMetric[] IPerformanceCollector::enableMetrics(
[in] wstring metricNames[],
[in] $unknown objects[])
metricNames Metric name filter. Comma-separated list of metrics with wildcard support.
objects Set of objects to enable metrics for.
Turns on collecting specified base metrics. Returns an array of IPerformanceMetric describing
the metrics have been affected.
Note: Null or empty metric name array means all metrics. Null or empty object array
means all existing objects. If metric name array contains a single element and object
array contains many, the single metric name array element is applied to each object
array element to form metric/object pairs.
5.104.4 getMetrics
IPerformanceMetric[] IPerformanceCollector::getMetrics(
[in] wstring metricNames[],
[in] $unknown objects[])
metricNames Metric name filter. Currently, only a comma-separated list of metrics is supported.
objects Set of objects to return metric parameters for.
Returns parameters of specified metrics for a set of objects.
Note: Null metrics array means all metrics. Null object array means all existing
objects.
5.104.5 queryMetricsData
long[] IPerformanceCollector::queryMetricsData(
[in] wstring metricNames[],
[in] $unknown objects[],
[out] wstring returnMetricNames[],
[out] $unknown returnObjects[],
[out] wstring returnUnits[],
[out] unsigned long returnScales[],
[out] unsigned long returnSequenceNumbers[],
[out] unsigned long returnDataIndices[],
[out] unsigned long returnDataLengths[])
metricNames Metric name filter. Comma-separated list of metrics with wildcard support.
objects Set of objects to query metrics for.
returnMetricNames Names of metrics returned in returnData.
returnObjects Objects associated with metrics returned in returnData.
returnUnits Units of measurement for each returned metric.
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5 Classes (interfaces)
returnScales Divisor that should be applied to return values in order to get floating
point values.
For example: (double)returnData[returnDataIndices[0]+i] /
returnScales[0] will retrieve the floating point value of i-th sample of the first metric.
returnSequenceNumbers Sequence numbers of the first elements of value sequences of particular metrics returned in returnData. For aggregate metrics it is the sequence number
of the sample the aggregate started calculation from.
returnDataIndices Indices of the first elements of value sequences of particular metrics returned in returnData.
returnDataLengths Lengths of value sequences of particular metrics.
Queries collected metrics data for a set of objects.
The data itself and related metric information are returned in seven parallel and one flattened array of arrays. Elements of returnMetricNames, returnObjects, returnUnits,
returnScales, returnSequenceNumbers, returnDataIndices and returnDataLengths
with the same index describe one set of values corresponding to a single metric.
The returnData parameter is a flattened array of arrays. Each start and length of a subarray is indicated by returnDataIndices and returnDataLengths. The first value for metric
metricNames[i] is at returnData[returnIndices[i]].
Note: Null or empty metric name array means all metrics. Null or empty object array
means all existing objects. If metric name array contains a single element and object
array contains many, the single metric name array element is applied to each object
array element to form metric/object pairs.
Note: Data collection continues behind the scenes after call to queryMetricsData.
The return data can be seen as the snapshot of the current state at the time of
queryMetricsData call. The internally kept metric values are not cleared by the
call. This allows querying different subsets of metrics or aggregates with subsequent
calls. If periodic querying is needed it is highly suggested to query the values with
interval*count period to avoid confusion. This way a completely new set of data
values will be provided by each query.
5.104.6 setupMetrics
IPerformanceMetric[] IPerformanceCollector::setupMetrics(
[in] wstring metricNames[],
[in] $unknown objects[],
[in] unsigned long period,
[in] unsigned long count)
metricNames Metric name filter. Comma-separated list of metrics with wildcard support.
objects Set of objects to setup metric parameters for.
period Time interval in seconds between two consecutive samples of performance data.
count Number of samples to retain in performance data history. Older samples get discarded.
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Sets parameters of specified base metrics for a set of objects.
IPerformanceMetric describing the metrics have been affected.
Returns an array of
Note: Null or empty metric name array means all metrics. Null or empty object array
means all existing objects. If metric name array contains a single element and object
array contains many, the single metric name array element is applied to each object
array element to form metric/object pairs.
5.105 IPerformanceMetric
The IPerformanceMetric interface represents parameters of the given performance metric.
5.105.1 Attributes
5.105.1.1 metricName (read-only)
wstring IPerformanceMetric::metricName
Name of the metric.
5.105.1.2 object (read-only)
$unknown IPerformanceMetric::object
Object this metric belongs to.
5.105.1.3 description (read-only)
wstring IPerformanceMetric::description
Textual description of the metric.
5.105.1.4 period (read-only)
unsigned long IPerformanceMetric::period
Time interval between samples, measured in seconds.
5.105.1.5 count (read-only)
unsigned long IPerformanceMetric::count
Number of recent samples retained by the performance collector for this metric.
When the collected sample count exceeds this number, older samples are discarded.
5.105.1.6 unit (read-only)
wstring IPerformanceMetric::unit
Unit of measurement.
5.105.1.7 minimumValue (read-only)
long IPerformanceMetric::minimumValue
Minimum possible value of this metric.
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5.105.1.8 maximumValue (read-only)
long IPerformanceMetric::maximumValue
Maximum possible value of this metric.
5.106 IProcess
Abstract parent interface for processes handled by VirtualBox.
5.106.1 Attributes
5.106.1.1 arguments (read-only)
wstring IProcess::arguments[]
The arguments this process is using for execution.
5.106.1.2 environment (read-only)
wstring IProcess::environment[]
The environment block this process is using during execution.
5.106.1.3 eventSource (read-only)
IEventSource IProcess::eventSource
Event source for VirtualBox events.
5.106.1.4 executablePath (read-only)
wstring IProcess::executablePath
Full path of the actual executable image.
5.106.1.5 exitCode (read-only)
long IProcess::exitCode
The exit code. Only available when the process has been terminated normally.
5.106.1.6 name (read-only)
wstring IProcess::name
The friendly name of this process.
5.106.1.7 PID (read-only)
unsigned long IProcess::PID
The process ID (PID).
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5.106.1.8 status (read-only)
ProcessStatus IProcess::status
The current process status; see ProcessStatus for more information.
5.106.2 read
octet[] IProcess::read(
[in] unsigned long handle,
[in] unsigned long toRead,
[in] unsigned long timeoutMS)
handle Handle to read from. Usually 0 is stdin.
toRead Number of bytes to read.
timeoutMS Timeout (in ms) to wait for the operation to complete. Pass 0 for an infinite timeout.
Reads data from a running process.
5.106.3 terminate
void IProcess::terminate()
Terminates (kills) a running process.
Note: It can take up to 30 seconds to get a guest process killed. In case a guest process
could not be killed an appropriate error is returned.
5.106.4 waitFor
ProcessWaitResult IProcess::waitFor(
[in] unsigned long waitFor,
[in] unsigned long timeoutMS)
waitFor Specifies what to wait for; see ProcessWaitForFlag for more information.
timeoutMS Timeout (in ms) to wait for the operation to complete. Pass 0 for an infinite timeout.
Waits for one more events to happen.
5.106.5 waitForArray
ProcessWaitResult IProcess::waitForArray(
[in] ProcessWaitForFlag waitFor[],
[in] unsigned long timeoutMS)
waitFor Specifies what to wait for; see ProcessWaitForFlag for more information.
timeoutMS Timeout (in ms) to wait for the operation to complete. Pass 0 for an infinite timeout.
Waits for one more events to happen. Scriptable version of waitFor().
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5.106.6 write
unsigned long IProcess::write(
[in] unsigned long handle,
[in] unsigned long flags,
[in] octet data[],
[in] unsigned long timeoutMS)
handle Handle to write to. Usually 0 is stdin, 1 is stdout and 2 is stderr.
flags A combination of ProcessInputFlag flags.
data Array of bytes to write. The size of the array also specifies how much to write.
timeoutMS Timeout (in ms) to wait for the operation to complete. Pass 0 for an infinite timeout.
Writes data to a running process.
5.106.7 writeArray
unsigned long IProcess::writeArray(
[in] unsigned long handle,
[in] ProcessInputFlag flags[],
[in] octet data[],
[in] unsigned long timeoutMS)
handle Handle to write to. Usually 0 is stdin, 1 is stdout and 2 is stderr.
flags A combination of ProcessInputFlag flags.
data Array of bytes to write. The size of the array also specifies how much to write.
timeoutMS Timeout (in ms) to wait for the operation to complete. Pass 0 for an infinite timeout.
Writes data to a running process. Scriptable version of write().
5.107 IProgress
The IProgress interface is used to track and control asynchronous tasks within VirtualBox.
An instance of this is returned every time VirtualBox starts an asynchronous task (in other
words, a separate thread) which continues to run after a method call returns. For example,
IConsole::saveState(), which saves the state of a running virtual machine, can take a long time
to complete. To be able to display a progress bar, a user interface such as the VirtualBox graphical
user interface can use the IProgress object returned by that method.
Note that IProgress is a “read-only” interface in the sense that only the VirtualBox internals
behind the Main API can create and manipulate progress objects, whereas client code can only
use the IProgress object to monitor a task’s progress and, if cancelable is true, cancel the task by
calling cancel().
A task represented by IProgress consists of either one or several sub-operations that run sequentially, one by one (see operation and operationCount). Every operation is identified by a
number (starting from 0) and has a separate description.
You can find the individual percentage of completion of the current operation in
operationPercent and the percentage of completion of the task as a whole in percent.
Similarly, you can wait for the completion of a particular operation via waitForOperationCompletion()
or for the completion of the whole task via waitForCompletion().
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5.107.1 Attributes
5.107.1.1 id (read-only)
uuid IProgress::id
ID of the task.
5.107.1.2 description (read-only)
wstring IProgress::description
Description of the task.
5.107.1.3 initiator (read-only)
$unknown IProgress::initiator
Initiator of the task.
5.107.1.4 cancelable (read-only)
boolean IProgress::cancelable
Whether the task can be interrupted.
5.107.1.5 percent (read-only)
unsigned long IProgress::percent
Current progress value of the task as a whole, in percent. This value depends on how many
operations are already complete. Returns 100 if completed is true.
5.107.1.6 timeRemaining (read-only)
long IProgress::timeRemaining
Estimated remaining time until the task completes, in seconds. Returns 0 once the task has
completed; returns -1 if the remaining time cannot be computed, in particular if the current
progress is 0.
Even if a value is returned, the estimate will be unreliable for low progress values. It will
become more reliable as the task progresses; it is not recommended to display an ETA before at
least 20% of a task have completed.
5.107.1.7 completed (read-only)
boolean IProgress::completed
Whether the task has been completed.
5.107.1.8 canceled (read-only)
boolean IProgress::canceled
Whether the task has been canceled.
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5.107.1.9 resultCode (read-only)
long IProgress::resultCode
Result code of the progress task. Valid only if completed is true.
5.107.1.10 errorInfo (read-only)
IVirtualBoxErrorInfo IProgress::errorInfo
Extended information about the unsuccessful result of the progress operation. May be null if
no extended information is available. Valid only if completed is true and resultCode indicates a
failure.
5.107.1.11 operationCount (read-only)
unsigned long IProgress::operationCount
Number of sub-operations this task is divided into. Every task consists of at least one suboperation.
5.107.1.12 operation (read-only)
unsigned long IProgress::operation
Number of the sub-operation being currently executed.
5.107.1.13 operationDescription (read-only)
wstring IProgress::operationDescription
Description of the sub-operation being currently executed.
5.107.1.14 operationPercent (read-only)
unsigned long IProgress::operationPercent
Progress value of the current sub-operation only, in percent.
5.107.1.15 operationWeight (read-only)
unsigned long IProgress::operationWeight
Weight value of the current sub-operation only.
5.107.1.16 timeout (read/write)
unsigned long IProgress::timeout
When non-zero, this specifies the number of milliseconds after which the operation will automatically be canceled. This can only be set on cancelable objects.
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5.107.2 cancel
void IProgress::cancel()
Cancels the task.
Note: If cancelable is false, then this method will fail.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_OBJECT_STATE: Operation cannot be canceled.
5.107.3 setCurrentOperationProgress
void IProgress::setCurrentOperationProgress(
[in] unsigned long percent)
percent
Internal method, not to be called externally.
5.107.4 setNextOperation
void IProgress::setNextOperation(
[in] wstring nextOperationDescription,
[in] unsigned long nextOperationsWeight)
nextOperationDescription
nextOperationsWeight
Internal method, not to be called externally.
5.107.5 waitForAsyncProgressCompletion
void IProgress::waitForAsyncProgressCompletion(
[in] IProgress pProgressAsync)
pProgressAsync The progress object of the asynchrony process.
Waits until the other task is completed (including all sub-operations) and forward all changes
from the other progress to this progress. This means sub-operation number, description, percent
and so on.
You have to take care on setting up at least the same count on sub-operations in this progress
object like there are in the other progress object.
If the other progress object supports cancel and this object gets any cancel request (when here
enabled as well), it will be forwarded to the other progress object.
If there is an error in the other progress, this error isn’t automatically transfered to this progress
object. So you have to check any operation error within the other progress object, after this
method returns.
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5.107.6 waitForCompletion
void IProgress::waitForCompletion(
[in] long timeout)
timeout Maximum time in milliseconds to wait or -1 to wait indefinitely.
Waits until the task is done (including all sub-operations) with a given timeout in milliseconds;
specify -1 for an indefinite wait.
Note that the VirtualBox/XPCOM/COM/native event queues of the calling thread are not processed while waiting. Neglecting event queues may have dire consequences (degrade performance, resource hogs, deadlocks, etc.), this is specially so for the main thread on platforms
using XPCOM. Callers are advised wait for short periods and service their event queues between
calls, or to create a worker thread to do the waiting.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Failed to wait for task completion.
5.107.7 waitForOperationCompletion
void IProgress::waitForOperationCompletion(
[in] unsigned long operation,
[in] long timeout)
operation Number of the operation to wait for. Must be less than operationCount.
timeout Maximum time in milliseconds to wait or -1 to wait indefinitely.
Waits until the given operation is done with a given timeout in milliseconds; specify -1 for an
indefinite wait.
See for event queue considerations.
If this method fails, the following error codes may be reported:
• VBOX_E_IPRT_ERROR: Failed to wait for operation completion.
5.108 IReusableEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Base abstract interface for all reusable events.
5.108.1 Attributes
5.108.1.1 generation (read-only)
unsigned long IReusableEvent::generation
Current generation of event, incremented on reuse.
5.108.2 reuse
void IReusableEvent::reuse()
Marks an event as reused, increments ’generation’, fields shall no longer be considered valid.
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5.109 IRuntimeErrorEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when an error happens during the virtual machine execution.
There are three kinds of runtime errors:
• fatal
• non-fatal with retry
• non-fatal warnings
Fatal errors are indicated by the fatal parameter set to true. In case of fatal errors, the virtual
machine execution is always paused before calling this notification, and the notification handler
is supposed either to immediately save the virtual machine state using IConsole::saveState() or
power it off using IConsole::powerDown(). Resuming the execution can lead to unpredictable
results.
Non-fatal errors and warnings are indicated by the fatal parameter set to false. If the virtual
machine is in the Paused state by the time the error notification is received, it means that the user
can try to resume the machine execution after attempting to solve the problem that caused the
error. In this case, the notification handler is supposed to show an appropriate message to the
user (depending on the value of the id parameter) that offers several actions such as Retry, Save
or Power Off. If the user wants to retry, the notification handler should continue the machine
execution using the IConsole::resume() call. If the machine execution is not Paused during this
notification, then it means this notification is a warning (for example, about a fatal condition that
can happen very soon); no immediate action is required from the user, the machine continues its
normal execution.
Note that in either case the notification handler must not perform any action directly on a
thread where this notification is called. Everything it is allowed to do is to post a message to
another thread that will then talk to the user and take the corresponding action.
Currently, the following error identifiers are known:
• "HostMemoryLow"
• "HostAudioNotResponding"
• "VDIStorageFull"
• "3DSupportIncompatibleAdditions"
5.109.1 Attributes
5.109.1.1 fatal (read-only)
boolean IRuntimeErrorEvent::fatal
Whether the error is fatal or not.
5.109.1.2 id (read-only)
wstring IRuntimeErrorEvent::id
Error identifier.
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5.109.1.3 message (read-only)
wstring IRuntimeErrorEvent::message
Optional error message.
5.110 ISerialPort
The ISerialPort interface represents the virtual serial port device.
The virtual serial port device acts like an ordinary serial port inside the virtual machine. This
device communicates to the real serial port hardware in one of two modes: host pipe or host
device.
In host pipe mode, the #path attribute specifies the path to the pipe on the host computer that
represents a serial port. The #server attribute determines if this pipe is created by the virtual
machine process at machine startup or it must already exist before starting machine execution.
In host device mode, the #path attribute specifies the name of the serial port device on the
host computer.
There is also a third communication mode: the disconnected mode. In this mode, the guest
OS running inside the virtual machine will be able to detect the serial port, but all port write
operations will be discarded and all port read operations will return no data.
See also: IMachine::getSerialPort()
5.110.1 Attributes
5.110.1.1 slot (read-only)
unsigned long ISerialPort::slot
Slot number this serial port is plugged into.
IMachine::getSerialPort() to obtain this instance.
Corresponds to the value you pass to
5.110.1.2 enabled (read/write)
boolean ISerialPort::enabled
Flag whether the serial port is enabled. If disabled, the serial port will not be reported to the
guest OS.
5.110.1.3 IOBase (read/write)
unsigned long ISerialPort::IOBase
Base I/O address of the serial port.
5.110.1.4 IRQ (read/write)
unsigned long ISerialPort::IRQ
IRQ number of the serial port.
5.110.1.5 hostMode (read/write)
PortMode ISerialPort::hostMode
How is this port connected to the host.
Note: Changing this attribute may fail if the conditions for path are not met.
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5.110.1.6 server (read/write)
boolean ISerialPort::server
Flag whether this serial port acts as a server (creates a new pipe on the host) or as a client
(uses the existing pipe). This attribute is used only when hostMode is PortMode_HostPipe.
5.110.1.7 path (read/write)
wstring ISerialPort::path
Path to the serial port’s pipe on the host when hostMode is PortMode_HostPipe, or the host
serial device name when hostMode is PortMode_HostDevice. For both cases, setting a null or
empty string as the attribute’s value is an error. Otherwise, the value of this property is ignored.
5.111 ISerialPortChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when a property of one of the virtual serial ports changes. Interested callees
should use ISerialPort methods and attributes to find out what has changed.
5.111.1 Attributes
5.111.1.1 serialPort (read-only)
ISerialPort ISerialPortChangedEvent::serialPort
Serial port that is subject to change.
5.112 ISession
The ISession interface represents a client process and allows for locking virtual machines (represented by IMachine objects) to prevent conflicting changes to the machine.
Any caller wishing to manipulate a virtual machine needs to create a session object first, which
lives in its own process space. Such session objects are then associated with IMachine objects
living in the VirtualBox server process to coordinate such changes.
There are two typical scenarios in which sessions are used:
• To alter machine settings or control a running virtual machine, one needs to lock a machine
for a given session (client process) by calling IMachine::lockMachine().
Whereas multiple sessions may control a running virtual machine, only one process can
obtain a write lock on the machine to prevent conflicting changes. A write lock is also
needed if a process wants to actually run a virtual machine in its own context, such as the
VirtualBox GUI or VBoxHeadless front-ends. They must also lock a machine for their own
sessions before they are allowed to power up the virtual machine.
As a result, no machine settings can be altered while another process is already using
it, either because that process is modifying machine settings or because the machine is
running.
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• To start a VM using one of the existing VirtualBox front-ends (e.g. the VirtualBox GUI or
VBoxHeadless), one would use IMachine::launchVMProcess(), which also takes a session
object as its first parameter. This session then identifies the caller and lets the caller control
the started machine (for example, pause machine execution or power it down) as well as
be notified about machine execution state changes.
How sessions objects are created in a client process depends on whether you use the Main API
via COM or via the webservice:
• When using the COM API directly, an object of the Session class from the VirtualBox type
library needs to be created. In regular COM C++ client code, this can be done by calling
createLocalObject(), a standard COM API. This object will then act as a local session
object in further calls to open a session.
• In the webservice, the session manager (IWebsessionManager) instead creates a session object automatically whenever IWebsessionManager::logon() is called. A managed object reference to that session object can be retrieved by calling IWebsessionManager::getSessionObject().
5.112.1 Attributes
5.112.1.1 state (read-only)
SessionState ISession::state
Current state of this session.
5.112.1.2 type (read-only)
SessionType ISession::type
Type of this session. The value of this attribute is valid only if the session currently has a
machine locked (i.e. its state is Locked), otherwise an error will be returned.
5.112.1.3 machine (read-only)
IMachine ISession::machine
Machine object associated with this session.
5.112.1.4 console (read-only)
IConsole ISession::console
Console object associated with this session.
5.112.2 unlockMachine
void ISession::unlockMachine()
Unlocks a machine that was previously locked for the current session.
Calling this method is required every time a machine has been locked for a particular session
using the IMachine::launchVMProcess() or IMachine::lockMachine() calls. Otherwise the state
of the machine will be set to Aborted on the server, and changes made to the machine settings
will be lost.
Generally, it is recommended to unlock all machines explicitly before terminating the application (regardless of the reason for the termination).
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Note: Do not expect the session state (state to return to “Unlocked” immediately after
you invoke this method, particularly if you have started a new VM process. The session
state will automatically return to “Unlocked” once the VM is no longer executing, which
can of course take a very long time.
If this method fails, the following error codes may be reported:
• E_UNEXPECTED: Session is not locked.
5.113 ISessionStateChangedEvent (IMachineEvent)
Note: This interface extends IMachineEvent and therefore supports all its methods and
attributes as well.
The state of the session for the given machine was changed. See also: IMachine::sessionState
5.113.1 Attributes
5.113.1.1 state (read-only)
SessionState ISessionStateChangedEvent::state
New session state.
5.114 ISharedFolder
Note: With the web service, this interface is mapped to a structure. Attributes that
return this interface will not return an object, but a complete structure containing the
attributes listed below as structure members.
The ISharedFolder interface represents a folder in the host computer’s file system accessible
from the guest OS running inside a virtual machine using an associated logical name.
There are three types of shared folders:
• Global (IVirtualBox::sharedFolders[]), shared folders available to all virtual machines.
• Permanent (IMachine::sharedFolders[]), VM-specific shared folders available to the given
virtual machine at startup.
• Transient (IConsole::sharedFolders[]), VM-specific shared folders created in the session
context (for example, when the virtual machine is running) and automatically discarded
when the session is closed (the VM is powered off).
Logical names of shared folders must be unique within the given scope (global, permanent or
transient). However, they do not need to be unique across scopes. In this case, the definition of
the shared folder in a more specific scope takes precedence over definitions in all other scopes.
The order of precedence is (more specific to more general):
1. Transient definitions
2. Permanent definitions
3. Global definitions
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For example, if MyMachine has a shared folder named C_DRIVE (that points to C:\\), then
creating a transient shared folder named C_DRIVE (that points to C:\\\\WINDOWS) will change
the definition of C_DRIVE in the guest OS so that \\\\VBOXSVR\\C_DRIVE will give access to
C:\\WINDOWS instead of C:\\ on the host PC. Removing the transient shared folder C_DRIVE
will restore the previous (permanent) definition of C_DRIVE that points to C:\\ if it still exists.
Note that permanent and transient shared folders of different machines are in different name
spaces, so they don’t overlap and don’t need to have unique logical names.
Note: Global shared folders are not implemented in the current version of the product.
5.114.1 Attributes
5.114.1.1 name (read-only)
wstring ISharedFolder::name
Logical name of the shared folder.
5.114.1.2 hostPath (read-only)
wstring ISharedFolder::hostPath
Full path to the shared folder in the host file system.
5.114.1.3 accessible (read-only)
boolean ISharedFolder::accessible
Whether the folder defined by the host path is currently accessible or not. For example, the
folder can be inaccessible if it is placed on the network share that is not available by the time
this property is read.
5.114.1.4 writable (read-only)
boolean ISharedFolder::writable
Whether the folder defined by the host path is writable or not.
5.114.1.5 autoMount (read-only)
boolean ISharedFolder::autoMount
Whether the folder gets automatically mounted by the guest or not.
5.114.1.6 lastAccessError (read-only)
wstring ISharedFolder::lastAccessError
Text message that represents the result of the last accessibility check.
Accessibility checks are performed each time the accessible attribute is read. An empty string
is returned if the last accessibility check was successful. A non-empty string indicates a failure
and should normally describe a reason of the failure (for example, a file read error).
