PHPDaemon\Thread\Master::prepareSystemEnv PHP Method

    protected function prepareSystemEnv()
    {
        register_shutdown_function(function () {
            if ($this->pid != posix_getpid()) {
                return;
            }
            if ($this->shutdown === true) {
                return;
            }
            $this->log('Unexcepted shutdown.');
            $this->shutdown(SIGTERM);
        });
        posix_setsid();
        proc_nice(Daemon::$config->masterpriority->value);
        if (!Daemon::$config->verbosetty->value) {
            fclose(STDIN);
            fclose(STDOUT);
            fclose(STDERR);
        }
        $this->setTitle(Daemon::$runName . ': master process' . (Daemon::$config->pidfile->value !== Daemon::$config->pidfile->defaultValue ? ' (' . Daemon::$config->pidfile->value . ')' : ''));
    }