[vbox-dev] again with Machine States using API

Wiem mkaouer at yahoo.fr
Thu Mar 18 12:55:34 PDT 2010


Hello

 

I'm newby to VirtualBox API (I've been using VMWare for months and now I'm
joining VirtualBox community)

 

I want to code a sample program that manage installer virtual machines
(start, stop, save, retore etc)

 

I started using the sample code given with SDK

 

My sample program worked and I needed to check the virtual machine state in
order to figure out which operations are granted (PoweredOff : start and
restore, Running : stop, save etc) and it doesn't work for me, I tried
checking machine state using Imachine, Isession, Iconsole and I'm always
recovering rc failure "Error retrieving State" (check my code below)

 

I would like to know :

1.   Which classes should be implemented to be able to check machine state ?

2.   Which class / interface should I be using to check machine state ?

 

Thank you very much

Wiem

 

//--------------------------------------------------------------------------
-------------------------------------------------

Do

{

printf("Starting VM \n");

/* Start a VM session using the delivered VBox GUI. */

rc = virtualBox->OpenRemoteSession (session, guid, sessiontype, NULL,
&progress);

if (!SUCCEEDED(rc))

{

                printf("Could not open remote session. rc = 0x%x\n", rc);

                getchar();

                break;

        }      

        printf("VM successfully started \n");

        getchar();

        /* Wait until VM is running. */

        printf ("Running VM\n");

        rc = progress->WaitForCompletion (-1);

        if (!SUCCEEDED(rc))

        {

                printf("Could not start host VM. rc = 0x%x\n", rc);

                getchar();

                break;

        }

 

        /* Get console object. */

        session->get_Console(&console);

                                       

        /* Bring console window to front. */

        machine->ShowConsoleWindow(0);

 

        rc = console->get_State(MS); // MS is a MachineState *

 

        if (SUCCEEDED(rc))

        {

                printf("Current State: %S\n", GetStateName(MS)); //
GetStateName() : converts enum result to string

        }

        else 

        {

                printf("Error retrieving State \n"); 

        }

}While(0) ;

 

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