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5.115 ISharedFolderChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when a shared folder is added or removed. The scope argument defines
one of three scopes: global shared folders (Global), permanent shared folders of the machine
(Machine) or transient shared folders of the machine (Session). Interested callees should use
query the corresponding collections to find out what has changed.
5.115.1 Attributes
5.115.1.1 scope (read-only)
Scope ISharedFolderChangedEvent::scope
Scope of the notification.
5.116 IShowWindowEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when a call to IMachine::showConsoleWindow() requests the console window to
be activated and brought to foreground on the desktop of the host PC.
This notification should cause the VM console process to perform the requested action as
described above. If it is impossible to do it at a time of this notification, this method should
return a failure.
Note that many modern window managers on many platforms implement some sort of focus
stealing prevention logic, so that it may be impossible to activate a window without the help
of the currently active application (which is supposedly an initiator of this notification). In this
case, this method must return a non-zero identifier that represents the top-level window of the
VM console process. The caller, if it represents a currently active process, is responsible to use
this identifier (in a platform-dependent manner) to perform actual window activation.
This method must set winId to zero if it has performed all actions necessary to complete the
request and the console window is now active and in foreground, to indicate that no further
action is required on the caller’s side.
5.116.1 Attributes
5.116.1.1 winId (read/write)
long long IShowWindowEvent::winId
Platform-dependent identifier of the top-level VM console window, or zero if this method has
performed all actions necessary to implement the show window semantics for the given platform
and/or this VirtualBox front-end.
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5.117 ISnapshot
The ISnapshot interface represents a snapshot of the virtual machine.
Together with the differencing media that are created when a snapshot is taken, a machine
can be brought back to the exact state it was in when the snapshot was taken.
The ISnapshot interface has no methods, only attributes; snapshots are controlled through
methods of the IConsole interface which also manage the media associated with the snapshot.
The following operations exist:
• IConsole::takeSnapshot() creates a new snapshot by creating new, empty differencing images for the machine’s media and saving the VM settings and (if the VM is running) the
current VM state in the snapshot.
The differencing images will then receive all data written to the machine’s media, while
their parent (base) images remain unmodified after the snapshot has been taken (see
IMedium for details about differencing images). This simplifies restoring a machine to
the state of a snapshot: only the differencing images need to be deleted.
The current machine state is not changed by taking a snapshot except that IMachine::currentSnapshot
is set to the newly created snapshot, which is also added to the machine’s snapshots tree.
• IConsole::restoreSnapshot() resets a machine to the state of a previous snapshot by deleting the differencing image of each of the machine’s media and setting the machine’s settings
and state to the state that was saved in the snapshot (if any).
This destroys the machine’s current state. After calling this, IMachine::currentSnapshot
points to the snapshot that was restored.
• IConsole::deleteSnapshot() deletes a snapshot without affecting the current machine state.
This does not change the current machine state, but instead frees the resources allocated
when the snapshot was taken: the settings and machine state file are deleted (if any), and
the snapshot’s differencing image for each of the machine’s media gets merged with its
parent image.
Neither the current machine state nor other snapshots are affected by this operation, except
that parent media will be modified to contain the disk data associated with the snapshot
being deleted.
When deleting the current snapshot, the IMachine::currentSnapshot attribute is set to the
current snapshot’s parent or null if it has no parent. Otherwise the attribute is unchanged.
Each snapshot contains a copy of virtual machine’s settings (hardware configuration etc.). This
copy is contained in an immutable (read-only) instance of IMachine which is available from the
snapshot’s machine attribute. When restoring the snapshot, these settings are copied back to the
original machine.
In addition, if the machine was running when the snapshot was taken (IMachine::state is
Running), the current VM state is saved in the snapshot (similarly to what happens when a VM’s
state is saved). The snapshot is then said to be online because when restoring it, the VM will be
running.
If the machine was in Saved saved, the snapshot receives a copy of the execution state file
(IMachine::stateFilePath).
Otherwise, if the machine was not running (PoweredOff or Aborted), the snapshot is offline; it
then contains a so-called “zero execution state”, representing a machine that is powered off.
5.117.1 Attributes
5.117.1.1 id (read-only)
uuid ISnapshot::id
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UUID of the snapshot.
5.117.1.2 name (read/write)
wstring ISnapshot::name
Short name of the snapshot.
Note: Setting this attribute causes IMachine::saveSettings() to be called implicitly.
5.117.1.3 description (read/write)
wstring ISnapshot::description
Optional description of the snapshot.
Note: Setting this attribute causes IMachine::saveSettings() to be called implicitly.
5.117.1.4 timeStamp (read-only)
long long ISnapshot::timeStamp
Time stamp of the snapshot, in milliseconds since 1970-01-01 UTC.
5.117.1.5 online (read-only)
boolean ISnapshot::online
true if this snapshot is an online snapshot and false otherwise.
When this attribute is true, the IMachine::stateFilePath attribute of the machine object associated with this snapshot will point to the saved state file. Otherwise, it will be an empty
string.
5.117.1.6 machine (read-only)
IMachine ISnapshot::machine
Virtual machine this snapshot is taken on. This object stores all settings the machine had when
taking this snapshot.
Note: The returned machine object is immutable, i.e. no any settings can be changed.
5.117.1.7 parent (read-only)
ISnapshot ISnapshot::parent
Parent snapshot (a snapshot this one is based on), or null if the snapshot has no parent (i.e.
is the first snapshot).
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5.117.1.8 children (read-only)
ISnapshot ISnapshot::children[]
Child snapshots (all snapshots having this one as a parent). By inspecting this attribute starting
with a machine’s root snapshot (which can be obtained by calling IMachine::findSnapshot() with
a null UUID), a machine’s snapshots tree can be iterated over.
5.117.2 getChildrenCount
unsigned long ISnapshot::getChildrenCount()
Returns the number of direct children of this snapshot.
5.118 ISnapshotChangedEvent (ISnapshotEvent)
Note: This interface extends ISnapshotEvent and therefore supports all its methods
and attributes as well.
Snapshot properties (name and/or description) have been changed. See also: ISnapshot
5.119 ISnapshotDeletedEvent (ISnapshotEvent)
Note: This interface extends ISnapshotEvent and therefore supports all its methods
and attributes as well.
Snapshot of the given machine has been deleted.
Note: This notification is delivered after the snapshot object has been uninitialized on
the server (so that any attempt to call its methods will return an error).
See also: ISnapshot
5.120 ISnapshotEvent (IMachineEvent)
Note: This interface extends IMachineEvent and therefore supports all its methods and
attributes as well.
Base interface for all snapshot events.
5.120.1 Attributes
5.120.1.1 snapshotId (read-only)
uuid ISnapshotEvent::snapshotId
ID of the snapshot this event relates to.
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5.121 ISnapshotTakenEvent (ISnapshotEvent)
Note: This interface extends ISnapshotEvent and therefore supports all its methods
and attributes as well.
A new snapshot of the machine has been taken. See also: ISnapshot
5.122 IStateChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when the execution state of the machine has changed. The new state is given.
5.122.1 Attributes
5.122.1.1 state (read-only)
MachineState IStateChangedEvent::state
New machine state.
5.123 IStorageController
Represents a storage controller that is attached to a virtual machine (IMachine). Just as drives
(hard disks, DVDs, FDs) are attached to storage controllers in a real computer, virtual drives
(represented by IMediumAttachment) are attached to virtual storage controllers, represented by
this interface.
As opposed to physical hardware, VirtualBox has a very generic concept of a storage controller,
and for purposes of the Main API, all virtual storage is attached to virtual machines via instances
of this interface. There are five types of such virtual storage controllers: IDE, SCSI, SATA, SAS
and Floppy (see bus). Depending on which of these four is used, certain sub-types may be
available and can be selected in controllerType.
Depending on these settings, the guest operating system might see significantly different virtual hardware.
5.123.1 Attributes
5.123.1.1 name (read-only)
wstring IStorageController::name
Name of the storage controller, as originally specified with IMachine::addStorageController().
This then uniquely identifies this controller with other method calls such as IMachine::attachDevice()
and IMachine::mountMedium().
5.123.1.2 maxDevicesPerPortCount (read-only)
unsigned long IStorageController::maxDevicesPerPortCount
Maximum number of devices which can be attached to one port.
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5.123.1.3 minPortCount (read-only)
unsigned long IStorageController::minPortCount
Minimum number of ports that portCount can be set to.
5.123.1.4 maxPortCount (read-only)
unsigned long IStorageController::maxPortCount
Maximum number of ports that portCount can be set to.
5.123.1.5 instance (read/write)
unsigned long IStorageController::instance
The instance number of the device in the running VM.
5.123.1.6 portCount (read/write)
unsigned long IStorageController::portCount
The number of currently usable ports on the controller. The minimum and maximum number
of ports for one controller are stored in minPortCount and maxPortCount.
5.123.1.7 bus (read-only)
StorageBus IStorageController::bus
The bus type of the storage controller (IDE, SATA, SCSI, SAS or Floppy).
5.123.1.8 controllerType (read/write)
StorageControllerType IStorageController::controllerType
The exact variant of storage controller hardware presented to the guest. Depending on this
value, VirtualBox will provide a different virtual storage controller hardware to the guest. For
SATA, SAS and floppy controllers, only one variant is available, but for IDE and SCSI, there are
several.
For SCSI controllers, the default type is LsiLogic.
5.123.1.9 useHostIOCache (read/write)
boolean IStorageController::useHostIOCache
If true, the storage controller emulation will use a dedicated I/O thread, enable the host I/O
caches and use synchronous file APIs on the host. This was the only option in the API before
VirtualBox 3.2 and is still the default for IDE controllers.
If false, the host I/O cache will be disabled for image files attached to this storage controller.
Instead, the storage controller emulation will use asynchronous I/O APIs on the host. This makes
it possible to turn off the host I/O caches because the emulation can handle unaligned access to
the file. This should be used on OS X and Linux hosts if a high I/O load is expected or many
virtual machines are running at the same time to prevent I/O cache related hangs. This option
new with the API of VirtualBox 3.2 and is now the default for non-IDE storage controllers.
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5.123.1.10 bootable (read-only)
boolean IStorageController::bootable
Returns whether it is possible to boot from disks attached to this controller.
5.124 IStorageControllerChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when a medium attachment changes.
5.125 IStorageDeviceChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when a storage device is attached or removed.
5.125.1 Attributes
5.125.1.1 storageDevice (read-only)
IMediumAttachment IStorageDeviceChangedEvent::storageDevice
Storage device that is subject to change.
5.125.1.2 removed (read-only)
boolean IStorageDeviceChangedEvent::removed
Flag whether the device was removed or added to the VM.
5.125.1.3 silent (read-only)
boolean IStorageDeviceChangedEvent::silent
Flag whether the guest should be notified about the change.
5.126 ISystemProperties
The ISystemProperties interface represents global properties of the given VirtualBox installation.
These properties define limits and default values for various attributes and parameters. Most
of the properties are read-only, but some can be changed by a user.
5.126.1 Attributes
5.126.1.1 minGuestRAM (read-only)
unsigned long ISystemProperties::minGuestRAM
Minimum guest system memory in Megabytes.
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5.126.1.2 maxGuestRAM (read-only)
unsigned long ISystemProperties::maxGuestRAM
Maximum guest system memory in Megabytes.
5.126.1.3 minGuestVRAM (read-only)
unsigned long ISystemProperties::minGuestVRAM
Minimum guest video memory in Megabytes.
5.126.1.4 maxGuestVRAM (read-only)
unsigned long ISystemProperties::maxGuestVRAM
Maximum guest video memory in Megabytes.
5.126.1.5 minGuestCPUCount (read-only)
unsigned long ISystemProperties::minGuestCPUCount
Minimum CPU count.
5.126.1.6 maxGuestCPUCount (read-only)
unsigned long ISystemProperties::maxGuestCPUCount
Maximum CPU count.
5.126.1.7 maxGuestMonitors (read-only)
unsigned long ISystemProperties::maxGuestMonitors
Maximum of monitors which could be connected.
5.126.1.8 infoVDSize (read-only)
long long ISystemProperties::infoVDSize
Maximum size of a virtual disk image in bytes. Informational value, does not reflect the limits
of any virtual disk image format.
5.126.1.9 serialPortCount (read-only)
unsigned long ISystemProperties::serialPortCount
Maximum number of serial ports associated with every IMachine instance.
5.126.1.10 parallelPortCount (read-only)
unsigned long ISystemProperties::parallelPortCount
Maximum number of parallel ports associated with every IMachine instance.
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5.126.1.11 maxBootPosition (read-only)
unsigned long ISystemProperties::maxBootPosition
Maximum device position in the boot order. This value corresponds to the total number of
devices a machine can boot from, to make it possible to include all possible devices to the boot
list. See also: IMachine::setBootOrder()
5.126.1.12 exclusiveHwVirt (read/write)
boolean ISystemProperties::exclusiveHwVirt
Exclusive use of hardware virtualization by VirtualBox. When enabled, VirtualBox assumes it
can obtain full and exclusive access to the VT-x or AMD-V feature of the host. To share hardware
virtualization with other hypervisors, this property must be disabled.
5.126.1.13 defaultMachineFolder (read/write)
wstring ISystemProperties::defaultMachineFolder
Full path to the default directory used to create new or open existing machines when a machine
settings file name contains no path.
Starting with VirtualBox 4.0, by default, this attribute contains the full path of folder named
“VirtualBox VMs” in the user’s home directory, which depends on the host platform.
When setting this attribute, a full path must be specified. Setting this property to null or an
empty string or the special value “Machines” (for compatibility reasons) will restore that default
value.
If the folder specified herein does not exist, it will be created automatically as needed.
See also: IVirtualBox::createMachine(), IVirtualBox::openMachine()
5.126.1.14 loggingLevel (read/write)
wstring ISystemProperties::loggingLevel
Specifies the logging level in current use by VirtualBox.
5.126.1.15 mediumFormats (read-only)
IMediumFormat ISystemProperties::mediumFormats[]
List of all medium storage formats supported by this VirtualBox installation.
Keep in mind that the medium format identifier (IMediumFormat::id) used in other API calls
like IVirtualBox::createHardDisk() to refer to a particular medium format is a case-insensitive
string. This means that, for example, all of the following strings:
"VDI"
"vdi"
"VdI"
refer to the same medium format.
Note that the virtual medium framework is backend-based, therefore the list of supported
formats depends on what backends are currently installed.
See also: IMediumFormat
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5.126.1.16 defaultHardDiskFormat (read/write)
wstring ISystemProperties::defaultHardDiskFormat
Identifier of the default medium format used by VirtualBox.
The medium format set by this attribute is used by VirtualBox when the medium format was
not specified explicitly. One example is IVirtualBox::createHardDisk() with the empty format
argument. A more complex example is implicit creation of differencing media when taking a
snapshot of a virtual machine: this operation will try to use a format of the parent medium
first and if this format does not support differencing media the default format specified by this
argument will be used.
The list of supported medium formats may be obtained by the mediumFormats[] call. Note
that the default medium format must have a capability to create differencing media; otherwise
operations that create media implicitly may fail unexpectedly.
The initial value of this property is "VDI" in the current version of the VirtualBox product, but
may change in the future.
Note: Setting this property to null or empty string will restore the initial value.
See also: mediumFormats[], IMediumFormat::id, IVirtualBox::createHardDisk()
5.126.1.17 freeDiskSpaceWarning (read/write)
long long ISystemProperties::freeDiskSpaceWarning
Issue a warning if the free disk space is below (or in some disk intensive operation is expected
to go below) the given size in bytes.
5.126.1.18 freeDiskSpacePercentWarning (read/write)
unsigned long ISystemProperties::freeDiskSpacePercentWarning
Issue a warning if the free disk space is below (or in some disk intensive operation is expected
to go below) the given percentage.
5.126.1.19 freeDiskSpaceError (read/write)
long long ISystemProperties::freeDiskSpaceError
Issue an error if the free disk space is below (or in some disk intensive operation is expected
to go below) the given size in bytes.
5.126.1.20 freeDiskSpacePercentError (read/write)
unsigned long ISystemProperties::freeDiskSpacePercentError
Issue an error if the free disk space is below (or in some disk intensive operation is expected
to go below) the given percentage.
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5.126.1.21 VRDEAuthLibrary (read/write)
wstring ISystemProperties::VRDEAuthLibrary
Library that provides authentication for Remote Desktop clients. The library is used if a virtual
machine’s authentication type is set to “external” in the VM RemoteDisplay configuration.
The system library extension (“.DLL” or “.so”) must be omitted. A full path can be specified; if
not, then the library must reside on the system’s default library path.
The default value of this property is "VBoxAuth". There is a library of that name in one of the
default VirtualBox library directories.
For details about VirtualBox authentication libraries and how to implement them, please refer
to the VirtualBox manual.
Note: Setting this property to null or empty string will restore the initial value.
5.126.1.22 webServiceAuthLibrary (read/write)
wstring ISystemProperties::webServiceAuthLibrary
Library that provides authentication for webservice clients. The library is used if a virtual
machine’s authentication type is set to “external” in the VM RemoteDisplay configuration and
will be called from within the IWebsessionManager::logon() implementation.
As opposed to VRDEAuthLibrary, there is no per-VM setting for this, as the webservice is a
global resource (if it is running). Only for this setting (for the webservice), setting this value to
a literal "null" string disables authentication, meaning that IWebsessionManager::logon() will
always succeed, no matter what user name and password are supplied.
The initial value of this property is "VBoxAuth", meaning that the webservice will use the
same authentication library that is used by default for VRDE (again, see VRDEAuthLibrary). The
format and calling convention of authentication libraries is the same for the webservice as it is
for VRDE.
Note: Setting this property to null or empty string will restore the initial value.
5.126.1.23 defaultVRDEExtPack (read/write)
wstring ISystemProperties::defaultVRDEExtPack
The name of the extension pack providing the default VRDE.
This attribute is for choosing between multiple extension packs providing VRDE. If only one is
installed, it will automatically be the default one. The attribute value can be empty if no VRDE
extension pack is installed.
For details about VirtualBox Remote Desktop Extension and how to implement one, please
refer to the VirtualBox SDK.
5.126.1.24 logHistoryCount (read/write)
unsigned long ISystemProperties::logHistoryCount
This value specifies how many old release log files are kept.
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5.126.1.25 defaultAudioDriver (read-only)
AudioDriverType ISystemProperties::defaultAudioDriver
This value hold the default audio driver for the current system.
5.126.1.26 autostartDatabasePath (read/write)
wstring ISystemProperties::autostartDatabasePath
The path to the autostart database. Depending on the host this might be a filesystem path or
something else.
5.126.1.27 defaultAdditionsISO (read/write)
wstring ISystemProperties::defaultAdditionsISO
The path to the default Guest Additions ISO image. Can be empty if the location is not known
in this installation.
5.126.1.28 defaultFrontend (read/write)
wstring ISystemProperties::defaultFrontend
Selects which VM frontend should be used by default when launching a VM through
the IMachine::launchVMProcess() method. Empty or null strings do not define a particular default, it is up to IMachine::launchVMProcess() to select one. See the description of
IMachine::launchVMProcess() for the valid frontend types.
This global setting is overridden by the per-VM attribute IMachine::defaultFrontend or a frontend type passed to IMachine::launchVMProcess().
5.126.2 getDefaultIoCacheSettingForStorageController
boolean ISystemProperties::getDefaultIoCacheSettingForStorageController(
[in] StorageControllerType controllerType)
controllerType The storage controller to the setting for.
Returns the default I/O cache setting for the given storage controller
5.126.3 getDeviceTypesForStorageBus
DeviceType[] ISystemProperties::getDeviceTypesForStorageBus(
[in] StorageBus bus)
bus The storage bus type to get the value for.
Returns list of all the supported device types (DeviceType) for the given type of storage bus.
5.126.4 getMaxDevicesPerPortForStorageBus
unsigned long ISystemProperties::getMaxDevicesPerPortForStorageBus(
[in] StorageBus bus)
bus The storage bus type to get the value for.
Returns the maximum number of devices which can be attached to a port for the given storage
bus.
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5.126.5 getMaxInstancesOfStorageBus
unsigned long ISystemProperties::getMaxInstancesOfStorageBus(
[in] ChipsetType chipset,
[in] StorageBus bus)
chipset The chipset type to get the value for.
bus The storage bus type to get the value for.
Returns the maximum number of storage bus instances which can be configured for each VM.
This corresponds to the number of storage controllers one can have. Value may depend on
chipset type used.
5.126.6 getMaxInstancesOfUSBControllerType
unsigned long ISystemProperties::getMaxInstancesOfUSBControllerType(
[in] ChipsetType chipset,
[in] USBControllerType type)
chipset The chipset type to get the value for.
type The USB controller type to get the value for.
Returns the maximum number of USB controller instances which can be configured for each VM.
This corresponds to the number of USB controllers one can have. Value may depend on chipset
type used.
5.126.7 getMaxNetworkAdapters
unsigned long ISystemProperties::getMaxNetworkAdapters(
[in] ChipsetType chipset)
chipset The chipset type to get the value for.
Maximum total number of network adapters associated with every IMachine instance.
5.126.8 getMaxNetworkAdaptersOfType
unsigned long ISystemProperties::getMaxNetworkAdaptersOfType(
[in] ChipsetType chipset,
[in] NetworkAttachmentType type)
chipset The chipset type to get the value for.
type Type of attachment.
Maximum number of network adapters of a given attachment type, associated with every
IMachine instance.
5.126.9 getMaxPortCountForStorageBus
unsigned long ISystemProperties::getMaxPortCountForStorageBus(
[in] StorageBus bus)
bus The storage bus type to get the value for.
Returns the maximum number of ports the given storage bus supports.
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5.126.10 getMinPortCountForStorageBus
unsigned long ISystemProperties::getMinPortCountForStorageBus(
[in] StorageBus bus)
bus The storage bus type to get the value for.
Returns the minimum number of ports the given storage bus supports.
5.127 IToken
The IToken interface represents a token passed to an API client, which triggers cleanup actions
when it is explicitly released by calling the abandon() method (preferred, as it is accurately
defined when the release happens), or when the object reference count drops to 0. The latter
way is implicitly used when an API client crashes, however the discovery that there was a crash
can take rather long, depending on the platform (COM needs 6 minutes). So better don’t rely on
the crash behavior too much.
5.127.1 abandon
void IToken::abandon()
Releases this token. Cannot be undone in any way, and makes the token object unusable (even
the dummy() method will return an error), ready for releasing. It is a more defined way than
just letting the reference count drop to 0, because the latter (depending on the platform) can
trigger asynchronous cleanup activity.
5.127.2 dummy
void IToken::dummy()
Purely a NOOP. Useful when using proxy type API bindings (e.g. the webservice) which manage objects on behalf of the actual client, using an object reference expiration time based garbage
collector.
5.128 IUSBController
5.128.1 Attributes
5.128.1.1 name (read-only)
wstring IUSBController::name
The USB Controller name.
5.128.1.2 type (read-only)
USBControllerType IUSBController::type
The USB Controller type.
5.128.1.3 USBStandard (read-only)
unsigned short IUSBController::USBStandard
USB standard version which the controller implements. This is a BCD which means that the
major version is in the high byte and minor version is in the low byte.
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5.129 IUSBControllerChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when a property of the virtual USB controllers changes. Interested callees should
use IUSBController methods and attributes to find out what has changed.
5.130 IUSBDevice
The IUSBDevice interface represents a virtual USB device attached to the virtual machine.
A collection of objects implementing this interface is stored in the IConsole::USBDevices[]
attribute which lists all USB devices attached to a running virtual machine’s USB controller.
5.130.1 Attributes
5.130.1.1 id (read-only)
uuid IUSBDevice::id
Unique USB device ID. This ID is built from #vendorId, #productId, #revision and #serialNumber.
5.130.1.2 vendorId (read-only)
unsigned short IUSBDevice::vendorId
Vendor ID.
5.130.1.3 productId (read-only)
unsigned short IUSBDevice::productId
Product ID.
5.130.1.4 revision (read-only)
unsigned short IUSBDevice::revision
Product revision number. This is a packed BCD represented as unsigned short. The high byte
is the integer part and the low byte is the decimal.
5.130.1.5 manufacturer (read-only)
wstring IUSBDevice::manufacturer
Manufacturer string.
5.130.1.6 product (read-only)
wstring IUSBDevice::product
Product string.
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5.130.1.7 serialNumber (read-only)
wstring IUSBDevice::serialNumber
Serial number string.
5.130.1.8 address (read-only)
wstring IUSBDevice::address
Host specific address of the device.
