Example #1
0
// Check the status for all selected writers
BOOL VSSClientGeneric::CheckWriterStatus()
{
    /* 
    http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vss/base/ivssbackupcomponents_startsnapshotset.asp
    */
    IVssBackupComponents* pVss = (IVssBackupComponents*) m_pVssObject;
    DestroyWriterInfo();

    // Gather writer status to detect potential errors
    CComPtr<IVssAsync>  pAsync;
    
    HRESULT hr = pVss->GatherWriterStatus(&pAsync.p);
    if (FAILED(hr)) {
       errno = b_errno_win32;
       return FALSE;
    } 

    // Waits for the async operation to finish and checks the result
    WaitAndCheckForAsyncOperation(pAsync.p);
      
    unsigned cWriters = 0;

    hr = pVss->GetWriterStatusCount(&cWriters);
    if (FAILED(hr)) {
       errno = b_errno_win32;
       return FALSE;
    }

    int nState;
    
    // Enumerate each writer
    for (unsigned iWriter = 0; iWriter < cWriters; iWriter++) {
        VSS_ID idInstance = GUID_NULL;
        VSS_ID idWriter= GUID_NULL;
        VSS_WRITER_STATE eWriterStatus = VSS_WS_UNKNOWN;
        CComBSTR bstrWriterName;
        HRESULT hrWriterFailure = S_OK;

        // Get writer status
        hr = pVss->GetWriterStatus(iWriter,
                             &idInstance,
                             &idWriter,
                             &bstrWriterName,
                             &eWriterStatus,
                             &hrWriterFailure);
        if (FAILED(hr)) {
            /* unknown */            
            nState = 0;
        }
        else {            
            switch(eWriterStatus) {
            case VSS_WS_FAILED_AT_IDENTIFY:
            case VSS_WS_FAILED_AT_PREPARE_BACKUP:
            case VSS_WS_FAILED_AT_PREPARE_SNAPSHOT:
            case VSS_WS_FAILED_AT_FREEZE:
            case VSS_WS_FAILED_AT_THAW:
            case VSS_WS_FAILED_AT_POST_SNAPSHOT:
            case VSS_WS_FAILED_AT_BACKUP_COMPLETE:
            case VSS_WS_FAILED_AT_PRE_RESTORE:
            case VSS_WS_FAILED_AT_POST_RESTORE:
    #if  defined(B_VSS_W2K3) || defined(B_VSS_VISTA)
            case VSS_WS_FAILED_AT_BACKUPSHUTDOWN:
    #endif
                /* failed */                
                nState = -1;
                break;

            default:
                /* ok */
                nState = 1;
            }
        }
        /* store text info */
        char str[1000];
        char szBuf1[200];
        char szBuf2[200];
        char szBuf3[200];
        wchar_2_UTF8(szBuf1, bstrWriterName.p, sizeof(szBuf1));
        itoa(eWriterStatus, szBuf2, sizeof(szBuf2));
        wchar_2_UTF8(szBuf3, GetStringFromWriterStatus(eWriterStatus), sizeof(szBuf3));
	snprintf(str, sizeof(str), "\"%s\", State: 0x%s (%s)",
		szBuf1, szBuf2, szBuf3);

        AppendWriterInfo(nState, (const char *)str);     
    }

    hr = pVss->FreeWriterStatus();

    if (FAILED(hr)) {
        errno = b_errno_win32;
        return FALSE;
    } 

    errno = 0;
    return TRUE;
}
Example #2
0
// Check the status for all selected writers
bool VSSClientGeneric::CheckWriterStatus()
{
    /*
    http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vss/base/ivssbackupcomponents_startsnapshotset.asp
    */
    IVssBackupComponents* pVssObj = (IVssBackupComponents*)m_pVssObject;
    if (!pVssObj) {
       Jmsg(m_jcr, M_FATAL, 0, "Cannot get IVssBackupComponents pointer.\n");
       errno = ENOSYS;
       return false;
    }
    DestroyWriterInfo();

    if (m_bWriterStatusCurrent) {
       m_bWriterStatusCurrent = false;
       pVssObj->FreeWriterStatus();
    }
    // Gather writer status to detect potential errors
    CComPtr<IVssAsync>  pAsync;

