I'm not sure what your project entails, but if you are using Tk, it would be good to be aware of fileevent. It gives you non-blocking reads. 
#!/usr/bin/perl
use warnings;
use strict;
use Tk;

my $mw = new MainWindow;

my $t = $mw->Text(-width => 80, -height => 25, -wrap => 'none');
                                             $t->pack(-expand => 1);


open(CHILD, "./read-stdout-piper 2>&1 |") or die "Can't open: $!";
$mw->fileevent(\*CHILD, 'readable', [\&fill_text_widget,$t]);
MainLoop;

sub fill_text_widget {
          my($widget) = @_;

          $_ = <CHILD>;

         if((defined $_) && ($_ > 5)){print chr(07)}
          $widget->insert('end', $_);
          $widget->yview('end');

}

[download]
And the sender script 
!/usr/bin/perl

$|++;

for my $i ( 0 .. 10) {
        print $i, "\n";
        sleep 1;
    }

print "sleeping 5\n";
sleep 5;

for my $i ( 0 .. 10) {
        print $i, "\n";
        sleep 1;
    }

[download]
I'm not really a human, but I play one on earth. flash japh

In reply to Re: Perl:TK - standard output to text widget by zentara
in thread Perl:TK - standard output to text widget by crabbdean

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