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 int ustcomm_init_app(pid_t pid, struct ustcomm_app *handle);
extern void ustcomm_fini_app(struct ustcomm_app *handle, int keep_socket_file);