extern int ustcomm_app_recv_message(struct ustcomm_app *app, char **msg, struct ustcomm_source *src, int timeout);
extern int ustcomm_init_app(pid_t pid, struct ustcomm_app *handle);
+extern void ustcomm_fini_app(struct ustcomm_app *handle);
extern int ustcomm_init_ustd(struct ustcomm_ustd *handle, const char *sock_path);