static void
ptsstop(struct tty *tp, int flush)
{
struct pt_ioctl *pti = tp->t_dev->si_drv1;
int flag;
lwkt_gettoken(&tty_token);
/* note: FLUSHREAD and FLUSHWRITE already ok */
if (pti) {
if (flush == 0) {
flush = TIOCPKT_STOP;
pti->pt_flags |= PF_STOPPED;
} else {
pti->pt_flags &= ~PF_STOPPED;
}
pti->pt_send |= flush;
/* change of perspective */
}
flag = 0;
if (flush & FREAD)
flag |= FWRITE;
if (flush & FWRITE)
flag |= FREAD;
ptcwakeup(tp, flag);
lwkt_reltoken(&tty_token);
}
int
ptsclose(dev_t dev, int flag, int mode, struct proc *p)
{
struct pt_softc *pti = pt_softc[minor(dev)];
struct tty *tp = pti->pt_tty;
int error;
error = (*linesw[tp->t_line].l_close)(tp, flag);
error |= ttyclose(tp);
ptcwakeup(tp, FREAD|FWRITE);
return (error);
}
/*
* Start output on pseudo-tty.
* Wake up process polling or sleeping for input from controlling tty.
*/
void
ptsstart(struct tty *tp)
{
struct pt_softc *pti = pt_softc[minor(tp->t_dev)];
if (tp->t_state & TS_TTSTOP)
return;
if (pti->pt_flags & PF_STOPPED) {
pti->pt_flags &= ~PF_STOPPED;
pti->pt_send = TIOCPKT_START;
}
ptcwakeup(tp, FREAD);
}
int
ptsread(dev_t dev, struct uio *uio, int flag)
{
struct proc *p = curproc;
struct process *pr = p->p_p;
struct pt_softc *pti = pt_softc[minor(dev)];
struct tty *tp = pti->pt_tty;
int error = 0;
again:
if (pti->pt_flags & PF_REMOTE) {
while (isbackground(pr, tp)) {
if ((p->p_sigacts->ps_sigignore & sigmask(SIGTTIN)) ||
(p->p_sigmask & sigmask(SIGTTIN)) ||
pr->ps_pgrp->pg_jobc == 0 ||
pr->ps_flags & PS_PPWAIT)
return (EIO);
pgsignal(pr->ps_pgrp, SIGTTIN, 1);
error = ttysleep(tp, &lbolt,
TTIPRI | PCATCH, ttybg, 0);
if (error)
return (error);
}
if (tp->t_canq.c_cc == 0) {
if (flag & IO_NDELAY)
return (EWOULDBLOCK);
error = ttysleep(tp, &tp->t_canq,
TTIPRI | PCATCH, ttyin, 0);
if (error)
return (error);
goto again;
}
while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0)
if (ureadc(getc(&tp->t_canq), uio) < 0) {
error = EFAULT;
break;
}
if (tp->t_canq.c_cc == 1)
(void) getc(&tp->t_canq);
if (tp->t_canq.c_cc)
return (error);
} else
if (tp->t_oproc)
error = (*linesw[tp->t_line].l_read)(tp, uio, flag);
ptcwakeup(tp, FWRITE);
return (error);
}
/*
* Start output on pseudo-tty.
* Wake up process selecting or sleeping for input from controlling tty.
