Here's a very small IRC-like server example with no frills. Have several windows telnet into its port (or ports, it can handle several), and whatever line one telnet sends gets sent to all the other telnet clients. 

#!/usr/bin/perl

use IO::Socket;
use IO::Poll qw( POLLIN POLLOUT );
use strict;
$| = 1;

my $poll = IO::Poll->new;

$poll->mask($_ => POLLIN) for my @listens = map
  {
  IO::Socket::INET->new(LocalPort => $_, Listen => 9, Reuse => 1)
    or die "$@ opening socket on port $_"
  } my @ports  = @ARGV ? @ARGV : (6666);
my %listens = map { $_ => $_ } @listens;

print "ready on @ports...\n";

while(1)
  {
  $poll->poll;
  for my $h ($poll->handles(POLLIN))
    {
    if($listens{$h})
      {
      my $new = $h->accept;
      $poll->mask($new => POLLIN);
      print "accepted from: ", $new->peerhost, ":", $new->peerport, "\
+n";
      }
    elsif(sysread $h, my $in, 1024)
      {
      $listens{$_} or $h == $_ or print $_ $in for $poll->handles;
      }
    else
      {
      $poll->remove($h);
      }
    }
  }

[download]

In reply to Re^3: IO::Poll Examples? by tybalt89
in thread IO::Poll Examples? by sri

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.