5.130.1.9 port (read-only)
unsigned short IUSBDevice::port
Host USB port number the device is physically connected to.
5.130.1.10 version (read-only)
unsigned short IUSBDevice::version
The major USB version of the device - 1 or 2.
5.130.1.11 portVersion (read-only)
unsigned short IUSBDevice::portVersion
The major USB version of the host USB port the device is physically connected to - 1 or 2. For
devices not connected to anything this will have the same value as the version attribute.
5.130.1.12 remote (read-only)
boolean IUSBDevice::remote
Whether the device is physically connected to a remote VRDE client or to a local host machine.
5.131 IUSBDeviceFilter
The IUSBDeviceFilter interface represents an USB device filter used to perform actions on a group
of USB devices.
This type of filters is used by running virtual machines to automatically capture selected USB
devices once they are physically attached to the host computer.
A USB device is matched to the given device filter if and only if all attributes of the device
match the corresponding attributes of the filter (that is, attributes are joined together using the
logical AND operation). On the other hand, all together, filters in the list of filters carry the
semantics of the logical OR operation. So if it is desirable to create a match like “this vendor
id OR this product id”, one needs to create two filters and specify “any match” (see below) for
unused attributes.
All filter attributes used for matching are strings. Each string is an expression representing a
set of values of the corresponding device attribute, that will match the given filter. Currently, the
following filtering expressions are supported:
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• Interval filters. Used to specify valid intervals for integer device attributes (Vendor ID,
Product ID and Revision). The format of the string is:
int:((m)|([m]-[n]))(,(m)|([m]-[n]))*
where m and n are integer numbers, either in octal (starting from 0), hexadecimal (starting
from 0x) or decimal (otherwise) form, so that m < n. If m is omitted before a dash (-), the
minimum possible integer is assumed; if n is omitted after a dash, the maximum possible
integer is assumed.
• Boolean filters. Used to specify acceptable values for boolean device attributes. The format
of the string is:
true|false|yes|no|0|1
• Exact match. Used to specify a single value for the given device attribute. Any string that
doesn’t start with int: represents the exact match. String device attributes are compared
to this string including case of symbols. Integer attributes are first converted to a string
(see individual filter attributes) and then compared ignoring case.
• Any match. Any value of the corresponding device attribute will match the given filter. An
empty or null string is used to construct this type of filtering expressions.
Note: On the Windows host platform, interval filters are not currently available. Also
all string filter attributes (manufacturer, product, serialNumber) are ignored, so they
behave as any match no matter what string expression is specified.
See also: IUSBDeviceFilters::deviceFilters[], IHostUSBDeviceFilter
5.131.1 Attributes
5.131.1.1 name (read/write)
wstring IUSBDeviceFilter::name
Visible name for this filter. This name is used to visually distinguish one filter from another, so
it can neither be null nor an empty string.
5.131.1.2 active (read/write)
boolean IUSBDeviceFilter::active
Whether this filter active or has been temporarily disabled.
5.131.1.3 vendorId (read/write)
wstring IUSBDeviceFilter::vendorId
Vendor ID filter. The string representation for the exact matching has the form XXXX, where X
is the hex digit (including leading zeroes).
5.131.1.4 productId (read/write)
wstring IUSBDeviceFilter::productId
Product ID filter. The string representation for the exact matching has the form XXXX, where X
is the hex digit (including leading zeroes).
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5.131.1.5 revision (read/write)
wstring IUSBDeviceFilter::revision
Product revision number filter. The string representation for the exact matching has the form
IIFF, where I is the decimal digit of the integer part of the revision, and F is the decimal digit
of its fractional part (including leading and trailing zeros). Note that for interval filters, it’s best
to use the hexadecimal form, because the revision is stored as a 16 bit packed BCD value; so the
expression int:0x0100-0x0199 will match any revision from 1.0 to 1.99.
5.131.1.6 manufacturer (read/write)
wstring IUSBDeviceFilter::manufacturer
Manufacturer filter.
5.131.1.7 product (read/write)
wstring IUSBDeviceFilter::product
Product filter.
5.131.1.8 serialNumber (read/write)
wstring IUSBDeviceFilter::serialNumber
Serial number filter.
5.131.1.9 port (read/write)
wstring IUSBDeviceFilter::port
Host USB port filter.
5.131.1.10 remote (read/write)
wstring IUSBDeviceFilter::remote
Remote state filter.
Note: This filter makes sense only for machine USB filters, i.e. it is ignored by IHostUSBDeviceFilter objects.
5.131.1.11 maskedInterfaces (read/write)
unsigned long IUSBDeviceFilter::maskedInterfaces
This is an advanced option for hiding one or more USB interfaces from the guest. The value is
a bit mask where the bits that are set means the corresponding USB interface should be hidden,
masked off if you like. This feature only works on Linux hosts.
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5.132 IUSBDeviceFilters
5.132.1 Attributes
5.132.1.1 deviceFilters (read-only)
IUSBDeviceFilter IUSBDeviceFilters::deviceFilters[]
List of USB device filters associated with the machine.
If the machine is currently running, these filters are activated every time a new (supported) USB device is attached to the host computer that was not ignored by global filters
(IHost::USBDeviceFilters[]).
These filters are also activated when the machine is powered up. They are run against a list
of all currently available USB devices (in states Available, Busy, Held) that were not previously
ignored by global filters.
If at least one filter matches the USB device in question, this device is automatically captured
(attached to) the virtual USB controller of this machine.
See also: IUSBDeviceFilter, IUSBController
5.132.2 createDeviceFilter
IUSBDeviceFilter IUSBDeviceFilters::createDeviceFilter(
[in] wstring name)
name Filter name. See IUSBDeviceFilter::name for more info.
Creates a new USB device filter. All attributes except the filter name are set to empty (any
match), active is false (the filter is not active).
The created filter can then be added to the list of filters using insertDeviceFilter().
See also: deviceFilters[]
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: The virtual machine is not mutable.
5.132.3 insertDeviceFilter
void IUSBDeviceFilters::insertDeviceFilter(
[in] unsigned long position,
[in] IUSBDeviceFilter filter)
position Position to insert the filter to.
filter USB device filter to insert.
Inserts the given USB device to the specified position in the list of filters.
Positions are numbered starting from 0. If the specified position is equal to or greater than the
number of elements in the list, the filter is added to the end of the collection.
Note: Duplicates are not allowed, so an attempt to insert a filter that is already in the
collection, will return an error.
See also: deviceFilters[]
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine is not mutable.
• E_INVALIDARG: USB device filter not created within this VirtualBox instance.
• VBOX_E_INVALID_OBJECT_STATE: USB device filter already in list.
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5.132.4 removeDeviceFilter
IUSBDeviceFilter IUSBDeviceFilters::removeDeviceFilter(
[in] unsigned long position)
position Position to remove the filter from.
Removes a USB device filter from the specified position in the list of filters.
Positions are numbered starting from 0. Specifying a position equal to or greater than the
number of elements in the list will produce an error.
See also: deviceFilters[]
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine is not mutable.
• E_INVALIDARG: USB device filter list empty or invalid position.
5.133 IUSBDeviceStateChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when a USB device is attached to or detached from the virtual USB controller.
This notification is sent as a result of the indirect request to attach the device because
it matches one of the machine USB filters, or as a result of the direct request issued by
IConsole::attachUSBDevice() or IConsole::detachUSBDevice().
This notification is sent in case of both a succeeded and a failed request completion. When the
request succeeds, the error parameter is null, and the given device has been already added to
(when attached is true) or removed from (when attached is false) the collection represented
by IConsole::USBDevices[]. On failure, the collection doesn’t change and the error parameter
represents the error message describing the failure.
5.133.1 Attributes
5.133.1.1 device (read-only)
IUSBDevice IUSBDeviceStateChangedEvent::device
Device that is subject to state change.
5.133.1.2 attached (read-only)
boolean IUSBDeviceStateChangedEvent::attached
true if the device was attached and false otherwise.
5.133.1.3 error (read-only)
IVirtualBoxErrorInfo IUSBDeviceStateChangedEvent::error
null on success or an error message object on failure.
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5.134 IVBoxSVCAvailabilityChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when VBoxSVC becomes unavailable (due to a crash or similar unexpected circumstances) or available again.
5.134.1 Attributes
5.134.1.1 available (read-only)
boolean IVBoxSVCAvailabilityChangedEvent::available
Whether VBoxSVC is available now.
5.135 IVFSExplorer
The VFSExplorer interface unifies access to different file system types. This includes local file
systems as well remote file systems like S3. For a list of supported types see VFSType. An
instance of this is returned by IAppliance::createVFSExplorer().
5.135.1 Attributes
5.135.1.1 path (read-only)
wstring IVFSExplorer::path
Returns the current path in the virtual file system.
5.135.1.2 type (read-only)
VFSType IVFSExplorer::type
Returns the file system type which is currently in use.
5.135.2 cd
IProgress IVFSExplorer::cd(
[in] wstring dir)
dir The name of the directory to go in.
Change the current directory level.
5.135.3 cdUp
IProgress IVFSExplorer::cdUp()
Go one directory upwards from the current directory level.
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5.135.4 entryList
void IVFSExplorer::entryList(
[out] wstring names[],
[out] unsigned long types[],
[out] long long sizes[],
[out] unsigned long modes[])
names The list of names for the entries.
types The list of types for the entries.
sizes The list of sizes (in bytes) for the entries.
modes The list of file modes (in octal form) for the entries.
Returns a list of files/directories after a call to update(). The user is responsible for keeping this
internal list up do date.
5.135.5 exists
wstring[] IVFSExplorer::exists(
[in] wstring names[])
names The names to check.
Checks if the given file list exists in the current directory level.
5.135.6 remove
IProgress IVFSExplorer::remove(
[in] wstring names[])
names The names to remove.
Deletes the given files in the current directory level.
5.135.7 update
IProgress IVFSExplorer::update()
Updates the internal list of files/directories from the current directory level. Use entryList() to
get the full list after a call to this method.
5.136 IVRDEServer
5.136.1 Attributes
5.136.1.1 enabled (read/write)
boolean IVRDEServer::enabled
Flag if VRDE server is enabled.
5.136.1.2 authType (read/write)
AuthType IVRDEServer::authType
VRDE authentication method.
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5.136.1.3 authTimeout (read/write)
unsigned long IVRDEServer::authTimeout
Timeout for guest authentication. Milliseconds.
5.136.1.4 allowMultiConnection (read/write)
boolean IVRDEServer::allowMultiConnection
Flag whether multiple simultaneous connections to the VM are permitted. Note that this will
be replaced by a more powerful mechanism in the future.
5.136.1.5 reuseSingleConnection (read/write)
boolean IVRDEServer::reuseSingleConnection
Flag whether the existing connection must be dropped and a new connection must be established by the VRDE server, when a new client connects in single connection mode.
5.136.1.6 VRDEExtPack (read/write)
wstring IVRDEServer::VRDEExtPack
The name of Extension Pack providing VRDE for this VM. Overrides ISystemProperties::defaultVRDEExtPack.
5.136.1.7 authLibrary (read/write)
wstring IVRDEServer::authLibrary
Library used for authentication of RDP clients by this VM. Overrides ISystemProperties::VRDEAuthLibrary.
5.136.1.8 VRDEProperties (read-only)
wstring IVRDEServer::VRDEProperties[]
Array of names of properties, which are supported by this VRDE server.
5.136.2 getVRDEProperty
wstring IVRDEServer::getVRDEProperty(
[in] wstring key)
key Name of the key to get.
Returns a VRDE specific property string.
If the requested data key does not exist, this function will succeed and return an empty string
in the value argument.
5.136.3 setVRDEProperty
void IVRDEServer::setVRDEProperty(
[in] wstring key,
[in] wstring value)
key Name of the key to set.
value Value to assign to the key.
Sets a VRDE specific property string.
If you pass null or empty string as a key value, the given key will be deleted.
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5.137 IVRDEServerChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when a property of the VRDE server changes. Interested callees should use IVRDEServer methods and attributes to find out what has changed.
5.138 IVRDEServerInfo
Note: With the web service, this interface is mapped to a structure. Attributes that
return this interface will not return an object, but a complete structure containing the
attributes listed below as structure members.
Contains information about the remote desktop (VRDE) server capabilities and status. This is
used in the IConsole::VRDEServerInfo attribute.
5.138.1 Attributes
5.138.1.1 active (read-only)
boolean IVRDEServerInfo::active
Whether the remote desktop connection is active.
5.138.1.2 port (read-only)
long IVRDEServerInfo::port
VRDE server port number. If this property is equal to 0, then the VRDE server failed to start,
usually because there are no free IP ports to bind to. If this property is equal to -1, then the
VRDE server has not yet been started.
5.138.1.3 numberOfClients (read-only)
unsigned long IVRDEServerInfo::numberOfClients
How many times a client connected.
5.138.1.4 beginTime (read-only)
long long IVRDEServerInfo::beginTime
When the last connection was established, in milliseconds since 1970-01-01 UTC.
5.138.1.5 endTime (read-only)
long long IVRDEServerInfo::endTime
When the last connection was terminated or the current time, if connection is still active, in
milliseconds since 1970-01-01 UTC.
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5.138.1.6 bytesSent (read-only)
long long IVRDEServerInfo::bytesSent
How many bytes were sent in last or current, if still active, connection.
5.138.1.7 bytesSentTotal (read-only)
long long IVRDEServerInfo::bytesSentTotal
How many bytes were sent in all connections.
5.138.1.8 bytesReceived (read-only)
long long IVRDEServerInfo::bytesReceived
How many bytes were received in last or current, if still active, connection.
5.138.1.9 bytesReceivedTotal (read-only)
long long IVRDEServerInfo::bytesReceivedTotal
How many bytes were received in all connections.
5.138.1.10 user (read-only)
wstring IVRDEServerInfo::user
Login user name supplied by the client.
5.138.1.11 domain (read-only)
wstring IVRDEServerInfo::domain
Login domain name supplied by the client.
5.138.1.12 clientName (read-only)
wstring IVRDEServerInfo::clientName
The client name supplied by the client.
5.138.1.13 clientIP (read-only)
wstring IVRDEServerInfo::clientIP
The IP address of the client.
5.138.1.14 clientVersion (read-only)
unsigned long IVRDEServerInfo::clientVersion
The client software version number.
5.138.1.15 encryptionStyle (read-only)
unsigned long IVRDEServerInfo::encryptionStyle
Public key exchange method used when connection was established. Values: 0 - RDP4 public
key exchange scheme. 1 - X509 certificates were sent to client.
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5.139 IVRDEServerInfoChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when the status of the VRDE server changes. Interested callees should use
IVRDEServerInfo attributes to find out what is the current status.
5.140 IVetoEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Base abstract interface for veto events.
5.140.1 addVeto
void IVetoEvent::addVeto(
[in] wstring reason)
reason Reason for veto, could be null or empty string.
Adds a veto on this event.
5.140.2 getVetos
wstring[] IVetoEvent::getVetos()
Current veto reason list, if size is 0 - no veto.
5.140.3 isVetoed
boolean IVetoEvent::isVetoed()
If this event was vetoed.
5.141 IVideoCaptureChangedEvent (IEvent)
Note: This interface extends IEvent and therefore supports all its methods and attributes as well.
Notification when video capture settings have changed.
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5.142 IVirtualBox
The IVirtualBox interface represents the main interface exposed by the product that provides
virtual machine management.
An instance of IVirtualBox is required for the product to do anything useful. Even though the
interface does not expose this, internally, IVirtualBox is implemented as a singleton and actually
lives in the process of the VirtualBox server (VBoxSVC.exe). This makes sure that IVirtualBox can
track the state of all virtual machines on a particular host, regardless of which frontend started
them.
To enumerate all the virtual machines on the host, use the machines[] attribute.
5.142.1 Attributes
5.142.1.1 version (read-only)
wstring IVirtualBox::version
A string representing the version number of the product. The format is 3 integer numbers
divided by dots (e.g. 1.0.1). The last number represents the build number and will frequently
change.
This may be followed by a _ALPHA[0-9]*, _BETA[0-9]* or _RC[0-9]* tag in prerelease builds.
Non-Oracle builds may (/shall) also have a publisher tag, at the end. The publisher tag starts
with an underscore just like the prerelease build type tag.
5.142.1.2 versionNormalized (read-only)
wstring IVirtualBox::versionNormalized
A string representing the version number of the product, without the publisher information
(but still with other tags). See version.
5.142.1.3 revision (read-only)
unsigned long IVirtualBox::revision
The internal build revision number of the product.
5.142.1.4 packageType (read-only)
wstring IVirtualBox::packageType
A string representing the package type of this product. The format is OS_ARCH_DIST where
OS is either WINDOWS, LINUX, SOLARIS, DARWIN. ARCH is either 32BITS or 64BITS. DIST is
either GENERIC, UBUNTU_606, UBUNTU_710, or something like this.
5.142.1.5 APIVersion (read-only)
wstring IVirtualBox::APIVersion
A string representing the VirtualBox API version number. The format is 2 integer numbers
divided by an underscore (e.g. 1_0). After the first public release of packages with a particular
API version the API will not be changed in an incompatible way. Note that this guarantee does
not apply to development builds, and also there is no guarantee that this version is identical to
the first two integer numbers of the package version.
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5.142.1.6 homeFolder (read-only)
wstring IVirtualBox::homeFolder
Full path to the directory where the global settings file, VirtualBox.xml, is stored.
In this version of VirtualBox, the value of this property is always <user_dir>/.VirtualBox
(where <user_dir> is the path to the user directory, as determined by the host OS), and cannot
be changed.
This path is also used as the base to resolve relative paths in places where relative paths are
allowed (unless otherwise expressly indicated).
5.142.1.7 settingsFilePath (read-only)
wstring IVirtualBox::settingsFilePath
Full name of the global settings file. The value of this property corresponds to the value of
homeFolder plus /VirtualBox.xml.
5.142.1.8 host (read-only)
IHost IVirtualBox::host
Associated host object.
5.142.1.9 systemProperties (read-only)
ISystemProperties IVirtualBox::systemProperties
Associated system information object.
5.142.1.10 machines (read-only)
IMachine IVirtualBox::machines[]
Array of machine objects registered within this VirtualBox instance.
5.142.1.11 machineGroups (read-only)
wstring IVirtualBox::machineGroups[]
Array of all machine group names which are used by the machines which are accessible. Each
group is only listed once, however they are listed in no particular order and there is no guarantee
that there are no gaps in the group hierarchy (i.e. "/", "/group/subgroup" is a valid result).
5.142.1.12 hardDisks (read-only)
IMedium IVirtualBox::hardDisks[]
Array of medium objects known to this VirtualBox installation.
This array contains only base media. All differencing media of the given base medium can be
enumerated using IMedium::children[].
5.142.1.13 DVDImages (read-only)
IMedium IVirtualBox::DVDImages[]
Array of CD/DVD image objects currently in use by this VirtualBox instance.
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5.142.1.14 floppyImages (read-only)
IMedium IVirtualBox::floppyImages[]
Array of floppy image objects currently in use by this VirtualBox instance.
5.142.1.15 progressOperations (read-only)
IProgress IVirtualBox::progressOperations[]
5.142.1.16 guestOSTypes (read-only)
IGuestOSType IVirtualBox::guestOSTypes[]
5.142.1.17 sharedFolders (read-only)
ISharedFolder IVirtualBox::sharedFolders[]
Collection of global shared folders. Global shared folders are available to all virtual machines.
New shared folders are added to the collection using createSharedFolder(). Existing shared
folders can be removed using removeSharedFolder().
Note: In the current version of the product, global shared folders are not implemented
and therefore this collection is always empty.
5.142.1.18 performanceCollector (read-only)
IPerformanceCollector IVirtualBox::performanceCollector
Associated performance collector object.
5.142.1.19 DHCPServers (read-only)
IDHCPServer IVirtualBox::DHCPServers[]
DHCP servers.
5.142.1.20 NATNetworks (read-only)
INATNetwork IVirtualBox::NATNetworks[]
5.142.1.21 eventSource (read-only)
IEventSource IVirtualBox::eventSource
Event source for VirtualBox events.
5.142.1.22 extensionPackManager (read-only)
IExtPackManager IVirtualBox::extensionPackManager
Note: This attribute is not supported in the web service.
The extension pack manager.
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5.142.1.23 internalNetworks (read-only)
wstring IVirtualBox::internalNetworks[]
Names of all internal networks.
5.142.1.24 genericNetworkDrivers (read-only)
wstring IVirtualBox::genericNetworkDrivers[]
Names of all generic network drivers.
5.142.2 checkFirmwarePresent
boolean IVirtualBox::checkFirmwarePresent(
[in] FirmwareType firmwareType,
[in] wstring version,
[out] wstring url,
[out] wstring file)
firmwareType Type of firmware to check.
version Expected version number, usually empty string (presently ignored).
url Suggested URL to download this firmware from.
file Filename of firmware, only valid if result == TRUE.
Check if this VirtualBox installation has a firmware of the given type available, either systemwide or per-user. Optionally, this may return a hint where this firmware can be downloaded
from.
5.142.3 composeMachineFilename
wstring IVirtualBox::composeMachineFilename(
[in] wstring name,
[in] wstring group,
[in] wstring createFlags,
[in] wstring baseFolder)
name Suggested machine name.
group Machine group name for the new machine or machine group. It is used to determine the
right subdirectory.
createFlags Machine creation flags, see createMachine() (optional).
baseFolder Base machine folder (optional).
Returns a recommended full path of the settings file name for a new virtual machine.
This API serves two purposes:
• It gets called by createMachine() if null or empty string (which is recommended) is specified for the settingsFile argument there, which means that API should use a recommended default file name.
• It can be called manually by a client software before creating a machine, e.g. if that client
wants to pre-create the machine directory to create virtual hard disks in that directory
together with the new machine settings file. In that case, the file name should be stripped
from the full settings file path returned by this function to obtain the machine directory.
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See IMachine::name and createMachine() for more details about the machine name.
groupName defines which additional subdirectory levels should be included. It must be either a
valid group name or null or empty string which designates that the machine will not be related
to a machine group.
If baseFolder is a null or empty string (which is recommended), the default machine settings folder (see ISystemProperties::defaultMachineFolder) will be used as a base folder for the
created machine, resulting in a file name like “/home/user/VirtualBox VMs/name/name.vbox”.
Otherwise the given base folder will be used.
This method does not access the host disks. In particular, it does not check for whether a
machine with this name already exists.
5.142.4 createAppliance
IAppliance IVirtualBox::createAppliance()
Creates a new appliance object, which represents an appliance in the Open Virtual Machine
Format (OVF). This can then be used to import an OVF appliance into VirtualBox or to export
machines as an OVF appliance; see the documentation for IAppliance for details.
5.142.5 createDHCPServer
IDHCPServer IVirtualBox::createDHCPServer(
[in] wstring name)
name server name
Creates a DHCP server settings to be used for the given internal network name
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Host network interface name already exists.
5.142.6 createHardDisk
IMedium IVirtualBox::createHardDisk(
[in] wstring format,
[in] wstring location)
format Identifier of the storage format to use for the new medium.
location Location of the storage unit for the new medium.
Creates a new base medium object that will use the given storage format and location for
medium data.
The actual storage unit is not created by this method. In order to do it, and before you are able
to attach the created medium to virtual machines, you must call one of the following methods to
allocate a format-specific storage unit at the specified location:
• IMedium::createBaseStorage()
• IMedium::createDiffStorage()
Some medium attributes, such as IMedium::id, may remain uninitialized until the medium
storage unit is successfully created by one of the above methods.
After the storage unit is successfully created, it will be accessible through the openMedium()
method and can be found in the hardDisks[] array.
The list of all storage formats supported by this VirtualBox installation can be obtained using
ISystemProperties::mediumFormats[]. If the format attribute is empty or null then the default
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storage format specified by ISystemProperties::defaultHardDiskFormat will be used for creating
a storage unit of the medium.
Note that the format of the location string is storage format specific. See IMedium::location
and IMedium for more details.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: format identifier is invalid. See ISystemProperties::mediumFormats[].
• VBOX_E_FILE_ERROR: location is a not valid file name (for file-based formats only).
5.142.7 createMachine
IMachine IVirtualBox::createMachine(
[in] wstring settingsFile,
[in] wstring name,
[in] wstring groups[],
[in] wstring osTypeId,
[in] wstring flags)
settingsFile Fully qualified path where the settings file should be created, empty string or null
for a default folder and file based on the name argument and the primary group. (see
composeMachineFilename()).
name Machine name.
groups Array of group names. null or an empty array have the same meaning as an array with
just the empty string or "/", i.e. create a machine without group association.
osTypeId Guest OS Type ID.
flags Additional property parameters, passed as a comma-separated list of “name=value”
type entries. The following ones are recognized: forceOverwrite=1 to overwrite
an existing machine settings file, UUID=<uuid> to specify a machine UUID and
directoryIncludesUUID=1 to switch to a special VM directory naming scheme which
should not be used unless necessary.
