Hi monks,

in a very small prefork proxy server script, see below, I want to found which forked child (PID) process the current URI request.
In my tests I get only PID 0 (Ex: child 0 accept request URI: http://web.com/)

Best regards
Josef

#!/usr/bin/perl -w

# Description: preforker proxy

use 5.16.0;
use HTTP::Daemon;
use LWP::UserAgent;
use Fcntl ':flock';

# global variables
my $ip = '127.0.0.1';
my $port = '3128';
my $MIN_CHILDREN       = 5;    # number of children to maintain
my $MAX_REQ_PER_CHILD  = 30;   # number of req processed per child
my %children           = ();   # keys are current child process IDs
my $children           = 0;    # current number of children
$| = 1;

my $agent = LWP::UserAgent->new;
$agent->agent("perl proxy");

# establish SERVER socket, bind and listen.
my $master = HTTP::Daemon->new(
           LocalPort => $port,
           LocalAddr => $ip
           ) or die "Cannot create master socket: $!\n";

# create initial children
for (1..$MIN_CHILDREN) { &newChild($master) }

# keep children - a never ending loop for the parent process which 
# just monitors dying children and generates new ones
while (1) {
   sleep;
   for (my $i = $children; $i < $MIN_CHILDREN; $i++ ) { 
       &newChild($master) 
   }
}

exit (0);


###################################################################
### Subs
###################################################################

# newChild - a forked child process that actually does some work
sub newChild {
    my $socket = shift;
    my $pid;

    defined ($pid = fork) or die "Cannot fork child: $@\n";
    if ($pid) {
        # parent code
        $children{$pid} = 1;         # child is using this pid
        $children++;                 # Increase the child counter
        print "forked new child with PID $pid, we have now $children c
+hildren(s)\n";
    }

    &child_execute($socket) unless $pid;
}

sub child_execute {
   my $master = shift;
   my $i = 0;

   while ($i < $MAX_REQ_PER_CHILD) {  # Loop for $childLifetime reques
+ts
      $i++;
      flock($master, 2);          # LOCK_EX
      my $slave = $master->accept or die "accept: $!";
      flock($master, 8);          # LOCK_UN
      $slave->autoflush(1);

      my $request = $slave->get_request;
      my $url = $request->url;

# which PID execute this request???
      print "child accept request URI: $url\n";  

      my $response = $agent->simple_request($request);

      if ($response->is_success) { my $content = $response->content}

      $slave->send_response($response);
      close $slave;
  }
  exit (0);
}
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