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<?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 my_temporary_cron_class {
public static $sent = false;
}

function handleUnexpectedShutdown() {
if( !my_temporary_cron_class::$sent ) {
if( OC::$CLI ) {
echo 'Unexpected error!'.PHP_EOL;
}
else{
OC_JSON::error( array( 'data' => array( 'message' => 'Unexpected error!')));
}
}
}

$RUNTIME_NOSETUPFS = true;
require_once 'lib/base.php';

// 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');

// Exit if background jobs are disabled!
$appmode = OC_Appconfig::getValue( 'core', 'backgroundjobs_mode', 'ajax' );
if( $appmode == 'none' ) {
my_temporary_cron_class::$sent = true;
if( OC::$CLI ) {
echo 'Background Jobs are disabled!'.PHP_EOL;
}
else{
OC_JSON::error( array( 'data' => array( 'message' => 'Background jobs disabled!')));
}
exit( 1 );
}

if( OC::$CLI ) {
if( $appmode != 'cron' ) {
OC_Appconfig::setValue( 'core', 'backgroundjobs_mode', 'cron' );
}

// check if backgroundjobs is still running
$pid = OC_Appconfig::getValue( 'core', 'backgroundjobs_pid', false );
if( $pid !== false ) {
// FIXME: check if $pid is still alive (*nix/mswin). if so then exit
}
// save pid
OC_Appconfig::setValue( 'core', 'backgroundjobs_pid', getmypid());

// Work
OC_BackgroundJob_Worker::doAllSteps();
}
else{
if( $appmode == 'cron' ){
OC_JSON::error( array( 'data' => array( 'message' => 'Backgroundjobs are using system cron!')));
}
else{
OC_BackgroundJob_Worker::doNextStep();
OC_JSON::success();
}
}
my_temporary_cron_class::$sent = true;
exit();
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