Creates a new virtual machine by creating a machine settings file at the given location.
VirtualBox machine settings files use a custom XML dialect. Starting with VirtualBox 4.0,
a “.vbox” extension is recommended, but not enforced, and machine files can be created at
arbitrary locations.
However, it is recommended that machines are created in the default machine folder (e.g.
“/home/user/VirtualBox VMs/name/name.vbox”; see ISystemProperties::defaultMachineFolder).
If you specify null or empty string (which is recommended) for the settingsFile argument,
composeMachineFilename() is called automatically to have such a recommended name composed based on the machine name given in the name argument and the primary group.
If the resulting settings file already exists, this method will fail, unless the forceOverwrite flag
is set.
The new machine is created unregistered, with the initial configuration set according to the
specified guest OS type. A typical sequence of actions to create a new virtual machine is as
follows:
1. Call this method to have a new machine created. The returned machine object will be
“mutable” allowing to change any machine property.
2. Configure the machine using the appropriate attributes and methods.
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3. Call IMachine::saveSettings() to write the settings to the machine’s XML settings file. The
configuration of the newly created machine will not be saved to disk until this method is
called.
4. Call registerMachine() to add the machine to the list of machines known to VirtualBox.
The specified guest OS type identifier must match an ID of one of known guest OS types listed
in the guestOSTypes[] array.
Note: IMachine::settingsModified will return false for the created machine, until any
of machine settings are changed.
Note: There is no way to change the name of the settings file or subfolder of the created
machine directly.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: osTypeId is invalid.
• VBOX_E_FILE_ERROR: Resulting settings file name is invalid or the settings file already
exists or could not be created due to an I/O error.
• E_INVALIDARG: name is empty or null.
5.142.8 createNATNetwork
INATNetwork IVirtualBox::createNATNetwork(
[in] wstring networkName)
networkName
5.142.9 createSharedFolder
void IVirtualBox::createSharedFolder(
[in] wstring name,
[in] wstring hostPath,
[in] boolean writable,
[in] boolean automount)
name Unique logical name of the shared folder.
hostPath Full path to the shared folder in the host file system.
writable Whether the share is writable or readonly
automount Whether the share gets automatically mounted by the guest or not.
Creates a new global shared folder by associating the given logical name with the given host
path, adds it to the collection of shared folders and starts sharing it. Refer to the description of
ISharedFolder to read more about logical names.
Note: In the current implementation, this operation is not implemented.
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5.142.10 findDHCPServerByNetworkName
IDHCPServer IVirtualBox::findDHCPServerByNetworkName(
[in] wstring name)
name server name
Searches a DHCP server settings to be used for the given internal network name
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Host network interface name already exists.
5.142.11 findMachine
IMachine IVirtualBox::findMachine(
[in] wstring nameOrId)
nameOrId What to search for. This can either be the UUID or the name of a virtual machine.
Attempts to find a virtual machine given its name or UUID.
Note: Inaccessible machines cannot be found by name, only by UUID, because their
name cannot safely be determined.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: Could not find registered machine matching nameOrId.
5.142.12 findNATNetworkByName
INATNetwork IVirtualBox::findNATNetworkByName(
[in] wstring networkName)
networkName
5.142.13 getExtraData
wstring IVirtualBox::getExtraData(
[in] wstring key)
key Name of the data key to get.
Returns associated global extra data.
If the requested data key does not exist, this function will succeed and return an empty string
in the value argument.
If this method fails, the following error codes may be reported:
• VBOX_E_FILE_ERROR: Settings file not accessible.
• VBOX_E_XML_ERROR: Could not parse the settings file.
5.142.14 getExtraDataKeys
wstring[] IVirtualBox::getExtraDataKeys()
Returns an array representing the global extra data keys which currently have values defined.
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5.142.15 getGuestOSType
IGuestOSType IVirtualBox::getGuestOSType(
[in] uuid id)
id Guest OS type ID string.
Returns an object describing the specified guest OS type.
The requested guest OS type is specified using a string which is a mnemonic identifier of the
guest operating system, such as "win31" or "ubuntu". The guest OS type ID of a particular
virtual machine can be read or set using the IMachine::OSTypeId attribute.
The guestOSTypes[] collection contains all available guest OS type objects. Each object has an
IGuestOSType::id attribute which contains an identifier of the guest OS this object describes.
If this method fails, the following error codes may be reported:
• E_INVALIDARG: id is not a valid Guest OS type.
5.142.16 getMachineStates
MachineState[] IVirtualBox::getMachineStates(
[in] IMachine machines[])
machines Array with the machine references.
Gets the state of several machines in a single operation.
5.142.17 getMachinesByGroups
IMachine[] IVirtualBox::getMachinesByGroups(
[in] wstring groups[])
groups What groups to match. The usual group list rules apply, i.e. passing an empty list will
match VMs in the toplevel group, likewise the empty string.
Gets all machine references which are in one of the specified groups.
5.142.18 openMachine
IMachine IVirtualBox::openMachine(
[in] wstring settingsFile)
settingsFile Name of the machine settings file.
Opens a virtual machine from the existing settings file. The opened machine remains unregistered until you call registerMachine().
The specified settings file name must be fully qualified. The file must exist and be a valid
machine XML settings file whose contents will be used to construct the machine object.
Note: IMachine::settingsModified will return false for the opened machine, until any
of machine settings are changed.
If this method fails, the following error codes may be reported:
• VBOX_E_FILE_ERROR: Settings file name invalid, not found or sharing violation.
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5 Classes (interfaces)
5.142.19 openMedium
IMedium IVirtualBox::openMedium(
[in] wstring location,
[in] DeviceType deviceType,
[in] AccessMode accessMode,
[in] boolean forceNewUuid)
location Location of the storage unit that contains medium data in one of the supported storage
formats.
deviceType Must be one of “HardDisk”, “DVD” or “Floppy”.
accessMode Whether to open the image in read/write or read-only mode. For a “DVD” device
type, this is ignored and read-only mode is always assumed.
forceNewUuid Allows the caller to request a completely new medium UUID for the image which
is to be opened. Useful if one intends to open an exact copy of a previously opened image,
as this would normally fail due to the duplicate UUID.
Finds existing media or opens a medium from an existing storage location.
Once a medium has been opened, it can be passed to other VirtualBox methods, in particular
to IMachine::attachDevice().
Depending on the given device type, the file at the storage location must be in one of the media
formats understood by VirtualBox:
• With a “HardDisk” device type, the file must be a hard disk image in one of the formats
supported by VirtualBox (see ISystemProperties::mediumFormats[]). After this method
succeeds, if the medium is a base medium, it will be added to the hardDisks[] array attribute.
• With a “DVD” device type, the file must be an ISO 9960 CD/DVD image. After this method
succeeds, the medium will be added to the DVDImages[] array attribute.
• With a “Floppy” device type, the file must be an RAW floppy image. After this method
succeeds, the medium will be added to the floppyImages[] array attribute.
After having been opened, the medium can be re-found by this method and can be attached to
virtual machines. See IMedium for more details.
The UUID of the newly opened medium will either be retrieved from the storage location, if
the format supports it (e.g. for hard disk images), or a new UUID will be randomly generated
(e.g. for ISO and RAW files). If for some reason you need to change the medium’s UUID, use
IMedium::setIds().
If a differencing hard disk medium is to be opened by this method, the operation will succeed only if its parent medium and all ancestors, if any, are already known to this VirtualBox
installation (for example, were opened by this method before).
This method attempts to guess the storage format of the specified medium by reading medium
data at the specified location.
If accessMode is ReadWrite (which it should be for hard disks and floppies), the image is
opened for read/write access and must have according permissions, as VirtualBox may actually
write status information into the disk’s metadata sections.
Note that write access is required for all typical hard disk usage in VirtualBox, since VirtualBox
may need to write metadata such as a UUID into the image. The only exception is opening a
source image temporarily for copying and cloning (see IMedium::cloneTo() when the image will
be closed again soon.
The format of the location string is storage format specific. See IMedium::location and
IMedium for more details.
If this method fails, the following error codes may be reported:
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5 Classes (interfaces)
• VBOX_E_FILE_ERROR: Invalid medium storage file location or could not find the medium
at the specified location.
• VBOX_E_IPRT_ERROR: Could not get medium storage format.
• E_INVALIDARG: Invalid medium storage format.
• VBOX_E_INVALID_OBJECT_STATE: Medium has already been added to a media registry.
5.142.20 registerMachine
void IVirtualBox::registerMachine(
[in] IMachine machine)
machine
Registers the machine previously created using createMachine() or opened using openMachine()
within this VirtualBox installation. After successful method invocation, the IMachineRegisteredEvent
event is fired.
Note: This method implicitly calls IMachine::saveSettings() to save all current machine
settings before registering it.
If this method fails, the following error codes may be reported:
• VBOX_E_OBJECT_NOT_FOUND: No matching virtual machine found.
• VBOX_E_INVALID_OBJECT_STATE:
VirtualBox instance.
Virtual machine was not created within this
5.142.21 removeDHCPServer
void IVirtualBox::removeDHCPServer(
[in] IDHCPServer server)
server DHCP server settings to be removed
Removes the DHCP server settings
If this method fails, the following error codes may be reported:
• E_INVALIDARG: Host network interface name already exists.
5.142.22 removeNATNetwork
void IVirtualBox::removeNATNetwork(
[in] INATNetwork network)
network
5.142.23 removeSharedFolder
void IVirtualBox::removeSharedFolder(
[in] wstring name)
name Logical name of the shared folder to remove.
Removes the global shared folder with the given name previously created by createSharedFolder()
from the collection of shared folders and stops sharing it.
Note: In the current implementation, this operation is not implemented.
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5 Classes (interfaces)
5.142.24 setExtraData
void IVirtualBox::setExtraData(
[in] wstring key,
[in] wstring value)
key Name of the data key to set.
value Value to assign to the key.
Sets associated global extra data.
If you pass null or empty string as a key value, the given key will be deleted.
Note: Before performing the actual data change, this method will ask all registered
event listener using the IExtraDataCanChangeEvent notification for a permission. If
one of the listeners refuses the new value, the change will not be performed.
Note: On success, the IExtraDataChangedEvent notification is called to inform all registered listeners about a successful data change.
If this method fails, the following error codes may be reported:
• VBOX_E_FILE_ERROR: Settings file not accessible.
• VBOX_E_XML_ERROR: Could not parse the settings file.
• E_ACCESSDENIED: Modification request refused.
5.142.25 setSettingsSecret
void IVirtualBox::setSettingsSecret(
[in] wstring password)
password The cipher key.
Unlocks the secret data by passing the unlock password to the server. The server will cache
the password for that machine.
If this method fails, the following error codes may be reported:
• VBOX_E_INVALID_VM_STATE: Virtual machine is not mutable.
5.143 IVirtualBoxClient
Note: This interface is not supported in the web service.
Convenience interface for client applications. Treat this as a singleton, i.e. never create more
than one instance of this interface.
At the moment only available for clients of the local API (not usable via the webservice). Once
the session logic is redesigned this might change.
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5 Classes (interfaces)
5.143.1 Attributes
5.143.1.1 virtualBox (read-only)
IVirtualBox IVirtualBoxClient::virtualBox
Reference to the server-side API root object.
5.143.1.2 session (read-only)
ISession IVirtualBoxClient::session
Create a new session object and return the reference to it.
5.143.1.3 eventSource (read-only)
IEventSource IVirtualBoxClient::eventSource
Event source for VirtualBoxClient events.
5.143.2 checkMachineError
void IVirtualBoxClient::checkMachineError(
[in] IMachine machine)
machine The machine object to check.
Perform error checking before using an IMachine object. Generally useful before starting a VM
and all other uses. If anything is not as it should be then this method will return an appropriate
error.
5.144 IVirtualBoxErrorInfo
The IVirtualBoxErrorInfo interface represents extended error information.
Extended error information can be set by VirtualBox components after unsuccessful or partially successful method invocation. This information can be retrieved by the calling party as an
IVirtualBoxErrorInfo object and then shown to the client in addition to the plain 32-bit result
code.
In MS COM, this interface extends the IErrorInfo interface, in XPCOM, it extends the nsIException interface. In both cases, it provides a set of common attributes to retrieve error information.
Sometimes invocation of some component’s method may involve methods of other components
that may also fail (independently of this method’s failure), or a series of non-fatal errors may
precede a fatal error that causes method failure. In cases like that, it may be desirable to preserve
information about all errors happened during method invocation and deliver it to the caller. The
next attribute is intended specifically for this purpose and allows to represent a chain of errors
through a single IVirtualBoxErrorInfo object set after method invocation.
Note: errors are stored to a chain in the reverse order, i.e. the initial error object you
query right after method invocation is the last error set by the callee, the object it points
to in the next attribute is the previous error and so on, up to the first error (which is
the last in the chain).
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5 Classes (interfaces)
5.144.1 Attributes
5.144.1.1 resultCode (read-only)
long IVirtualBoxErrorInfo::resultCode
Result code of the error. Usually, it will be the same as the result code returned by the method
that provided this error information, but not always. For example, on Win32, CoCreateInstance()
will most likely return E_NOINTERFACE upon unsuccessful component instantiation attempt, but
not the value the component factory returned. Value is typed ’long’, not ’result’, to make interface
usable from scripting languages.
Note: In MS COM, there is no equivalent. In XPCOM, it is the same as nsIException::result.
5.144.1.2 resultDetail (read-only)
long IVirtualBoxErrorInfo::resultDetail
Optional result data of this error. This will vary depending on the actual error usage. By
default this attribute is not being used.
5.144.1.3 interfaceID (read-only)
uuid IVirtualBoxErrorInfo::interfaceID
UUID of the interface that defined the error.
Note: In MS COM, it is the same as IErrorInfo::GetGUID, except for the data type. In
XPCOM, there is no equivalent.
5.144.1.4 component (read-only)
wstring IVirtualBoxErrorInfo::component
Name of the component that generated the error.
Note: In MS COM, it is the same as IErrorInfo::GetSource. In XPCOM, there is no
equivalent.
5.144.1.5 text (read-only)
wstring IVirtualBoxErrorInfo::text
Text description of the error.
Note: In MS COM, it is the same as IErrorInfo::GetDescription. In XPCOM, it is the
same as nsIException::message.
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5 Classes (interfaces)
5.144.1.6 next (read-only)
IVirtualBoxErrorInfo IVirtualBoxErrorInfo::next
Next error object if there is any, or null otherwise.
Note: In MS COM, there is no equivalent. In XPCOM, it is the same as nsIException::inner.
5.145 IVirtualSystemDescription
Represents one virtual system (machine) in an appliance. This interface is used in the
IAppliance::virtualSystemDescriptions[] array. After IAppliance::interpret() has been called, that
array contains information about how the virtual systems described in the OVF should best be
imported into VirtualBox virtual machines. See IAppliance for the steps required to import an
OVF into VirtualBox.
5.145.1 Attributes
5.145.1.1 count (read-only)
unsigned long IVirtualSystemDescription::count
Return the number of virtual system description entries.
5.145.2 addDescription
void IVirtualSystemDescription::addDescription(
[in] VirtualSystemDescriptionType type,
[in] wstring VBoxValue,
[in] wstring extraConfigValue)
type
VBoxValue
extraConfigValue
This method adds an additional description entry to the stack of already available descriptions for this virtual system. This is handy for writing values which aren’t directly supported by
VirtualBox. One example would be the License type of VirtualSystemDescriptionType.
5.145.3 getDescription
void IVirtualSystemDescription::getDescription(
[out] VirtualSystemDescriptionType types[],
[out] wstring refs[],
[out] wstring OVFValues[],
[out] wstring VBoxValues[],
[out] wstring extraConfigValues[])
types
refs
OVFValues
312
5 Classes (interfaces)
VBoxValues
extraConfigValues
Returns information about the virtual system as arrays of instruction items. In each array,
the items with the same indices correspond and jointly represent an import instruction for
VirtualBox.
The list below identifies the value sets that are possible depending on the VirtualSystemDescriptionType
enum value in the array item in aTypes[]. In each case, the array item with the same index in
OVFValues[] will contain the original value as contained in the OVF file (just for informational
purposes), and the corresponding item in aVBoxValues[] will contain a suggested value to be
used for VirtualBox. Depending on the description type, the aExtraConfigValues[] array item
may also be used.
• “OS”: the guest operating system type. There must be exactly one such array item on
import. The corresponding item in aVBoxValues[] contains the suggested guest operating
system for VirtualBox. This will be one of the values listed in IVirtualBox::guestOSTypes[].
The corresponding item in OVFValues[] will contain a numerical value that described the
operating system in the OVF.
• “Name”: the name to give to the new virtual machine. There can be at most one such
array item; if none is present on import, then an automatic name will be created from the
operating system type. The corresponding item im OVFValues[] will contain the suggested
virtual machine name from the OVF file, and aVBoxValues[] will contain a suggestion for
a unique VirtualBox IMachine name that does not exist yet.
• “Description”: an arbitrary description.
• “License”: the EULA section from the OVF, if present. It is the responsibility of the calling
code to display such a license for agreement; the Main API does not enforce any such policy.
• Miscellaneous: reserved for future use.
• “CPU”: the number of CPUs. There can be at most one such item, which will presently be
ignored.
• “Memory”: the amount of guest RAM, in bytes. There can be at most one such array item;
if none is present on import, then VirtualBox will set a meaningful default based on the
operating system type.
• “HardDiskControllerIDE”: an IDE hard disk controller. There can be at most two such
items. An optional value in OVFValues[] and aVBoxValues[] can be “PIIX3” or “PIIX4” to
specify the type of IDE controller; this corresponds to the ResourceSubType element which
VirtualBox writes into the OVF. The matching item in the aRefs[] array will contain an
integer that items of the “Harddisk” type can use to specify which hard disk controller a
virtual disk should be connected to. Note that in OVF, an IDE controller has two channels, corresponding to “master” and “slave” in traditional terminology, whereas the IDE
storage controller that VirtualBox supports in its virtual machines supports four channels
(primary master, primary slave, secondary master, secondary slave) and thus maps to two
IDE controllers in the OVF sense.
• “HardDiskControllerSATA”: an SATA hard disk controller. There can be at most one such
item. This has no value in OVFValues[] or aVBoxValues[]. The matching item in the
aRefs[] array will be used as with IDE controllers (see above).
• “HardDiskControllerSCSI”: a SCSI hard disk controller. There can be at most one such
item. The items in OVFValues[] and aVBoxValues[] will either be “LsiLogic”, “BusLogic” or “LsiLogicSas”. (Note that in OVF, the LsiLogicSas controller is treated as a SCSI
313
5 Classes (interfaces)
controller whereas VirtualBox considers it a class of storage controllers of its own; see
StorageControllerType). The matching item in the aRefs[] array will be used as with IDE
controllers (see above).
• “HardDiskImage”: a virtual hard disk, most probably as a reference to an image file. There
can be an arbitrary number of these items, one for each virtual disk image that accompanies
the OVF.
The array item in OVFValues[] will contain the file specification from the OVF file (without
a path since the image file should be in the same location as the OVF file itself), whereas the
item in aVBoxValues[] will contain a qualified path specification to where VirtualBox uses
the hard disk image. This means that on import the image will be copied and converted
from the “ovf” location to the “vbox” location; on export, this will be handled the other
way round.
The matching item in the aExtraConfigValues[] array must contain a string of the following format: “controller=<index>;channel=<c>“ In this string, <index> must be an
integer specifying the hard disk controller to connect the image to. That number must be
the index of an array item with one of the hard disk controller types (HardDiskControllerSCSI, HardDiskControllerSATA, HardDiskControllerIDE). In addition, <c> must specify
the channel to use on that controller. For IDE controllers, this can be 0 or 1 for master or
slave, respectively. For compatibility with VirtualBox versions before 3.2, the values 2 and
3 (for secondary master and secondary slave) are also supported, but no longer exported.
For SATA and SCSI controllers, the channel can range from 0-29.
• “CDROM”: a virtual CD-ROM drive. The matching item in aExtraConfigValue[] contains
the same attachment information as with “HardDiskImage” items.
• “CDROM”: a virtual floppy drive. The matching item in aExtraConfigValue[] contains
the same attachment information as with “HardDiskImage” items.
• “NetworkAdapter”: a network adapter. The array item in aVBoxValues[] will specify the
hardware for the network adapter, whereas the array item in aExtraConfigValues[] will
have a string of the “type=<X>“ format, where <X> must be either “NAT” or “Bridged”.
• “USBController”: a USB controller. There can be at most one such item. If, and only if,
such an item is present, USB support will be enabled for the new virtual machine.
• “SoundCard”: a sound card. There can be at most one such item. If and only if such an item
is present, sound support will be enabled for the new virtual machine. Note that the virtual
machine in VirtualBox will always be presented with the standard VirtualBox soundcard,
which may be different from the virtual soundcard expected by the appliance.
5.145.4 getDescriptionByType
void IVirtualSystemDescription::getDescriptionByType(
[in] VirtualSystemDescriptionType type,
[out] VirtualSystemDescriptionType types[],
[out] wstring refs[],
[out] wstring OVFValues[],
[out] wstring VBoxValues[],
[out] wstring extraConfigValues[])
type
types
refs
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5 Classes (interfaces)
OVFValues
VBoxValues
extraConfigValues
This is the same as getDescription() except that you can specify which types should be returned.
5.145.5 getValuesByType
wstring[] IVirtualSystemDescription::getValuesByType(
[in] VirtualSystemDescriptionType type,
[in] VirtualSystemDescriptionValueType which)
type
which
This is the same as getDescriptionByType() except that you can specify which value types should
be returned. See VirtualSystemDescriptionValueType for possible values.
5.145.6 setFinalValues
void IVirtualSystemDescription::setFinalValues(
[in] boolean enabled[],
[in] wstring VBoxValues[],
[in] wstring extraConfigValues[])
enabled
VBoxValues
extraConfigValues
This method allows the appliance’s user to change the configuration for the virtual system
descriptions. For each array item returned from getDescription(), you must pass in one boolean
value and one configuration value.
Each item in the boolean array determines whether the particular configuration item should
be enabled. You can only disable items of the types HardDiskControllerIDE, HardDiskControllerSATA, HardDiskControllerSCSI, HardDiskImage, CDROM, Floppy, NetworkAdapter, USBController and SoundCard.
For the “vbox” and “extra configuration” values, if you pass in the same arrays as returned in
the aVBoxValues and aExtraConfigValues arrays from getDescription(), the configuration remains
unchanged. Please see the documentation for getDescription() for valid configuration values for
the individual array item types. If the corresponding item in the aEnabled array is false, the
configuration value is ignored.
5.146 IWebsessionManager
Note: This interface is supported in the web service only, not in COM/XPCOM.
Websession manager. This provides essential services to webservice clients.
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5 Classes (interfaces)
5.146.1 getSessionObject
ISession IWebsessionManager::getSessionObject(
[in] IVirtualBox refIVirtualBox)
refIVirtualBox
Returns a managed object reference to the internal ISession object that was created for this
web service session when the client logged on.
See also: ISession
5.146.2 logoff
void IWebsessionManager::logoff(
[in] IVirtualBox refIVirtualBox)
refIVirtualBox
Logs off the client who has previously logged on with logon() and destroys all resources associated with the session (most importantly, all managed objects created in the server while the
session was active).
5.146.3 logon
IVirtualBox IWebsessionManager::logon(
[in] wstring username,
[in] wstring password)
username
password
Logs a new client onto the webservice and returns a managed object reference to the IVirtualBox instance, which the client can then use as a basis to further queries, since all calls to the
VirtualBox API are based on the IVirtualBox interface, in one way or the other.
316
6 Enumerations (enums)
6.1 AccessMode
Access mode for opening files.
ReadOnly
ReadWrite
6.2 AdditionsFacilityClass
Guest Additions facility classes.
None No/invalid class.
Driver Driver.
Service System service.
Program Program.
Feature Feature.
ThirdParty Third party.
All All facility classes selected.
6.3 AdditionsFacilityStatus
Guest Additions facility states.
Inactive Facility is not active.
Paused Facility has been paused.
PreInit Facility is preparing to initialize.
Init Facility is initializing.
Active Facility is up and running.
