+int seat_apply_acls(Seat *s, Session *old_active);
+int seat_active_vt_changed(Seat *s, int vtnr);
+int seat_read_active_vt(Seat *s);
+
+int seat_start(Seat *s);
+int seat_stop(Seat *s);
+
+int seat_check_gc(Seat *s);
+void seat_add_to_gc_queue(Seat *s);
+