Register keyword removal
[dragonfly.git] / sys / kern / tty_pty.c
CommitLineData
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1/*
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)tty_pty.c 8.4 (Berkeley) 2/20/95
34 * $FreeBSD: src/sys/kern/tty_pty.c,v 1.74.2.4 2002/02/20 19:58:13 dillon Exp $
1fd87d54 35 * $DragonFly: src/sys/kern/tty_pty.c,v 1.8 2003/07/26 19:42:11 rob Exp $
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36 */
37
38/*
39 * Pseudo-teletype Driver
40 * (Actually two drivers, requiring two entries in 'cdevsw')
41 */
42#include "pty.h" /* XXX */
43#include "opt_compat.h"
44#include <sys/param.h>
45#include <sys/systm.h>
46#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
47#include <sys/ioctl_compat.h>
48#endif
49#include <sys/proc.h>
50#include <sys/tty.h>
51#include <sys/conf.h>
52#include <sys/fcntl.h>
53#include <sys/poll.h>
54#include <sys/kernel.h>
55#include <sys/vnode.h>
56#include <sys/signalvar.h>
57#include <sys/malloc.h>
335dda38 58#include <sys/device.h>
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59
60MALLOC_DEFINE(M_PTY, "ptys", "pty data structures");
61
62static void ptsstart __P((struct tty *tp));
63static void ptsstop __P((struct tty *tp, int rw));
64static void ptcwakeup __P((struct tty *tp, int flag));
65static void ptyinit __P((int n));
66
67static d_open_t ptsopen;
68static d_close_t ptsclose;
69static d_read_t ptsread;
70static d_write_t ptswrite;
71static d_ioctl_t ptyioctl;
72static d_open_t ptcopen;
73static d_close_t ptcclose;
74static d_read_t ptcread;
75static d_write_t ptcwrite;
76static d_poll_t ptcpoll;
77
78#define CDEV_MAJOR_S 5
79static struct cdevsw pts_cdevsw = {
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80 /* name */ "pts",
81 /* maj */ CDEV_MAJOR_S,
82 /* flags */ D_TTY | D_KQFILTER,
83 /* port */ NULL,
84 /* autoq */ 0,
85
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86 /* open */ ptsopen,
87 /* close */ ptsclose,
88 /* read */ ptsread,
89 /* write */ ptswrite,
90 /* ioctl */ ptyioctl,
91 /* poll */ ttypoll,
92 /* mmap */ nommap,
93 /* strategy */ nostrategy,
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94 /* dump */ nodump,
95 /* psize */ nopsize,
fabb8ceb 96 /* kqfilter */ ttykqfilter
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97};
98
99#define CDEV_MAJOR_C 6
100static struct cdevsw ptc_cdevsw = {
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101 /* name */ "ptc",
102 /* maj */ CDEV_MAJOR_C,
335dda38 103 /* flags */ D_TTY | D_KQFILTER | D_MASTER,
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104 /* port */ NULL,
105 /* autoq */ 0,
106
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107 /* open */ ptcopen,
108 /* close */ ptcclose,
109 /* read */ ptcread,
110 /* write */ ptcwrite,
111 /* ioctl */ ptyioctl,
112 /* poll */ ptcpoll,
113 /* mmap */ nommap,
114 /* strategy */ nostrategy,
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115 /* dump */ nodump,
116 /* psize */ nopsize,
fabb8ceb 117 /* kqfilter */ ttykqfilter
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118};
119
120#define BUFSIZ 100 /* Chunk size iomoved to/from user */
121
122struct pt_ioctl {
123 int pt_flags;
124 struct selinfo pt_selr, pt_selw;
125 u_char pt_send;
126 u_char pt_ucntl;
127 struct tty pt_tty;
128 dev_t devs, devc;
129 struct prison *pt_prison;
130};
131
132#define PF_PKT 0x08 /* packet mode */
133#define PF_STOPPED 0x10 /* user told stopped */
134#define PF_REMOTE 0x20 /* remote and flow controlled input */
135#define PF_NOSTOP 0x40
136#define PF_UCNTL 0x80 /* user control mode */
137
138/*
139 * This function creates and initializes a pts/ptc pair
140 *
141 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
142 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
143 *
144 * XXX: define and add mapping of upper minor bits to allow more
145 * than 256 ptys.
