#!/usr/bin/perl
use strict;
use warnings;
use IPC::Open3;

my($in, $out, $err, $pid);
open( $out, ">&STDOUT" ) or
    die "Can't dup STDOUT to OUTPUT: $!\n";
open( $err, ">&STDERR" ) or
    die "Can't dup STDERR to OUTERR: $!\n";

eval { $pid = open3($in, $out, $err, @ARGV) };
die "open3 gave trouble: $@\n" if $@;
print "It is running\n";
close $in;

print "stdout:\n";
print while <$out>;
close $out;

print "stderr:\n";
print while <$err>;
close $err;

__END__

# this is expected
./open3 echo "Hello World"
It is running
stdout:
Hello World
stderr:

# this is confusing the proverbial out of me
./open3 nosuchcommand
It is running
stdout:
stderr:
open3 gave trouble: open3: exec of nosuchcommand failed at ./open3 line 15

# The die obviosly ran but the code did not die, 
# ran to completion regardless then printed the error