*/
static void
ptsstart(struct tty *tp)
{
lwkt_gettoken(&tty_token);
struct pt_ioctl *pti = tp->t_dev->si_drv1;
if (tp->t_state & TS_TTSTOP) {
lwkt_reltoken(&tty_token);
return;
}
if (pti) {
if (pti->pt_flags & PF_STOPPED) {
pti->pt_flags &= ~PF_STOPPED;
pti->pt_send = TIOCPKT_START;
}
}
ptcwakeup(tp, FREAD);
lwkt_reltoken(&tty_token);
}
/*ARGSUSED*/
int
ptsopen(dev_t dev, int flag, int devtype, struct proc *p)
{
struct pt_softc *pti;
struct tty *tp;
int error;
if ((error = check_pty(minor(dev))))
return (error);
pti = pt_softc[minor(dev)];
if (!pti->pt_tty) {
tp = pti->pt_tty = ttymalloc();
} else
tp = pti->pt_tty;
if ((tp->t_state & TS_ISOPEN) == 0) {
tp->t_state |= TS_WOPEN;
ttychars(tp); /* Set up default chars */
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_lflag = TTYDEF_LFLAG;
tp->t_cflag = TTYDEF_CFLAG;
tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
ttsetwater(tp); /* would be done in xxparam() */
} else if (tp->t_state&TS_XCLUDE && p->p_ucred->cr_uid != 0)
return (EBUSY);
if (tp->t_oproc) /* Ctrlr still around. */
tp->t_state |= TS_CARR_ON;
while ((tp->t_state & TS_CARR_ON) == 0) {
tp->t_state |= TS_WOPEN;
if (flag&FNONBLOCK)
break;
error = ttysleep(tp, &tp->t_rawq, TTIPRI | PCATCH,
ttopen, 0);
if (error)
return (error);
}
error = (*linesw[tp->t_line].l_open)(dev, tp);
ptcwakeup(tp, FREAD|FWRITE);
return (error);
}
int
ptsstop(struct tty *tp, int flush)
{
struct pt_softc *pti = pt_softc[minor(tp->t_dev)];
int flag;
/* note: FLUSHREAD and FLUSHWRITE already ok */
if (flush == 0) {
flush = TIOCPKT_STOP;
pti->pt_flags |= PF_STOPPED;
} else
pti->pt_flags &= ~PF_STOPPED;
pti->pt_send |= flush;
/* change of perspective */
flag = 0;
if (flush & FREAD)
flag |= FWRITE;
if (flush & FWRITE)
flag |= FREAD;
ptcwakeup(tp, flag);
return 0;
}
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);
}
/*ARGSUSED*/
int
ptyioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
{
struct pt_softc *pti = pt_softc[minor(dev)];
struct tty *tp = pti->pt_tty;
u_char *cc = tp->t_cc;
int stop, error;
/*
* IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG.
* ttywflush(tp) will hang if there are characters in the outq.
*/
if (cmd == TIOCEXT) {
/*
* When the EXTPROC bit is being toggled, we need
* to send an TIOCPKT_IOCTL if the packet driver
* is turned on.
*/
if (*(int *)data) {
if (pti->pt_flags & PF_PKT) {
pti->pt_send |= TIOCPKT_IOCTL;
ptcwakeup(tp, FREAD);
}
tp->t_lflag |= EXTPROC;
} else {
if ((tp->t_lflag & EXTPROC) &&
(pti->pt_flags & PF_PKT)) {
pti->pt_send |= TIOCPKT_IOCTL;
ptcwakeup(tp, FREAD);
}
tp->t_lflag &= ~EXTPROC;
}
return(0);
} else if (cdevsw[major(dev)].d_open == ptcopen)
switch (cmd) {
case TIOCGPGRP:
#ifdef COMPAT_SUNOS
{
/*
* I'm not sure about SunOS TIOCGPGRP semantics
* on PTYs, but it's something like this:
*/
extern struct emul emul_sunos;
if (p->p_emul == &emul_sunos) {
if (tp->t_pgrp == 0)
return (EIO);
*(int *)data = tp->t_pgrp->pg_id;
return (0);
}
}
#endif
/*
* We avoid calling ttioctl on the controller since,
* in that case, tp must be the controlling terminal.
