import errno
import os
import subprocess
import signal
import time

def handle(sig, frame):
	print 'SIGCHLD'

if __name__ == '__main__':

	signal.signal(signal.SIGCHLD, handle)
	
	p1 = None
	p2 = None

	try:
		p1 = subprocess.Popen('/bin/date')
	except OSError, e:
		if e[0] == errno.EINTR:
			print '1st Popen was Interrupted'
		else:
			raise

	try:
		p2 = subprocess.Popen('/bin/date', preexec_fn = lambda : time.sleep(2))
	except OSError, e:
		if e[0] == errno.EINTR:
			print '2nd Popen was Interrupted'
		else:
			raise

	if p1 is not None:
		print 'PID1 was: %d' % p1.pid
		p1.wait()
	if p2 is not None:
		print 'PID2 was: %d' % p2.pid
		p2.wait()