python守护进程中的子子进程终止

Question

I have damon in python which runs external program: 我在python运行外部程序：

subprocess.call(["java", "-jar", "start.jar"])

when I kill daemon, the child process (java) is still running 当我杀死守护进程时，子进程（java）仍在运行

how can I make so that child process is also killed ? 我怎么能让孩子的过程也被杀死？

Answer 1

Use subprocess.Popen() instead of subprocess.call() . 使用subprocess.Popen()而不是subprocess.call() 。 For example: 例如：

import subprocess
my_process = subprocess.Popen(['ls', '-l'])

To terminate the child: 终止孩子：

my_process.kill()

To capture the kill signal, you could so something like this: 要捕获kill信号，你可以这样：

import signal
import sys
def signal_handler(signal, frame):
    sys.exit(0)
signal.signal(signal.SIGINT, signal_handler)