In a nonforking server I need to send STDOUT to any number of attached clients. I'm currently trying to bind STDOUT to the socket via $fd = filno $client; open STDOUT, ">&=$fd"; and this doesn't seem to be working when I start cylcing through the attached clients.

I've included by code so you can see exactly what I am trying to do. Perhaps (in fact even likely) I am making some basic mistake. Any input would be appreciated.

The log data indicates that I am, in fact, cycling through the clients as expected. I'm just lost at this point as to how to proceed.

#!/usr/bin/perl -w
# nonforker - server who multiplexes without forking

use POSIX;
use IO::Socket;
use IO::Select;
use Socket;
use Fcntl;
use Tie::RefHash;
use Carp;

BEGIN { $coral_dir = "/usr/local/Coral"; } # This will be edited durin
+g build.
use lib "$coral_dir/lib"; #coral global libdir#
use lib "../../lib"; #coral local libdir#
use CRL;
use IO::Scalar;

$port = 9001;            # change this at will

# Listen to port.
$server = IO::Socket::INET->new(LocalPort => $port,
                Listen      => 10 )
  or die "Can't make server socket: $@\n";


%ready = ();

tie %ready, 'Tie::RefHash';

nonblock($server);
$select = IO::Select->new($server);
print "Server started\n";
open LOG, ">./errlog" or die "cannot open errlog $!\n";

print "Starting CoralReef\n";
#Coral::quick_start(0, 0, Coral::API_CELL);
Coral::quick_start();
print "Quick start finished\n";

# Main loop: check reads/accepts, check writes, check ready to process
while (1) {
  my $client;
  my $rv;
  my $data;
  # check for new information on the connections we have
  # anything to read or accept?
  foreach $client ($select->can_read(0)) {
    if ($client == $server) {
      # accept a new connection
      $client = $server->accept();
      $select->add($client);
      nonblock($client);
      recv($client, $duration, 10, 0);
      $ready{$client} = time + $duration;
      $out_name = time;
      print LOG "MAIN: $client\n";
      &swap_stdout($client);
      $writer = Coral::write_open("-", undef, "none");
      &revert_stdout;
      if (!defined($writer)) {
    Coral::puts("Error, could not open output file!");
    exit(1);
      } else {
    Coral::puts("Writing to file: $out_name");
      }
      Coral::write_init_all($writer);
      $endtime = time + $duration;
      Coral::puts("$duration, $endtime, $out_name\n");
    }
  }
  $iface = Coral::read_cell_all(\$binfo, \$cell);
  foreach $client (keys %ready) {
    handle($client);
  }
}

# handle($socket) deals with all pending requests for $client
sub handle {
    # requests are in $ready{$client}
    # send output to $outbuffer{$client}
    my $client = shift;
    my $request;
    print LOG "HANDLE: $client\n";
    &swap_stdout($client);
    if (Coral::write_cell($writer, $iface, $cell) < 0) { 
      Coral::puts("Could not write cell! exiting!");
      exit(2); 
    }
    &revert_stdout;
    if ($ready{$client} <= time) {
      &swap_stdout($client);
      Coral::write_close($writers{$writer}[2]);
      &revert_stdout;
      delete $ready{$client};
      $select->remove($client);
      $client->close;
      next;
    }
}

# nonblock($socket) puts socket into nonblocking mode
sub nonblock {
    my $socket = shift;
    my $flags;
    $flags = fcntl($socket, F_GETFL, 0)
        or die "Can't get flags for socket: $!\n";
    fcntl($socket, F_SETFL, $flags | O_NONBLOCK)
        or die "Can't make socket nonblocking: $!\n";
}

#bind STDOUT to the client socket and unbuffer
sub swap_stdout {
my $client = shift;
my $fd = fileno($client);
print LOG "SWAP: $client == $fd\n";
open(STDSAVE, ">&STDOUT");
open(STDOUT, ">&=$fd");
select(STDOUT);
$|=1;
}

# revert to the default STDOUT
sub revert_stdout {
close STDOUT;
open(STDOUT, ">&STDSAVE");
}
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