I'm trying to port a Unix Perl IRC daemon (Pircd) to Windows 2000 (Active Perl 5.6).

I think maybe the only thing that I cannot handle is this thing about setting the socket (of a new client connection) to 'non-blocking'.

The orginal code refers to a setnonblocking() subroutine. See below.

  foreach $client ($select->can_read(1)) {
    if($serversocks{$client}) {
      # Activity on the listening socket means we have a new
      # client attempting to connect.
      # Get ahold of the new socket, assign it to all the whatnot, etc
      $client = $client->accept;
      $select->add($client);
      &setnonblocking($client); # <--- SEE HERE
      $connections{$client} = Connection->new($client, \%outbuffer, $U
+tils::thisserver);
      $unfinished{$client}  = $connections{$client};
    }
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The problem is that the setnonblocking() subroutine uses some functions that are not available on Windows 2000 (namely F_GETFL and F_SETFL). Here is the subroutine.

sub setnonblocking {
  my $sock = shift;
  # Get the current state of the socket..
  my $flags = fcntl($sock, F_GETFL, 0) or
    die "Can't get the flags on socket: $!\n";
  # ..and then add O_NONBLOCK (nonblocking-ness) on to it.
  fcntl($sock, F_SETFL, $flags | O_NONBLOCK) or
    die "Can't set socket non-blocking: $!\n";
}
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So the big question is:

How can I rewrite this subroutine so that it will work on Windows 2000 and accomplish the same purpose (set the socket to be non-blocking)?