1/*-
2 * Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Portions of this software were developed under sponsorship from Snow
6 * B.V., the Netherlands.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Portions of this software were developed under sponsorship from Snow
6 * B.V., the Netherlands.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
|
31__FBSDID("$FreeBSD: head/sys/kern/tty.c 216952 2011-01-04 10:59:38Z kib $");
| 31__FBSDID("$FreeBSD: head/sys/kern/tty.c 223575 2011-06-26 18:26:20Z ed $");
|
32
33#include "opt_compat.h"
34
35#include <sys/param.h>
36#include <sys/conf.h>
37#include <sys/cons.h>
38#include <sys/fcntl.h>
39#include <sys/file.h>
40#include <sys/filedesc.h>
41#include <sys/filio.h>
42#ifdef COMPAT_43TTY
43#include <sys/ioctl_compat.h>
44#endif /* COMPAT_43TTY */
45#include <sys/kernel.h>
46#include <sys/limits.h>
47#include <sys/malloc.h>
48#include <sys/mount.h>
49#include <sys/poll.h>
50#include <sys/priv.h>
51#include <sys/proc.h>
52#include <sys/serial.h>
53#include <sys/signal.h>
54#include <sys/stat.h>
55#include <sys/sx.h>
56#include <sys/sysctl.h>
57#include <sys/systm.h>
58#include <sys/tty.h>
59#include <sys/ttycom.h>
60#define TTYDEFCHARS
61#include <sys/ttydefaults.h>
62#undef TTYDEFCHARS
63#include <sys/ucred.h>
64#include <sys/vnode.h>
65
66#include <machine/stdarg.h>
67
68static MALLOC_DEFINE(M_TTY, "tty", "tty device");
69
70static void tty_rel_free(struct tty *tp);
71
72static TAILQ_HEAD(, tty) tty_list = TAILQ_HEAD_INITIALIZER(tty_list);
73static struct sx tty_list_sx;
74SX_SYSINIT(tty_list, &tty_list_sx, "tty list");
75static unsigned int tty_list_count = 0;
76
77/* Character device of /dev/console. */
78static struct cdev *dev_console;
79static const char *dev_console_filename;
80
81/*
82 * Flags that are supported and stored by this implementation.
83 */
84#define TTYSUP_IFLAG (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|ISTRIP|\
85 INLCR|IGNCR|ICRNL|IXON|IXOFF|IXANY|IMAXBEL)
86#define TTYSUP_OFLAG (OPOST|ONLCR|TAB3|ONOEOT|OCRNL|ONOCR|ONLRET)
87#define TTYSUP_LFLAG (ECHOKE|ECHOE|ECHOK|ECHO|ECHONL|ECHOPRT|\
88 ECHOCTL|ISIG|ICANON|ALTWERASE|IEXTEN|TOSTOP|\
89 FLUSHO|NOKERNINFO|NOFLSH)
90#define TTYSUP_CFLAG (CIGNORE|CSIZE|CSTOPB|CREAD|PARENB|PARODD|\
91 HUPCL|CLOCAL|CCTS_OFLOW|CRTS_IFLOW|CDTR_IFLOW|\
92 CDSR_OFLOW|CCAR_OFLOW)
93
94#define TTY_CALLOUT(tp,d) ((d) != (tp)->t_dev && (d) != dev_console)
95
96/*
97 * Set TTY buffer sizes.
