dbus_g_proxy_add_signal (priv->proxy,"DeviceAdded", DBUS_TYPE_G_OBJECT_PATH, G_TYPE_INVALID);dbus_g_proxy_connect_signal(priv->proxy,"DeviceAdded", G_CALLBACK (modem_added), self,NULL); dbus_g_proxy_add_signal (priv->proxy,"DeviceRemoved", DBUS_TYPE_G_OBJECT_PATH, G_TYPE_INVALID...