bin/pid-ns-init

#!/usr/bin/env python
# Copyright 2018 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

import os
import sys


def main(argv):
	if len(argv) < 2:
		return 'Usage: {} <main-child-pid>'.format(argv[0])
	main_child_pid = int(argv[1])

	# wait for child processes
	while True:
		pid, status = os.wait()
		if pid == main_child_pid:
			if os.WIFEXITED(status):
				return os.WEXITSTATUS(status)
			elif os.WIFSIGNALED(status):
				os.kill(os.getpid(), os.WTERMSIG(status))
			# go to the unreachable place
			break

	# this should never be reached
	return 127


if __name__ == '__main__':
	sys.exit(main(sys.argv))