Terminating Facility is shutting down.
Terminated Facility successfully shut down.
Failed Facility failed to start.
Unknown Facility status is unknown.
317
6 Enumerations (enums)
6.4 AdditionsFacilityType
Guest Additions facility IDs.
None No/invalid facility.
VBoxGuestDriver VirtualBox base driver (VBoxGuest).
AutoLogon Auto-logon modules (VBoxGINA, VBoxCredProv, pam_vbox).
VBoxService VirtualBox system service (VBoxService).
VBoxTrayClient VirtualBox desktop integration (VBoxTray on Windows, VBoxClient on nonWindows).
Seamless Seamless guest desktop integration.
Graphics Guest graphics mode. If not enabled, seamless rendering will not work, resize hints
are not immediately acted on and guest display resizes are probably not initiated by the
guest additions.
All All facilities selected.
6.5 AdditionsRunLevelType
Guest Additions run level type.
None Guest Additions are not loaded.
System Guest drivers are loaded.
Userland Common components (such as application services) are loaded.
Desktop Per-user desktop components are loaded.
6.6 AdditionsUpdateFlag
Guest Additions update flags.
None No flag set.
WaitForUpdateStartOnly Starts the regular updating process and waits until the actual Guest
Additions update inside the guest was started. This can be necessary due to needed interaction with the guest OS during the installation phase.
6.7 AudioControllerType
Virtual audio controller type.
AC97
SB16
HDA
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6 Enumerations (enums)
6.8 AudioDriverType
Host audio driver type.
Null Null value, also means “dummy audio driver”.
WinMM Windows multimedia (Windows hosts only).
OSS Open Sound System (Linux hosts only).
ALSA Advanced Linux Sound Architecture (Linux hosts only).
DirectSound DirectSound (Windows hosts only).
CoreAudio CoreAudio (Mac hosts only).
MMPM Reserved for historical reasons.
Pulse PulseAudio (Linux hosts only).
SolAudio Solaris audio (Solaris hosts only).
6.9 AuthType
VirtualBox authentication type.
Null Null value, also means “no authentication”.
External
Guest
6.10 AutostopType
Autostop types, used with IMachine::autostopType.
Disabled Stopping the VM during system shutdown is disabled.
SaveState The state of the VM will be saved when the system shuts down.
PowerOff The VM is powered off when the system shuts down.
AcpiShutdown An ACPI shutdown event is generated.
6.11 BIOSBootMenuMode
BIOS boot menu mode.
Disabled
MenuOnly
MessageAndMenu
319
6 Enumerations (enums)
6.12 BandwidthGroupType
Type of a bandwidth control group.
Null Null type, must be first.
Disk The bandwidth group controls disk I/O.
Network The bandwidth group controls network I/O.
6.13 CPUPropertyType
Virtual CPU property type. This enumeration represents possible values of the IMachine get- and
setCPUProperty methods.
Null Null value (never used by the API).
PAE This setting determines whether VirtualBox will expose the Physical Address Extension
(PAE) feature of the host CPU to the guest. Note that in case PAE is not available, it will
not be reported.
Synthetic This setting determines whether VirtualBox will expose a synthetic CPU to the guest
to allow teleporting between host systems that differ significantly.
LongMode This setting determines whether VirtualBox will advertise long mode (i.e. 64-bit
guest support) and let the guest enter it.
TripleFaultReset This setting determines whether a triple fault within a guest will trigger an
internal error condition and stop the VM (default) or reset the virtual CPU and continue
execution.
6.14 ChipsetType
Type of emulated chipset (mostly southbridge).
Null null value. Never used by the API.
PIIX3 A PIIX3 (PCI IDE ISA Xcelerator) chipset.
ICH9 A ICH9 (I/O Controller Hub) chipset.
6.15 CleanupMode
Cleanup mode, used with IMachine::unregister().
UnregisterOnly Unregister only the machine, but neither delete snapshots nor detach media.
DetachAllReturnNone Delete all snapshots and detach all media but return none; this will keep
all media registered.
DetachAllReturnHardDisksOnly Delete all snapshots, detach all media and return hard disks
for closing, but not removable media.
Full Delete all snapshots, detach all media and return all media for closing.
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6 Enumerations (enums)
6.16 ClipboardMode
Host-Guest clipboard interchange mode.
Disabled
HostToGuest
GuestToHost
Bidirectional
6.17 CloneMode
Clone mode, used with IMachine::cloneTo().
MachineState Clone the state of the selected machine.
MachineAndChildStates Clone the state of the selected machine and its child snapshots if
present.
AllStates Clone all states (including all snapshots) of the machine, regardless of the machine
object used.
6.18 CloneOptions
Clone options, used with IMachine::cloneTo().
Link Create a clone VM where all virtual disks are linked to the original VM.
KeepAllMACs Don’t generate new MAC addresses of the attached network adapters.
KeepNATMACs Don’t generate new MAC addresses of the attached network adapters when
they are using NAT.
KeepDiskNames Don’t change the disk names.
6.19 CopyFileFlag
File copying flags.
None No flag set.
Recursive Copy directories recursively. This flag is not implemented yet.
Update Only copy when the source file is newer than the destination file or when the destination
file is missing. This flag is not implemented yet.
FollowLinks Follow symbolic links. This flag is not implemented yet.
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6 Enumerations (enums)
6.20 DataFlags
None
Mandatory
Expert
Array
FlagMask
6.21 DataType
Int32
Int8
String
6.22 DeviceActivity
Device activity for IConsole::getDeviceActivity().
Null
Idle
Reading
Writing
6.23 DeviceType
Device type.
Null Null value, may also mean “no device” (not allowed for IConsole::getDeviceActivity()).
Floppy Floppy device.
DVD CD/DVD-ROM device.
HardDisk Hard disk device.
Network Network device.
USB USB device.
SharedFolder Shared folder device.
322
6 Enumerations (enums)
6.24 DhcpOpt
SubnetMask
TimeOffset
Router
TimeServer
NameServer
DomainNameServer
LogServer
Cookie
LPRServer
ImpressServer
ResourseLocationServer
HostName
BootFileSize
MeritDumpFile
DomainName
SwapServer
RootPath
ExtensionPath
IPForwardingEnableDisable
NonLocalSourceRoutingEnableDisable
PolicyFilter
MaximumDatagramReassemblySize
DefaultIPTime2Live
PathMTUAgingTimeout
IPLayerParametersPerInterface
InterfaceMTU
AllSubnetsAreLocal
BroadcastAddress
PerformMaskDiscovery
MaskSupplier
PerformRouteDiscovery
RouterSolicitationAddress
323
6 Enumerations (enums)
StaticRoute
TrailerEncapsulation
ARPCacheTimeout
EthernetEncapsulation
TCPDefaultTTL
TCPKeepAliveInterval
TCPKeepAliveGarbage
NetworkInformationServiceDomain
NetworkInformationServiceServers
NetworkTimeProtocolServers
VendorSpecificInformation
Option_44
Option_45
Option_46
Option_47
Option_48
Option_49
IPAddressLeaseTime
Option_64
Option_65
TFTPServerName
BootfileName
Option_68
Option_69
Option_70
Option_71
Option_72
Option_73
Option_74
Option_75
Option_119
324
6 Enumerations (enums)
6.25 DirectoryCreateFlag
Directory creation flags.
None No flag set.
Parents No error if existing, make parent directories as needed.
6.26 DirectoryOpenFlag
Directory open flags.
None No flag set.
NoSymlinks Don’t allow symbolic links as part of the path.
6.27 DirectoryRemoveRecFlag
Directory recursive removement flags.
None No flag set.
ContentAndDir Delete the content of the directory and the directory itself.
ContentOnly Only delete the content of the directory, omit the directory it self.
6.28 DragAndDropAction
Possible actions within an Drag and Drop operation.
Ignore Do nothing.
Copy Copy the item to the target.
Move Move the item to the target.
Link Link the item from within the target.
6.29 DragAndDropMode
Drag’n’Drop interchange mode.
Disabled
HostToGuest
GuestToHost
Bidirectional
325
6 Enumerations (enums)
6.30 ExportOptions
Export options, used with IAppliance::write().
CreateManifest Write the optional manifest file (.mf) which is used for integrity checks prior
import.
ExportDVDImages Export DVD images. Default is not to export them as it is rarely needed for
typical VMs.
StripAllMACs Do not export any MAC address information. Default is to keep them to avoid
losing information which can cause trouble after import, at the price of risking duplicate
MAC addresses, if the import options are used to keep them.
StripAllNonNATMACs Do not export any MAC address information, except for adapters using
NAT. Default is to keep them to avoid losing information which can cause trouble after
import, at the price of risking duplicate MAC addresses, if the import options are used to
keep them.
6.31 FaultToleranceState
Used with IMachine::faultToleranceState.
Inactive No fault tolerance enabled.
Master Fault tolerant master VM.
Standby Fault tolerant standby VM.
6.32 FileSeekType
File seeking types.
Set Seek from the start of the file.
Current Seek from the current file position.
6.33 FileStatus
File statuses.
Undefined File is in an undefined state.
Opening Guest file is opening.
Open Guest file has been successfully opened.
Closing Guest file closing.
Closed Guest file has been closed.
Down Service/OS is stopping, guest file was closed.
Error Something went wrong.
326
6 Enumerations (enums)
6.34 FirmwareType
Firmware type.
BIOS BIOS Firmware.
EFI EFI Firmware, bitness detected basing on OS type.
EFI32 EFI firmware, 32-bit.
EFI64 EFI firmware, 64-bit.
EFIDUAL EFI firmware, combined 32 and 64-bit.
6.35 FramebufferPixelFormat
Format of the video memory buffer. Constants represented by this enum can be used to test for
particular values of IFramebuffer::pixelFormat.
See also www.fourcc.org for more information about FOURCC pixel formats.
Opaque Unknown buffer format (the user may not assume any particular format of the buffer).
FOURCC_RGB Basic RGB format (IFramebuffer::bitsPerPixel determines the bit layout).
6.36 FsObjType
File system object type.
Undefined Type is undefined / unknown.
FIFO Named pipe.
DevChar Character device.
DevBlock Block device.
Directory Directory.
File File.
Symlink Symlink.
Socket Socket.
Whiteout Whiteout.
6.37 GraphicsControllerType
Graphics controller type, used with IMachine::unregister().
Null Reserved value, invalid.
VBoxVGA Default VirtualBox VGA device.
VMSVGA VMware SVGA II device.
327
6 Enumerations (enums)
6.38 GuestMonitorChangedEventType
How the guest monitor has been changed.
Enabled The guest monitor has been enabled by the guest.
Disabled The guest monitor has been disabled by the guest.
NewOrigin The guest monitor origin has changed in the guest.
6.39 GuestMouseEventMode
The mode (relative, absolute, multi-touch) of a pointer event. TODO: a clear pattern seems
to be emerging that we should usually have multiple input devices active for different types of
reporting, so we should really have different event types for relative (including wheel), absolute
(not including wheel) and multi-touch events.
Relative Relative event.
Absolute Absolute event.
6.40 GuestSessionStatus
Guest session status. This enumeration represents possible values of the IGuestSession::status
attribute.
Undefined Guest session is in an undefined state.
Starting Guest session is being started.
Started Guest session has been started.
Terminating Guest session is being terminated.
Terminated Guest session terminated normally.
TimedOutKilled Guest session timed out and was killed.
TimedOutAbnormally Guest session timed out and was not killed successfully.
Down Service/OS is stopping, guest session was killed.
Error Something went wrong.
6.41 GuestSessionWaitForFlag
Guest session waiting flags. Multiple flags can be combined.
None No waiting flags specified. Do not use this.
Start Wait for the guest session being started.
Terminate Wait for the guest session being terminated.
Status Wait for the next guest session status change.
328
6 Enumerations (enums)
6.42 GuestSessionWaitResult
Guest session waiting results. Depending on the session waiting flags (for more information see
GuestSessionWaitForFlag) the waiting result can vary based on the session’s current status.
To wait for a guest session to terminate after it has been created by IGuest::createSession()
one would specify GuestSessionWaitResult_Terminate.
None No result was returned. Not being used.
Start The guest session has been started.
Terminate The guest session has been terminated.
Status The guest session has changed its status.
IGuestSession::status.
The status then can be retrieved via
Error Error while executing the process.
Timeout The waiting operation timed out. This also will happen when no event has been occurred matching the current waiting flags in a IGuestSession::waitFor() call.
WaitFlagNotSupported A waiting flag specified in the IGuestSession::waitFor() call is not supported by the guest.
6.43 GuestUserState
State a guest user has been changed to.
Unknown Unknown state. Not being used.
LoggedIn A guest user has been successfully logged into the guest OS.
Note: This property is not implemented yet!
LoggedOut A guest user has been successfully logged out of the guest OS.
Note: This property is not implemented yet!
Locked A guest user has locked its account. This might include running a password-protected
screensaver on the guest.
Note: This property is not implemented yet!
Unlocked A guest user has unlocked its account.
Note: This property is not implemented yet!
Disabled A guest user has been disabled by the guest OS.
329
6 Enumerations (enums)
Note: This property is not implemented yet!
Idle A guest user currently is not using the guest OS.
Note: Currently only available for Windows guests since Windows 2000 SP2.
Note: On Windows guests this function currently only supports reporting contiguous
idle times up to 49.7 days per user.
The event will be triggered if a guest user is not active for at least 5 seconds. This threshold
can be adjusted by either altering VBoxService’s command line on the guest to
--vminfo-user-idle-threshold <ms>
, or by setting the per-VM guest property
/VirtualBox/GuestAdd/VBoxService/--vminfo-user-idle-threshold <ms>
with the RDONLYGUEST flag on the host. In both cases VBoxService needs to be restarted
in order to get the changes applied.
InUse A guest user continued using the guest OS after being idle.
Created A guest user has been successfully created.
Note: This property is not implemented yet!
Deleted A guest user has been successfully deleted.
Note: This property is not implemented yet!
SessionChanged To guest OS has changed the session of a user.
Note: This property is not implemented yet!
CredentialsChanged To guest OS has changed the authentication credentials of a user. This
might include changed passwords and authentication types.
Note: This property is not implemented yet!
RoleChanged To guest OS has changed the role of a user permanently, e.g. granting / denying
administrative rights.
Note: This property is not implemented yet!
330
6 Enumerations (enums)
GroupAdded To guest OS has added a user to a specific user group.
Note: This property is not implemented yet!
GroupRemoved To guest OS has removed a user from a specific user group.
Note: This property is not implemented yet!
Elevated To guest OS temporarily has elevated a user to perform a certain task.
Note: This property is not implemented yet!
6.44 HWVirtExPropertyType
Hardware virtualization property type. This enumeration represents possible values for the
IMachine::getHWVirtExProperty() and IMachine::setHWVirtExProperty() methods.
Null Null value (never used by the API).
Enabled Whether hardware virtualization (VT-x/AMD-V) is enabled at all. If such extensions
are not available, they will not be used.
VPID Whether VT-x VPID is enabled. If this extension is not available, it will not be used.
NestedPaging Whether Nested Paging is enabled. If this extension is not available, it will not
be used.
UnrestrictedExecution Whether VT-x unrestricted execution is enabled. If this feature is not
available, it will not be used.
LargePages Whether large page allocation is enabled; requires nested paging and a 64-bit host.
Force Whether the VM should fail to start if hardware virtualization (VT-x/AMD-V) cannot be
used. If not set, there will be an automatic fallback to software virtualization.
6.45 HostNetworkInterfaceMediumType
Type of encapsulation. Ethernet encapsulation includes both wired and wireless Ethernet connections. See also: IHostNetworkInterface
Unknown The type of interface cannot be determined.
Ethernet Ethernet frame encapsulation.
PPP Point-to-point protocol encapsulation.
SLIP Serial line IP encapsulation.
331
6 Enumerations (enums)
6.46 HostNetworkInterfaceStatus
Current status of the interface. See also: IHostNetworkInterface
Unknown The state of interface cannot be determined.
Up The interface is fully operational.
Down The interface is not functioning.
6.47 HostNetworkInterfaceType
Network interface type.
Bridged
HostOnly
6.48 ImportOptions
Import options, used with IAppliance::importMachines().
KeepAllMACs Don’t generate new MAC addresses of the attached network adapters.
KeepNATMACs Don’t generate new MAC addresses of the attached network adapters when
they are using NAT.
6.49 KeyboardHIDType
Type of keyboard device used in a virtual machine.
None No keyboard.
PS2Keyboard PS/2 keyboard.
USBKeyboard USB keyboard.
ComboKeyboard Combined device, working as PS/2 or USB keyboard, depending on guest
behavior. Using of such device can have negative performance implications.
6.50 LockType
Used with IMachine::lockMachine().
Write Lock the machine for writing. This requests an exclusive lock, i.e. there cannot be any
other API client holding any type of lock for this VM concurrently. Remember that a VM
process counts as an API client which implicitly holds the equivalent of a shared lock during
the entire VM runtime.
Shared Request only a shared lock for remote-controlling the machine. Such a lock allows
changing certain VM settings which can be safely modified for a running VM.
VM Lock the machine for writing, and create objects necessary for running a VM in this process.
332
6 Enumerations (enums)
6.51 MachineState
Virtual machine execution state.
This enumeration represents possible values of the IMachine::state attribute.
Below is the basic virtual machine state diagram. It shows how the state changes during
virtual machine execution. The text in square braces shows a method of the IConsole interface
that performs the given state transition.
+---------[powerDown()] <- Stuck <--[failure]-+
V
|
+-> PoweredOff --+-->[powerUp()]--> Starting --+
| +-----[resume()]-----+
|
|
|
| V
|
|
Aborted -----+
+--> Running --[pause()]--> Paused
|
|
^ |
^ |
|
Saved -----------[powerUp()]--> Restoring -+
| |
| |
|
^
| |
| |
|
|
+-----------------------------------------+-|-------------------+ +
|
|
|
|
|
|
|
+-- Saving <--------[takeSnapshot()]<-------+---------------------+
|
|
|
|
|
+-------- Saving <--------[saveState()]<----------+---------------------+
|
|
|
+-------------- Stopping -------[powerDown()]<----------+---------------------+
Note that states to the right from PoweredOff, Aborted and Saved in the above diagram are
called online VM states. These states represent the virtual machine which is being executed in
a dedicated process (usually with a GUI window attached to it where you can see the activity
of the virtual machine and interact with it). There are two special pseudo-states, FirstOnline
and LastOnline, that can be used in relational expressions to detect if the given machine state is
online or not:
if (machine.GetState() >= MachineState_FirstOnline &&
machine.GetState() <= MachineState_LastOnline)
{
...the machine is being executed...
}
When the virtual machine is in one of the online VM states (that is, being executed), only a few
machine settings can be modified. Methods working with such settings contain an explicit note
about that. An attempt to change any other setting or perform a modifying operation during this
time will result in the VBOX_E_INVALID_VM_STATE error.
All online states except Running, Paused and Stuck are transitional: they represent temporary
conditions of the virtual machine that will last as long as the operation that initiated such a
condition.
The Stuck state is a special case. It means that execution of the machine has reached the “Guru
Meditation” condition. This condition indicates an internal VMM (virtual machine manager)
failure which may happen as a result of either an unhandled low-level virtual hardware exception
or one of the recompiler exceptions (such as the too-many-traps condition).
Note also that any online VM state may transit to the Aborted state. This happens if the process
that is executing the virtual machine terminates unexpectedly (for example, crashes). Other than
that, the Aborted state is equivalent to PoweredOff.
There are also a few additional state diagrams that do not deal with virtual machine execution
and therefore are shown separately. The states shown on these diagrams are called offline VM
states (this includes PoweredOff, Aborted and Saved too).
The first diagram shows what happens when a lengthy setup operation is being executed (such
as IMachine::attachDevice()).
333
6 Enumerations (enums)
+----------------------------------(same state as before the call)------+
|
|
+-> PoweredOff --+
|
|
|
|
|-> Aborted -----+-->[lengthy VM configuration call] --> SettingUp -----+
|
|
+-> Saved -------+
The next two diagrams demonstrate the process of taking a snapshot of a powered off virtual
machine, restoring the state to that as of a snapshot or deleting a snapshot, respectively.
+----------------------------------(same state as before the call)------+
|
|
+-> PoweredOff --+
|
|
+-->[takeSnapshot()] -------------------> Saving ------+
+-> Aborted -----+
+-> PoweredOff --+
|
|
|
Aborted -----+-->[restoreSnapshot()
]-------> RestoringSnapshot -+
|
|
[deleteSnapshot()
]-------> DeletingSnapshot --+
+-> Saved -------+
|
|
|
+---(Saved if restored from an online snapshot, PoweredOff otherwise)---+
Note that the Saving state is present in both the offline state group and online state group.
Currently, the only way to determine what group is assumed in a particular case is to remember
the previous machine state: if it was Running or Paused, then Saving is an online state, otherwise it is an offline state. This inconsistency may be removed in one of the future versions of
VirtualBox by adding a new state.
Null Null value (never used by the API).
PoweredOff The machine is not running and has no saved execution state; it has either never
been started or been shut down successfully.
Saved The machine is not currently running, but the execution state of the machine has been
saved to an external file when it was running, from where it can be resumed.
Teleported The machine was teleported to a different host (or process) and then powered off.
Take care when powering it on again may corrupt resources it shares with the teleportation
target (e.g. disk and network).
Aborted The process running the machine has terminated abnormally. This may indicate a
crash of the VM process in host execution context, or the VM process has been terminated
externally.
Running The machine is currently being executed.
Paused Execution of the machine has been paused.
Stuck Execution of the machine has reached the “Guru Meditation” condition. This indicates a
severe error in the hypervisor itself.
Teleporting The machine is about to be teleported to a different host or process. It is possible
to pause a machine in this state, but it will go to the TeleportingPausedVM state and it
will not be possible to resume it again unless the teleportation fails.
334
6 Enumerations (enums)
LiveSnapshotting A live snapshot is being taken. The machine is running normally, but some of
the runtime configuration options are inaccessible. Also, if paused while in this state it will
transition to Saving and it will not be resume the execution until the snapshot operation
has completed.
Starting Machine is being started after powering it on from a zero execution state.
Stopping Machine is being normally stopped powering it off, or after the guest OS has initiated
a shutdown sequence.
Saving Machine is saving its execution state to a file, or an online snapshot of the machine is
being taken.
Restoring Execution state of the machine is being restored from a file after powering it on from
the saved execution state.
TeleportingPausedVM The machine is being teleported to another host or process, but it is not
running. This is the paused variant of the state.
TeleportingIn Teleporting the machine state in from another host or process.
FaultTolerantSyncing The machine is being synced with a fault tolerant VM running elsewhere.
DeletingSnapshotOnline Like DeletingSnapshot, but the merging of media is ongoing in the
background while the machine is running.
DeletingSnapshotPaused Like DeletingSnapshotOnline, but the machine was paused when
the merging of differencing media was started.
RestoringSnapshot A machine snapshot is being restored; this typically does not take long.
DeletingSnapshot A machine snapshot is being deleted; this can take a long time since this may
require merging differencing media. This value indicates that the machine is not running
while the snapshot is being deleted.
SettingUp Lengthy setup operation is in progress.
FirstOnline Pseudo-state: first online state (for use in relational expressions).
LastOnline Pseudo-state: last online state (for use in relational expressions).
FirstTransient Pseudo-state: first transient state (for use in relational expressions).
LastTransient Pseudo-state: last transient state (for use in relational expressions).
6.52 MediumFormatCapabilities
Medium format capability flags.
Uuid Supports UUIDs as expected by VirtualBox code.
CreateFixed Supports creating fixed size images, allocating all space instantly.
CreateDynamic Supports creating dynamically growing images, allocating space on demand.
CreateSplit2G Supports creating images split in chunks of a bit less than 2 GBytes.
Differencing Supports being used as a format for differencing media (see IMedium::createDiffStorage()).
Asynchronous Supports asynchronous I/O operations for at least some configurations.
335
6 Enumerations (enums)
File The format backend operates on files (the IMedium::location attribute of the medium
specifies a file used to store medium data; for a list of supported file extensions see
IMediumFormat::describeFileExtensions()).
Properties The format backend uses the property interface to configure the storage location
and properties (the IMediumFormat::describeProperties() method is used to get access to
properties supported by the given medium format).
TcpNetworking The format backend uses the TCP networking interface for network access.
VFS The format backend supports virtual filesystem functionality.
CapabilityMask
6.53 MediumState
Virtual medium state. See also: IMedium
NotCreated Associated medium storage does not exist (either was not created yet or was
deleted).
