[vbox-dev] getStatistic method issues

Igor Shkodyrev mobspot at gmail.com
Thu Jan 28 12:09:43 PST 2010

my Vbox v3.1.2 is running on Linux Ubuntu Desktop 9.10 as a host
system, as a guest system i use Ubuntu Server 9.10 with Guest
Additions installed.
I tried to write a function on Python which returns information about
the OS running inside the virtual machine, for this purpose i was
going to use methods of IGuest interface.

At first i tried to modify existing vboxshell.py script in order to
implement own function 'stats3':

def stats3Cmd(ctx, args):
   print args
   vers = ctx['vb'].version
   print "Version is", vers

   if (len(args) < 2):
       print "usage: stats3 [vmname|uuid]"
       return 0

   mach = argsToMach(ctx,args)
   if mach == None:
       return 0
   os = ctx['vb'].getGuestOSType(mach.OSTypeId)
   print "  Name [name]: %s" %(mach.name)
   print "  ID [n/a]: %s" %(mach.id)
   print "  OS Type [n/a]: %s" %(os.description)

   manager = ctx['mgr']
   vb = ctx['vb']
   session = manager.getSessionObject(vb)
   if mach.sessionState == ctx['ifaces'].SessionState_Open:
       vb.openExistingSession(session, mach.id )
       vb.openSession(session, mach.id )

   console = session.console
   guest = console.guest
   guestadd_ver1 = guest.additionsVersion
   print guestadd_ver1

   cpu = 0
   threads = guest.getStatistic( cpu, 4 )
   print threads

   return 0


after execution this function i've got the following traceback:
$ python vboxshell2.py
Running VirtualBox version 3.1.2
vbox> stats3 ubuntusrv1
['stats3', 'ubuntusrv1']
Version is 3.1.2
 Name [name]: ubuntusrv1
 ID [n/a]: 1c58fc27-ed25-4e82-b041-47c312296b82
 OS Type [n/a]: Ubuntu
0x80070057 (Invalid argument value (NS_ERROR_INVALID_ARG))
Traceback (most recent call last):
 File "vboxshell2.py", line 1258, in interpret
   done = runCommand(ctx, cmd)
 File "vboxshell2.py", line 1177, in runCommand
   return runCommandArgs(ctx, args)
 File "vboxshell2.py", line 1170, in runCommandArgs
   return ci[1](ctx, args)
 File "vboxshell2.py", line 642, in stats3Cmd
   threads = guest.getStatistic( cpu, 4 )
 File "<XPCOMObject method 'getStatistic'>", line 3, in getStatistic
Exception: 0x80070057 (Invalid argument value (NS_ERROR_INVALID_ARG))

after this i tried to implement this function to work over vboxwebsrv,
but .. no luck again:
$ python vboxtests.py

Version is 3.1.2
revision is 56127
host is Linux
home folder /home/isv/.VirtualBox

Traceback (most recent call last):
 File "vboxtests.py", line 90, in <module>
 File "vboxtests.py", line 85, in main
   machineInfo(manager, machine)
 File "vboxtests.py", line 61, in machineInfo
   memory_available = guest.getStatistic( cpu, 4 )
 File "/home/isv/home/diplom/src/VirtualBox_wrappers.py", line 4114,
in getStatistic
 File "/home/isv/home/diplom/src/VirtualBox_services.py", line 3746,
in IGuest_getStatistic
   response = self.binding.Receive(IGuest_getStatisticResultMsg.typecode)
 File "/usr/lib/pymodules/python2.6/ZSI/client.py", line 536, in Receive
   return _Binding.Receive(self, replytype, **kw)
 File "/usr/lib/pymodules/python2.6/ZSI/client.py", line 455, in Receive
   raise FaultException(msg)
ZSI.FaultException: VirtualBox error:  (0x0)
<VirtualBox_services_types.RuntimeFault_Holder object at 0xa9fa28c>

the following output fragment in vboxwebsrv was printed while
executing the getStatistic method:
25: accepted connection from IP= socket=9...
-- entering __vbox__IGuest_USCOREgetStatistic
  findRefFromId(): looking up objref 41f8a9570158f2dd-0000000000000007
  findRefFromId(): sessid 41F8A9570158F2DD, objid 7
  calling COM method GetStatistic
  error, raising SOAP exception
API return code:            0x80070057 (NS_ERROR_INVALID_ARG)
COM error info result code: 0x0
COM error info text:        <NULL>
-- leaving __vbox__IGuest_USCOREgetStatistic, rc: 0x80070057 (-2147024809)
#### SOAP FAULT: VirtualBox error:  (0x0) [SOAP-ENV:Client]
Request served

was anyone able to implement any function with use of getStatistic method?
if yes, any example of getStatistic use will be very appreciated.


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