#!/usr/bin/python
import os
import sys
from time import sleep

pid = os.fork()
if pid:
	while True:
		_pid, exit_status, _res_usage = os.wait4(pid, os.WNOHANG)
		print 'pid=%d _pid=%d, ret=0x%x' % (pid, _pid, exit_status)
		if pid == _pid:
			break
else:  # child
	sys.exit(0)