#!/usr/local/bin/perl -w
use strict;
use Tk::Event;
Tk::Event::HandleSignals;
my $done = 0;

$SIG{'INT'}  = sub { print "Interrupt\n"; $done = 1 };
$SIG{'ALRM'} = sub { print "Alarm\n"; alarm(3) };

print "Loaded ",join(' ',sort keys %INC),"\n";


Tk::Event::IO->fileevent(\*STDIN,'readable',\&read_it);
$| = 1;

my $h = Tk::Event::IO->fileevent(\*STDIN,'readable');
print "Callback is $h\n";


alarm(3);
Tk::Event::DoOneEvent(0) while (!$done);

sub read_it
{
 my $line = <STDIN>;
 if (defined $line)
  {
   print $line;
  }
 else
  {
   $done = 1;
  }
}