146 */
147static void
148ptyinit(n)
149 int n;
150{
151 dev_t devs, devc;
152 char *names = "pqrsPQRS";
153 struct pt_ioctl *pt;
154
155 /* For now we only map the lower 8 bits of the minor */
156 if (n & ~0xff)
157 return;
158
159 pt = malloc(sizeof(*pt), M_PTY, M_WAITOK);
160 bzero(pt, sizeof(*pt));
161 pt->devs = devs = make_dev(&pts_cdevsw, n,
162 0, 0, 0666, "tty%c%r", names[n / 32], n % 32);
163 pt->devc = devc = make_dev(&ptc_cdevsw, n,
164 0, 0, 0666, "pty%c%r", names[n / 32], n % 32);
165
166 devs->si_drv1 = devc->si_drv1 = pt;
167 devs->si_tty = devc->si_tty = &pt->pt_tty;
168 pt->pt_tty.t_dev = devs;
169 ttyregister(&pt->pt_tty);
170}
171
172/*ARGSUSED*/
173static int
41c20dac 174ptsopen(dev_t dev, int flag, int devtype, struct thread *td)
984263bc 175{
1fd87d54 176 struct tty *tp;
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177 int error;
178 int minr;
179 dev_t nextdev;
180 struct pt_ioctl *pti;
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181 struct proc *p;
182
183 p = td->td_proc;
184 KKASSERT(p != NULL);
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185
186 /*
187 * XXX: Gross hack for DEVFS:
188 * XXX: DEVFS is no more, should this be removed?
189 * If we openned this device, ensure we have the
190 * next one too, so people can open it.
191 */
192 minr = lminor(dev);
193 if (minr < 255) {
194 nextdev = makedev(major(dev), minr + 1);
195 if (!nextdev->si_drv1) {
196 ptyinit(minr + 1);
197 }
198 }
199 if (!dev->si_drv1)
200 ptyinit(minor(dev));
201 if (!dev->si_drv1)
202 return(ENXIO);
203 pti = dev->si_drv1;
204 tp = dev->si_tty;
205 if ((tp->t_state & TS_ISOPEN) == 0) {
206 ttychars(tp); /* Set up default chars */
207 tp->t_iflag = TTYDEF_IFLAG;
208 tp->t_oflag = TTYDEF_OFLAG;
209 tp->t_lflag = TTYDEF_LFLAG;
210 tp->t_cflag = TTYDEF_CFLAG;
211 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
dadab5e9 212 } else if (tp->t_state & TS_XCLUDE && suser(td)) {
984263bc 213 return (EBUSY);
41c20dac 214 } else if (pti->pt_prison != p->p_ucred->cr_prison) {
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215 return (EBUSY);
216 }
217 if (tp->t_oproc) /* Ctrlr still around. */
218 (void)(*linesw[tp->t_line].l_modem)(tp, 1);
219 while ((tp->t_state & TS_CARR_ON) == 0) {
220 if (flag&FNONBLOCK)
221 break;
377d4740 222 error = ttysleep(tp, TSA_CARR_ON(tp), PCATCH, "ptsopn", 0);
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223 if (error)
224 return (error);
225 }
226 error = (*linesw[tp->t_line].l_open)(dev, tp);
227 if (error == 0)
228 ptcwakeup(tp, FREAD|FWRITE);
229 return (error);
230}
231
232static int
41c20dac 233ptsclose(dev, flag, mode, td)
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234 dev_t dev;
235 int flag, mode;
41c20dac 236 struct thread *td;
984263bc 237{
1fd87d54 238 struct tty *tp;
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239 int err;
240
241 tp = dev->si_tty;
242 err = (*linesw[tp->t_line].l_close)(tp, flag);
243 ptsstop(tp, FREAD|FWRITE);
244 (void) ttyclose(tp);
245 return (err);
246}
247
248static int
249ptsread(dev, uio, flag)
250 dev_t dev;
251 struct uio *uio;
252 int flag;
253{
254 struct proc *p = curproc;
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255 struct tty *tp = dev->si_tty;
256 struct pt_ioctl *pti = dev->si_drv1;
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257 int error = 0;
258
259again:
260 if (pti->pt_flags & PF_REMOTE) {
261 while (isbackground(p, tp)) {
262 if (SIGISMEMBER(p->p_sigignore, SIGTTIN) ||
