pfSense

<?

function cpu_usage() {

	return get_cpuusage(get_cputicks(), get_cputicks());

}

function get_uptime() {

	exec("/sbin/sysctl -n kern.boottime", $boottime);

	preg_match("/sec = (\d+)/", $boottime[0], $matches);

	$boottime = $matches[1];

	$uptime = time() - $boottime;

	if ($uptime > 60)

		$uptime += 30;

	$updays = (int)($uptime / 86400);

	$uptime %= 86400;

	$uphours = (int)($uptime / 3600);

	$uptime %= 3600;

	$upmins = (int)($uptime / 60);

	$uptimestr = "";

	if ($updays > 1)

		$uptimestr .= "$updays days, ";

	else if ($updays > 0)

		$uptimestr .= "1 day, ";

	$uptimestr .= sprintf("%02d:%02d", $uphours, $upmins);

	return $uptimestr;

}

function get_cputicks() {

	sleep(5);

	$cputicks = explode(" ", `/sbin/sysctl -n kern.cp_time`);

	return $cputicks;

}

function get_cpuusage($cpuTicks, $cpuTicks2) {

	$diff = array();

	$diff['user'] = ($cpuTicks2[0] - $cpuTicks[0]);

	$diff['nice'] = ($cpuTicks2[1] - $cpuTicks[1]);

	$diff['sys'] = ($cpuTicks2[2] - $cpuTicks[2]);

	$diff['intr'] = ($cpuTicks2[3] - $cpuTicks[3]);

	$diff['idle'] = ($cpuTicks2[4] - $cpuTicks[4]);

	//echo "<!-- user: {$diff['user']}  nice {$diff['nice']}  sys {$diff['sys']}  intr {$diff['intr']}  idle {$diff['idle']} -->";

	$totalDiff = $diff['user'] + $diff['nice'] + $diff['sys'] + $diff['intr'] + $diff['idle'];

	$totalused = $diff['user'] + $diff['nice'] + $diff['sys'] + $diff['intr'];

		if (isset($totalused)&&$totalused <= 0) {

			$totalused = 0.001;

		}

	$cpuUsage = floor(100 * ($totalused / $totalDiff));

	return $cpuUsage;

}

function get_pfstate() {

	global $config;

        if (isset($config['system']['maximumstates']) and $config['system']['maximumstates'] > 0)

                $maxstates="/{$config['system']['maximumstates']}";

        else

                $maxstates="/10000";

        $curentries = `/sbin/pfctl -si |grep current`;

        if (preg_match("/([0-9]+)/", $curentries, $matches)) {

             $curentries = $matches[1];

        }

        return $curentries . $maxstates;

}

function disk_usage()

{

	exec("df -h | grep -w '/' | awk '{ print $5 }' | cut -d '%' -f 1", $dfout);

	$diskusage = trim($dfout[0]);

	return $diskusage;

}

function swap_usage()

{

	$swapUsage = `/usr/sbin/swapinfo | cut -c45-55 | grep "%"`;

	$swapUsage = ereg_replace('%', "", $swapUsage);

	$swapUsage = ereg_replace(' ', "", $swapUsage);

	$swapUsage = rtrim($swapUsage);

	return $swapUsage;

}

function mem_usage()

{

	exec("/sbin/sysctl -n vm.stats.vm.v_active_count vm.stats.vm.v_inactive_count " .

		"vm.stats.vm.v_wire_count vm.stats.vm.v_cache_count vm.stats.vm.v_free_count", $memory);

	$totalMem = $memory[0] + $memory[1] + $memory[2] + $memory[3] + $memory[4];

	$freeMem = $memory[4];

	$usedMem = $totalMem - $freeMem;

	$memUsage = round(($usedMem * 100) / $totalMem, 0);

	return $memUsage;

}