#!/usr/bin/perl

use strict;
use warnings;

use IO::Handle;
use IO::Select;

my $nb_stdin = new IO::Select( *STDIN );

while ( 1 )
{
  if ( $nb_stdin -> can_read(0) )
  {
    my $line = <STDIN>;
    print "Got: ", $line,"\n";
  }
  else
  {
    print "Nothing on STDIN, doing something else\n";
    sleep 1;
  }
}