263 SIGISMEMBER(p->p_sigmask, SIGTTIN) ||
264 p->p_pgrp->pg_jobc == 0 || p->p_flag & P_PPWAIT)
265 return (EIO);
266 pgsignal(p->p_pgrp, SIGTTIN, 1);
377d4740 267 error = ttysleep(tp, &lbolt, PCATCH, "ptsbg", 0);
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268 if (error)
269 return (error);
270 }
271 if (tp->t_canq.c_cc == 0) {
272 if (flag & IO_NDELAY)
273 return (EWOULDBLOCK);
377d4740 274 error = ttysleep(tp, TSA_PTS_READ(tp), PCATCH,
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275 "ptsin", 0);
276 if (error)
277 return (error);
278 goto again;
279 }
280 while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0)
281 if (ureadc(getc(&tp->t_canq), uio) < 0) {
282 error = EFAULT;
283 break;
284 }
285 if (tp->t_canq.c_cc == 1)
286 (void) getc(&tp->t_canq);
287 if (tp->t_canq.c_cc)
288 return (error);
289 } else
290 if (tp->t_oproc)
291 error = (*linesw[tp->t_line].l_read)(tp, uio, flag);
292 ptcwakeup(tp, FWRITE);
293 return (error);
294}
295
296/*
297 * Write to pseudo-tty.
298 * Wakeups of controlling tty will happen
299 * indirectly, when tty driver calls ptsstart.
300 */
301static int
302ptswrite(dev, uio, flag)
303 dev_t dev;
304 struct uio *uio;
305 int flag;
306{
1fd87d54 307 struct tty *tp;
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308
309 tp = dev->si_tty;
310 if (tp->t_oproc == 0)
311 return (EIO);
312 return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
313}
314
315/*
316 * Start output on pseudo-tty.
317 * Wake up process selecting or sleeping for input from controlling tty.
318 */
319static void
320ptsstart(tp)
321 struct tty *tp;
322{
1fd87d54 323 struct pt_ioctl *pti = tp->t_dev->si_drv1;
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324
325 if (tp->t_state & TS_TTSTOP)
326 return;
327 if (pti->pt_flags & PF_STOPPED) {
328 pti->pt_flags &= ~PF_STOPPED;
329 pti->pt_send = TIOCPKT_START;
330 }
331 ptcwakeup(tp, FREAD);
332}
333
334static void
335ptcwakeup(tp, flag)
336 struct tty *tp;
337 int flag;
338{
339 struct pt_ioctl *pti = tp->t_dev->si_drv1;
340
341 if (flag & FREAD) {
342 selwakeup(&pti->pt_selr);
343 wakeup(TSA_PTC_READ(tp));
344 }
345 if (flag & FWRITE) {
346 selwakeup(&pti->pt_selw);
347 wakeup(TSA_PTC_WRITE(tp));
348 }
349}
350
351static int
41c20dac 352ptcopen(dev, flag, devtype, td)
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353 dev_t dev;
354 int flag, devtype;
41c20dac 355 struct thread *td;
984263bc 356{
1fd87d54 357 struct tty *tp;
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358 struct pt_ioctl *pti;
359
360 if (!dev->si_drv1)
361 ptyinit(minor(dev));
362 if (!dev->si_drv1)
363 return(ENXIO);
364 tp = dev->si_tty;
365 if (tp->t_oproc)
366 return (EIO);
41c20dac 367 KKASSERT(td->td_proc != NULL);
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368 tp->t_oproc = ptsstart;
369 tp->t_stop = ptsstop;
370 (void)(*linesw[tp->t_line].l_modem)(tp, 1);
371 tp->t_lflag &= ~EXTPROC;
372 pti = dev->si_drv1;
41c20dac 373 pti->pt_prison = td->td_proc->p_ucred->cr_prison;
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374 pti->pt_flags = 0;
375 pti->pt_send = 0;
376 pti->pt_ucntl = 0;
377 return (0);
378}
379
380static int
41c20dac 381ptcclose(dev, flags, fmt, td)
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382 dev_t dev;
383 int flags;
384 int fmt;
41c20dac 385 struct thread *td;
984263bc 386{
1fd87d54 387 struct tty *tp;
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388
389 tp = dev->si_tty;
390 (void)(*linesw[tp->t_line].l_modem)(tp, 0);
