#!/usr/bin/env perl

#
# The sole function of this script is to provide a stdin that doesn't
# read data or return EOF to its children.  If there's a clean,
# portable, not-Perl way to do this, then that should replace this.
#
use warnings;
use strict;

my $pid = open(my $fh, "|-", @ARGV) or die;
waitpid($pid, 0) == $pid or die;
my $rc;
if ($? == 0) {
    $rc = 0;
} elsif ($? >= 256) {
    $rc = $? >> 8;
} else {
    $rc = ($? & 127) | 128;
}
exit $rc;