struct Button {
Manager *manager;
+ sd_event_source *event_source;
+
char *name;
char *seat;
int fd;
Button* button_new(Manager *m, const char *name);
void button_free(Button*b);
int button_open(Button *b);
-int button_process(Button *b);
int button_recheck(Button *b);
int button_set_seat(Button *b, const char *sn);