CommandRunner.py 文件源码

def exe(cmd, timeout=-1):
    """
    Executes a command through the shell.
    timeout in minutes! so 1440 mean is 24 hours.
    -1 means never
    """
    proc = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, \
                            stderr=subprocess.STDOUT, close_fds=True,\
                            preexec_fn=os.setsid)
    signal.signal(signal.SIGALRM, alarm_handler)
    if timeout > 0:
        signal.alarm(int(timeout*60))  
    try:
        stdoutVal, stderrVal =  proc.communicate()
        signal.alarm(0)  # reset the alarm
    except Alarm:
        logging.error(("Command was taking too long. "
                       "Automatic Timeout Initiated after %d" % (timeout)))
        os.killpg(proc.pid, signal.SIGTERM)
        proc.kill()
        return 214,None,None

    retCode = proc.returncode
    return retCode,stdoutVal,stderrVal