librenms-librenms/includes/polling/toner.inc.php

<?php

if ($config['enable_printers']) {
    $toner_data = dbFetchRows('SELECT * FROM toner WHERE device_id = ?', array($device['device_id']));

    foreach ($toner_data as $toner) {
        echo 'Checking toner '.$toner['toner_descr'].'... ';

        if ($toner['toner_capacity_oid']) {
            // FIXME this if can go on 1-Sep-2012
            $toner['toner_capacity'] = snmp_get($device, $toner['toner_capacity_oid'], '-OUqnv');
        }

        $tonerperc = round((snmp_get($device, $toner['toner_oid'], '-OUqnv') / $toner['toner_capacity'] * 100));

        $old_tonerrrd = $config['rrd_dir'].'/'.$device['hostname'].'/'.safename('toner-'.$toner['toner_descr'].'.rrd');
        $tonerrrd     = $config['rrd_dir'].'/'.$device['hostname'].'/'.safename('toner-'.$toner['toner_index'].'.rrd');

        if (!is_file($tonerrrd) && is_file($old_tonerrrd)) {
            rename($old_tonerrrd, $tonerrrd);
        }

        if (!is_file($tonerrrd)) {
            rrdtool_create(
                $tonerrrd,
                '--step 300 
                DS:toner:GAUGE:600:0:20000 '.$config['rrd_rra']
            );
        }

        echo $tonerperc." %\n";

        $fields = array(
            'toner' => $tonerperc,
        );

        rrdtool_update($tonerrrd, $fields);

        // FIXME should report for toner out... :)
        // Log toner swap
        if ($tonerperc > $toner['toner_current']) {
            log_event('Toner '.$toner['toner_descr'].' was replaced (new level: '.$tonerperc.'%)', $device, 'toner', $toner['toner_id']);
        }

        dbUpdate(array('toner_current' => $tonerperc, 'toner_capacity' => $toner['toner_capacity']), 'toner', '`toner_id` = ?', array($toner['toner_id']));
    }//end foreach
}//end if