391
392 /*
393 * XXX MDMBUF makes no sense for ptys but would inhibit the above
394 * l_modem(). CLOCAL makes sense but isn't supported. Special
395 * l_modem()s that ignore carrier drop make no sense for ptys but
396 * may be in use because other parts of the line discipline make
397 * sense for ptys. Recover by doing everything that a normal
398 * ttymodem() would have done except for sending a SIGHUP.
399 */
400 if (tp->t_state & TS_ISOPEN) {
401 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED);
402 tp->t_state |= TS_ZOMBIE;
403 ttyflush(tp, FREAD | FWRITE);
404 }
405
406 tp->t_oproc = 0; /* mark closed */
407 return (0);
408}
409
410static int
411ptcread(dev, uio, flag)
412 dev_t dev;
413 struct uio *uio;
414 int flag;
415{
1fd87d54 416 struct tty *tp = dev->si_tty;
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417 struct pt_ioctl *pti = dev->si_drv1;
418 char buf[BUFSIZ];
419 int error = 0, cc;
420
421 /*
422 * We want to block until the slave
423 * is open, and there's something to read;
424 * but if we lost the slave or we're NBIO,
425 * then return the appropriate error instead.
426 */
427 for (;;) {
428 if (tp->t_state&TS_ISOPEN) {
429 if (pti->pt_flags&PF_PKT && pti->pt_send) {
430 error = ureadc((int)pti->pt_send, uio);
431 if (error)
432 return (error);
433 if (pti->pt_send & TIOCPKT_IOCTL) {
434 cc = min(uio->uio_resid,
435 sizeof(tp->t_termios));
436 uiomove((caddr_t)&tp->t_termios, cc,
437 uio);
438 }
439 pti->pt_send = 0;
440 return (0);
441 }
442 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) {
443 error = ureadc((int)pti->pt_ucntl, uio);
444 if (error)
445 return (error);
446 pti->pt_ucntl = 0;
447 return (0);
448 }
449 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0)
450 break;
451 }
452 if ((tp->t_state & TS_CONNECTED) == 0)
453 return (0); /* EOF */
454 if (flag & IO_NDELAY)
455 return (EWOULDBLOCK);
377d4740 456 error = tsleep(TSA_PTC_READ(tp), PCATCH, "ptcin", 0);
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457 if (error)
458 return (error);
459 }
460 if (pti->pt_flags & (PF_PKT|PF_UCNTL))
461 error = ureadc(0, uio);
462 while (uio->uio_resid > 0 && error == 0) {
463 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ));
464 if (cc <= 0)
465 break;
466 error = uiomove(buf, cc, uio);
467 }
468 ttwwakeup(tp);
469 return (error);
470}
471
472static void
473ptsstop(tp, flush)
1fd87d54 474 struct tty *tp;
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475 int flush;
476{
477 struct pt_ioctl *pti = tp->t_dev->si_drv1;
478 int flag;
479
480 /* note: FLUSHREAD and FLUSHWRITE already ok */
481 if (flush == 0) {
482 flush = TIOCPKT_STOP;
483 pti->pt_flags |= PF_STOPPED;
484 } else
485 pti->pt_flags &= ~PF_STOPPED;
486 pti->pt_send |= flush;
487 /* change of perspective */
488 flag = 0;
489 if (flush & FREAD)
490 flag |= FWRITE;
491 if (flush & FWRITE)
492 flag |= FREAD;
493 ptcwakeup(tp, flag);
494}
495
496static int
41c20dac 497ptcpoll(dev, events, td)
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498 dev_t dev;
499 int events;
41c20dac 500 struct thread *td;
984263bc 501{
1fd87d54 502 struct tty *tp = dev->si_tty;
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503 struct pt_ioctl *pti = dev->si_drv1;
504 int revents = 0;
505 int s;
506
507 if ((tp->t_state & TS_CONNECTED) == 0)
41c20dac 508 return (seltrue(dev, events, td) | POLLHUP);
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509
510 /*
511 * Need to block timeouts (ttrstart).