Created Associated storage exists and accessible; this gets set if the accessibility check performed by IMedium::refreshState() was successful.
LockedRead Medium is locked for reading (see IMedium::lockRead()), no data modification is
possible.
LockedWrite Medium is locked for writing (see IMedium::lockWrite()), no concurrent data
reading or modification is possible.
Inaccessible Medium accessibility check (see IMedium::refreshState()) has not yet been
performed, or else, associated medium storage is not accessible. In the first case,
IMedium::lastAccessError is empty, in the second case, it describes the error that occurred.
Creating Associated medium storage is being created.
Deleting Associated medium storage is being deleted.
6.54 MediumType
Virtual medium type. For each IMedium, this defines how the medium is attached to a virtual
machine (see IMediumAttachment) and what happens when a snapshot (see ISnapshot) is taken
of a virtual machine which has the medium attached. At the moment DVD and floppy media are
always of type “writethrough”.
Normal Normal medium (attached directly or indirectly, preserved when taking snapshots).
Immutable Immutable medium (attached indirectly, changes are wiped out the next time the
virtual machine is started).
Writethrough Write through medium (attached directly, ignored when taking snapshots).
Shareable Allow using this medium concurrently by several machines.
Note: Present since VirtualBox 3.2.0, and accepted since 3.2.8.
336
6 Enumerations (enums)
Readonly A readonly medium, which can of course be used by several machines.
Note: Present and accepted since VirtualBox 4.0.
MultiAttach A medium which is indirectly attached, so that one base medium can be used for
several VMs which have their own differencing medium to store their modifications. In
some sense a variant of Immutable with unset AutoReset flag in each differencing medium.
Note: Present and accepted since VirtualBox 4.0.
6.55 MediumVariant
Virtual medium image variant. More than one flag may be set. See also: IMedium
Standard No particular variant requested, results in using the backend default.
VmdkSplit2G VMDK image split in chunks of less than 2GByte.
VmdkRawDisk VMDK image representing a raw disk.
VmdkStreamOptimized VMDK streamOptimized image. Special import/export format which
is read-only/append-only.
VmdkESX VMDK format variant used on ESX products.
Fixed Fixed image. Only allowed for base images.
Diff Differencing image. Only allowed for child images.
NoCreateDir Special flag which suppresses automatic creation of the subdirectory. Only used
when passing the medium variant as an input parameter.
6.56 MouseButtonState
Mouse button state.
LeftButton
RightButton
MiddleButton
WheelUp
WheelDown
XButton1
XButton2
MouseStateMask
337
6 Enumerations (enums)
6.57 NATAliasMode
AliasLog
AliasProxyOnly
AliasUseSamePorts
6.58 NATProtocol
Protocol definitions used with NAT port-forwarding rules.
UDP Port-forwarding uses UDP protocol.
TCP Port-forwarding uses TCP protocol.
6.59 NetworkAdapterPromiscModePolicy
The promiscuous mode policy of an interface.
Deny Deny promiscuous mode requests.
AllowNetwork Allow promiscuous mode, but restrict the scope it to the internal network so that
it only applies to other VMs.
AllowAll Allow promiscuous mode, include unrelated traffic going over the wire and internally
on the host.
6.60 NetworkAdapterType
Network adapter type.
Null Null value (never used by the API).
Am79C970A AMD PCNet-PCI II network card (Am79C970A).
Am79C973 AMD PCNet-FAST III network card (Am79C973).
I82540EM Intel PRO/1000 MT Desktop network card (82540EM).
I82543GC Intel PRO/1000 T Server network card (82543GC).
I82545EM Intel PRO/1000 MT Server network card (82545EM).
Virtio Virtio network device.
6.61 NetworkAttachmentType
Network attachment type.
Null Null value, also means “not attached”.
NAT
Bridged
338
6 Enumerations (enums)
Internal
HostOnly
Generic
NATNetwork
6.62 PathRenameFlag
Path renaming flags.
None No flag set.
NoReplace Do not replace anything.
Replace This will replace attempt any target which isn’t a directory.
NoSymlinks Don’t allow symbolic links as part of the path.
6.63 PointingHIDType
Type of pointing device used in a virtual machine.
None No mouse.
PS2Mouse PS/2 auxiliary device, a.k.a. mouse.
USBMouse USB mouse (relative pointer).
USBTablet USB tablet (absolute pointer). Also enables a relative USB mouse in addition.
ComboMouse Combined device, working as PS/2 or USB mouse, depending on guest behavior.
Using this device can have negative performance implications.
USBMultiTouch USB multi-touch device. Also enables the USB tablet and mouse devices.
6.64 PortMode
The PortMode enumeration represents possible communication modes for the virtual serial port
device.
Disconnected Virtual device is not attached to any real host device.
HostPipe Virtual device is attached to a host pipe.
HostDevice Virtual device is attached to a host device.
RawFile Virtual device is attached to a raw file.
339
6 Enumerations (enums)
6.65 ProcessCreateFlag
Guest process execution flags.
None No flag set.
WaitForProcessStartOnly Only use the specified timeout value to wait for starting the guest
process - the guest process itself then uses an infinite timeout.
IgnoreOrphanedProcesses Do not report an error when executed processes are still alive
when VBoxService or the guest OS is shutting down.
Hidden Do not show the started process according to the guest OS guidelines.
NoProfile Do not use the user’s profile data when exeuting a process. Only available for Windows guests.
WaitForStdOut The guest process waits until all data from stdout is read out.
WaitForStdErr The guest process waits until all data from stderr is read out.
ExpandArguments Expands environment variables in process arguments.
6.66 ProcessInputFlag
Guest process input flags.
None No flag set.
EndOfFile End of file (input) reached.
6.67 ProcessInputStatus
Process input statuses.
Undefined Undefined state.
Broken Input pipe is broken.
Available Input pipe became available for writing.
Written Data has been successfully written.
Overflow Too much input data supplied, data overflow.
6.68 ProcessOutputFlag
Guest process output flags for specifying which type of output to retrieve.
None No flags set. Get output from stdout.
StdErr Get output from stderr.
340
6 Enumerations (enums)
6.69 ProcessPriority
Process priorities.
Invalid Invalid priority, do not use.
Default Default process priority determined by the OS.
6.70 ProcessStatus
Process execution statuses.
Undefined Process is in an undefined state.
Starting Process is being started.
Started Process has been started.
Paused Process has been paused.
Terminating Process is being terminated.
TerminatedNormally Process terminated normally.
TerminatedSignal Process terminated via signal.
TerminatedAbnormally Process terminated abnormally.
TimedOutKilled Process timed out and was killed.
TimedOutAbnormally Process timed out and was not killed successfully.
Down Service/OS is stopping, process was killed.
Error Something went wrong.
6.71 ProcessWaitForFlag
Process waiting flags. Multiple flags can be combined.
None No waiting flags specified. Do not use this.
Start Wait for the process being started.
Terminate Wait for the process being terminated.
StdIn Wait for stdin becoming available.
StdOut Wait for data becoming available on stdout.
StdErr Wait for data becoming available on stderr.
341
6 Enumerations (enums)
6.72 ProcessWaitResult
Process waiting results. Depending on the process waiting flags (for more information see
ProcessWaitForFlag) the waiting result can vary based on the processes’ current status.
To wait for a guest process to terminate after it has been created by IGuestSession::processCreate()
or IGuestSession::processCreateEx() one would specify ProcessWaitResult_Terminate.
If a guest process has been started with ProcessCreateFlag_WaitForStdOut a client can wait
with ProcessWaitResult_StdOut for new data to arrive on stdout; same applies for ProcessCreateFlag_WaitForStdErr and ProcessWaitResult_StdErr.
None No result was returned. Not being used.
Start The process has been started.
Terminate The process has been terminated.
Status The process has changed its status. The status then can be retrieved via IProcess::status.
Error Error while executing the process.
Timeout The waiting operation timed out. This also will happen when no event has been occurred matching the current waiting flags in a IProcess::waitFor() call.
StdIn The process signalled that stdin became available for writing and that the process awaits
input now.
StdOut Data on stdout became available for reading.
StdErr Data on stderr became available for reading.
WaitFlagNotSupported A waiting flag specified in the IProcess::waitFor() call is not supported
by the guest.
6.73 ProcessorFeature
CPU features.
HWVirtEx
PAE
LongMode
NestedPaging
6.74 Reason
Internal event reason type.
Unspecified Null value, means “no known reason”.
HostSuspend Host is being suspended (power management event).
HostResume Host is being resumed (power management event).
HostBatteryLow Host is running low on battery (power management event).
342
6 Enumerations (enums)
6.75 Scope
Scope of the operation.
A generic enumeration used in various methods to define the action or argument scope.
Global
Machine
Session
6.76 SessionState
Session state. This enumeration represents possible values of IMachine::sessionState and
ISession::state attributes.
Null Null value (never used by the API).
Unlocked In IMachine::sessionState, this means that the machine is not locked for any sessions.
In ISession::state, this means that no machine is currently locked for this session.
Locked In IMachine::sessionState, this means that the machine is currently locked for a session,
whose process identifier can then be found in the IMachine::sessionPID attribute.
In ISession::state, this means that a machine is currently locked for this session, and
the mutable machine object can be found in the ISession::machine attribute (see
IMachine::lockMachine() for details).
Spawning A new process is being spawned for the machine as a result of IMachine::launchVMProcess()
call. This state also occurs as a short transient state during an IMachine::lockMachine()
call.
Unlocking The session is being unlocked.
6.77 SessionType
Session type. This enumeration represents possible values of the ISession::type attribute.
Null Null value (never used by the API).
WriteLock Session has acquired an exclusive write lock on a machine using IMachine::lockMachine().
Remote Session has launched a VM process using IMachine::launchVMProcess()
Shared Session has obtained a link to another session using IMachine::lockMachine()
6.78 SettingsVersion
Settings version of VirtualBox settings files. This is written to the “version” attribute of the root
“VirtualBox” element in the settings file XML and indicates which VirtualBox version wrote the
file.
Null Null value, indicates invalid version.
v1_0 Legacy settings version, not currently supported.
343
6 Enumerations (enums)
v1_1 Legacy settings version, not currently supported.
v1_2 Legacy settings version, not currently supported.
v1_3pre Legacy settings version, not currently supported.
v1_3 Settings version “1.3”, written by VirtualBox 2.0.12.
v1_4 Intermediate settings version, understood by VirtualBox 2.1.x.
v1_5 Intermediate settings version, understood by VirtualBox 2.1.x.
v1_6 Settings version “1.6”, written by VirtualBox 2.1.4 (at least).
v1_7 Settings version “1.7”, written by VirtualBox 2.2.x and 3.0.x.
v1_8 Intermediate settings version “1.8”, understood by VirtualBox 3.1.x.
v1_9 Settings version “1.9”, written by VirtualBox 3.1.x.
v1_10 Settings version “1.10”, written by VirtualBox 3.2.x.
v1_11 Settings version “1.11”, written by VirtualBox 4.0.x.
v1_12 Settings version “1.12”, written by VirtualBox 4.1.x.
v1_13 Settings version “1.13”, written by VirtualBox 4.2.x.
v1_14 Settings version “1.14”, written by VirtualBox 4.3.x.
Future Settings version greater than “1.13”, written by a future VirtualBox version.
6.79 StorageBus
The bus type of the storage controller (IDE, SATA, SCSI, SAS or Floppy); see IStorageController::bus.
Null null value. Never used by the API.
IDE
SATA
SCSI
Floppy
SAS
6.80 StorageControllerType
The exact variant of storage controller hardware presented to the guest; see IStorageController::controllerType.
Null null value. Never used by the API.
LsiLogic A SCSI controller of the LsiLogic variant.
BusLogic A SCSI controller of the BusLogic variant.
IntelAhci An Intel AHCI SATA controller; this is the only variant for SATA.
PIIX3 An IDE controller of the PIIX3 variant.
344
6 Enumerations (enums)
PIIX4 An IDE controller of the PIIX4 variant.
ICH6 An IDE controller of the ICH6 variant.
I82078 A floppy disk controller; this is the only variant for floppy drives.
LsiLogicSas A variant of the LsiLogic controller using SAS.
6.81 SymlinkReadFlag
Symbolic link reading flags.
None No flags set.
NoSymlinks Don’t allow symbolic links as part of the path.
6.82 SymlinkType
Symbolic link types.
Unknown It is not known what is being targeted.
Directory The link targets a directory.
File The link targets a file (or whatever else).
6.83 TouchContactState
Touch event contact state.
None The touch has finished.
InContact Whether the touch is really touching the device.
InRange Whether the touch is close enough to the device to be detected.
ContactStateMask
6.84 USBControllerType
The USB controller type. IUSBController::type.
Null null value. Never used by the API.
OHCI
EHCI
Last Last element (invalid). Used for parameter checks.
6.85 USBDeviceFilterAction
Actions for host USB device filters. See also: IHostUSBDeviceFilter, USBDeviceState
Null Null value (never used by the API).
Ignore Ignore the matched USB device.
Hold Hold the matched USB device.
345
6 Enumerations (enums)
6.86 USBDeviceState
USB device state. This enumeration represents all possible states of the USB device physically
attached to the host computer regarding its state on the host computer and availability to guest
computers (all currently running virtual machines).
Once a supported USB device is attached to the host, global USB filters (IHost::USBDeviceFilters[])
are activated. They can either ignore the device, or put it to USBDeviceState_Held state, or do
nothing. Unless the device is ignored by global filters, filters of all currently running guests
(IUSBDeviceFilters::deviceFilters[]) are activated that can put it to USBDeviceState_Captured
state.
If the device was ignored by global filters, or didn’t match any filters at all (including guest
ones), it is handled by the host in a normal way. In this case, the device state is determined by
the host and can be one of USBDeviceState_Unavailable, USBDeviceState_Busy or USBDeviceState_Available, depending on the current device usage.
Besides auto-capturing based on filters, the device can be manually captured by guests
(IConsole::attachUSBDevice()) if its state is USBDeviceState_Busy, USBDeviceState_Available or
USBDeviceState_Held.
Note: Due to differences in USB stack implementations in Linux and Win32, states USBDeviceState_Busy and USBDeviceState_Unavailable are applicable only to the Linux
version of the product. This also means that (IConsole::attachUSBDevice()) can only
succeed on Win32 if the device state is USBDeviceState_Held.
See also: IHostUSBDevice, IHostUSBDeviceFilter
NotSupported Not supported by the VirtualBox server, not available to guests.
Unavailable Being used by the host computer exclusively, not available to guests.
Busy Being used by the host computer, potentially available to guests.
Available Not used by the host computer, available to guests (the host computer can also start
using the device at any time).
Held Held by the VirtualBox server (ignored by the host computer), available to guests.
Captured Captured by one of the guest computers, not available to anybody else.
6.87 VBoxEventType
Type of an event. See IEvent for an introduction to VirtualBox event handling.
Invalid Invalid event, must be first.
Any Wildcard for all events. Events of this type are never delivered, and only used in
IEventSource::registerListener() call to simplify registration.
Vetoable Wildcard for all vetoable events. Events of this type are never delivered, and only used
in IEventSource::registerListener() call to simplify registration.
MachineEvent Wildcard for all machine events. Events of this type are never delivered, and
only used in IEventSource::registerListener() call to simplify registration.
SnapshotEvent Wildcard for all snapshot events. Events of this type are never delivered, and
only used in IEventSource::registerListener() call to simplify registration.
346
6 Enumerations (enums)
InputEvent Wildcard for all input device (keyboard, mouse) events. Events of this type are
never delivered, and only used in IEventSource::registerListener() call to simplify registration.
LastWildcard Last wildcard.
OnMachineStateChanged See IMachineStateChangedEvent.
OnMachineDataChanged See IMachineDataChangedEvent.
OnExtraDataChanged See IExtraDataChangedEvent.
OnExtraDataCanChange See IExtraDataCanChangeEvent.
OnMediumRegistered See IMediumRegisteredEvent.
OnMachineRegistered See IMachineRegisteredEvent.
OnSessionStateChanged See ISessionStateChangedEvent.
OnSnapshotTaken See ISnapshotTakenEvent.
OnSnapshotDeleted See ISnapshotDeletedEvent.
OnSnapshotChanged See ISnapshotChangedEvent.
OnGuestPropertyChanged See IGuestPropertyChangedEvent.
OnMousePointerShapeChanged See IMousePointerShapeChangedEvent.
OnMouseCapabilityChanged See IMouseCapabilityChangedEvent.
OnKeyboardLedsChanged See IKeyboardLedsChangedEvent.
OnStateChanged See IStateChangedEvent.
OnAdditionsStateChanged See IAdditionsStateChangedEvent.
OnNetworkAdapterChanged See INetworkAdapterChangedEvent.
OnSerialPortChanged See ISerialPortChangedEvent.
OnParallelPortChanged See IParallelPortChangedEvent.
OnStorageControllerChanged See IStorageControllerChangedEvent.
OnMediumChanged See IMediumChangedEvent.
OnVRDEServerChanged See IVRDEServerChangedEvent.
OnUSBControllerChanged See IUSBControllerChangedEvent.
OnUSBDeviceStateChanged See IUSBDeviceStateChangedEvent.
OnSharedFolderChanged See ISharedFolderChangedEvent.
OnRuntimeError See IRuntimeErrorEvent.
OnCanShowWindow See ICanShowWindowEvent.
OnShowWindow See IShowWindowEvent.
OnCPUChanged See ICPUChangedEvent.
OnVRDEServerInfoChanged See IVRDEServerInfoChangedEvent.
347
6 Enumerations (enums)
OnEventSourceChanged See IEventSourceChangedEvent.
OnCPUExecutionCapChanged See ICPUExecutionCapChangedEvent.
OnGuestKeyboard See IGuestKeyboardEvent.
OnGuestMouse See IGuestMouseEvent.
OnNATRedirect See INATRedirectEvent.
OnHostPCIDevicePlug See IHostPCIDevicePlugEvent.
OnVBoxSVCAvailabilityChanged See IVBoxSVCAvailabilityChangedEvent.
OnBandwidthGroupChanged See IBandwidthGroupChangedEvent.
OnGuestMonitorChanged See IGuestMonitorChangedEvent.
OnStorageDeviceChanged See IStorageDeviceChangedEvent.
OnClipboardModeChanged See IClipboardModeChangedEvent.
OnDragAndDropModeChanged See IDragAndDropModeChangedEvent.
OnNATNetworkChanged See INATNetworkChangedEvent.
OnNATNetworkStartStop See INATNetworkStartStopEvent.
OnNATNetworkAlter See INATNetworkAlterEvent.
OnNATNetworkCreationDeletion See INATNetworkCreationDeletionEvent.
OnNATNetworkSetting See INATNetworkSettingEvent.
OnNATNetworkPortForward See INATNetworkPortForwardEvent.
OnGuestSessionStateChanged See IGuestSessionStateChangedEvent.
OnGuestSessionRegistered See IGuestSessionRegisteredEvent.
OnGuestProcessRegistered See IGuestProcessRegisteredEvent.
OnGuestProcessStateChanged See IGuestProcessStateChangedEvent.
OnGuestProcessInputNotify See IGuestProcessInputNotifyEvent.
OnGuestProcessOutput See IGuestProcessOutputEvent.
OnGuestFileRegistered See IGuestFileRegisteredEvent.
OnGuestFileStateChanged See IGuestFileStateChangedEvent.
OnGuestFileOffsetChanged See IGuestFileOffsetChangedEvent.
OnGuestFileRead See IGuestFileReadEvent.
OnGuestFileWrite See IGuestFileWriteEvent.
OnVideoCaptureChanged See IVideoCaptureChangedEvent.
OnGuestUserStateChanged See IGuestUserStateChangedEvent.
OnGuestMultiTouch See IGuestMouseEvent.
OnHostNameResolutionConfigurationChange See IHostNameResolutionConfigurationChangeEvent.
Last Must be last event, used for iterations and structures relying on numerical event values.
348
6 Enumerations (enums)
6.88 VFSFileType
File types known by VFSExplorer.
Unknown
Fifo
DevChar
Directory
DevBlock
File
SymLink
Socket
WhiteOut
6.89 VFSType
Virtual file systems supported by VFSExplorer.
File
Cloud
S3
WebDav
6.90 VirtualSystemDescriptionType
Used with IVirtualSystemDescription to describe the type of a configuration value.
Ignore
OS
Name
Product
Vendor
Version
ProductUrl
VendorUrl
Description
License
Miscellaneous
CPU
349
6 Enumerations (enums)
Memory
HardDiskControllerIDE
HardDiskControllerSATA
HardDiskControllerSCSI
HardDiskControllerSAS
HardDiskImage
Floppy
CDROM
NetworkAdapter
USBController
SoundCard
SettingsFile Not used/implemented right now, will be added later in 4.1.x.
6.91 VirtualSystemDescriptionValueType
Used with IVirtualSystemDescription::getValuesByType() to describe the value type to fetch.
Reference
Original
Auto
ExtraConfig
350
7 Host-Guest Communication Manager
The VirtualBox Host-Guest Communication Manager (HGCM) allows a guest application or a
guest driver to call a host shared library. The following features of VirtualBox are implemented
using HGCM:
• Shared Folders
• Shared Clipboard
• Guest configuration interface
The shared library contains a so called HGCM service. The guest HGCM clients establish
connections to the service to call it. When calling a HGCM service the client supplies a function
code and a number of parameters for the function.
7.1 Virtual hardware implementation
HGCM uses the VMM virtual PCI device to exchange data between the guest and the host. The
guest always acts as an initiator of requests. A request is constructed in the guest physical
memory, which must be locked by the guest. The physical address is passed to the VMM device
using a 32 bit out edx, eax instruction. The physical memory must be allocated below 4GB by
64 bit guests.
The host parses the request header and data and queues the request for a host HGCM service.
The guest continues execution and usually waits on a HGCM event semaphore.
When the request has been processed by the HGCM service, the VMM device sets the completion flag in the request header, sets the HGCM event and raises an IRQ for the guest. The IRQ
handler signals the HGCM event semaphore and all HGCM callers check the completion flag in
the corresponding request header. If the flag is set, the request is considered completed.
7.2 Protocol specification
The HGCM protocol definitions are contained in the VBox/VBoxGuest.h
7.2.1 Request header
HGCM request structures contains a generic header (VMMDevHGCMRequestHeader):
Name
size
version
type
rc
reserved1
reserved2
flags
result
Description
Size of the entire request.
Version of the header, must be set to 0x10001.
Type of the request.
HGCM return code, which will be set by the VMM device.
A reserved field 1.
A reserved field 2.
HGCM flags, set by the VMM device.
The HGCM result code, set by the VMM device.
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7 Host-Guest Communication Manager
Note:
• All fields are 32 bit.
• Fields from size to reserved2 are a standard VMM device request header, which
is used for other interfaces as well.
The type field indicates the type of the HGCM request:
Name (decimal value)
VMMDevReq_HGCMConnect
(60)
VMMDevReq_HGCMDisconnect
(61)
VMMDevReq_HGCMCall32
(62)
VMMDevReq_HGCMCall64
(63)
VMMDevReq_HGCMCancel
(64)
Description
Connect to a HGCM service.
Disconnect from the service.
Call a HGCM function using the 32 bit interface.
Call a HGCM function using the 64 bit interface.
Cancel a HGCM request currently being processed by a host
HGCM service.
The flags field may contain:
Name (hexadecimal value)
VBOX_HGCM_REQ_DONE (0x00000001)
VBOX_HGCM_REQ_CANCELLED
(0x00000002)
Description
The request has been processed by the host
service.
This request was cancelled.
7.2.2 Connect
The connection request must be issued by the guest HGCM client before it can call the HGCM
service (VMMDevHGCMConnect):
Name
header
type
location
clientId
Description
The generic HGCM request header with type equal to
VMMDevReq_HGCMConnect (60).
The type of the service location information (32 bit).
The service location information (128 bytes).
The client identifier assigned to the connecting client by the HGCM subsystem (32
bit).
The type field tells the HGCM how to look for the requested service:
Name (hexadecimal
value)
VMMDevHGCMLoc_LocalHost
(0x1)
VMMDevHGCMLoc_LocalHost_Existing
(0x2)
Description
The requested service is a shared library located on the host and
the location information contains the library name.
The requested service is a preloaded one and the location
information contains the service name.
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7 Host-Guest Communication Manager
Note: Currently preloaded HGCM services are hard-coded in VirtualBox:
• VBoxSharedFolders
• VBoxSharedClipboard
• VBoxGuestPropSvc
• VBoxSharedOpenGL
There is no difference between both types of HGCM services, only the location mechanism is
different.