98 */
99
100#define TTYBUF_MAX 65536
101
102static void
103tty_watermarks(struct tty *tp)
104{
105 size_t bs = 0;
106
107 /* Provide an input buffer for 0.2 seconds of data. */
108 if (tp->t_termios.c_cflag & CREAD)
109 bs = MIN(tp->t_termios.c_ispeed / 5, TTYBUF_MAX);
110 ttyinq_setsize(&tp->t_inq, tp, bs);
111
112 /* Set low watermark at 10% (when 90% is available). */
113 tp->t_inlow = (ttyinq_getallocatedsize(&tp->t_inq) * 9) / 10;
114
115 /* Provide an ouput buffer for 0.2 seconds of data. */
116 bs = MIN(tp->t_termios.c_ospeed / 5, TTYBUF_MAX);
117 ttyoutq_setsize(&tp->t_outq, tp, bs);
118
119 /* Set low watermark at 10% (when 90% is available). */
120 tp->t_outlow = (ttyoutq_getallocatedsize(&tp->t_outq) * 9) / 10;
121}
122
123static int
124tty_drain(struct tty *tp)
125{
126 int error;
127
128 if (ttyhook_hashook(tp, getc_inject))
129 /* buffer is inaccessible */
130 return (0);
131
132 while (ttyoutq_bytesused(&tp->t_outq) > 0) {
133 ttydevsw_outwakeup(tp);
134 /* Could be handled synchronously. */
135 if (ttyoutq_bytesused(&tp->t_outq) == 0)
136 return (0);
137
138 /* Wait for data to be drained. */
139 error = tty_wait(tp, &tp->t_outwait);
140 if (error)
141 return (error);
142 }
143
144 return (0);
145}
146
147/*
148 * Though ttydev_enter() and ttydev_leave() seem to be related, they
149 * don't have to be used together. ttydev_enter() is used by the cdev
150 * operations to prevent an actual operation from being processed when
151 * the TTY has been abandoned. ttydev_leave() is used by ttydev_open()
152 * and ttydev_close() to determine whether per-TTY data should be
153 * deallocated.
154 */
155
156static __inline int
157ttydev_enter(struct tty *tp)
158{
159 tty_lock(tp);
160
161 if (tty_gone(tp) || !tty_opened(tp)) {
162 /* Device is already gone. */
163 tty_unlock(tp);
164 return (ENXIO);
165 }
166
167 return (0);
168}
169
170static void
171ttydev_leave(struct tty *tp)
172{
173 tty_lock_assert(tp, MA_OWNED);
174
175 if (tty_opened(tp) || tp->t_flags & TF_OPENCLOSE) {
176 /* Device is still opened somewhere. */
177 tty_unlock(tp);
178 return;
179 }
180
181 tp->t_flags |= TF_OPENCLOSE;
182
183 /* Stop asynchronous I/O. */
184 funsetown(&tp->t_sigio);
185
186 /* Remove console TTY. */
187 if (constty == tp)
188 constty_clear();
189
190 /* Drain any output. */
191 MPASS((tp->t_flags & TF_STOPPED) == 0);
192 if (!tty_gone(tp))
193 tty_drain(tp);
194
195 ttydisc_close(tp);
196
197 /* Destroy associated buffers already. */
198 ttyinq_free(&tp->t_inq);
199 tp->t_inlow = 0;
200 ttyoutq_free(&tp->t_outq);
201 tp->t_outlow = 0;
202
203 knlist_clear(&tp->t_inpoll.si_note, 1);
204 knlist_clear(&tp->t_outpoll.si_note, 1);
205
206 if (!tty_gone(tp))
207 ttydevsw_close(tp);
208
209 tp->t_flags &= ~TF_OPENCLOSE;
210 cv_broadcast(&tp->t_dcdwait);
211 tty_rel_free(tp);
212}
213
214/*
215 * Operations that are exposed through the character device in /dev.
216 */
217static int
218ttydev_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
219{
220 struct tty *tp = dev->si_drv1;
221 int error = 0;
222
223 tty_lock(tp);
224 if (tty_gone(tp)) {
225 /* Device is already gone. */
226 tty_unlock(tp);
227 return (ENXIO);
228 }
229
230 /*
231 * Block when other processes are currently opening or closing
232 * the TTY.
233 */
234 while (tp->t_flags & TF_OPENCLOSE) {
235 error = tty_wait(tp, &tp->t_dcdwait);
236 if (error != 0) {
237 tty_unlock(tp);
238 return (error);
239 }
240 }
241 tp->t_flags |= TF_OPENCLOSE;
242
243 /*
244 * Make sure the "tty" and "cua" device cannot be opened at the
245 * same time.
