Aerys\WatcherProcess::bindCommandServer PHP Method

    private function bindCommandServer(string $config)
    {
        $path = CommandClient::socketPath(Bootstrapper::selectConfigFile($config));
        $unix = in_array("unix", \stream_get_transports(), true);
        if ($unix) {
            $path .= ".sock";
            $socketAddress = "unix://{$path}";
        } else {
            $socketAddress = "tcp://127.0.0.1:*";
        }
        if ((yield \Amp\file\exists($path))) {
            if (is_resource(@stream_socket_client($unix ? $socketAddress : (yield \Amp\file\get($path))))) {
                throw new \RuntimeException("Aerys is already running, can't start it again");
            } elseif ($unix) {
                (yield \Amp\file\unlink($path));
            }
        }
        if (!($commandServer = @stream_socket_server($socketAddress, $errno, $errstr))) {
            throw new \RuntimeException(sprintf("Failed binding socket server on {$socketAddress}: [%d] %s", $errno, $errstr));
        }
        stream_set_blocking($commandServer, false);
        \Amp\onReadable($commandServer, function (...$args) {
            $this->acceptCommand(...$args);
        });
        register_shutdown_function(function () use($path) {
            @\unlink($path);
        });
        if (!$unix) {
            (yield \Amp\file\put($path, stream_socket_get_name($commandServer, $wantPeer = false)));
        }
    }