How to use grant_privileges method in autotest

Best Python code snippet using autotest_python

virtualdisk.py

Source:virtualdisk.py

...40    if not size_mb or size_mb < 1:41        return4243    # Get Permission44    grant_privileges()4546    # Create file47    file_handle = CreateFileW(48        unicode(path),49        GENERIC_READ | GENERIC_WRITE,50        0,51        NULL,52        CREATE_ALWAYS,53        FILE_ATTRIBUTE_NORMAL,54        NULL)55    if file_handle == INVALID_HANDLE_VALUE:56        log.exception("Failed to create file %s" % path)5758    # Set pointer to end of file */59    file_pos = LARGE_INTEGER()60    file_pos.QuadPart = size_mb*1024*102461    if not SetFilePointerEx(file_handle, file_pos, 0, FILE_BEGIN):62        log.exception("Failed to set file pointer to end of file")6364    # Set end of file65    if not SetEndOfFile(file_handle):66        log.exception("Failed to extend file. Not enough free space?")6768    # Set valid data (if possible), ignore errors69    call_SetFileValidData(file_handle, file_pos)7071    # Set pointer to beginning of file72    file_pos.QuadPart = 073    result = SetFilePointerEx(74                   file_handle,75                   file_pos,76                   NULL,77                   FILE_BEGIN)78    if not result:79        log.exception("Failed to set file pointer to beginning of file")8081    # Zero chunk of file82    zero_file(file_handle, clear_bytes)8384    # Set pointer to end - clear_bytes of file85    file_pos.QuadPart = size_mb*1024*1024 - clear_bytes86    result = SetFilePointerEx(87                   file_handle,88                   file_pos,89                   NULL,90                   FILE_BEGIN)91    if not result:92        log.exception("Failed to set file pointer to end - clear_bytes of file")9394    # Zero file95    zero_file(file_handle, clear_bytes)9697    CloseHandle(file_handle)9899def grant_privileges():100    # For version < Windows NT, no privileges are involved101    full_version = sys.getwindowsversion()102    major, minor, build, platform, txt = full_version103    if platform < 2:104        log.debug("Skipping grant_privileges, because Windows 95/98/ME was detected")105        return106107    # SetFileValidData() requires the SE_MANAGE_VOLUME_NAME privilege, so we must enable it108    #   on the process token. We don't attempt to strip the privilege afterward as that would109    #  introduce race conditions. */110    handle = ctypes.c_long(0)111    if OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY, byref(handle)):112        luid = LUID()113        if LookupPrivilegeValue(NULL, SE_MANAGE_VOLUME_NAME, byref(luid)):
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