[-
use warnings;
use strict;
use IPC::Open3;
use Symbol 'gensym'; 

$escmode = 0;
$http_headers_out{'Content-Type'} = "text/plain";

my $cmd = 'ls';

my $pid = open3(*HIS_IN, *HIS_OUT, *HIS_ERR, $cmd);

close(HIS_IN);  # give end of file to kid, or feed him

my @outlines = <HIS_OUT>;              # read till EOF
my @errlines = <HIS_ERR>;              # XXX: block potential if massive
print OUT "STDOUT: ", @outlines, "\n";
print OUT "STDERR: ", @errlines, "\n";

waitpid( $pid, 0 );
my $child_exit_status = $? >> 8;

print OUT "child_exit_status: $child_exit_status\n";
-]