use strict;

use warnings;

use Capture::Tiny qw/capture tee/;

print "Type some text.  Type 'exit' to quit\n";

my ($out, $err) = tee {

  while (<>) {

    last if /^exit$/;

    print "Echoing to STDOUT: $_";

    print STDERR "Echoing to STDERR: $_";

  }

};

print "\nCaptured STDOUT was:\n" . ( defined $out ? $out : 'undef' ); 

print "\nCaptured STDERR was:\n" . ( defined $err ? $err : 'undef' );