#!/usr/bin/perl -w

use strict;
use warnings;
use POSIX ":sys_wait_h";

my $cpid = open CHLD_OUT, 'sh -c \'(sleep 10& echo $!)\'|' or die "open |:$!";
my $ccpid = <CHLD_OUT>;
chomp $ccpid;
print "sleep pid=$ccpid, sh pid=$cpid\n";
setpgrp $ccpid,0;


my $r = waitpid $ccpid,0;
print "waitpid returned $r, exiting\n";