#!/usr/bin/perl
# return.pl
print STDERR "err1!\nerr2!\n";
print STDOUT "out!\nout again!\n";
exit 1;

##</code><code>##

#!/usr/bin/perl
# test1.pl
use IPC::Open3;
$n = "\n";
open( OUTPUT, ">&STDOUT" ) or 
    die "Can't dup STDOUT to OUTPUT: $!$n";
open( OUTERR, ">&STDERR" ) or 
    die "Can't dup STDERR to OUTERR: $!$n";

eval { $pid = open3("<&STDIN", \*OUTPUT, \*OUTERR, 'perl return.pl') };
$@ && die "ERROR: $@$n";
@results = <OUTPUT>;
@errors  = <OUTERR>;
close OUTPUT;
close OUTERR;
print "---pid$n";     print $pid . $n;
print "---\$?$n";     print $? . $n;
print "---results$n"; foreach(@results) { print $_ . $n };
print "---errors$n";  foreach(@errors)  { print $_ . $n };

##</code><code>##

---pid
1480
---$?
1480
---results
out!
out again!
---errors
err1!
err2

##</code><code>##

#!/usr/bin/perl -w
# test2.pl
$n = "\n";
eval{
    open( OUTPUT, "+>&STDOUT" ) or 
        die "Can't dup STDOUT to OUTPUT: $!$n";
    open( OUTERR, "+>&STDERR" ) or 
        die "Can't dup STDERR to OUTERR: $!$n";
    $return = system('perl', 'return.pl');
    chomp ( @results = <OUTPUT> );
    chomp ( @errors  = <OUTERR> );
    close OUTPUT;
    close OUTERR;
};
$@ && die "ERROR: $@$n";
print "---return$n";  print $return>>8 , $n;
print "---results$n"; foreach(@results) { print $_ . $n };
print "---errors$n";  foreach(@errors)  { print $_ . $n };

##</code><code>##

err1!
err2
out!
out again!
---return
1
---results
---errors