Function tty_is_ctty

freebsd/kern/tty.c:414–421

}

static __inline int
tty_is_ctty(struct tty *tp, struct proc *p)
{

	tty_assert_locked(tp);

	return (p->p_session == tp->t_session && p->p_flag & P_CONTROLT);
}

int
tty_wait_background(struct tty *tp, struct thread *td, int sig)