    HRESULT hr = pVssObj->GatherWriterStatus(&pAsync.p);
    if (FAILED(hr)) {
       JmsgVssApiStatus(m_jcr, M_FATAL, hr, "GatherWriterStatus");
       errno = b_errno_win32;
       return false;
    }

    // Waits for the async operation to finish and checks the result
    if (!WaitAndCheckForAsyncOperation(pAsync.p)) {
       errno = b_errno_win32;
       return false;
    }

    m_bWriterStatusCurrent = true;

    unsigned cWriters = 0;

    hr = pVssObj->GetWriterStatusCount(&cWriters);
    if (FAILED(hr)) {
       JmsgVssApiStatus(m_jcr, M_FATAL, hr, "GatherWriterStatusCount");
       errno = b_errno_win32;
       return false;
    }

    int nState;
    POOLMEM *szBuf = get_pool_memory(PM_FNAME);
    // Enumerate each writer
    for (unsigned iWriter = 0; iWriter < cWriters; iWriter++) {
        VSS_ID idInstance = GUID_NULL;
        VSS_ID idWriter= GUID_NULL;
        VSS_WRITER_STATE eWriterStatus = VSS_WS_UNKNOWN;
        CComBSTR bstrWriterName;
        HRESULT hrWriterFailure = S_OK;

        // Get writer status
        hr = pVssObj->GetWriterStatus(iWriter,
                             &idInstance,
                             &idWriter,
                             &bstrWriterName,
                             &eWriterStatus,
                             &hrWriterFailure);
        if (FAILED(hr)) {
            /* Api failed */
            JmsgVssApiStatus(m_jcr, M_WARNING, hr, "GetWriterStatus");
            nState = 0;         /* Unknown writer state -- API failed */
        } else {
            switch(eWriterStatus) {
            case VSS_WS_FAILED_AT_IDENTIFY:
            case VSS_WS_FAILED_AT_PREPARE_BACKUP:
            case VSS_WS_FAILED_AT_PREPARE_SNAPSHOT:
            case VSS_WS_FAILED_AT_FREEZE:
            case VSS_WS_FAILED_AT_THAW:
            case VSS_WS_FAILED_AT_POST_SNAPSHOT:
            case VSS_WS_FAILED_AT_BACKUP_COMPLETE:
            case VSS_WS_FAILED_AT_PRE_RESTORE:
            case VSS_WS_FAILED_AT_POST_RESTORE:
    #if  defined(B_VSS_W2K3) || defined(B_VSS_VISTA)
            case VSS_WS_FAILED_AT_BACKUPSHUTDOWN:
    #endif
                /* Writer status problem */
                wchar_2_UTF8(&szBuf, bstrWriterName.p);
                JmsgVssWriterStatus(m_jcr, M_WARNING, eWriterStatus, szBuf);
                nState = -1;       /* bad writer state */
                break;

            default:
                /* ok */
                nState = 1;        /* Writer state OK */
            }
        }
        /* store text info */
        char str[1000];
        bstrncpy(str, "\"", sizeof(str));
        wchar_2_UTF8(&szBuf, bstrWriterName.p);
        bstrncat(str, szBuf, sizeof(str));
        bstrncat(str, "\", State: 0x", sizeof(str));
        itoa(eWriterStatus, szBuf, sizeof_pool_memory(szBuf));
        bstrncat(str, szBuf, sizeof(str));
        bstrncat(str, " (", sizeof(str));
        wchar_2_UTF8(&szBuf, GetStringFromWriterStatus(eWriterStatus));
        bstrncat(str, szBuf, sizeof(str));
        bstrncat(str, ")", sizeof(str));
        AppendWriterInfo(nState, (const char *)str);
    }
    free_pool_memory(szBuf);
    errno = 0;
    return true;
}