246 */
247 if (TTY_CALLOUT(tp, dev)) {
248 if (tp->t_flags & TF_OPENED_IN) {
249 error = EBUSY;
250 goto done;
251 }
252 } else {
253 if (tp->t_flags & TF_OPENED_OUT) {
254 error = EBUSY;
255 goto done;
256 }
257 }
258
259 if (tp->t_flags & TF_EXCLUDE && priv_check(td, PRIV_TTY_EXCLUSIVE)) {
260 error = EBUSY;
261 goto done;
262 }
263
264 if (!tty_opened(tp)) {
265 /* Set proper termios flags. */
266 if (TTY_CALLOUT(tp, dev))
267 tp->t_termios = tp->t_termios_init_out;
268 else
269 tp->t_termios = tp->t_termios_init_in;
270 ttydevsw_param(tp, &tp->t_termios);
271 /* Prevent modem control on callout devices and /dev/console. */
272 if (TTY_CALLOUT(tp, dev) || dev == dev_console)
273 tp->t_termios.c_cflag |= CLOCAL;
274
275 ttydevsw_modem(tp, SER_DTR|SER_RTS, 0);
276
277 error = ttydevsw_open(tp);
278 if (error != 0)
279 goto done;
280
281 ttydisc_open(tp);
282 tty_watermarks(tp);
283 }
284
285 /* Wait for Carrier Detect. */
286 if ((oflags & O_NONBLOCK) == 0 &&
287 (tp->t_termios.c_cflag & CLOCAL) == 0) {
288 while ((ttydevsw_modem(tp, 0, 0) & SER_DCD) == 0) {
289 error = tty_wait(tp, &tp->t_dcdwait);
290 if (error != 0)
291 goto done;
292 }
293 }
294
295 if (dev == dev_console)
296 tp->t_flags |= TF_OPENED_CONS;
297 else if (TTY_CALLOUT(tp, dev))
298 tp->t_flags |= TF_OPENED_OUT;
299 else
300 tp->t_flags |= TF_OPENED_IN;
301
302done: tp->t_flags &= ~TF_OPENCLOSE;
303 cv_broadcast(&tp->t_dcdwait);
304 ttydev_leave(tp);
305
306 return (error);
307}
308
309static int
310ttydev_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
311{
312 struct tty *tp = dev->si_drv1;
313
314 tty_lock(tp);
315
316 /*
317 * Don't actually close the device if it is being used as the
318 * console.
319 */
320 MPASS((tp->t_flags & TF_OPENED) != TF_OPENED);
321 if (dev == dev_console)
322 tp->t_flags &= ~TF_OPENED_CONS;
323 else
324 tp->t_flags &= ~(TF_OPENED_IN|TF_OPENED_OUT);
325
326 if (tp->t_flags & TF_OPENED) {
327 tty_unlock(tp);
328 return (0);
329 }
330
331 /*
332 * This can only be called once. The callin and the callout
333 * devices cannot be opened at the same time.
334 */
335 tp->t_flags &= ~(TF_EXCLUDE|TF_STOPPED);
336
337 /* Properly wake up threads that are stuck - revoke(). */
338 tp->t_revokecnt++;
339 tty_wakeup(tp, FREAD|FWRITE);
340 cv_broadcast(&tp->t_bgwait);
341 cv_broadcast(&tp->t_dcdwait);
342
343 ttydev_leave(tp);
344
345 return (0);
346}
347
348static __inline int
349tty_is_ctty(struct tty *tp, struct proc *p)
350{
351 tty_lock_assert(tp, MA_OWNED);
352
353 return (p->p_session == tp->t_session && p->p_flag & P_CONTROLT);
354}
355
356static int
357tty_wait_background(struct tty *tp, struct thread *td, int sig)
358{
359 struct proc *p = td->td_proc;
360 struct pgrp *pg;
361 ksiginfo_t ksi;
362 int error;
363
364 MPASS(sig == SIGTTIN || sig == SIGTTOU);
365 tty_lock_assert(tp, MA_OWNED);
366
367 for (;;) {
368 PROC_LOCK(p);
369 /*
370 * The process should only sleep, when:
371 * - This terminal is the controling terminal
372 * - Its process group is not the foreground process
373 * group
374 * - The parent process isn't waiting for the child to
375 * exit
376 * - the signal to send to the process isn't masked
377 */
378 if (!tty_is_ctty(tp, p) || p->p_pgrp == tp->t_pgrp) {
379 /* Allow the action to happen. */
380 PROC_UNLOCK(p);
381 return (0);
382 }
383
384 if (SIGISMEMBER(p->p_sigacts->ps_sigignore, sig) ||
385 SIGISMEMBER(td->td_sigmask, sig)) {
386 /* Only allow them in write()/ioctl(). */
387 PROC_UNLOCK(p);
388 return (sig == SIGTTOU ? 0 : EIO);
389 }
390
391 pg = p->p_pgrp;
392 if (p->p_flag & P_PPWAIT || pg->pg_jobc == 0) {
393 /* Don't allow the action to happen. */
394 PROC_UNLOCK(p);
395 return (EIO);
396 }
397 PROC_UNLOCK(p);
398
399 /*
400 * Send the signal and sleep until we're the new
401 * foreground process group.