512 */
513 s = spltty();
514
515 if (events & (POLLIN | POLLRDNORM))
516 if ((tp->t_state & TS_ISOPEN) &&
517 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) ||
518 ((pti->pt_flags & PF_PKT) && pti->pt_send) ||
519 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl)))
520 revents |= events & (POLLIN | POLLRDNORM);
521
522 if (events & (POLLOUT | POLLWRNORM))
523 if (tp->t_state & TS_ISOPEN &&
524 ((pti->pt_flags & PF_REMOTE) ?
525 (tp->t_canq.c_cc == 0) :
526 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) ||
527 (tp->t_canq.c_cc == 0 && (tp->t_lflag & ICANON)))))
528 revents |= events & (POLLOUT | POLLWRNORM);
529
530 if (events & POLLHUP)
531 if ((tp->t_state & TS_CARR_ON) == 0)
532 revents |= POLLHUP;
533
534 if (revents == 0) {
535 if (events & (POLLIN | POLLRDNORM))
41c20dac 536 selrecord(td, &pti->pt_selr);
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537
538 if (events & (POLLOUT | POLLWRNORM))
41c20dac 539 selrecord(td, &pti->pt_selw);
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540 }
541 splx(s);
542
543 return (revents);
544}
545
546static int
547ptcwrite(dev, uio, flag)
548 dev_t dev;
1fd87d54 549 struct uio *uio;
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550 int flag;
551{
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552 struct tty *tp = dev->si_tty;
553 u_char *cp = 0;
554 int cc = 0;
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555 u_char locbuf[BUFSIZ];
556 int cnt = 0;
557 struct pt_ioctl *pti = dev->si_drv1;
558 int error = 0;
559
560again:
561 if ((tp->t_state&TS_ISOPEN) == 0)
562 goto block;
563 if (pti->pt_flags & PF_REMOTE) {
564 if (tp->t_canq.c_cc)
565 goto block;
566 while ((uio->uio_resid > 0 || cc > 0) &&
567 tp->t_canq.c_cc < TTYHOG - 1) {
568 if (cc == 0) {
569 cc = min(uio->uio_resid, BUFSIZ);
570 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc);
571 cp = locbuf;
572 error = uiomove((caddr_t)cp, cc, uio);
573 if (error)
574 return (error);
575 /* check again for safety */
576 if ((tp->t_state & TS_ISOPEN) == 0) {
577 /* adjust as usual */
578 uio->uio_resid += cc;
579 return (EIO);
580 }
581 }
582 if (cc > 0) {
583 cc = b_to_q((char *)cp, cc, &tp->t_canq);
584 /*
585 * XXX we don't guarantee that the canq size
586 * is >= TTYHOG, so the above b_to_q() may
587 * leave some bytes uncopied. However, space
588 * is guaranteed for the null terminator if
589 * we don't fail here since (TTYHOG - 1) is
590 * not a multiple of CBSIZE.
