Function ttydev_leave

components/lwp/terminal/freebsd/tty.c:214–253

}

static void ttydev_leave(struct lwp_tty *tp)
{
    tty_assert_locked(tp);

    if (tty_opened(tp) || tp->t_flags & TF_OPENCLOSE)
    {
        /* Device is still opened somewhere. */
        tty_unlock(tp);
        return;
    }

    tp->t_flags |= TF_OPENCLOSE;

    /* Remove console TTY. */
    constty_clear(tp);

    /* Drain any output. */
    if (!tty_gone(tp))
        tty_drain(tp, 1);

    ttydisc_close(tp);

    /* Free i/o queues now since they might be large. */
    ttyinq_free(&tp->t_inq);
    tp->t_inlow = 0;
    ttyoutq_free(&tp->t_outq);
    tp->t_outlow = 0;

#ifdef USING_BSD_KNOTE
    knlist_clear(&tp->t_inpoll.si_note, 1);
    knlist_clear(&tp->t_outpoll.si_note, 1);
#endif

    if (!tty_gone(tp))
        ttydevsw_close(tp);

    tp->t_flags &= ~TF_OPENCLOSE;
    cv_broadcast(&tp->t_dcdwait);
    tty_rel_free(tp);
}

/*
 * Operations that are exposed through the character device in /dev.