Packages: gio-2.0
D-Bus

Program: client

async void run () {
	try {
		var bus = yield Bus.@get (BusType.SESSION);
		dynamic DBusProxy test = yield new DBusProxy (bus, DBusProxyFlags.NONE, null, bus.get_unique_name (), "/org/example/test", "org.example.Test");
		string s;
		int i = test.do_foo (42, out s);
		assert (i == 23);
		assert (s == "foo");
	} catch {
	}

	main_loop.quit ();
}

MainLoop main_loop;

void main () {
	main_loop = new MainLoop ();
	run.begin ();
	main_loop.run ();
}

Program: server

[DBus (name = "org.example.Test")]
class Test : Object {
	public int do_foo (int i, out string s) throws Error {
		assert (i == 42);
		s = "foo";
		return 23;
	}
}

MainLoop main_loop;

void client_exit (Pid pid, int status) {
	// client finished, terminate server
	assert (status == 0);
	main_loop.quit ();
}

void main () {
	var conn = Bus.get_sync (BusType.SESSION);
	conn.register_object ("/org/example/test", new Test ());

	// try to register service in session bus
	var request_result = conn.call_sync ("org.freedesktop.DBus", "/org/freedesktop/DBus", "org.freedesktop.DBus", "RequestName",
	                                      new Variant ("(su)", "org.example.Test", 0x4), null, 0, -1);
	assert ((uint) request_result.get_child_value (0) == 1);

	// server ready, spawn client
	Pid client_pid;
	Process.spawn_async (null, { "dbus_dynamic_method_client" }, null, SpawnFlags.DO_NOT_REAP_CHILD, null, out client_pid);
	ChildWatch.add (client_pid, client_exit);

	main_loop = new MainLoop ();
	main_loop.run ();
}