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How to use _check_for_subprocess_exception method in autotest

Best Python code snippet using autotest_python

parallel.py

Source:parallel.py

...45            sys.stdout.flush()46            sys.stderr.flush()47        finally:48            os._exit(0)49def _check_for_subprocess_exception(temp_dir, pid):50    ename = temp_dir + "/debug/error-%d" % pid51    if os.path.exists(ename):52        try:53            e = pickle.load(file(ename, 'r'))54        except ImportError:55            with open(ename, 'r') as fp:56                file_text = fp.read()57            raise error.TestError(58                    'Subprocess raised an exception that could not be '59                    'identified. The root cause exception is in the text '60                    'that follows: ' + file_text)61        finally:62            # Rename the error-pid file so that they do not affect later child63            # processes that use recycled pids.64            i = 065            while True:66                pename = ename + ('-%d' % i)67                i += 168                if not os.path.exists(pename):69                    break70            os.rename(ename, pename)71        raise e72def fork_waitfor(tmp, pid):73    (pid, status) = os.waitpid(pid, 0)74    _check_for_subprocess_exception(tmp, pid)75    if status:76        raise error.TestError("Test subprocess failed rc=%d" % (status))77def fork_waitfor_timed(tmp, pid, timeout):78    """79    Waits for pid until it terminates or timeout expires.80    If timeout expires, test subprocess is killed.81    """82    timer_expired = True83    poll_time = 284    time_passed = 085    while time_passed < timeout:86        time.sleep(poll_time)87        (child_pid, status) = os.waitpid(pid, os.WNOHANG)88        if (child_pid, status) == (0, 0):89            time_passed = time_passed + poll_time90        else:91            timer_expired = False92            break93    if timer_expired:94        logging.info('Timer expired (%d sec.), nuking pid %d', timeout, pid)95        utils.nuke_pid(pid)96        (child_pid, status) = os.waitpid(pid, 0)97        raise error.TestError("Test timeout expired, rc=%d" % (status))98    else:99        _check_for_subprocess_exception(tmp, pid)100    if status:101        raise error.TestError("Test subprocess failed rc=%d" % (status))102def fork_nuke_subprocess(tmp, pid):103    utils.nuke_pid(pid)...

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