Question

How can I redirect the STDOUT stream to two files (duplicates) within my Perl script? Currently I am just streaming into a single log file:

open(STDOUT, ">$out_file") or die "Can't open $out_file: $!\n";

What do I have to change? Thx.

Answer 1

You can also use IO::Tee.

use strict;
use warnings;
use IO::Tee;

open(my $fh1,">","tee1") or die $!;
open(my $fh2,">","tee2") or die $!;

my $tee=IO::Tee->new($fh1,$fh2);

select $tee; #This makes $tee the default handle.

print "Hey!\n"; #Because of the select, you don't have to do print $tee "Hey!\n"

And yes, the output works:

> cat tee1
Hey!
> cat tee2
Hey!