591 */
592 if (cc > 0)
593 break;
594 }
595 }
596 /* adjust for data copied in but not written */
597 uio->uio_resid += cc;
598 (void) putc(0, &tp->t_canq);
599 ttwakeup(tp);
600 wakeup(TSA_PTS_READ(tp));
601 return (0);
602 }
603 while (uio->uio_resid > 0 || cc > 0) {
604 if (cc == 0) {
605 cc = min(uio->uio_resid, BUFSIZ);
606 cp = locbuf;
607 error = uiomove((caddr_t)cp, cc, uio);
608 if (error)
609 return (error);
610 /* check again for safety */
611 if ((tp->t_state & TS_ISOPEN) == 0) {
612 /* adjust for data copied in but not written */
613 uio->uio_resid += cc;
614 return (EIO);
615 }
616 }
617 while (cc > 0) {
618 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 &&
619 (tp->t_canq.c_cc > 0 || !(tp->t_lflag&ICANON))) {
620 wakeup(TSA_HUP_OR_INPUT(tp));
621 goto block;
622 }
623 (*linesw[tp->t_line].l_rint)(*cp++, tp);
624 cnt++;
625 cc--;
626 }
627 cc = 0;
628 }
629 return (0);
630block:
631 /*
632 * Come here to wait for slave to open, for space
633 * in outq, or space in rawq, or an empty canq.
634 */
635 if ((tp->t_state & TS_CONNECTED) == 0) {
636 /* adjust for data copied in but not written */
637 uio->uio_resid += cc;
638 return (EIO);
639 }
640 if (flag & IO_NDELAY) {
641 /* adjust for data copied in but not written */
642 uio->uio_resid += cc;
643 if (cnt == 0)
644 return (EWOULDBLOCK);
645 return (0);
646 }
377d4740 647 error = tsleep(TSA_PTC_WRITE(tp), PCATCH, "ptcout", 0);
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648 if (error) {
649 /* adjust for data copied in but not written */
650 uio->uio_resid += cc;
651 return (error);
652 }
653 goto again;
654}
655
656/*ARGSUSED*/
657static int
41c20dac 658ptyioctl(dev, cmd, data, flag, td)
984263bc
MD
659 dev_t dev;
660 u_long cmd;
661 caddr_t data;
662 int flag;
41c20dac 663 struct thread *td;
984263bc 664{
1fd87d54
RG
665 struct tty *tp = dev->si_tty;
666 struct pt_ioctl *pti = dev->si_drv1;
667 u_char *cc = tp->t_cc;
984263bc
MD
668 int stop, error;
669
335dda38 670 if (dev_dflags(dev) & D_MASTER) {
984263bc
MD
671 switch (cmd) {
672
673 case TIOCGPGRP:
674 /*
675 * We avoid calling ttioctl on the controller since,
676 * in that case, tp must be the controlling terminal.
677 */
678 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0;
679 return (0);
680
681 case TIOCPKT:
682 if (*(int *)data) {
683 if (pti->pt_flags & PF_UCNTL)
684 return (EINVAL);
685 pti->pt_flags |= PF_PKT;
686 } else
687 pti->pt_flags &= ~PF_PKT;
688 return (0);
689
690 case TIOCUCNTL:
691 if (*(int *)data) {
692 if (pti->pt_flags & PF_PKT)
693 return (EINVAL);
694 pti->pt_flags |= PF_UCNTL;
695 } else
696 pti->pt_flags &= ~PF_UCNTL;
697 return (0);
698
699 case TIOCREMOTE:
700 if (*(int *)data)
701 pti->pt_flags |= PF_REMOTE;
702 else
703 pti->pt_flags &= ~PF_REMOTE;
704 ttyflush(tp, FREAD|FWRITE);
705 return (0);
706 }
707
708 /*
709 * The rest of the ioctls shouldn't be called until
710 * the slave is open.
711 */
712 if ((tp->t_state & TS_ISOPEN) == 0)
713 return (EAGAIN);
714
715 switch (cmd) {
716#ifdef COMPAT_43
717 case TIOCSETP:
718 case TIOCSETN:
719#endif
720 case TIOCSETD:
721 case TIOCSETA:
722 case TIOCSETAW:
723 case TIOCSETAF:
724 /*
725 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG.