The client identifier is returned by the host and must be used in all subsequent requests by the
client.
7.2.3 Disconnect
This request disconnects the client and makes the client identifier invalid (VMMDevHGCMDisconnect):
Name
header
clientId
Description
The generic HGCM request header with type equal to
VMMDevReq_HGCMDisconnect (61).
The client identifier previously returned by the connect request (32 bit).
7.2.4 Call32 and Call64
Calls the HGCM service entry point (VMMDevHGCMCall) using 32 bit or 64 bit addresses:
Name Description
header The generic HGCM request header with type equal to either
VMMDevReq_HGCMCall32 (62) or VMMDevReq_HGCMCall64 (63).
clien- The client identifier previously returned by the connect request (32 bit).
tId
funcThe function code to be processed by the service (32 bit).
tion
cParms The number of following parameters (32 bit). This value is 0 if the function
requires no parameters.
parms An array of parameter description structures (HGCMFunctionParameter32 or
HGCMFunctionParameter64).
The 32 bit parameter description (HGCMFunctionParameter32) consists of 32 bit type field
and 8 bytes of an opaque value, so 12 bytes in total. The 64 bit variant (HGCMFunctionParameter64) consists of the type and 12 bytes of a value, so 16 bytes in total.
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7 Host-Guest Communication Manager
Type
VMMDevHGCMParmType_32bit
(1)
VMMDevHGCMParmType_64bit
(2)
VMMDevHGCMParmType_PhysAddr
(3)
VMMDevHGCMParmType_LinAddr
(4)
VMMDevHGCMParmType_LinAddr_In
(5)
VMMDevHGCMParmType_LinAddr_Out
(6)
VMMDevHGCMParmType_LinAddr_Locked
(7)
VMMDevHGCMParmType_LinAddr_Locked_In
(1)
VMMDevHGCMParmType_LinAddr_Locked_Out
(1)
Format of the value
A 32 bit value.
A 64 bit value.
A 32 bit size followed by a 32 bit or 64 bit guest physical
address.
A 32 bit size followed by a 32 bit or 64 bit guest linear address.
The buffer is used both for guest to host and for host to guest
data.
Same as VMMDevHGCMParmType_LinAddr but the buffer is
used only for host to guest data.
Same as VMMDevHGCMParmType_LinAddr but the buffer is
used only for guest to host data.
Same as VMMDevHGCMParmType_LinAddr but the buffer is
already locked by the guest.
Same as VMMDevHGCMParmType_LinAddr_In but the buffer is
already locked by the guest.
Same as VMMDevHGCMParmType_LinAddr_Out but the buffer
is already locked by the guest.
The
7.2.5 Cancel
This request cancels a call request (VMMDevHGCMCancel):
Name
header
Description
The generic HGCM request header with type equal to VMMDevReq_HGCMCancel
(64).
7.3 Guest software interface
The guest HGCM clients can call HGCM services from both drivers and applications.
7.3.1 The guest driver interface
The driver interface is implemented in the VirtualBox guest additions driver (VBoxGuest), which
works with the VMM virtual device. Drivers must use the VBox Guest Library (VBGL), which
provides an API for HGCM clients (VBox/VBoxGuestLib.h and VBox/VBoxGuest.h).
DECLVBGL(int) VbglHGCMConnect (VBGLHGCMHANDLE *pHandle, VBoxGuestHGCMConnectInfo *pData);
Connects to the service:
VBoxGuestHGCMConnectInfo data;
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7 Host-Guest Communication Manager
memset (&data, sizeof (VBoxGuestHGCMConnectInfo));
data.result
= VINF_SUCCESS;
data.Loc.type = VMMDevHGCMLoc_LocalHost_Existing;
strcpy (data.Loc.u.host.achName, "VBoxSharedFolders");
rc = VbglHGCMConnect (&handle, &data);
if (RT_SUCCESS (rc))
{
rc = data.result;
}
if (RT_SUCCESS (rc))
{
/* Get the assigned client identifier. */
ulClientID = data.u32ClientID;
}
DECLVBGL(int) VbglHGCMDisconnect (VBGLHGCMHANDLE handle, VBoxGuestHGCMDisconnectInfo *pData);
Disconnects from the service.
VBoxGuestHGCMDisconnectInfo data;
RtlZeroMemory (&data, sizeof (VBoxGuestHGCMDisconnectInfo));
data.result
= VINF_SUCCESS;
data.u32ClientID = ulClientID;
rc = VbglHGCMDisconnect (handle, &data);
DECLVBGL(int) VbglHGCMCall (VBGLHGCMHANDLE handle, VBoxGuestHGCMCallInfo *pData, uint32_t cbData);
Calls a function in the service.
typedef struct _VBoxSFRead
{
VBoxGuestHGCMCallInfo callInfo;
/** pointer, in: SHFLROOT
* Root handle of the mapping which name is queried.
*/
HGCMFunctionParameter root;
/** value64, in:
* SHFLHANDLE of object to read from.
*/
HGCMFunctionParameter handle;
/** value64, in:
* Offset to read from.
*/
HGCMFunctionParameter offset;
/** value64, in/out:
* Bytes to read/How many were read.
*/
HGCMFunctionParameter cb;
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7 Host-Guest Communication Manager
/** pointer, out:
* Buffer to place data to.
*/
HGCMFunctionParameter buffer;
} VBoxSFRead;
/** Number of parameters */
#define SHFL_CPARMS_READ (5)
...
VBoxSFRead data;
/* The call information. */
data.callInfo.result
=
data.callInfo.u32ClientID =
data.callInfo.u32Function =
data.callInfo.cParms
=
VINF_SUCCESS;
ulClientID;
SHFL_FN_READ;
SHFL_CPARMS_READ;
/*
/*
/*
/*
Will be returned by HGCM. */
Client identifier. */
The function code. */
Number of parameters. */
/* Initialize parameters. */
data.root.type
data.root.u.value32
= VMMDevHGCMParmType_32bit;
= pMap->root;
data.handle.type
data.handle.u.value64
= VMMDevHGCMParmType_64bit;
= hFile;
data.offset.type
data.offset.u.value64
= VMMDevHGCMParmType_64bit;
= offset;
data.cb.type
data.cb.u.value32
= VMMDevHGCMParmType_32bit;
= *pcbBuffer;
data.buffer.type
data.buffer.u.Pointer.size
data.buffer.u.Pointer.u.linearAddr
= VMMDevHGCMParmType_LinAddr_Out;
= *pcbBuffer;
= (uintptr_t)pBuffer;
rc = VbglHGCMCall (handle, &data.callInfo, sizeof (data));
if (RT_SUCCESS (rc))
{
rc = data.callInfo.result;
*pcbBuffer = data.cb.u.value32; /* This is returned by the HGCM service. */
}
7.3.2 Guest application interface
Applications call the VirtualBox Guest Additions driver to utilize the HGCM interface. There are
IOCTL’s which correspond to the Vbgl* functions:
• VBOXGUEST_IOCTL_HGCM_CONNECT
• VBOXGUEST_IOCTL_HGCM_DISCONNECT
• VBOXGUEST_IOCTL_HGCM_CALL
These IOCTL’s get the same input buffer as VbglHGCM* functions and the output buffer has the
same format as the input buffer. The same address can be used as the input and output buffers.
For example see the guest part of shared clipboard, which runs as an application and uses the
HGCM interface.
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7 Host-Guest Communication Manager
7.4 HGCM Service Implementation
The HGCM service is a shared library with a specific set of entry points. The library must export
the VBoxHGCMSvcLoad entry point:
extern "C" DECLCALLBACK(DECLEXPORT(int)) VBoxHGCMSvcLoad (VBOXHGCMSVCFNTABLE *ptable)
The service must check the ptable->cbSize and ptable->u32Version fields of the input
structure and fill the remaining fields with function pointers of entry points and the size of the
required client buffer size.
The HGCM service gets a dedicated thread, which calls service entry points synchronously, that
is the service will be called again only when a previous call has returned. However, the guest
calls can be processed asynchronously. The service must call a completion callback when the
operation is actually completed. The callback can be issued from another thread as well.
Service entry points are listed in the VBox/hgcmsvc.h in the VBOXHGCMSVCFNTABLE structure.
Entry
pfnUnload
pfnConnect
pfnDisconnect
pfnCall
pfnHostCall
pfnSaveState
pfnLoadState
Description
The service is being unloaded.
A client u32ClientID is connected to the service. The pvClient parameter points
to an allocated memory buffer which can be used by the service to store the client
information.
A client is being disconnected.
A guest client calls a service function. The callHandle must be used in the
VBOXHGCMSVCHELPERS::pfnCallComplete callback when the call has been
processed.
Called by the VirtualBox host components to perform functions which should be
not accessible by the guest. Usually this entry point is used by VirtualBox to
configure the service.
The VM state is being saved and the service must save relevant information using
the SSM API (VBox/ssm.h).
The VM is being restored from the saved state and the service must load the saved
information and be able to continue operations from the saved state.
357
8 RDP Web Control
The VirtualBox RDP Web Control (RDPWeb) provides remote access to a running VM. RDPWeb is
a RDP (Remote Desktop Protocol) client based on Flash technology and can be used from a Web
browser with a Flash plugin.
8.1 RDPWeb features
RDPWeb is embedded into a Web page and can connect to VRDP server in order to displays the
VM screen and pass keyboard and mouse events to the VM.
8.2 RDPWeb reference
RDPWeb consists of two required components:
• Flash movie RDPClientUI.swf
• JavaScript helpers webclient.js
The VirtualBox SDK contains sample HTML code including:
• JavaScript library for embedding Flash content SWFObject.js
• Sample HTML page webclient3.html
8.2.1 RDPWeb functions
RDPClientUI.swf and webclient.js work with each other. JavaScript code is responsible for
a proper SWF initialization, delivering mouse events to the SWF and processing resize requests
from the SWF. On the other hand, the SWF contains a few JavaScript callable methods, which
are used both from webclient.js and the user HTML page.
8.2.1.1 JavaScript functions
webclient.js contains helper functions. In the following table ElementId refers to an HTML
element name or attribute, and Element to the HTML element itself. HTML code
<div id=“FlashRDP”>
</div>
would have ElementId equal to FlashRDP and Element equal to the div element.
• RDPWebClient.embedSWF(SWFFileName, ElementId)
Uses SWFObject library to replace the HTML element with the Flash movie.
• RDPWebClient.isRDPWebControlById(ElementId)
Returns true if the given id refers to a RDPWeb Flash element.
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8 RDP Web Control
• RDPWebClient.isRDPWebControlByElement(Element)
Returns true if the given element is a RDPWeb Flash element.
• RDPWebClient.getFlashById(ElementId)
Returns an element, which is referenced by the given id. This function will try to resolve
any element, event if it is not a Flash movie.
8.2.1.2 Flash methods callable from JavaScript
RDPWebClienUI.swf methods can be called directly from JavaScript code on a HTML page.
• getProperty(Name)
• setProperty(Name)
• connect()
• disconnect()
• keyboardSendCAD()
8.2.1.3 Flash JavaScript callbacks
RDPWebClienUI.swf calls JavaScript functions provided by the HTML page.
8.2.2 Embedding RDPWeb in an HTML page
It is necessary to include webclient.js helper script. If SWFObject library is used, the
swfobject.js must be also included and RDPWeb flash content can be embedded to a Web
page using dynamic HTML. The HTML must include a “placeholder”, which consists of 2 div
elements.
8.3 RDPWeb change log
8.3.1 Version 1.2.28
• keyboardLayout, keyboardLayouts, UUID properties.
• Support for German keyboard layout on the client.
• Rebranding to Oracle.
8.3.2 Version 1.1.26
• webclient.js is a part of the distribution package.
• lastError property.
• keyboardSendScancodes and keyboardSendCAD methods.
8.3.3 Version 1.0.24
• Initial release.
359
9 VirtualBox external authentication
modules
VirtualBox supports arbitrary external modules to perform authentication. The module is
used when the authentication method is set to “external” for a particular VM VRDE access
and the library was specified with VBoxManage setproperty vrdeauthlibrary. Web service also use the authentication module which was specified with VBoxManage setproperty
websrvauthlibrary.
This library will be loaded by the VM or web service process on demand, i.e. when the first
remote desktop connection is made by a client or when a client that wants to use the web service
logs on.
External authentication is the most flexible as the external handler can both choose to grant
access to everyone (like the “null” authentication method would) and delegate the request to
the guest authentication component. When delegating the request to the guest component, the
handler will still be called afterwards with the option to override the result.
An authentication library is required to implement exactly one entry point:
#include "VBoxAuth.h"
/**
* Authentication library entry point.
*
* Parameters:
*
szCaller
The name of the component which calls the library (UTF8).
*
pUuid
Pointer to the UUID of the accessed virtual machine. Can be NULL.
*
guestJudgement
Result of the guest authentication.
*
szUser
User name passed in by the client (UTF8).
*
szPassword
Password passed in by the client (UTF8).
*
szDomain
Domain passed in by the client (UTF8).
*
fLogon
Boolean flag. Indicates whether the entry point is called
*
for a client logon or the client disconnect.
*
clientId
Server side unique identifier of the client.
*
*
* Return code:
*
AuthResultAccessDenied
Client access has been denied.
*
AuthResultAccessGranted
Client has the right to use the
*
virtual machine.
*
AuthResultDelegateToGuest Guest operating system must
*
authenticate the client and the
*
library must be called again with
*
the result of the guest
*
authentication.
*
*
* Note: When ’fLogon’ is 0, only pszCaller, pUuid and clientId are valid and the return
code is ignored.
*
*/
AuthResult AUTHCALL AuthEntry(
const char *szCaller,
PAUTHUUID pUuid,
AuthGuestJudgement guestJudgement,
const char *szUser,
const char *szPassword
const char *szDomain
int fLogon,
360
9 VirtualBox external authentication modules
unsigned clientId)
{
/* Process request against your authentication source of choice. */
// if (authSucceeded(...))
//
return AuthResultAccessGranted;
return AuthResultAccessDenied;
}
A note regarding the UUID implementation of the pUuid argument: VirtualBox uses a consistent binary representation of UUIDs on all platforms. For this reason the integer fields comprising
the UUID are stored as little endian values. If you want to pass such UUIDs to code which assumes that the integer fields are big endian (often also called network byte order), you need to
adjust the contents of the UUID to e.g. achieve the same string representation. The required
changes are:
• reverse the order of byte 0, 1, 2 and 3
• reverse the order of byte 4 and 5
• reverse the order of byte 6 and 7.
Using this conversion you will get identical results when converting the binary UUID to the string
representation.
The guestJudgement argument contains information about the guest authentication status.
For the first call, it is always set to AuthGuestNotAsked. In case the AuthEntry function returns
AuthResultDelegateToGuest, a guest authentication will be attempted and another call to the
AuthEntry is made with its result. This can be either granted / denied or no judgement (the
guest component chose for whatever reason to not make a decision). In case there is a problem
with the guest authentication module (e.g. the Additions are not installed or not running or the
guest did not respond within a timeout), the “not reacted” status will be returned.
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10 Using Java API
10.1 Introduction
VirtualBox can be controlled by a Java API, both locally (COM/XPCOM) and from remote (SOAP)
clients. As with the Python bindings, a generic glue layer tries to hide all platform differences,
allowing for source and binary compatibility on different platforms.
10.2 Requirements
To use the Java bindings, there are certain requirements depending on the platform. First of all,
you need JDK 1.5 (Java 5) or later. Also please make sure that the version of the VirtualBox API
.jar file exactly matches the version of VirtualBox you use. To avoid confusion, the VirtualBox API
provides versioning in the Java package name, e.g. the package is named org.virtualbox_3_2
for VirtualBox version 3.2.
• XPCOM: - for all platforms, but Microsoft Windows. A Java bridge based on JavaXPCOM is
shipped with VirtualBox. The classpath must contain vboxjxpcom.jar and the vbox.home
property must be set to location where the VirtualBox binaries are. Please make sure that
the JVM bitness matches bitness of VirtualBox you use as the XPCOM bridge relies on native
libraries.
Start your application like this:
java -cp vboxjxpcom.jar -Dvbox.home=/opt/virtualbox MyProgram
• COM: - for Microsoft Windows.
We rely on Jacob - a generic Java to COM
bridge - which has to be installed seperately.
See http://sourceforge.net/
projects/jacob-project/ for installation instructions. Also, the VirtualBox provided
vboxjmscom.jar must be in the class path.
Start your application like this:
java -cp vboxjmscom.jar;c:\jacob\jacob.jar -Djava.library.path=c:\jacob MyProgram
• SOAP - all platforms. Java 6 is required, as it comes with builtin support for SOAP via the
JAX-WS library. Also, the VirtualBox provided vbojws.jar must be in the class path. In
the SOAP case it’s possible to create several VirtualBoxManager instances to communicate
with multiple VirtualBox hosts.
Start your application like this:
java -cp vboxjws.jar MyProgram
Exception handling is also generalized by the generic glue layer, so that all methods could
throw VBoxException containing human-readable text message (see getMessage() method)
along with wrapped original exception (see getWrapped() method).
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10 Using Java API
10.3 Example
This example shows a simple use case of the Java API. Differences for SOAP vs. local version
are minimal, and limited to the connection setup phase (see ws variable). In the SOAP case it’s
possible to create several VirtualBoxManager instances to communicate with multiple VirtualBox
hosts.
import org.virtualbox_4_3.*;
....
VirtualBoxManager mgr = VirtualBoxManager.createInstance(null);
boolean ws = false; // or true, if we need the SOAP version
if (ws)
String url = “http://myhost:18034”;
String user = “test”;
String passwd = “test”;
mgr.connect(url, user, passwd);
IVirtualBox vbox = mgr.getVBox();
System.out.println(“VirtualBox version: “ + vbox.getVersion() + “\n”);
// get first VM name
String m = vbox.getMachines().get(0).getName();
System.out.println(“\nAttempting to start VM ’“ + m + “’“);
// start it
mgr.startVm(m, null, 7000);
if (ws)
mgr.disconnect();
mgr.cleanup();
For more a complete example, see TestVBox.java, shipped with the SDK. It contains exception handling and error printing code, which is important for reliable larger scale projects.
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11 License information
The sample code files shipped with the SDK are generally licensed liberally to make it easy for
anyone to use this code for their own application code.
The Java files under bindings/webservice/java/jax-ws/ (library files for the objectoriented web service) are, by contrast, licensed under the GNU Lesser General Public License
(LGPL) V2.1.
See sdk/bindings/webservice/java/jax-ws/src/COPYING.LIB for the full text of the
LGPL 2.1.
When in doubt, please refer to the individual source code files shipped with this SDK.
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12 Main API change log
Generally, VirtualBox will maintain API compatibility within a major release; a major release
occurs when the first or the second of the three version components of VirtualBox change (that
is, in the x.y.z scheme, a major release is one where x or y change, but not when only z changes).
In other words, updates like those from 2.0.0 to 2.0.2 will not come with API breakages.
Migration between major releases most likely will lead to API breakage, so please make sure
you updated code accordingly. The OOWS Java wrappers enforce that mechanism by putting
VirtualBox classes into version-specific packages such as org.virtualbox_2_2. This approach
allows for connecting to multiple VirtualBox versions simultaneously from the same Java application.
The following sections list incompatible changes that the Main API underwent since the original release of this SDK Reference with VirtualBox 2.0. A change is deemed “incompatible” only
if it breaks existing client code (e.g. changes in method parameter lists, renamed or removed
interfaces and similar). In other words, the list does not contain new interfaces, methods or
attributes or other changes that do not affect existing client code.
12.1 Incompatible API changes with version 4.3
• The explicit medium locking methods IMedium::lockRead() and IMedium::lockWrite()
have been redesigned. They return a lock token object reference now, and calling the
IToken::abandon() method (or letting the reference count to this object drop to 0) will
unlock it. This eliminates the rather common problem that an API client crash left behind
locks, and also improves the safety (API clients can’t release locks they didn’t obtain).
• The parameter list of IAppliance::write() has been changed slightly, to allow multiple flags
to be passed.
• IMachine::delete has been renamed to IMachine::deleteConfig(), to improve API client
binding compatibility.
• IMachine::export has been renamed to IMachine::exportTo(), to improve API client
binding compatibility.
• For IMachine::launchVMProcess() the meaning of the type parameter has changed slightly.
Empty string now means that the per-VM or global default frontend is launched. Most
callers of this method should use the empty string now, unless they really want to override
the default and launch a particular frontend.
• Medium management APIs were changed as follows:
– The type of attribute IMedium::variant() changed from unsigned long to
safe-array MediumVariant. It is an array of flags instead of a set of flags which
were stored inside one variable.
– The parameter list for IMedium::cloneTo() was modified. The type of parameter variant was changed from unsigned long to safe-array MediumVariant.
– The parameter list for IMedium::createBaseStorage() was modified. The type of parameter variant was changed from unsigned long to safe-array MediumVariant.
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– The parameter list for IMedium::createDiffStorage() was modified. The type of parameter variant was changed from unsigned long to safe-array MediumVariant.
– The parameter list for IMedium::cloneToBase() was modified. The type of parameter
variant was changed from unsigned long to safe-array MediumVariant.
• The type of attribute IMediumFormat::capabilities() changed from unsigned long to
safe-array MediumFormatCapabilities. It is an array of flags instead of a set of flags
which were stored inside one variable.
• The attribute IMedium::logicalSize() now returns the logical size of exactly this medium
object (whether it is a base or diff image). The old behavior was no longer acceptable, as
each image can have a different capacity.
• Guest control APIs - such as IGuest, IGuestSession, IGuestProcess and so on - now emit
own events to provide clients much finer control and the ability to write own frontends for
guest operations. The event IGuestSessionEvent acts as an abstract base class for all guest
control events. Certain guest events contain a IVirtualBoxErrorInfo member to provide
more information in case of an error happened on the guest side.
• Guest control sessions on the guest started by IGuest::createSession() now are dedicated
guest processes to provide more safety and performance for certain operations. Also, the
IGuest::createSession() call does not wait for the guest session being created anymore due
to the dedicated guest session processes just mentioned. This also will enable webservice
clients to handle guest session creation more gracefully. To wait for a guest session being
started, use the newly added attribute IGuestSession::status() to query the current guest
session status.
• The IGuestFile APIs are now implemented to provide native guest file access from the host.
• The parameter list for IMedium::updateGuestAdditions() was modified. It now supports
specifying optional command line arguments for the Guest Additions installer performing
the actual update on the guest.
• A new event IGuestUserStateChangedEvent was introduced to provide guest user status
updates to the host via event listeners. To use this event there needs to be at least the 4.3
Guest Additions installed on the guest. At the moment only the states “Idle” and “InUse”
of the GuestUserState enum are supported on Windows guests, starting at Windows 2000
SP2.
• The attribute IGuestSession::protocolVersion was added to provide a convenient way to
lookup the guest session’s protocol version it uses to communicate with the installed Guest
Additions on the guest. Older Guest Additions will set the protocol version to 1, whereas
Guest Additions 4.3 will set the protocol version to 2. This might change in the future as
new features arise.
• IDisplay::getScreenResolution has been extended to return the display position in
the guest.
• The IUSBController class is not a singleton of IMachine anymore but IMachine contains
a list of USB controllers present in the VM. The USB device filter handling was moved to
IUSBDeviceFilters.
12.2 Incompatible API changes with version 4.2
• Guest control APIs for executing guest processes, working with guest files or directories
have been moved to the newly introduced IGuestSession interface which can be created by
calling IGuest::createSession().
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A guest session will act as a guest user’s impersonation so that the guest credentials only
have to be provided when creating a new guest session. There can be up to 32 guest
sessions at once per VM, each session serving up to 2048 guest processes running or files
opened.
Instead of working with process or directory handles before version 4.2, there now are
the dedicated interfaces IGuestProcess, IGuestDirectory and IGuestFile. To retrieve more
information of a file system object the new interface IGuestFsObjInfo has been introduced.
Even though the guest control API was changed it is backwards compatible so that it can be
used with older installed Guest Additions. However, to use upcoming features like process
termination or waiting for input / output new Guest Additions must be installed when
these features got implemented.
The following limitations apply:
– The IGuestFile interface is not fully implemented yet.
– The symbolic link APIs IGuestSession::symlinkCreate(), IGuestSession::symlinkExists(),
IGuestSession::symlinkRead(), IGuestSession::symlinkRemoveDirectory() and IGuestSession::symlinkRemo
are not implemented yet.
– The directory APIs IGuestSession::directoryRemove(), IGuestSession::directoryRemoveRecursive(),
IGuestSession::directoryRename() and IGuestSession::directorySetACL() are not implemented yet.