*/
*(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0;
return (0);
case TIOCPKT:
if (*(int *)data) {
if (pti->pt_flags & PF_UCNTL)
return (EINVAL);
pti->pt_flags |= PF_PKT;
} else
pti->pt_flags &= ~PF_PKT;
return (0);
case TIOCUCNTL:
if (*(int *)data) {
if (pti->pt_flags & PF_PKT)
return (EINVAL);
pti->pt_flags |= PF_UCNTL;
} else
pti->pt_flags &= ~PF_UCNTL;
return (0);
case TIOCREMOTE:
if (*(int *)data)
pti->pt_flags |= PF_REMOTE;
else
pti->pt_flags &= ~PF_REMOTE;
ttyflush(tp, FREAD|FWRITE);
return (0);
#ifdef COMPAT_OLDTTY
case TIOCSETP:
case TIOCSETN:
#endif
case TIOCSETD:
case TIOCSETA:
case TIOCSETAW:
case TIOCSETAF:
ndflush(&tp->t_outq, tp->t_outq.c_cc);
break;
case TIOCSIG:
if (*(unsigned int *)data >= NSIG ||
*(unsigned int *)data == 0)
return(EINVAL);
if ((tp->t_lflag&NOFLSH) == 0)
ttyflush(tp, FREAD|FWRITE);
pgsignal(tp->t_pgrp, *(unsigned int *)data, 1);
if ((*(unsigned int *)data == SIGINFO) &&
((tp->t_lflag&NOKERNINFO) == 0))
ttyinfo(tp);
return(0);
}
error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
if (error < 0)
error = ttioctl(tp, cmd, data, flag, p);
if (error < 0) {
if (pti->pt_flags & PF_UCNTL &&
(cmd & ~0xff) == UIOCCMD(0)) {
if (cmd & 0xff) {
pti->pt_ucntl = (u_char)cmd;
ptcwakeup(tp, FREAD);
}
return (0);
}
error = ENOTTY;
}
/*
* If external processing and packet mode send ioctl packet.
*/
if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) {
switch (cmd) {
case TIOCSETA:
case TIOCSETAW:
case TIOCSETAF:
#ifdef COMPAT_OLDTTY
case TIOCSETP:
case TIOCSETN:
case TIOCSETC:
case TIOCSLTC:
case TIOCLBIS:
case TIOCLBIC:
case TIOCLSET:
#endif
pti->pt_send |= TIOCPKT_IOCTL;
ptcwakeup(tp, FREAD);
default:
break;
}
}
stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) &&
CCEQ(cc[VSTART], CTRL('q'));
if (pti->pt_flags & PF_NOSTOP) {
if (stop) {
pti->pt_send &= ~TIOCPKT_NOSTOP;
pti->pt_send |= TIOCPKT_DOSTOP;
pti->pt_flags &= ~PF_NOSTOP;
ptcwakeup(tp, FREAD);
}
} else {
if (!stop) {
pti->pt_send &= ~TIOCPKT_DOSTOP;
pti->pt_send |= TIOCPKT_NOSTOP;
pti->pt_flags |= PF_NOSTOP;
ptcwakeup(tp, FREAD);
}
}
return (error);
}
static int
ptsread(struct dev_read_args *ap)
{
cdev_t dev = ap->a_head.a_dev;
struct proc *p = curproc;
struct tty *tp = dev->si_tty;
struct pt_ioctl *pti = dev->si_drv1;
struct lwp *lp;
int error = 0;
lp = curthread->td_lwp;
lwkt_gettoken(&tty_token);
again:
if (pti->pt_flags & PF_REMOTE) {
while (isbackground(p, tp)) {
if (SIGISMEMBER(p->p_sigignore, SIGTTIN) ||
SIGISMEMBER(lp->lwp_sigmask, SIGTTIN) ||
p->p_pgrp->pg_jobc == 0 ||
(p->p_flags & P_PPWAIT)) {
lwkt_reltoken(&tty_token);
return (EIO);
}
pgsignal(p->p_pgrp, SIGTTIN, 1);
error = ttysleep(tp, &lbolt, PCATCH, "ptsbg", 0);
if (error) {
lwkt_reltoken(&tty_token);
return (error);
}
}
if (tp->t_canq.c_cc == 0) {
if (ap->a_ioflag & IO_NDELAY) {
lwkt_reltoken(&tty_token);
return (EWOULDBLOCK);
}
error = ttysleep(tp, TSA_PTS_READ(tp), PCATCH,
"ptsin", 0);
if (error) {
lwkt_reltoken(&tty_token);
return (error);
}
goto again;
}
while (tp->t_canq.c_cc > 1 && ap->a_uio->uio_resid > 0)
if (ureadc(clist_getc(&tp->t_canq), ap->a_uio) < 0) {
error = EFAULT;
break;
}
if (tp->t_canq.c_cc == 1)
clist_getc(&tp->t_canq);
if (tp->t_canq.c_cc) {
lwkt_reltoken(&tty_token);
return (error);
}
} else
if (tp->t_oproc)
error = (*linesw[tp->t_line].l_read)(tp, ap->a_uio, ap->a_ioflag);
ptcwakeup(tp, FWRITE);
lwkt_reltoken(&tty_token);
return (error);
}
/*ARGSUSED*/
static int
ptsopen(struct dev_open_args *ap)
{
cdev_t dev = ap->a_head.a_dev;
struct tty *tp;
int error;
struct pt_ioctl *pti;
/*
* The pti will already be assigned by the clone code or
* pre-created if a non-unix 98 pty. If si_drv1 is NULL
* we are somehow racing a unix98 termination.
