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Cleaning up when killed (Python recipe) by Miki Tebeka
ActiveState Code (http://code.activestate.com/recipes/533117/)

atexit handlers are not called when a process is killed, this recipe show how to fix that.

Python, 17 lines
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#!/usr/bin/env python

from signal import signal, SIGTERM
from sys import exit
import atexit

def cleanup():
    print "Cleanup"

if __name__ == "__main__":
    from time import sleep
    atexit.register(cleanup)

    # Normal exit when killed
    signal(SIGTERM, lambda signum, stack_frame: exit(1))

    sleep(10)

You might want to catch other signals (like SIGINT which in Python translates to KeyboardInterrupt).

Please note that it's very bad idea to mix threads and signals :)

Tags: sysadmin