/**
* Fork the process into two
* You can create an optional method called preFork() which is called before the fork
* Also an optional method called postFork() which is called after the fork on any remaining processes
* (ie if you choose to daemonize then the original foreground process will not call the postFork() method)
*
* @param bool $daemonize kill the parent (original) process and let the new child run
*
* @return void
*/
protected function fork($daemonize = false)
{
if ($this->node !== 0) {
return false;
}
// call any user created preFork method
if (method_exists($this, 'preFork')) {
$this->preFork();
}
// force Propel to close connections so that it will reconnect on next query
if (class_exists('\\Propel')) {
\Propel::close();
}
$pid = pcntl_fork();
switch ($pid) {
case -1:
Logger::emergency('Unable to fork process');
return;
case 0:
// this is the child
$this->node++;
break;
default:
// we are the original process
if ($this->node == 0) {
\Cli\line('Child node : pid=%y%s%n', $pid);
if ($daemonize) {
// exit;
} else {
$this->pid[] = $pid;
}
return;
}
}
// promote the daemon process so it doesn't die because the parent has
if ($daemonize && posix_setsid() === -1) {
Logger::critical('Error creating daemon as session leader');
exit(1);
}
fclose(STDIN);
fclose(STDOUT);
fclose(STDERR);
$this->stdIn = fopen('/dev/null', 'r');
// set fd/0
$this->stdOut = fopen('/dev/null', 'w');
// set fd/1
$this->stdErr = fopen('php://stdout', 'w');
// a hack to duplicate fd/1 to 2
// Silence any console output from the logger
Logger::setSilentConsole(true);
// call any user created postFork method
if (method_exists($this, 'postFork')) {
$this->postFork();
}
}
/**
* Daemonises the process
*/
protected function fork_to_bg()
{
$daemon_pid = pcntl_fork();
switch ($daemon_pid) {
case -1:
Logger::emergency('Unable to fork daemon process');
exit(1);
// fork failed
// fork failed
case 0:
// this child is our daemon
$this->process_pid = getmypid();
break;
default:
// we are the parent - the one from the FG command line
// return control to command line by exiting...
\Cli\line('Daemon process running : pid=%y' . $daemon_pid . '%n');
exit(0);
}
// promote the daemon process so it doesn't die because the parent has
if (posix_setsid() === -1) {
Logger::critical('Error creating daemon as session leader');
exit(1);
}
fclose(STDIN);
fclose(STDOUT);
fclose(STDERR);
$this->_stdIn = fopen('/dev/null', 'r');
// set fd/0
$this->_stdOut = fopen('/dev/null', 'w');
// set fd/1
$this->_stdErr = fopen('php://stdout', 'w');
// a hack to duplicate fd/1 to 2
// Silence any console output from the logger
Logger::setSilentConsole(true);
Logger::notice('Daemon process running : pid=' . getmypid());
}