– The temporary file creation API IGuestSession::fileCreateTemp() is not implemented
yet.
– Guest process termination via IProcess::terminate() is not implemented yet.
– Waiting for guest process output via ProcessWaitForFlag::StdOut and ProcessWaitForFlag::StdErr
is not implemented yet.
To wait for process output, IProcess::read() with appropriate flags still can
be used to periodically check for new output data to arrive.
Note that
ProcessCreateFlag::WaitForStdOut and / or ProcessCreateFlag::WaitForStdErr need
to be specified when creating a guest process via IGuestSession::processCreate() or
IGuestSession::processCreateEx().
– ACL (Access Control List) handling in general is not implemented yet.
• The LockType enumeration now has an additional value VM which tells IMachine::lockMachine()
to create a full-blown object structure for running a VM. This was the previous behavior
with Write, which now only creates the minimal object structure to save time and resources (at the moment the Console object is still created, but all sub-objects such as
Display, Keyboard, Mouse, Guest are not.
• Machines can be put in groups (actually an array of groups). The primary group affects the default placement of files belonging to a VM. IVirtualBox::createMachine() and
IVirtualBox::composeMachineFilename() have been adjusted accordingly, the former taking an array of groups as an additional parameter and the latter taking a group as an additional parameter. The create option handling has been changed for those two methods,
too.
• The method IVirtualBox::findMedium() has been removed, since it provides a subset of the
functionality of IVirtualBox::openMedium().
• The use of acronyms in API enumeration, interface, attribute and method names has been
made much more consistent, previously they sometimes were lowercase and sometimes
mixed case. They are now consistently all caps:
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Old name
PointingHidType
KeyboardHidType
IPciAddress
IPciDeviceAttachment
IMachine::pointingHidType
IMachine::keyboardHidType
IMachine::hpetEnabled
IMachine::sessionPid
IMachine::ioCacheEnabled
IMachine::ioCacheSize
IMachine::pciDeviceAssignments
IMachine::attachHostPciDevice()
IMachine::detachHostPciDevice()
IConsole::attachedPciDevices
IHostNetworkInterface::dhcpEnabled
IHostNetworkInterface::enableStaticIpConfig()
IHostNetworkInterface::enableStaticIpConfigV6()
IHostNetworkInterface::enableDynamicIpConfig()
IHostNetworkInterface::dhcpRediscover()
IHost::Acceleration3DAvailable
IGuestOSType::recommendedPae
IGuestOSType::recommendedDvdStorageController
IGuestOSType::recommendedDvdStorageBus
IGuestOSType::recommendedHdStorageController
IGuestOSType::recommendedHdStorageBus
IGuestOSType::recommendedUsbHid
IGuestOSType::recommendedHpet
IGuestOSType::recommendedUsbTablet
IGuestOSType::recommendedRtcUseUtc
IGuestOSType::recommendedUsb
INetworkAdapter::natDriver
IUSBController::enabledEhci
INATEngine::tftpPrefix
INATEngine::tftpBootFile
INATEngine::tftpNextServer
INATEngine::dnsPassDomain
INATEngine::dnsProxy
INATEngine::dnsUseHostResolver
VBoxEventType::OnHostPciDevicePlug
ICPUChangedEvent::cpu
INATRedirectEvent::hostIp
INATRedirectEvent::guestIp
IHostPciDevicePlugEvent
New name
PointingHIDType
KeyboardHIDType
IPCIAddress
IPCIDeviceAttachment
IMachine::pointingHIDType
IMachine::keyboardHIDType
IMachine::HPETEnabled
IMachine::sessionPID
IMachine::IOCacheEnabled
IMachine::IOCacheSize
IMachine::PCIDeviceAssignments
IMachine::attachHostPCIDevice
IMachine::detachHostPCIDevice()
IConsole::attachedPCIDevices
IHostNetworkInterface::DHCPEnabled
IHostNetworkInterface::enableStaticIPConfig()
IHostNetworkInterface::enableStaticIPConfigV6()
IHostNetworkInterface::enableDynamicIPConfig()
IHostNetworkInterface::DHCPRediscover()
IHost::acceleration3DAvailable
IGuestOSType::recommendedPAE
IGuestOSType::recommendedDVDStorageController
IGuestOSType::recommendedDVDStorageBus
IGuestOSType::recommendedHDStorageController
IGuestOSType::recommendedHDStorageBus
IGuestOSType::recommendedUSBHID
IGuestOSType::recommendedHPET
IGuestOSType::recommendedUSBTablet
IGuestOSType::recommendedRTCUseUTC
IGuestOSType::recommendedUSB
INetworkAdapter::NATEngine
IUSBController::enabledEHCI”
INATEngine::TFTPPrefix
INATEngine::TFTPBootFile
INATEngine::TFTPNextServer
INATEngine::DNSPassDomain
INATEngine::DNSProxy
INATEngine::DNSUseHostResolver
VBoxEventType::OnHostPCIDevicePlug
ICPUChangedEvent::CPU
INATRedirectEvent::hostIP
INATRedirectEvent::guestIP
IHostPCIDevicePlugEvent
12.3 Incompatible API changes with version 4.1
• The method IAppliance::importMachines() has one more parameter now, which allows to
configure the import process in more detail.
• The method IVirtualBox::openMedium() has one more parameter now, which allows resolving duplicate medium UUIDs without the need for external tools.
• The INetworkAdapter interface has been cleaned up. The various methods to activate an
attachment type have been replaced by the INetworkAdapter::attachmentType setter.
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Additionally each attachment mode now has its own attribute, which means that host only
networks no longer share the settings with bridged interfaces.
To allow introducing new network attachment implementations without making API
changes, the concept of a generic network attachment driver has been introduced, which
is configurable through key/value properties.
• This version introduces the guest facilities concept. A guest facility either represents a module or feature the guest is running or offering, which is defined by AdditionsFacilityType.
Each facility is member of a AdditionsFacilityClass and has a current status indicated by
AdditionsFacilityStatus, together with a timestamp (in ms) of the last status update.
To address the above concept, the following changes were made:
– In the IGuest interface, the following were removed:
∗ the supportsSeamless attribute;
∗ the supportsGraphics attribute;
– The function IGuest::getFacilityStatus() was added. It quickly provides a facility’s
status without the need to get the facility collection with IGuest::facilities.
– The attribute IGuest::facilities was added to provide an easy to access collection of
all currently known guest facilities, that is, it contains all facilies where at least one
status update was made since the guest was started.
– The interface IAdditionsFacility was added to represent a single facility returned by
IGuest::facilities.
– AdditionsFacilityStatus was added to represent a facility’s overall status.
– AdditionsFacilityType and AdditionsFacilityClass were added to represent the facility’s
type and class.
12.4 Incompatible API changes with version 4.0
• A new Java glue layer replacing the previous OOWS JAX-WS bindings was introduced. The new library allows for uniform code targeting both local (COM/XPCOM)
and remote (SOAP) transports. Now, instead of IWebsessionManager, the new class
VirtualBoxManager must be used. See Java API chapter for details.
• The confusingly named and impractical session APIs were changed. In existing client code,
the following changes need to be made:
– Replace any IVirtualBox::openSession(uuidMachine, ...) API call with the
machine’s IMachine::lockMachine() call and a LockType.Write argument. The functionality is unchanged, but instead of “opening a direct session on a machine” all
documentation now refers to “obtaining a write lock on a machine for the client session”.
– Similarly, replace any IVirtualBox::openExistingSession(uuidMachine, ...)
call with the machine’s IMachine::lockMachine() call and a LockType.Shared argument. Whereas it was previously impossible to connect a client session to a running VM process in a race-free manner, the new API will atomically either writelock the machine for the current session or establish a remote link to an existing session. Existing client code which tried calling both openSession() and
openExistingSession() can now use this one call instead.
– Third, replace any IVirtualBox::openRemoteSession(uuidMachine, ...) call
with the machine’s IMachine::launchVMProcess() call. The functionality is unchanged.
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– The SessionState enum was adjusted accordingly: “Open” is now “Locked”, “Closed”
is now “Unlocked”, “Closing” is now “Unlocking”.
• Virtual machines created with VirtualBox 4.0 or later no longer register their media in the
global media registry in the VirtualBox.xml file. Instead, such machines list all their
media in their own machine XML files. As a result, a number of media-related APIs had to
be modified again.
– Neither IVirtualBox::createHardDisk() nor IVirtualBox::openMedium() register media
automatically any more.
– IMachine::attachDevice() and IMachine::mountMedium() now take an IMedium object instead of a UUID as an argument. It is these two calls which add media to a
registry now (either a machine registry for machines created with VirtualBox 4.0 or
later or the global registry otherwise). As a consequence, if a medium is opened but
never attached to a machine, it is no longer added to any registry any more.
– To reduce code duplication, the APIs IVirtualBox::findHardDisk(), getHardDisk(), findDVDImage(), getDVDImage(), findFloppyImage() and getFloppyImage() have all been merged into IVirtualBox::findMedium(), and IVirtualBox::openHardDisk(), openDVDImage() and openFloppyImage() have all been
merged into IVirtualBox::openMedium().
– The rare use case of changing the UUID and parent UUID of a medium previously
handled by openHardDisk() is now in a separate IMedium::setIDs method.
– ISystemProperties::get/setDefaultHardDiskFolder() have been removed
since disk images are now by default placed in each machine’s folder.
– The ISystemProperties::infoVDSize attribute replaces the getMaxVDISize() API call;
this now uses bytes instead of megabytes.
• Machine management APIs were enhanced as follows:
– IVirtualBox::createMachine() is no longer restricted to creating machines in the default “Machines” folder, but can now create machines at arbitrary locations. For this
to work, the parameter list had to be changed.
– The long-deprecated IVirtualBox::createLegacyMachine() API has been removed.
– To reduce code duplication and for consistency with the aforementioned media APIs,
IVirtualBox::getMachine() has been merged with IVirtualBox::findMachine(),
and IMachine::getSnapshot() has been merged with IMachine::findSnapshot().
– IVirtualBox::unregisterMachine() was replaced with IMachine::unregister()
with additional functionality for cleaning up machine files.
– IMachine::deleteSettings has been replaced by IMachine::delete, which allows
specifying which disk images are to be deleted as part of the deletion, and because it
can take a while it also returns a IProgress object reference, so that the completion
of the asynchronous activities can be monitored.
– IConsole::forgetSavedState has been renamed to IConsole::discardSavedState().
• All event callbacks APIs were replaced with a new, generic event mechanism that can be
used both locally (COM, XPCOM) and remotely (web services). Also, the new mechanism
is usable from scripting languages and a local Java. See events for details. The new concept
will require changes to all clients that used event callbacks.
• additionsActive() was replaced with additionsRunLevel() and getAdditionsStatus() in
order to support a more detailed status of the current Guest Additions loading/readiness
state. IGuest::additionsVersion() no longer returns the Guest Additions interface version
but the installed Guest Additions version and revision in form of 3.3.0r12345.
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• To address shared folders auto-mounting support, the following APIs were extended to
require an additional automount parameter:
– IVirtualBox::createSharedFolder()
– IMachine::createSharedFolder()
– IConsole::createSharedFolder()
Also, a new property named autoMount was added to the ISharedFolder interface.
• The appliance (OVF) APIs were enhanced as follows:
– IMachine::export received an extra parameter location, which is used to decide
for the disk naming.
– IAppliance::write() received an extra parameter manifest, which can suppress creating the manifest file on export.
– IVFSExplorer::entryList() received two extra parameters sizes and modes, which
contains the sizes (in bytes) and the file access modes (in octal form) of the returned
files.
• Support for remote desktop access to virtual machines has been cleaned up to allow third
party implementations of the remote desktop server. This is called the VirtualBox Remote
Desktop Extension (VRDE) and can be added to VirtualBox by installing the corresponding
extension package; see the VirtualBox User Manual for details.
The following API changes were made to support the VRDE interface:
– IVRDPServer has been renamed to IVRDEServer.
– IRemoteDisplayInfo has been renamed to IVRDEServerInfo.
– IMachine::VRDEServer replaces VRDPServer.
– IConsole::VRDEServerInfo replaces RemoteDisplayInfo.
– ISystemProperties::VRDEAuthLibrary replaces RemoteDisplayAuthLibrary.
– The following methods have been implemented in IVRDEServer to support generic
VRDE properties:
∗ IVRDEServer::setVRDEProperty
∗ IVRDEServer::getVRDEProperty
∗ IVRDEServer::VRDEProperties
A few implementation-specific attributes of the old IVRDPServer interface have been
removed and replaced with properties:
∗ IVRDPServer::Ports has been replaced with the "TCP/Ports" property. The
property value is a string, which contains a comma-separated list of ports or
ranges of ports. Use a dash between two port numbers to specify a range. Example: "5000,5010-5012"
∗ IVRDPServer::NetAddress has been replaced with the "TCP/Address" property. The property value is an IP address string. Example: "127.0.0.1"
∗ IVRDPServer::VideoChannel has been replaced with the "VideoChannel/Enabled"
property. The property value is either "true" or "false"
∗ IVRDPServer::VideoChannelQuality has been replaced with the "VideoChannel/Quality"
property. The property value is a string which contain a decimal number in range
10..100. Invalid values are ignored and the quality is set to the default value 75.
Example: "50"
• The VirtualBox external authentication module interface has been updated and made more
generic. Because of that, VRDPAuthType enumeration has been renamed to AuthType.
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12.5 Incompatible API changes with version 3.2
• The following interfaces were renamed for consistency:
– IMachine::getCpuProperty() is now IMachine::getCPUProperty();
– IMachine::setCpuProperty() is now IMachine::setCPUProperty();
– IMachine::getCpuIdLeaf() is now IMachine::getCPUIDLeaf();
– IMachine::setCpuIdLeaf() is now IMachine::setCPUIDLeaf();
– IMachine::removeCpuIdLeaf() is now IMachine::removeCPUIDLeaf();
– IMachine::removeAllCpuIdLeafs() is now IMachine::removeAllCPUIDLeaves();
– the CpuPropertyType enum is now CPUPropertyType.
– IVirtualBoxCallback::onSnapshotDiscarded() is now IVirtualBoxCallback::onSnapshotDeleted.
• When creating a VM configuration with IVirtualBox::createMachine) it is now possible to
ignore existing configuration files which would previously have caused a failure. For this
the override parameter was added.
• Deleting snapshots via IConsole::deleteSnapshot() is now possible while the associated VM
is running in almost all cases. The API is unchanged, but client code that verifies machine
states to determine whether snapshots can be deleted may need to be adjusted.
• The IoBackendType enumeration was replaced with a boolean flag (see IStorageController::useHostIOCache).
• To address multi-monitor support, the following APIs were extended to require an additional screenId parameter:
– IMachine::querySavedThumbnailSize()
– IMachine::readSavedThumbnailToArray()
– IMachine::querySavedScreenshotPNGSize()
– IMachine::readSavedScreenshotPNGToArray()
• The shape parameter of IConsoleCallback::onMousePointerShapeChange was changed
from a implementation-specific pointer to a safearray, enabling scripting languages to process pointer shapes.
12.6 Incompatible API changes with version 3.1
• Due to the new flexibility in medium attachments that was introduced with version 3.1
(in particular, full flexibility with attaching CD/DVD drives to arbitrary controllers), we
seized the opportunity to rework all interfaces dealing with storage media to make the API
more flexible as well as logical. The IStorageController, IMedium, IMediumAttachment
and, IMachine interfaces were affected the most. Existing code using them to configure
storage and media needs to be carefully checked.
All media (hard disks, floppies and CDs/DVDs) are now uniformly handled through
the IMedium interface.
The device-specific interfaces (IHardDisk, IDVDImage,
IHostDVDDrive, IFloppyImage and IHostFloppyDrive) have been merged into
IMedium; CD/DVD and floppy media no longer need special treatment. The device type of
a medium determines in which context it can be used. Some functionality was moved to
the other storage-related interfaces.
IMachine::attachHardDisk and similar methods have been renamed and generalized to
deal with any type of drive and medium. IMachine::attachDevice() is the API method for
adding any drive to a storage controller. The floppy and DVD/CD drives are no longer
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handled specially, and that means you can have more than one of them. As before, drives
can only be changed while the VM is powered off. Mounting (or unmounting) removable
media at runtime is possible with IMachine::mountMedium().
Newly created virtual machines have no storage controllers associated with them. Even
the IDE Controller needs to be created explicitly. The floppy controller is now visible as
a separate controller, with a new storage bus type. For each storage bus type you can
query the device types which can be attached, so that it is not necessary to hardcode any
attachment rules.
This required matching changes e.g. in the callback interfaces (the medium specific change
notification was replaced by a generic medium change notification) and removing associated enums (e.g. DriveState). In many places the incorrect use of the plural form “media”
was replaced by “medium”, to improve consistency.
• Reading the IMedium::state attribute no longer automatically performs an accessibility
check; a new method IMedium::refreshState() does this. The attribute only returns the
state any more.
• There were substantial changes related to snapshots, triggered by the “branched
snapshots” functionality introduced with version 3.1. IConsole::discardSnapshot was
renamed to IConsole::deleteSnapshot().
IConsole::discardCurrentState and IConsole::discardCurrentSnapshotAndState were removed; corresponding new functionality
is in IConsole::restoreSnapshot(). Also, when IConsole::takeSnapshot() is called on a running virtual machine, a live snapshot will be created. The old behavior was to temporarily
pause the virtual machine while creating an online snapshot.
• The IVRDPServer, IRemoteDisplayInfo" and IConsoleCallback interfaces were
changed to reflect VRDP server ability to bind to one of available ports from a list of
ports.
The IVRDPServer::port attribute has been replaced with IVRDPServer::ports, which
is a comma-separated list of ports or ranges of ports.
An IRemoteDisplayInfo::port" attribute has been added for querying the actual port
VRDP server listens on.
An IConsoleCallback::onRemoteDisplayInfoChange() notification callback has been added.
• The parameter lists for the following functions were modified:
– IHost::removeHostOnlyNetworkInterface()
– IHost::removeUSBDeviceFilter()
• In the OOWS bindings for JAX-WS, the behavior of structures changed: for one, we implemented natural structures field access so you can just call a “get” method to obtain a field.
Secondly, setters in structures were disabled as they have no expected effect and were at
best misleading.
12.7 Incompatible API changes with version 3.0
• In the object-oriented web service bindings for JAX-WS, proper inheritance has been introduced for some classes, so explicit casting is no longer needed to call methods from a
parent class. In particular, IHardDisk and other classes now properly derive from IMedium.
• All object identifiers (machines, snapshots, disks, etc) switched from GUIDs to strings (now
still having string representation of GUIDs inside). As a result, no particular internal structure can be assumed for object identifiers; instead, they should be treated as opaque unique
handles. This change mostly affects Java and C++ programs; for other languages, GUIDs
are transparently converted to strings.
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• The uses of NULL strings have been changed greatly. All out parameters now use empty
strings to signal a null value. For in parameters both the old NULL and empty string is
allowed. This change was necessary to support more client bindings, especially using the
web service API. Many of them either have no special NULL value or have trouble dealing
with it correctly in the respective library code.
• Accidentally, the TSBool interface still appeared in 3.0.0, and was removed in 3.0.2. This
is an SDK bug, do not use the SDK for VirtualBox 3.0.0 for developing clients.
• The type of IVirtualBoxErrorInfo::resultCode changed from result to long.
• The parameter list of IVirtualBox::openHardDisk was changed.
• The method IConsole::discardSavedState was renamed to IConsole::forgetSavedState, and
a parameter was added.
• The method IConsole::powerDownAsync was renamed to IConsole::powerDown, and the
previous method with that name was deleted. So effectively a parameter was added.
• In the IFramebuffer interface, the following were removed:
– the operationSupported attribute;
(as a result, the FramebufferAccelerationOperation enum was no longer needed
and removed as well);
– the solidFill() method;
– the copyScreenBits() method.
• In the IDisplay interface, the following were removed:
– the setupInternalFramebuffer() method;
– the lockFramebuffer() method;
– the unlockFramebuffer() method;
– the registerExternalFramebuffer() method.
12.8 Incompatible API changes with version 2.2
• Added explicit version number into JAX-WS Java package names, such as org.virtualbox_2_2,
allowing connect to multiple VirtualBox clients from single Java application.
• The interfaces having a “2” suffix attached to them with version 2.1 were renamed again
to have that suffix removed. This time around, this change involves only the name, there
are no functional differences.
As a result, IDVDImage2 is now IDVDImage; IHardDisk2 is now IHardDisk; IHardDisk2Attachment is now IHardDiskAttachment.
Consequentially, all related methods and attributes that had a “2” suffix have been renamed; for example, IMachine::attachHardDisk2 now becomes IMachine::attachHardDisk().
• IVirtualBox::openHardDisk has an extra parameter for opening a disk read/write or readonly.
• The remaining collections were replaced by more performant safe-arrays. This affects the
following collections:
– IGuestOSTypeCollection
– IHostDVDDriveCollection
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– IHostFloppyDriveCollection
– IHostUSBDeviceCollection
– IHostUSBDeviceFilterCollection
– IProgressCollection
– ISharedFolderCollection
– ISnapshotCollection
– IUSBDeviceCollection
– IUSBDeviceFilterCollection
• Since “Host Interface Networking” was renamed to “bridged networking” and host-only
networking was introduced, all associated interfaces needed renaming as well. In detail:
– The HostNetworkInterfaceType enum has been renamed to HostNetworkInterfaceMediumType
– The IHostNetworkInterface::type attribute has been renamed to IHostNetworkInterface::mediumType
– INetworkAdapter::attachToHostInterface() has been renamed to INetworkAdapter::attachToBridgedInterfa
– In the IHost interface, createHostNetworkInterface() has been renamed to
createHostOnlyNetworkInterface()
– Similarly, removeHostNetworkInterface() has been renamed to removeHostOnlyNetworkInterface()
12.9 Incompatible API changes with version 2.1
• With VirtualBox 2.1, error codes were added to many error infos that give the caller a
machine-readable (numeric) feedback in addition to the error string that has always been
available. This is an ongoing process, and future versions of this SDK reference will document the error codes for each method call.
• The hard disk and other media interfaces were completely redesigned. This was necessary
to account for the support of VMDK, VHD and other image types; since backwards compatibility had to be broken anyway, we seized the moment to redesign the interfaces in a more
logical way.
– Previously, the old IHardDisk interface had several derivatives called IVirtualDiskImage, IVMDKImage, IVHDImage, IISCSIHardDisk and ICustomHardDisk for the various
disk formats supported by VirtualBox. The new IHardDisk2 interface that comes with
version 2.1 now supports all hard disk image formats itself.
– IHardDiskFormat is a new interface to describe the available back-ends for hard disk
images (e.g. VDI, VMDK, VHD or iSCSI). The IHardDisk2::format attribute can be
used to find out the back-end that is in use for a particular hard disk image. ISystemProperties::hardDiskFormats[] contains a list of all back-ends supported by the
system. ISystemProperties::defaultHardDiskFormat contains the default system format.
– In addition, the new IMedium interface is a generic interface for hard disk, DVD and
floppy images that contains the attributes and methods shared between them. It can
be considered a parent class of the more specific interfaces for those images, which
are now IHardDisk2, IDVDImage2 and IFloppyImage2.
In each case, the “2” versions of these interfaces replace the earlier versions that did
not have the “2” suffix. Previously, the IDVDImage and IFloppyImage interfaces were
entirely unrelated to IHardDisk.
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– As a result, all parts of the API that previously referenced IHardDisk, IDVDImage or IFloppyImage or any of the old subclasses are gone and will have replacements that use IHardDisk2, IDVDImage2 and IFloppyImage2; see, for example, IMachine::attachHardDisk2.
– In particular, the IVirtualBox::hardDisks2 array replaces the earlier IVirtualBox::hardDisks collection.
• IGuestOSType was extended to group operating systems into families and for 64-bit support.
• The IHostNetworkInterface interface was completely rewritten to account for the changes
in how Host Interface Networking is now implemented in VirtualBox 2.1.
• The IVirtualBox::machines2[] array replaces the former IVirtualBox::machines collection.
• Added IHost::getProcessorFeature() and ProcessorFeature enumeration.
• The parameter list for IVirtualBox::createMachine() was modified.
• Added IMachine::pushGuestProperty.
• New attributes in IMachine: accelerate3DEnabled, HWVirtExVPIDEnabled, guestPropertyNotificationPatterns,
CPUCount.
• Added IConsole::powerUpPaused() and IConsole::getGuestEnteredACPIMode().
• Removed ResourceUsage enumeration.
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