+//int send_message_pid(pid_t pid, const char *msg, char **reply);
+extern int ustcomm_request_consumer(pid_t pid, const char *channel);
+
+extern int ustcomm_ustd_recv_message(struct ustcomm_ustd *ustd, char **msg, struct ustcomm_source *src, int timeout);
+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, int keep_socket_file);
+extern void ustcomm_fini_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_close_app(struct ustcomm_connection *conn);
+extern int ustcomm_connect_path(const char *path, struct ustcomm_connection *conn, pid_t signalpid);
+extern int ustcomm_send_request(struct ustcomm_connection *conn, const char *req, char **reply);
+extern int ustcomm_send_reply(struct ustcomm_server *server, char *msg, struct ustcomm_source *src);
+extern int ustcomm_disconnect(struct ustcomm_connection *conn);
+extern int ustcomm_close_all_connections(struct ustcomm_server *server);
+extern void ustcomm_mp_add_app_clients(struct mpentries *ent, struct ustcomm_app *app, int (*cb)(char *recvbuf, struct ustcomm_source *src));
+
+extern int nth_token_is(const char *str, const char *token, int tok_no);