#!/usr/bin/env php
<?php

// A small script to grab the NTP Client statistics from a NTPD server
// Needed commands: php, ntpd, ntpq
//
// Install:
// Add the following to your snmpd.conf file:
// extend ntpclient /opt/librenms/scripts/ntp-client.php
//
// Version 1.1 By:
// All In One - Dennis de Houx <info@all-in-one.be>
//

// START SETTINGS ///
$ntpq = '/usr/sbin/ntpq';
// Change this to true if you have clk_jitter, sys_jitter in the ntpq -c rv output
$newstats_style = false;
// END SETTINGS ///

// DO NOT EDIT UNDER THIS LINE

$cmd = shell_exec($ntpq." -c rv | grep '^offset'");
if ($newstats_style) {
    $cmd2 = shell_exec($ntpq." -c rv | grep '^clk_wander'");
}
else {
    $cmd2 = shell_exec($ntpq." -c rv | grep '^stability'");
}

$vars  = array();
$vars2 = array();
$vars  = explode(',', $cmd);
$vars2 = explode(',', $cmd2);


function doSNMPv2($vars, $vars2, $newstats_style)
{
    $ntp = array();
    foreach ($vars as $item => $value) {
        if (!empty($value)) {
            $temp = explode('=', $value);
            if (isset($temp[1])) {
                $ntp[trim($temp[0])] = trim($temp[1]);
            }
        }
    }

    foreach ($vars2 as $item => $value) {
        if (!empty($value)) {
            $temp = explode('=', $value);
            if (isset($temp[1])) {
                $ntp[trim($temp[0])] = trim($temp[1]);
            }
        }
    }

    $var          = array();
    $var['offset']    = (isset($ntp['offset']) ? $ntp['offset'] : 'U');
    $var['frequency'] = (isset($ntp['frequency']) ? $ntp['frequency'] : 'U');
    if ($newstats_style) {
        $var['jitter']    = (isset($ntp['clk_jitter']) ? $ntp['clk_jitter'] : 'U');
        $var['noise']     = (isset($ntp['sys_jitter']) ? $ntp['sys_jitter'] : 'U');
        $var['stability'] = (isset($ntp['clk_wander']) ? $ntp['clk_wander'] : 'U');
    }
    else {
        $var['jitter']    = (isset($ntp['jitter']) ? $ntp['jitter'] : 'U');
        $var['noise']     = (isset($ntp['noise']) ? $ntp['noise'] : 'U');
        $var['stability'] = (isset($ntp['stability']) ? $ntp['stability'] : 'U');
    }

    foreach ($var as $item => $count) {
        echo $count."\n";
    }

}//end doSNMPv2()


doSNMPv2($vars, $vars2, $newstats_style);