/**
 * Merge config function
 * @author f0o <[email protected]>
 * @copyright 2015 f0o, LibreNMS
 * @license GPL
 * @package LibreNMS
 * @subpackage Config
 */
function mergecnf($obj)
{
    $pointer = array();
    $val = $obj['config_value'];
    $obj = $obj['config_name'];
    $obj = explode('.', $obj, 2);
    if (!isset($obj[1])) {
        if (filter_var($val, FILTER_VALIDATE_INT)) {
            $val = (int) $val;
        } else {
            if (filter_var($val, FILTER_VALIDATE_FLOAT)) {
                $val = (double) $val;
            } else {
                if (filter_var($val, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE) !== null) {
                    $val = filter_var($val, FILTER_VALIDATE_BOOLEAN);
                }
            }
        }
        if (!empty($obj[0])) {
            return array($obj[0] => $val);
        } else {
            return array($val);
        }
    } else {
        $pointer[$obj[0]] = mergecnf(array('config_name' => $obj[1], 'config_value' => $val));
    }
    return $pointer;
}

<?php

// Observium Includes
require_once $config['install_dir'] . '/includes/dbFacile.php';
require_once $config['install_dir'] . '/includes/mergecnf.inc.php';
// Connect to database
$database_link = mysql_pconnect($config['db_host'], $config['db_user'], $config['db_pass']);
if (!$database_link) {
    echo '<h2>MySQL Error</h2>';
    echo mysql_error();
    die;
}
$database_db = mysql_select_db($config['db_name'], $database_link);
$clone = $config;
foreach (dbFetchRows('select config_name,config_value from config') as $obj) {
    $clone = array_replace_recursive($clone, mergecnf($obj));
}
$config = array_replace_recursive($clone, $config);
//
// NO CHANGES TO THIS FILE, IT IS NOT USER-EDITABLE   #
//
// YES, THAT MEANS YOU                   #
//
umask(02);
$config['os']['default']['over'][0]['graph'] = 'device_processor';
$config['os']['default']['over'][0]['text'] = 'Processor Usage';
$config['os']['default']['over'][1]['graph'] = 'device_mempool';
$config['os']['default']['over'][1]['text'] = 'Memory Usage';
$os_group = 'unix';
$config['os_group'][$os_group]['type'] = 'server';
$config['os_group'][$os_group]['processor_stacked'] = 1;