#!/usr/local/bin/perl -w
use strict;
use Tk;
use IO::File;
sub readfile
{
my ($t,$fh) = @_;
my $size = (stat($fh))[7];
my $len = $size - $t->{'posn'};
if ($len > 0)
{
my $buffer = "";
my $got = sysread($fh,$buffer,$len);
$t->insert('end',$buffer);
$t->{posn} += $got;
$t->see('end');
}
}
my $mw = MainWindow->new;
my $fh = IO::File->new("<$ARGV[0]");
my $t = $mw->Scrolled('Text',-scrollbars => 'w');
$t->pack(-expand => 1, -fill => 'both');
$t->{posn} = 0;
$t->repeat(5000,sub { readfile($t,$fh) } );
MainLoop;