*/
if (dev->si_drv1 == NULL)
return(ENXIO);
pti = dev->si_drv1;
lwkt_gettoken(&tty_token);
if (pti_hold(pti)) {
lwkt_reltoken(&tty_token);
return(ENXIO);
}
tp = dev->si_tty;
/*
* Reinit most of the tty state if it isn't open. Handle
* exclusive access.
*/
if ((tp->t_state & TS_ISOPEN) == 0) {
ttychars(tp); /* Set up default chars */
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_lflag = TTYDEF_LFLAG;
tp->t_cflag = TTYDEF_CFLAG;
tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
} else if ((tp->t_state & TS_XCLUDE) &&
priv_check_cred(ap->a_cred, PRIV_ROOT, 0)) {
pti_done(pti);
lwkt_reltoken(&tty_token);
return (EBUSY);
} else if (pti->pt_prison != ap->a_cred->cr_prison) {
pti_done(pti);
lwkt_reltoken(&tty_token);
return (EBUSY);
}
/*
* If the ptc is already present this will connect us up. It
* is unclear if this is actually needed.
*
* If neither side is open be sure to clear any left over
* ZOMBIE state before continuing.
*/
if (tp->t_oproc)
(void)(*linesw[tp->t_line].l_modem)(tp, 1);
else if ((pti->pt_flags & PF_SOPEN) == 0)
tp->t_state &= ~TS_ZOMBIE;
/*
* Wait for the carrier (ptc side)
*/
while ((tp->t_state & TS_CARR_ON) == 0) {
if (ap->a_oflags & FNONBLOCK)
break;
error = ttysleep(tp, TSA_CARR_ON(tp), PCATCH, "ptsopn", 0);
if (error) {
pti_done(pti);
lwkt_reltoken(&tty_token);
return (error);
}
}
/*
* Mark the tty open and mark the slave side as being open.
*/
error = (*linesw[tp->t_line].l_open)(dev, tp);
if (error == 0) {
pti->pt_flags |= PF_SOPEN;
pti->pt_flags &= ~PF_SCLOSED;
ptcwakeup(tp, FREAD|FWRITE);
}
pti_done(pti);
lwkt_reltoken(&tty_token);
return (error);
}
/*ARGSUSED*/
static int
ptyioctl(struct dev_ioctl_args *ap)
{
cdev_t dev = ap->a_head.a_dev;
struct tty *tp = dev->si_tty;
struct pt_ioctl *pti = dev->si_drv1;
u_char *cc = tp->t_cc;
int stop, error;
lwkt_gettoken(&tty_token);
if (dev_dflags(dev) & D_MASTER) {
switch (ap->a_cmd) {
case TIOCGPGRP:
/*
* We avoid calling ttioctl on the controller since,
* in that case, tp must be the controlling terminal.
*/
*(int *)ap->a_data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0;
lwkt_reltoken(&tty_token);
return (0);
case TIOCPKT:
if (*(int *)ap->a_data) {
if (pti->pt_flags & PF_UCNTL) {
lwkt_reltoken(&tty_token);
return (EINVAL);
}
pti->pt_flags |= PF_PKT;
} else {
pti->pt_flags &= ~PF_PKT;
}
lwkt_reltoken(&tty_token);
return (0);
case TIOCUCNTL:
if (*(int *)ap->a_data) {
if (pti->pt_flags & PF_PKT) {
lwkt_reltoken(&tty_token);
return (EINVAL);
}
pti->pt_flags |= PF_UCNTL;
} else {
pti->pt_flags &= ~PF_UCNTL;
}
lwkt_reltoken(&tty_token);
return (0);
case TIOCREMOTE:
if (*(int *)ap->a_data)
pti->pt_flags |= PF_REMOTE;
else
pti->pt_flags &= ~PF_REMOTE;
ttyflush(tp, FREAD|FWRITE);
lwkt_reltoken(&tty_token);
return (0);
#ifdef UNIX98_PTYS
case TIOCISPTMASTER:
if ((pti->pt_flags & PF_UNIX98) &&
(pti->devc == dev)) {
lwkt_reltoken(&tty_token);
return (0);
} else {
lwkt_reltoken(&tty_token);
return (EINVAL);
}
}
#endif
/*
* The rest of the ioctls shouldn't be called until
* the slave is open.
