蟒蛇 - 终止子进程时，脚本调用的bash

问题描述

我有一个python脚本：zombie.py

I have a python script: zombie.py

from multiprocessing import Process
from time import sleep
import atexit

def foo():
    while True:
        sleep(10)

@atexit.register
def stop_foo():
    p.terminate()
    p.join()

if __name__ == '__main__':
    p = Process(target=foo)
    p.start()

    while True:
        sleep(10)

当我与蟒蛇zombie.py和放大器运行此; 并杀死父进程杀死-2 ，在停止（）正确调用和两个进程终止。

When I run this with python zombie.py & and kill the parent process with kill -2, the stop() is correctly called and both processes terminate.

现在，假设我有一个bash脚本zombie.sh：

Now, suppose I have a bash script zombie.sh:

#!/bin/sh

python zombie.py &

echo "done"

和我在命令行中运行 ./ zombie.sh 。

现在，停止（）永远不会当父就会被杀死调用。如果我运行杀-2 父过程中，没有任何反应。 杀-15 或杀死-9 均只有杀掉父进程，而不是孩子：

Now, stop() never gets called when the parent gets killed. If I run kill -2 on the parent process, nothing happens. kill -15 or kill -9 both just kill the parent process, but not the child:

[foo@bar ~]$ ./zombie.sh
done
[foo@bar ~]$ ps -ef | grep zombie | grep -v grep
foo 27220     1  0 17:57 pts/3    00:00:00 python zombie.py
foo 27221 27220  0 17:57 pts/3    00:00:00 python zombie.py
[foo@bar ~]$ kill -2 27220
[foo@bar ~]$ ps -ef | grep zombie | grep -v grep
foo 27220     1  0 17:57 pts/3    00:00:00 python zombie.py
foo 27221 27220  0 17:57 pts/3    00:00:00 python zombie.py
[foo@bar ~]$ kill 27220
[foo@bar ~]$ ps -ef | grep zombie | grep -v grep
foo 27221     1  0 17:57 pts/3    00:00:00 python zombie.py

这是怎么回事？我怎样才能确保子进程与父去世？

What is going on here? How can I make sure the child process dies with the parent?

推荐答案

更​​新：此解决方案不通过信号杀死进程工作

Update: This solution doesn't work for processes killed by a signal.

您的孩子的过程是不是一个。它是活的。

Your child process is not a zombie. It is alive.

如果你想被杀死子进程时，其父的正常退出的再设置 p.daemon = TRUE 在 p.start（）。从：

If you want the child process to be killed when its parent exits normally then set p.daemon = True before p.start(). From the docs:

当一个进程退出时，它会试图终止其所有恶魔的子进程。

看着。

The log shows that if the parent is killed by a signal then "atexit" callback is not called (and ps shows that the child is alive in this case). See also Multiprocess Daemon Not Terminating on Parent Exit.

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