Resque\Worker::killChild PHP Method

    public function killChild()
    {
        if (is_null($this->child)) {
            return;
        }
        if ($this->child === 0) {
            throw new Exception\Shutdown('Job forced shutdown');
        }
        Event::fire(Event::WORKER_KILLCHILD, array($this, $this->child));
        if (posix_kill($this->child, 0)) {
            $this->log('Killing child process at pid:' . $this->child, Logger::DEBUG);
            posix_kill($this->child, SIGTERM);
        }
        $this->child = null;
    }