Hello all, I am Paolo F. a newcomer (a.k.a TheMagician) and I am in search for wisdom. I would like to get a "$message" from this tcp server, an process (if available) always two $messages at a time. When a process finishes another one will be forked until the end of the "$messages".

### tcp server

use DBI;
use IO::Socket::INET;

### flush after every write
$|= 1;

### infinite loop
while(1) {
  my($socket, $client_socket);
  my($peeraddress, $peerport);
  my($row, $data);
  my @processes= ('one', 'two', 'three', 'four', 'five', 'six', 'seven
+', 'eight', 'nine', 'ten');

  # creating object interface of IO::Socket::INET modules which intern
+ally does
  # socket creation, binding and listening at the specified port addre
+ss.
  $socket = new IO::Socket::INET (
    LocalHost=> '127.0.0.1',
    LocalPort=> '5000',
    Proto=> 'tcp',
    Listen=> 5,
    Reuse=> 1
  ) or die "ERROR in Socket creation: $!\n";

  print "I am waiting clients to connect on port 5000.\n";
  while($row= shift(@processes)) {
    $client_socket = $socket->accept();
    $peeraddress = $client_socket->peerhost();
    print "Sending $row to $peeraddress:$peerport)... ";

    # write to the newly accepted client.
    print $client_socket "$row\n";

    # read from the newly accepted client.
    $data = <$client_socket>;
    chomp($data);
    print "got $data from client.\n";

    $client_socket->close();
  }
  $socket->close();
}
[download]

The client part is giving me headaches.

### tcp client

use strict;
use warnings 'all';

sub sfork($&) {
  my($max, $code)= @_;

  foreach my $c (1..$max) {
    wait unless $c<=$max;
    die "Cannot fork: $!\n" unless defined(my $pid= fork);
    exit $code->($c) unless $pid;
  }
  1 until -1 == wait;
}

sfork 2, sub {
  sub getFromProducer {
    use IO::Socket::INET;

    my($socket, $data);
    $socket= new IO::Socket::INET (
      PeerHost=> '127.0.0.1',
      PeerPort=> '5000',
      Proto=> 'tcp'
    ) or die "ERROR in Socket creation: $!\n";
    $socket->autoflush(1);
    $data= <$socket>;
    chomp($data);
    $socket->close();
    return $data;
  }

  while(my $data= &getFromProducer) {
    print "($$) Got $data from producer.\n";
  }
}
[download]

I am not able to adapt the sfork to accomplish this task. Any help? All the best, TheMagician (Paolo F.)

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