402 */
403 if (sig != 0) {
404 ksiginfo_init(&ksi);
405 ksi.ksi_code = SI_KERNEL;
406 ksi.ksi_signo = sig;
407 sig = 0;
408 }
409 PGRP_LOCK(pg);
410 pgsignal(pg, ksi.ksi_signo, 1, &ksi);
411 PGRP_UNLOCK(pg);
412
413 error = tty_wait(tp, &tp->t_bgwait);
414 if (error)
415 return (error);
416 }
417}
418
419static int
420ttydev_read(struct cdev *dev, struct uio *uio, int ioflag)
421{
422 struct tty *tp = dev->si_drv1;
423 int error;
424
425 error = ttydev_enter(tp);
426 if (error)
427 goto done;
428
429 error = tty_wait_background(tp, curthread, SIGTTIN);
430 if (error) {
431 tty_unlock(tp);
432 goto done;
433 }
434
435 error = ttydisc_read(tp, uio, ioflag);
436 tty_unlock(tp);
437
438 /*
439 * The read() call should not throw an error when the device is
440 * being destroyed. Silently convert it to an EOF.
441 */
442done: if (error == ENXIO)
443 error = 0;
444 return (error);
445}
446
447static int
448ttydev_write(struct cdev *dev, struct uio *uio, int ioflag)
449{
450 struct tty *tp = dev->si_drv1;
451 int error;
452
453 error = ttydev_enter(tp);
454 if (error)
455 return (error);
456
457 if (tp->t_termios.c_lflag & TOSTOP) {
458 error = tty_wait_background(tp, curthread, SIGTTOU);
459 if (error)
460 goto done;
461 }
462
463 if (ioflag & IO_NDELAY && tp->t_flags & TF_BUSY_OUT) {
464 /* Allow non-blocking writes to bypass serialization. */
465 error = ttydisc_write(tp, uio, ioflag);
466 } else {
467 /* Serialize write() calls. */
468 while (tp->t_flags & TF_BUSY_OUT) {
469 error = tty_wait(tp, &tp->t_outserwait);
470 if (error)
471 goto done;
472 }
| 32
33#include "opt_compat.h"
34
35#include <sys/param.h>
36#include <sys/conf.h>
37#include <sys/cons.h>
38#include <sys/fcntl.h>
39#include <sys/file.h>
40#include <sys/filedesc.h>
41#include <sys/filio.h>
42#ifdef COMPAT_43TTY
43#include <sys/ioctl_compat.h>
44#endif /* COMPAT_43TTY */
45#include <sys/kernel.h>
46#include <sys/limits.h>
47#include <sys/malloc.h>
48#include <sys/mount.h>
49#include <sys/poll.h>
50#include <sys/priv.h>
51#include <sys/proc.h>
52#include <sys/serial.h>
53#include <sys/signal.h>
54#include <sys/stat.h>
55#include <sys/sx.h>
56#include <sys/sysctl.h>
57#include <sys/systm.h>
58#include <sys/tty.h>
59#include <sys/ttycom.h>
60#define TTYDEFCHARS
61#include <sys/ttydefaults.h>
62#undef TTYDEFCHARS
63#include <sys/ucred.h>
64#include <sys/vnode.h>
65
66#include <machine/stdarg.h>
67
68static MALLOC_DEFINE(M_TTY, "tty", "tty device");
69
70static void tty_rel_free(struct tty *tp);
71
72static TAILQ_HEAD(, tty) tty_list = TAILQ_HEAD_INITIALIZER(tty_list);
73static struct sx tty_list_sx;
74SX_SYSINIT(tty_list, &tty_list_sx, "tty list");
75static unsigned int tty_list_count = 0;
76
77/* Character device of /dev/console. */
78static struct cdev *dev_console;
79static const char *dev_console_filename;
80
81/*
82 * Flags that are supported and stored by this implementation.
