#!/usr/bin/perl --
use strict; use warnings;
use Proc::Background;

my @commands = (
    [ 'echo', 'arg','arg', ] ,
    [ 'perl', '-le',' print 1; sleep 1; warn 2; sleep 1; die 3;' ],
);

my @procs = map {  Proc::Background->new(@$_); } @commands;

$_->wait for @procs;

system 'echo', 'nowTheyAreAllDead.pl', '--pidsAndExitStatus', map { $_->pid, $_->wait } @procs;
__END__
arg arg
1
2 at -e line 1.
3 at -e line 1.
nowTheyAreAllDead.pl --pidsAndExitStatus 2956 0 2120 65280