I've mostly stopped bothering with trying to deal with shell redirection and the portability issues it raises. Capture::Tiny abstracts the details away and lets me get on with my work. Here's the module's decription:

Capture::Tiny provides a simple, portable way to capture almost anything sent to STDOUT or STDERR, regardless of whether it comes from Perl, from XS code or from an external program. Optionally, output can be teed so that it is captured while being passed through to the original filehandles. Yes, it even works on Windows (usually). Stop guessing which of a dozen capturing modules to use in any particular situation and just use this one.

The capture_merged function should give you all the ammunition you need.

use strict;
use warnings;
use Capture::Tiny qw( capture_merged );

my $input  = shift;
my $output = '/home/me/output.txt';
my $run    = '/home/me/ipinfo.pl';
open my $infh, '<', $input  or die $!;
open my $ofh,  '>', $output or die $!;
while( <$infh> ) {
  chomp;
  my( $captured, @results ) 
    = capture_merged { system $run, $_ };
  print $ofh $captured;
}
close $ofh or die $!;
close $infh;

[download]

Dave

In reply to Re: BOTH STOUT and STDERR to same file. by davido
in thread BOTH STOUT and STDERR to same file. by hmb104

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.