83 */
84#define TTYSUP_IFLAG (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|ISTRIP|\
85 INLCR|IGNCR|ICRNL|IXON|IXOFF|IXANY|IMAXBEL)
86#define TTYSUP_OFLAG (OPOST|ONLCR|TAB3|ONOEOT|OCRNL|ONOCR|ONLRET)
87#define TTYSUP_LFLAG (ECHOKE|ECHOE|ECHOK|ECHO|ECHONL|ECHOPRT|\
88 ECHOCTL|ISIG|ICANON|ALTWERASE|IEXTEN|TOSTOP|\
89 FLUSHO|NOKERNINFO|NOFLSH)
90#define TTYSUP_CFLAG (CIGNORE|CSIZE|CSTOPB|CREAD|PARENB|PARODD|\
91 HUPCL|CLOCAL|CCTS_OFLOW|CRTS_IFLOW|CDTR_IFLOW|\
92 CDSR_OFLOW|CCAR_OFLOW)
93
94#define TTY_CALLOUT(tp,d) ((d) != (tp)->t_dev && (d) != dev_console)
95
96/*
97 * Set TTY buffer sizes.
98 */
99
100#define TTYBUF_MAX 65536
101
102static void
103tty_watermarks(struct tty *tp)
104{
105 size_t bs = 0;
106
107 /* Provide an input buffer for 0.2 seconds of data. */
108 if (tp->t_termios.c_cflag & CREAD)
109 bs = MIN(tp->t_termios.c_ispeed / 5, TTYBUF_MAX);
110 ttyinq_setsize(&tp->t_inq, tp, bs);
111
112 /* Set low watermark at 10% (when 90% is available). */
113 tp->t_inlow = (ttyinq_getallocatedsize(&tp->t_inq) * 9) / 10;
114
115 /* Provide an ouput buffer for 0.2 seconds of data. */
116 bs = MIN(tp->t_termios.c_ospeed / 5, TTYBUF_MAX);
117 ttyoutq_setsize(&tp->t_outq, tp, bs);
118
119 /* Set low watermark at 10% (when 90% is available). */
120 tp->t_outlow = (ttyoutq_getallocatedsize(&tp->t_outq) * 9) / 10;
121}
122
123static int
124tty_drain(struct tty *tp)
125{
126 int error;
127
128 if (ttyhook_hashook(tp, getc_inject))
129 /* buffer is inaccessible */
130 return (0);
131
132 while (ttyoutq_bytesused(&tp->t_outq) > 0) {
133 ttydevsw_outwakeup(tp);
134 /* Could be handled synchronously. */
135 if (ttyoutq_bytesused(&tp->t_outq) == 0)
136 return (0);
137
138 /* Wait for data to be drained. */
139 error = tty_wait(tp, &tp->t_outwait);
140 if (error)
141 return (error);
142 }
143
144 return (0);
145}
146
147/*
148 * Though ttydev_enter() and ttydev_leave() seem to be related, they
149 * don't have to be used together. ttydev_enter() is used by the cdev
150 * operations to prevent an actual operation from being processed when
151 * the TTY has been abandoned. ttydev_leave() is used by ttydev_open()
152 * and ttydev_close() to determine whether per-TTY data should be
153 * deallocated.
