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

<?php

if (is_file(\LibreNMS\Config::get('install_dir') . '/includes/polling/os/' . $device['os'] . '.inc.php')) {
    // OS Specific
    include \LibreNMS\Config::get('install_dir') . '/includes/polling/os/' . $device['os'] . '.inc.php';
} elseif ($device['os_group'] && is_file(\LibreNMS\Config::get('install_dir') . '/includes/polling/os/' . $device['os_group'] . '.inc.php')) {
    // OS Group Specific
    include \LibreNMS\Config::get('install_dir') . '/includes/polling/os/' . $device['os_group'] . '.inc.php';
} else {
    echo "Generic :(\n";
}

if ($device['version'] != $version) {
    $update_array['version'] = $version;
    log_event('OS Version -> ' . $version, $device, 'system', 3);
}

if ($features != $device['features']) {
    $update_array['features'] = $features;
    log_event('OS Features -> ' . $features, $device, 'system', 3);
}

if ($hardware != $device['hardware']) {
    $update_array['hardware'] = $hardware;
    log_event('Hardware -> ' . $hardware, $device, 'system', 3);
}

if ($serial != $device['serial']) {
    $update_array['serial'] = $serial;
    log_event('Serial -> ' . $serial, $device, 'system', 3);
}

update_device_logo($device);

echo 'Hardware: ' . $hardware . PHP_EOL;
echo 'Version: ' . $version . PHP_EOL;
echo 'Features: ' . $features . PHP_EOL;
echo 'Serial: ' . $serial . PHP_EOL;