bsd/kern/tty.c

369 	    tp->t_session == NULL ) {	/* and tty not controlling */
379 			oldsess = tp->t_session;
382 			tp->t_session = sessp;
452 	oldsessp = tp->t_session;
454 	tp->t_session = NULL;
1391 		    ((sessp->s_ttyvp || tp->t_session) &&
1392 		    (tp->t_session != sessp))) {
1404 		oldsessp = tp->t_session;
1409 		tp->t_session = sessp;
1880 			if (tp->t_session && tp->t_session->s_leader)
1881 				psignal(tp->t_session->s_leader, SIGHUP);
2794 	if (tp->t_session == NULL) {
3119 	return (tp->t_session != NULL && p->p_pgrp != NULL && (p->p_pgrp != tp->t_pgrp) && isctty_sp(p, tp, p->p_pgrp->pg_session));
3129 	retval = (sessp == tp->t_session && p->p_flag & P_CONTROLT);
3137 	return(sessp == tp->t_session && p->p_flag & P_CONTROLT);