154 */
155
156static __inline int
157ttydev_enter(struct tty *tp)
158{
159 tty_lock(tp);
160
161 if (tty_gone(tp) || !tty_opened(tp)) {
162 /* Device is already gone. */
163 tty_unlock(tp);
164 return (ENXIO);
165 }
166
167 return (0);
168}
169
170static void
171ttydev_leave(struct tty *tp)
172{
173 tty_lock_assert(tp, MA_OWNED);
174
175 if (tty_opened(tp) || tp->t_flags & TF_OPENCLOSE) {
176 /* Device is still opened somewhere. */
177 tty_unlock(tp);
178 return;
179 }
180
181 tp->t_flags |= TF_OPENCLOSE;
182
183 /* Stop asynchronous I/O. */
184 funsetown(&tp->t_sigio);
185
186 /* Remove console TTY. */
187 if (constty == tp)
188 constty_clear();
189
190 /* Drain any output. */
191 MPASS((tp->t_flags & TF_STOPPED) == 0);
192 if (!tty_gone(tp))
193 tty_drain(tp);
194
195 ttydisc_close(tp);
196
197 /* Destroy associated buffers already. */
198 ttyinq_free(&tp->t_inq);
199 tp->t_inlow = 0;
200 ttyoutq_free(&tp->t_outq);
201 tp->t_outlow = 0;
202
203 knlist_clear(&tp->t_inpoll.si_note, 1);
204 knlist_clear(&tp->t_outpoll.si_note, 1);
205
206 if (!tty_gone(tp))
207 ttydevsw_close(tp);
208
209 tp->t_flags &= ~TF_OPENCLOSE;
210 cv_broadcast(&tp->t_dcdwait);
211 tty_rel_free(tp);
212}
213
214/*
215 * Operations that are exposed through the character device in /dev.
216 */
217static int
218ttydev_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
219{
220 struct tty *tp = dev->si_drv1;
221 int error = 0;
222
223 tty_lock(tp);
224 if (tty_gone(tp)) {
225 /* Device is already gone. */
226 tty_unlock(tp);
227 return (ENXIO);
228 }
229
230 /*
231 * Block when other processes are currently opening or closing
232 * the TTY.
233 */
234 while (tp->t_flags & TF_OPENCLOSE) {
235 error = tty_wait(tp, &tp->t_dcdwait);
236 if (error != 0) {
237 tty_unlock(tp);
238 return (error);
239 }
240 }
241 tp->t_flags |= TF_OPENCLOSE;
242
243 /*
244 * Make sure the "tty" and "cua" device cannot be opened at the
245 * same time.
246 */
247 if (TTY_CALLOUT(tp, dev)) {
248 if (tp->t_flags & TF_OPENED_IN) {
249 error = EBUSY;
250 goto done;
251 }
252 } else {
253 if (tp->t_flags & TF_OPENED_OUT) {
254 error = EBUSY;
255 goto done;
256 }
257 }
258
259 if (tp->t_flags & TF_EXCLUDE && priv_check(td, PRIV_TTY_EXCLUSIVE)) {
260 error = EBUSY;
261 goto done;
262 }
263
264 if (!tty_opened(tp)) {
265 /* Set proper termios flags. */
266 if (TTY_CALLOUT(tp, dev))
267 tp->t_termios = tp->t_termios_init_out;
268 else
269 tp->t_termios = tp->t_termios_init_in;
270 ttydevsw_param(tp, &tp->t_termios);
271 /* Prevent modem control on callout devices and /dev/console. */
272 if (TTY_CALLOUT(tp, dev) || dev == dev_console)
273 tp->t_termios.c_cflag |= CLOCAL;
274
275 ttydevsw_modem(tp, SER_DTR|SER_RTS, 0);
276
277 error = ttydevsw_open(tp);
278 if (error != 0)
279 goto done;
280
281 ttydisc_open(tp);
282 tty_watermarks(tp);
283 }
284
285 /* Wait for Carrier Detect. */
286 if ((oflags & O_NONBLOCK) == 0 &&
287 (tp->t_termios.c_cflag & CLOCAL) == 0) {
288 while ((ttydevsw_modem(tp, 0, 0) & SER_DCD) == 0) {
289 error = tty_wait(tp, &tp->t_dcdwait);
290 if (error != 0)
291 goto done;
292 }
293 }
294
295 if (dev == dev_console)
296 tp->t_flags |= TF_OPENED_CONS;
297 else if (TTY_CALLOUT(tp, dev))
298 tp->t_flags |= TF_OPENED_OUT;
299 else
300 tp->t_flags |= TF_OPENED_IN;
301
302done: tp->t_flags &= ~TF_OPENCLOSE;
303 cv_broadcast(&tp->t_dcdwait);
304 ttydev_leave(tp);
305
306 return (error);
307}
308
309static int
310ttydev_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
311{
312 struct tty *tp = dev->si_drv1;
313
314 tty_lock(tp);
315
316 /*
317 * Don't actually close the device if it is being used as the
318 * console.
