Mine

use strict;
use warnings;
use vars qw($VERSION %IRSSI);

use Irssi;
$VERSION = '1.00';
%IRSSI = (
        authors         => 'QwErTz',
        contact         => 'qwertz@videotron.ca',
        name            => 'Sysinfo OS X',
);

use Irssi qw(command_bind signal_add);

sub subSysinfo {

        # Global Variables
        my ($data, $server, $witem) = @_;

        # Long Variables
        my ($cpu_type_long, $kernel_release_long, $uptime_long, $mem_total_long, $mem_used_long) = @_;
        # Chop Variables
        my ($cpu_type_chop, $kernel_release_chop, $uptime_chop) = @_;
        # Final Variables
        my ($kernel, $kernel_release, $uptime, $cpu_type, $mem_total, $mem_used, $mem) = @_;
        # Test Variables
        my ($up_time) = @_;


        ## Long Variables ##
        $uptime_long = `uptime`;
        $cpu_type_long = `sysctl machdep.cpu.brand_string`;
        $kernel_release_long = `sysctl kern.osrelease`;
        $mem_total_long = `sysctl hw.physmem`;
        $mem_used_long = `sysctl hw.usermem`;

        ## Final Variables ##

        # CPU
        $cpu_type = $cpu_type_long;
        $cpu_type = substr($cpu_type, 0, -1);
        $cpu_type = substr($cpu_type, 26);
        $cpu_type = "[CPU] " . $cpu_type; 

        # Kernel
        $kernel_release = $kernel_release_long;
        $kernel_release = substr($kernel_release, 0, -1);
        $kernel_release = substr($kernel_release, 17);
        $kernel = " [Kernel] Darwin " . $kernel_release;

        # Memory Used/Total
        $mem_total = $mem_total_long;
        $mem_total = substr($mem_total, 0, -1);
        $mem_total = substr($mem_total, 12);
        $mem_total = $mem_total / 1024 / 1024;
        $mem_total = sprintf("%.0f", $mem_total);

        $mem_used = $mem_used_long;
        $mem_used = substr($mem_used, 0, -1);
        $mem_used = substr($mem_used, 12);
        $mem_used = $mem_used / 1024 / 1024;
        $mem_used = sprintf("%.0f", $mem_used);

        $mem = " [RAM] " . $mem_used . " MB/" . $mem_total . " MB";

        ## Irssi Commands ##
        $server->command("/msg #tester ". $cpu_type . $kernel . $mem);
}

command_bind sysinfo => \&subSysinfo;