-DBusHandlerResult bus_default_message_handler(Manager *m, DBusMessage *message, const char* introspection, const BusProperty *properties);
+DBusHandlerResult bus_default_message_handler(Manager *m, DBusConnection *c, DBusMessage *message, const char* introspection, const BusProperty *properties);
+DBusHandlerResult bus_send_error_reply(Manager *m, DBusConnection *c, DBusMessage *message, DBusError *bus_error, int error);