-
-FREE_BSDSTATIC int
-ptcwrite(dev, uio, flag)
- dev_t dev;
- register struct uio *uio;
- int flag;
-{
- register struct tty *tp = pt_tty[minor(dev)];
- register u_char *cp = NULL;
- register int cc = 0;
- u_char locbuf[BUFSIZ];
- int cnt = 0;
- struct pt_ioctl *pti = &pt_ioctl[minor(dev)];
- int error = 0;
-
-again:
- if ((tp->t_state&TS_ISOPEN) == 0)
- goto block;
- if (pti->pt_flags & PF_REMOTE) {
- if (tp->t_canq.c_cc)
- goto block;
- while ((uio->uio_resid > 0 || cc > 0) &&
- tp->t_canq.c_cc < TTYHOG - 1) {
- if (cc == 0) {
- cc = min(uio->uio_resid, BUFSIZ);
- cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc);
- cp = locbuf;
- error = uiomove((caddr_t)cp, cc, uio);
- if (error)
- return (error);
- /* check again for safety */
- if ((tp->t_state & TS_ISOPEN) == 0) {
- /* adjust as usual */
- uio->uio_resid += cc;
- return (EIO);
- }
- }
- if (cc > 0) {
- cc = b_to_q((char *)cp, cc, &tp->t_canq);
- /*
- * XXX we don't guarantee that the canq size
- * is >= TTYHOG, so the above b_to_q() may
- * leave some bytes uncopied. However, space
- * is guaranteed for the null terminator if
- * we don't fail here since (TTYHOG - 1) is
- * not a multiple of CBSIZE.
- */
- if (cc > 0)
- break;
- }
- }
- /* adjust for data copied in but not written */
- uio->uio_resid += cc;
- (void) putc(0, &tp->t_canq);
- ttwakeup(tp);
- wakeup(TSA_PTS_READ(tp));
- return (0);
- }
- while (uio->uio_resid > 0 || cc > 0) {
- if (cc == 0) {
- cc = min(uio->uio_resid, BUFSIZ);
- cp = locbuf;
- error = uiomove((caddr_t)cp, cc, uio);
- if (error)
- return (error);
- /* check again for safety */
- if ((tp->t_state & TS_ISOPEN) == 0) {
- /* adjust for data copied in but not written */
- uio->uio_resid += cc;
- return (EIO);
- }
- }
- while (cc > 0) {
- if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 &&
- (tp->t_canq.c_cc > 0 || !(tp->t_iflag&ICANON))) {
- wakeup(TSA_HUP_OR_INPUT(tp));
- goto block;
- }
- (*linesw[tp->t_line].l_rint)(*cp++, tp);
- cnt++;
- cc--;
- }
- cc = 0;
- }
- return (0);
-block:
- /*
- * Come here to wait for slave to open, for space
- * in outq, or space in rawq, or an empty canq.
- */
- if ((tp->t_state & TS_CONNECTED) == 0) {
- /* adjust for data copied in but not written */
- uio->uio_resid += cc;
- return (EIO);
- }
- if (flag & IO_NDELAY) {
- /* adjust for data copied in but not written */
- uio->uio_resid += cc;
- if (cnt == 0)
- return (EWOULDBLOCK);
- return (0);
- }
- error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0);
- if (error) {
- /* adjust for data copied in but not written */
- uio->uio_resid += cc;
- return (error);
- }
- goto again;
-}
-
-#ifndef NeXT
-/* XXX we eventually want to go to this model,
- * but premier can't change the cdevsw */
-static struct tty *
-ptydevtotty(dev)
- dev_t dev;
-{
- if (minor(dev) >= npty)
- return (NULL);
-
- return &pt_tty[minor(dev)];
-}
-#endif /* !NeXT */
-
-/*ARGSUSED*/
-FREE_BSDSTATIC int
-#ifndef NeXT
-ptyioctl(dev, cmd, data, flag)
- dev_t dev;
- int cmd;
- caddr_t data;
- int flag;
-#else
-ptyioctl(dev, cmd, data, flag, p)
- dev_t dev;
- u_long cmd;
- caddr_t data;
- int flag;
- struct proc *p;
-#endif
-{
- register struct tty *tp = pt_tty[minor(dev)];
- register struct pt_ioctl *pti = &pt_ioctl[minor(dev)];
- register 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
-#ifndef NeXT
- if (cdevsw[major(dev)]->d_open == ptcopen)
-#else
- if (cdevsw[major(dev)].d_open == ptcopen)
-#endif
- switch (cmd) {
-
- case TIOCGPGRP:
- /*
- * We aviod 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_43
- 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_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);
- }
- }
- return (error);
-}
-
-#ifndef NeXT
-static ptc_devsw_installed = 0;
-
-static void
-ptc_drvinit(void *unused)
-{
-#ifdef DEVFS
- int i,j,k;
-#endif
- dev_t dev;
-
- if( ! ptc_devsw_installed ) {
- dev = makedev(CDEV_MAJOR_S, 0);
- cdevsw_add(&dev, &pts_cdevsw, NULL);
- dev = makedev(CDEV_MAJOR_C, 0);
- cdevsw_add(&dev, &ptc_cdevsw, NULL);
- ptc_devsw_installed = 1;
-#ifdef DEVFS
- for ( i = 0 ; i<NPTY ; i++ ) {
- j = i / 32;
- k = i % 32;
- devfs_token_pts[i] =
- devfs_add_devswf(&pts_cdevsw,i,
- DV_CHR,0,0,0666,
- "tty%c%n",jnames[j],k);
- devfs_token_ptc[i] =
- devfs_add_devswf(&ptc_cdevsw,i,
- DV_CHR,0,0,0666,
- "pty%c%n",jnames[j],k);
- }
-#endif
- }
-}
-
-SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL)
-#endif /* !NeXT */
projects / apple / xnu.git / blobdiff