gboolean g_dbus_request_name(DBusConnection *connection, const char *name,
DBusError *error);
-gboolean g_dbus_check_service(DBusConnection *connection, const char *name);
-
gboolean g_dbus_set_disconnect_function(DBusConnection *connection,
GDBusWatchFunction function,
void *user_data, DBusFreeFunction destroy);