int seat_switch_to_previous(Seat *s);
int seat_active_vt_changed(Seat *s, unsigned int vtnr);
int seat_read_active_vt(Seat *s);
-int seat_preallocate_vts(Seat *s);
+// UNNEEDED int seat_preallocate_vts(Seat *s);
int seat_attach_session(Seat *s, Session *session);
void seat_complete_switch(Seat *s);