Function ttydev_close

components/lwp/terminal/freebsd/tty.c:373–412

}

static int ttydev_close(struct lwp_tty *tp, int fflag, int devtype __unused,
                        struct rt_thread *td __unused)
{
    rt_device_t dev = &tp->parent;

    tty_lock(tp);

    /*
     * Don't actually close the device if it is being used as the
     * console.
     */
    MPASS((tp->t_flags & (TF_OPENED_CONS | TF_OPENED_IN)) == 0 ||
          (tp->t_flags & TF_OPENED_OUT) == 0);
    if (dev == dev_console)
        tp->t_flags &= ~TF_OPENED_CONS;
    else
        tp->t_flags &= ~(TF_OPENED_IN | TF_OPENED_OUT);

    if (tp->t_flags & TF_OPENED)
    {
        tty_unlock(tp);
        return 0;
    }

    /* If revoking, flush output now to avoid draining it later. */
    if (fflag & FREVOKE)
        tty_flush(tp, FWRITE);

    tp->t_flags &= ~TF_EXCLUDE;

    /* Properly wake up threads that are stuck - revoke(). */
    tp->t_revokecnt++;
    tty_wakeup(tp, FREAD | FWRITE);
    cv_broadcast(&tp->t_bgwait);
    cv_broadcast(&tp->t_dcdwait);

    ttydev_leave(tp);

    return 0;
}

int tty_wait_background(struct lwp_tty *tp, struct rt_thread *td, int sig)
{