*/
if ((tp->t_state & TS_ISOPEN) == 0) {
lwkt_reltoken(&tty_token);
return (EAGAIN);
}
switch (ap->a_cmd) {
#ifdef COMPAT_43
case TIOCSETP:
case TIOCSETN:
#endif
case TIOCSETD:
case TIOCSETA:
case TIOCSETAW:
case TIOCSETAF:
/*
* IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG.
* ttywflush(tp) will hang if there are characters in
* the outq.
*/
ndflush(&tp->t_outq, tp->t_outq.c_cc);
break;
case TIOCSIG:
if (*(unsigned int *)ap->a_data >= NSIG ||
*(unsigned int *)ap->a_data == 0) {
lwkt_reltoken(&tty_token);
return(EINVAL);
}
if ((tp->t_lflag&NOFLSH) == 0)
ttyflush(tp, FREAD|FWRITE);
pgsignal(tp->t_pgrp, *(unsigned int *)ap->a_data, 1);
if ((*(unsigned int *)ap->a_data == SIGINFO) &&
((tp->t_lflag&NOKERNINFO) == 0))
ttyinfo(tp);
lwkt_reltoken(&tty_token);
return(0);
}
}
if (ap->a_cmd == TIOCEXT) {
/*
* When the EXTPROC bit is being toggled, we need
* to send an TIOCPKT_IOCTL if the packet driver
* is turned on.
*/
if (*(int *)ap->a_data) {
if (pti->pt_flags & PF_PKT) {
pti->pt_send |= TIOCPKT_IOCTL;
ptcwakeup(tp, FREAD);
}
tp->t_lflag |= EXTPROC;
} else {
if ((tp->t_lflag & EXTPROC) &&
(pti->pt_flags & PF_PKT)) {
pti->pt_send |= TIOCPKT_IOCTL;
ptcwakeup(tp, FREAD);
}
tp->t_lflag &= ~EXTPROC;
}
lwkt_reltoken(&tty_token);
return(0);
}
error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data,
ap->a_fflag, ap->a_cred);
if (error == ENOIOCTL)
error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
if (error == ENOIOCTL) {
if (pti->pt_flags & PF_UCNTL &&
(ap->a_cmd & ~0xff) == UIOCCMD(0)) {
if (ap->a_cmd & 0xff) {
pti->pt_ucntl = (u_char)ap->a_cmd;
ptcwakeup(tp, FREAD);
}
lwkt_reltoken(&tty_token);
return (0);
}
error = ENOTTY;
}
/*
* If external processing and packet mode send ioctl packet.
*/
if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) {
switch(ap->a_cmd) {
case TIOCSETA:
case TIOCSETAW:
case TIOCSETAF:
#ifdef COMPAT_43
case TIOCSETP:
case TIOCSETN:
#endif
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
case TIOCSETC:
case TIOCSLTC:
case TIOCLBIS:
case TIOCLBIC:
case TIOCLSET:
#endif
pti->pt_send |= TIOCPKT_IOCTL;
ptcwakeup(tp, FREAD);
default:
break;
}
}
stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s'))
&& CCEQ(cc[VSTART], CTRL('q'));
if (pti->pt_flags & PF_NOSTOP) {
if (stop) {
pti->pt_send &= ~TIOCPKT_NOSTOP;
pti->pt_send |= TIOCPKT_DOSTOP;
pti->pt_flags &= ~PF_NOSTOP;
ptcwakeup(tp, FREAD);
}
} else {
if (!stop) {
pti->pt_send &= ~TIOCPKT_DOSTOP;
pti->pt_send |= TIOCPKT_NOSTOP;
pti->pt_flags |= PF_NOSTOP;
ptcwakeup(tp, FREAD);
}
}
lwkt_reltoken(&tty_token);
return (error);
}