726 * ttywflush(tp) will hang if there are characters in
727 * the outq.
728 */
729 ndflush(&tp->t_outq, tp->t_outq.c_cc);
730 break;
731
732 case TIOCSIG:
733 if (*(unsigned int *)data >= NSIG ||
734 *(unsigned int *)data == 0)
735 return(EINVAL);
736 if ((tp->t_lflag&NOFLSH) == 0)
737 ttyflush(tp, FREAD|FWRITE);
738 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1);
739 if ((*(unsigned int *)data == SIGINFO) &&
740 ((tp->t_lflag&NOKERNINFO) == 0))
741 ttyinfo(tp);
742 return(0);
743 }
744 }
745 if (cmd == TIOCEXT) {
746 /*
747 * When the EXTPROC bit is being toggled, we need
748 * to send an TIOCPKT_IOCTL if the packet driver
749 * is turned on.
750 */
751 if (*(int *)data) {
752 if (pti->pt_flags & PF_PKT) {
753 pti->pt_send |= TIOCPKT_IOCTL;
754 ptcwakeup(tp, FREAD);
755 }
756 tp->t_lflag |= EXTPROC;
757 } else {
758 if ((tp->t_lflag & EXTPROC) &&
759 (pti->pt_flags & PF_PKT)) {
760 pti->pt_send |= TIOCPKT_IOCTL;
761 ptcwakeup(tp, FREAD);
762 }
763 tp->t_lflag &= ~EXTPROC;
764 }
765 return(0);
766 }
41c20dac 767 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td);
984263bc
MD
768 if (error == ENOIOCTL)
769 error = ttioctl(tp, cmd, data, flag);
770 if (error == ENOIOCTL) {
771 if (pti->pt_flags & PF_UCNTL &&
772 (cmd & ~0xff) == UIOCCMD(0)) {
773 if (cmd & 0xff) {
774 pti->pt_ucntl = (u_char)cmd;
775 ptcwakeup(tp, FREAD);
776 }
777 return (0);
778 }
779 error = ENOTTY;
780 }
781 /*
782 * If external processing and packet mode send ioctl packet.
783 */
784 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) {
785 switch(cmd) {
786 case TIOCSETA:
787 case TIOCSETAW:
788 case TIOCSETAF:
789#ifdef COMPAT_43
790 case TIOCSETP:
791 case TIOCSETN:
792#endif
793#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
794 case TIOCSETC:
795 case TIOCSLTC:
796 case TIOCLBIS:
797 case TIOCLBIC:
798 case TIOCLSET:
799#endif
800 pti->pt_send |= TIOCPKT_IOCTL;
801 ptcwakeup(tp, FREAD);
802 default:
803 break;
804 }
805 }
806 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s'))
807 && CCEQ(cc[VSTART], CTRL('q'));
808 if (pti->pt_flags & PF_NOSTOP) {
809 if (stop) {
810 pti->pt_send &= ~TIOCPKT_NOSTOP;
811 pti->pt_send |= TIOCPKT_DOSTOP;
812 pti->pt_flags &= ~PF_NOSTOP;
813 ptcwakeup(tp, FREAD);
814 }
815 } else {
816 if (!stop) {
817 pti->pt_send &= ~TIOCPKT_DOSTOP;
818 pti->pt_send |= TIOCPKT_NOSTOP;
819 pti->pt_flags |= PF_NOSTOP;
820 ptcwakeup(tp, FREAD);
821 }
822 }
823 return (error);
824}
825
826
827static void ptc_drvinit __P((void *unused));
828
829static void
830ptc_drvinit(unused)
831 void *unused;
832{
833 cdevsw_add(&pts_cdevsw);
834 cdevsw_add(&ptc_cdevsw);
835 /* XXX: Gross hack for DEVFS */
836 /* XXX: DEVFS is no more, should this be removed? */
837 ptyinit(0);
838}
839
840SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL)