This is the simplest usage of IO::Select I can produce. It too, on Linux anyways, is very solid. I can kill -9 clients, and the server dosn't get hung. What do you have to do to make your symptoms appear using this script? You know I'm sure, that multiplexing with IO::Select is only meant for use with short messages; if you are doing large data transfers, you need to use fork or threads. This thread could be also be improved to use sysread instead of <>, but it generally works fine as is. 
#!/usr/bin/perl
use IO::Socket;
use IO::Select;

my @sockets;
my $machine_addr = 'localhost';
$main_sock = new IO::Socket::INET(LocalAddr=>$machine_addr,
      LocalPort=>1200,
      Proto=>'tcp',
      Listen=>3,
            Reuse=>1,
            );

die "Could not connect: $!" unless $main_sock;
print "Starting Server\n";

$readable_handles = new IO::Select();
$readable_handles->add($main_sock);

while (1)
{
  ($new_readable) = IO::Select->select($readable_handles, undef, undef
+, 0);

  foreach $sock (@$new_readable)
  {
    if ($sock == $main_sock)
    {
      $new_sock = $sock->accept();
      $readable_handles->add($new_sock);
    }
    else
    {
      $buf = <$sock>;
      if ($buf)
      { 
        print "$buf\n";
        my @sockets = $readable_handles->can_write();
    #print $sock "You sent $buf\n";
    foreach my $sck(@sockets){print $sck "$buf\n";}
        
      }
      else
      {
        $readable_handles->remove($sock);
        close($sock);
      }
    }
  }

}


print "Terminating Server\n";
close $main_sock;
getc();

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Old Perl Programmer Haiku ................... flash japh

In reply to Re^7: Does IO::Select work? Anywhere? by zentara
in thread Does IO::Select work? Anywhere? by BrowserUk

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