extern int jbus_start_serving(struct jbus *jbus);
extern int jbus_send_signal_s(struct jbus *jbus, const char *name, const char *content);
extern int jbus_send_signal_j(struct jbus *jbus, const char *name, struct json_object *content);
extern int jbus_start_serving(struct jbus *jbus);
extern int jbus_send_signal_s(struct jbus *jbus, const char *name, const char *content);
extern int jbus_send_signal_j(struct jbus *jbus, const char *name, struct json_object *content);