int ttflush(TTY tp, int mode)
{
if (mode & 1)
{
qflush(&tp->inq);
}
if (mode & 2)
{
BCLR(tp->state, ST_STOPPED);
ptsstop(tp,mode);
qflush(&tp->outq);
if (ISSET(tp->state,ST_DRAIN))
{
BCLR(tp->state, ST_DRAIN);
Run(&tp->outq);
}
}
return RPDONE;
}
static int
ptsclose(struct dev_close_args *ap)
{
cdev_t dev = ap->a_head.a_dev;
struct tty *tp;
struct pt_ioctl *pti = dev->si_drv1;
int err;
lwkt_gettoken(&tty_token);
if (pti_hold(pti))
panic("ptsclose on terminated pti");
/*
* Disconnect the slave side
*/
tp = dev->si_tty;
err = (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
ptsstop(tp, FREAD|FWRITE);
ttyclose(tp); /* clears t_state */
/*
* Mark the pts side closed and signal the ptc. Do not mark the
* tty a zombie... that is, allow the tty to be re-opened as long
* as the ptc is still open. The ptc will read() EOFs until the
* pts side is reopened or the ptc is closed.
*
* xterm() depends on this behavior as it will revoke() the pts
* and then reopen it after the (unnecessary old code) chmod.
*/
pti->pt_flags &= ~PF_SOPEN;
pti->pt_flags |= PF_SCLOSED;
if (tp->t_oproc)
ptcwakeup(tp, FREAD);
pti_done(pti);
lwkt_reltoken(&tty_token);
return (err);
}
