extern int ustcomm_init_app(pid_t pid, struct ustcomm_app *handle);
-extern int ustcomm_init_ustd(struct ustcomm_ustd *handle);
+extern int ustcomm_init_ustd(struct ustcomm_ustd *handle, const char *sock_path);
extern int ustcomm_connect_app(pid_t pid, struct ustcomm_connection *conn);
extern int ustcomm_connect_path(const char *path, struct ustcomm_connection *conn, pid_t signalpid);