pfSense

/*

 * get_sysctl($names)

 * Get values of sysctl OID's listed in $names (accepts an array or a single

 * name) and return an array of key/value pairs set for those that exist

 */

function get_sysctl($names) {

	if (empty($names))

		return array();

	if (is_array($names)) {

		$name_list = array();

		foreach ($names as $name) {

			$name_list[] = escapeshellarg($name);

		}

	} else

		$name_list = array(escapeshellarg($names));

	exec("/sbin/sysctl -i " . implode(" ", $name_list), $output);

	$values = array();

	foreach ($output as $line) {

		$line = explode(": ", $line, 2);

		if (count($line) == 2)

			$values[$line[0]] = $line[1];

	}

	return $values;

}

/*

 * set_sysctl($value_list)

 * Set sysctl OID's listed as key/value pairs and return

 * an array with keys set for those that succeeded

 */

function set_sysctl($values) {

	if (empty($values))

		return array();

	$value_list = array();

	foreach ($values as $key => $value) {

		$value_list[] = escapeshellarg($key) . "=" . escapeshellarg($value);

	}

	exec("/sbin/sysctl -i " . implode(" ", $value_list), $output, $success);

	/* Retry individually if failed (one or more read-only) */

	if ($success <> 0 && count($value_list) > 1) {

		foreach ($value_list as $value) {

			exec("/sbin/sysctl -i " . $value, $output);

		}

	}

	$ret = array();

	foreach ($output as $line) {

		$line = explode(": ", $line, 2);

		if (count($line) == 2)

			$ret[$line[0]] = true;

	}

	return $ret;

}