cron.php

<?php
/**
 * ownCloud
 *
 * @author Jakob Sack
 * @copyright 2012 Jakob Sack owncloud@jakobsack.de
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

// Unfortunately we need this class for shutdown function
class TemporaryCronClass {
	public static $sent = false;
	public static $lockfile = "";
	public static $keeplock = false;
}

// We use this function to handle (unexpected) shutdowns
function handleUnexpectedShutdown() {
	// Delete lockfile
	if (!TemporaryCronClass::$keeplock && file_exists(TemporaryCronClass::$lockfile)) {
		unlink(TemporaryCronClass::$lockfile);
	}

	// Say goodbye if the app did not shutdown properly
	if (!TemporaryCronClass::$sent) {
		if (OC::$CLI) {
			echo 'Unexpected error!' . PHP_EOL;
		} else {
			OC_JSON::error(array('data' => array('message' => 'Unexpected error!')));
		}
	}
}

try {

	require_once 'lib/base.php';

	// load all apps to get all api routes properly setup
	OC_App::loadApps();

	\OC::$session->close();

	$logger = \OC_Log::$object;

	// Don't do anything if ownCloud has not been installed
	if (!OC_Config::getValue('installed', false)) {
		exit(0);
	}

	// Handle unexpected errors
	register_shutdown_function('handleUnexpectedShutdown');

	// Delete temp folder
	OC_Helper::cleanTmpNoClean();

	// Exit if background jobs are disabled!
	$appmode = OC_BackgroundJob::getExecutionType();