#!/usr/bin/env python # # Copyright 2007 Doug Hellmann. # # # All Rights Reserved # # Permission to use, copy, modify, and distribute this software and # its documentation for any purpose and without fee is hereby # granted, provided that the above copyright notice appear in all # copies and that both that copyright notice and this permission # notice appear in supporting documentation, and that the name of Doug # Hellmann not be used in advertising or publicity pertaining to # distribution of the software without specific, written prior # permission. # # DOUG HELLMANN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, # INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN # NO EVENT SHALL DOUG HELLMANN BE LIABLE FOR ANY SPECIAL, INDIRECT OR # CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS # OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, # NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN # CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. # """Illustrate using Unix signals and subprocess. """ __module_id__ = "$Id$" #end_pymotw_header import os import signal import subprocess import time import sys proc = subprocess.Popen(['python', 'signal_child.py']) print 'PARENT : Pausing before sending signal...' sys.stdout.flush() time.sleep(1) print 'PARENT : Signaling child' sys.stdout.flush() os.kill(proc.pid, signal.SIGUSR1)