Elo

#!/bin/perl -w

use strict;
use Socket;

my ($domain, $wordlist) = @ARGV;

$| = 1;
$SIG{CHLD} = 'IGNORE';
my $childs = 10;
my $i = 0;

open (WL,$wordlist);

while(<WL>) { 
	chomp($_);
	my $packed = inet_aton($_.$domain);
	if(defined($packed)) {
		if (fork == 0) {
			my $ip = inet_ntoa($packed);
			print "$_.$domain resolves to $ip\n";
		} 
		else {
			$i++;
			if($i >= $childs) {
				for(1..$childs) {
				wait();
				$i--;
				}
			}
		}
	}
	else {
		next;
	}
}