/**
* Child process signal handler
*/
public function childSignalHandler($signo, $pid = null, $status = null)
{
// If no pid is provided, that means we're getting the signal from the system. Let's figure out
// which child process ended
if ($pid === null) {
$pid = pcntl_waitpid(-1, $status, WNOHANG);
}
//Make sure we get all of the exited children
while ($pid > 0) {
if ($pid && isset($this->runningOperations[$pid])) {
$exitCode = pcntl_wexitstatus($status);
if ($exitCode != 0) {
Output::instance()->write("Process of operation " . $this->runningOperations[$pid]->hash . " exited with status {$exitCode}");
// this is required as the MySQL connection might be closed anytime by a fork
// this method is asynchronous, and might be triggered by any signal
// the only way is to use a dedicated DB connection, and close it afterwards
$this->closeDatabaseConnection();
$this->runningOperations[$pid]->reset();
$this->closeDatabaseConnection();
}
unset($this->runningOperations[$pid]);
} elseif ($pid) {
$this->signalQueue[$pid] = $status;
}
$pid = pcntl_waitpid(-1, $status, WNOHANG);
}
return true;
}
#!/usr/bin/env php
<?php
use mm\Daemon\Daemon;
use mm\Daemon\Output;
define('DAEMON_MODE', true);
include 'config.php';
// check if media target folder is writeable
$storageDir = '/media/aggregateshares/';
if (!is_writeable($storageDir)) {
echo "{$storageDir} can not be written to. Wrong user maybe ?\n";
die;
}
$daemon = new Daemon();
if (DAEMON_MODE) {
$out = new Output(STDOUT);
declare (ticks=1);
// Trap signals that we expect to recieve
pcntl_signal(SIGCHLD, array($daemon, 'childHandler'));
pcntl_signal(SIGUSR1, array($daemon, 'childHandler'));
pcntl_signal(SIGALRM, array($daemon, 'childHandler'));
$pid = pcntl_fork();
if ($pid < 0) {
error_log("unable to fork daemon");
$out->write("ERROR: unable to fork daemon)");
exit(1);
}
/* If we got a good PID, then we can exit the parent process. */
if ($pid > 0) {
// Wait for confirmation from the child via SIGTERM or SIGCHLD, or
// for two seconds to elapse (SIGALRM). pause() should not return. */
pcntl_alarm(2);
