Python调用系统命令设置超时时间

    python通过subprocess模块调用系统命令。实际使用中，有一次是命令进入了交互模式，结果web端直接卡死了。调用时设置一个超时时间，时间用完后自动断开。这样就避免了系统因为调用命令而僵死的问题。

def sys_command_outstatuserr(cmd, timeout=120):
    p = Popen(cmd, stdout=PIPE, stderr=PIPE, shell=True)
    t_beginning = time.time()
    seconds_passed = 0
    while True:
        if p.poll() is not None:
            res = p.communicate()
            exitcode = p.poll() if p.poll() else 0
            return res[0], exitcode, res[1]
        seconds_passed = time.time() - t_beginning
        if timeout and seconds_passed > timeout:
            p.terminate()
            out, exitcode, err = '', 128, '执行系统命令超时'
            return out, exitcode, err
        time.sleep(0.1)

def sys_command_outstatuserr(cmd, timeout=120):

    p = Popen(cmd, stdout=PIPE, stderr=PIPE, shell=True)

    t_beginning = time.time()

    seconds_passed = 0

    while True:

        if p.poll() is not None:

            res = p.communicate()

            exitcode = p.poll() if p.poll() else 0

            return res[0], exitcode, res[1]

        seconds_passed = time.time() - t_beginning

        if timeout and seconds_passed > timeout:

            p.terminate()

            out, exitcode, err = '', 128, '执行系统命令超时'

            return out, exitcode, err

        time.sleep(0.1)

def sys_command_outstatuserr(cmd, timeout=120):

    p = Popen(cmd, stdout=PIPE, stderr=PIPE, shell=True)

    t_beginning = time.time()

    seconds_passed = 0

    while True:

        if p.poll() is not None:

            res = p.communicate()

            exitcode = p.poll() if p.poll() else 0

            return res[0], exitcode, res[1]

        seconds_passed = time.time() - t_beginning

        if timeout and seconds_passed > timeout:

            p.terminate()

            out, exitcode, err = '', 128, '执行系统命令超时'

            return out, exitcode, err

        time.sleep(0.1)