319 */
320 MPASS((tp->t_flags & TF_OPENED) != TF_OPENED);
321 if (dev == dev_console)
322 tp->t_flags &= ~TF_OPENED_CONS;
323 else
324 tp->t_flags &= ~(TF_OPENED_IN|TF_OPENED_OUT);
325
326 if (tp->t_flags & TF_OPENED) {
327 tty_unlock(tp);
328 return (0);
329 }
330
331 /*
332 * This can only be called once. The callin and the callout
333 * devices cannot be opened at the same time.
334 */
335 tp->t_flags &= ~(TF_EXCLUDE|TF_STOPPED);
336
337 /* Properly wake up threads that are stuck - revoke(). */
338 tp->t_revokecnt++;
339 tty_wakeup(tp, FREAD|FWRITE);
340 cv_broadcast(&tp->t_bgwait);
341 cv_broadcast(&tp->t_dcdwait);
342
343 ttydev_leave(tp);
344
345 return (0);
346}
347
348static __inline int
349tty_is_ctty(struct tty *tp, struct proc *p)
350{
351 tty_lock_assert(tp, MA_OWNED);
352
353 return (p->p_session == tp->t_session && p->p_flag & P_CONTROLT);
354}
355
356static int
357tty_wait_background(struct tty *tp, struct thread *td, int sig)
358{
359 struct proc *p = td->td_proc;
360 struct pgrp *pg;
361 ksiginfo_t ksi;
362 int error;
363
364 MPASS(sig == SIGTTIN || sig == SIGTTOU);
365 tty_lock_assert(tp, MA_OWNED);
366
367 for (;;) {
368 PROC_LOCK(p);
369 /*
370 * The process should only sleep, when:
371 * - This terminal is the controling terminal
372 * - Its process group is not the foreground process
373 * group
374 * - The parent process isn't waiting for the child to
375 * exit
376 * - the signal to send to the process isn't masked
377 */
378 if (!tty_is_ctty(tp, p) || p->p_pgrp == tp->t_pgrp) {
379 /* Allow the action to happen. */
380 PROC_UNLOCK(p);
381 return (0);
382 }
383
384 if (SIGISMEMBER(p->p_sigacts->ps_sigignore, sig) ||
385 SIGISMEMBER(td->td_sigmask, sig)) {
386 /* Only allow them in write()/ioctl(). */
387 PROC_UNLOCK(p);
388 return (sig == SIGTTOU ? 0 : EIO);
389 }
390
391 pg = p->p_pgrp;
392 if (p->p_flag & P_PPWAIT || pg->pg_jobc == 0) {
393 /* Don't allow the action to happen. */
394 PROC_UNLOCK(p);
395 return (EIO);
396 }
397 PROC_UNLOCK(p);
398
399 /*
400 * Send the signal and sleep until we're the new
401 * foreground process group.
402 */
403 if (sig != 0) {
404 ksiginfo_init(&ksi);
405 ksi.ksi_code = SI_KERNEL;
406 ksi.ksi_signo = sig;
407 sig = 0;
408 }
409 PGRP_LOCK(pg);
410 pgsignal(pg, ksi.ksi_signo, 1, &ksi);
411 PGRP_UNLOCK(pg);
412
413 error = tty_wait(tp, &tp->t_bgwait);
414 if (error)
415 return (error);
416 }
417}
418
419static int
420ttydev_read(struct cdev *dev, struct uio *uio, int ioflag)
421{
422 struct tty *tp = dev->si_drv1;
423 int error;
424
425 error = ttydev_enter(tp);
426 if (error)
427 goto done;
428
429 error = tty_wait_background(tp, curthread, SIGTTIN);
430 if (error) {
431 tty_unlock(tp);
432 goto done;
433 }
434
435 error = ttydisc_read(tp, uio, ioflag);
436 tty_unlock(tp);
437
438 /*
439 * The read() call should not throw an error when the device is
440 * being destroyed. Silently convert it to an EOF.
441 */
442done: if (error == ENXIO)
443 error = 0;
444 return (error);
445}
446
447static int
448ttydev_write(struct cdev *dev, struct uio *uio, int ioflag)
449{
450 struct tty *tp = dev->si_drv1;
451 int error;
452
453 error = ttydev_enter(tp);
454 if (error)
455 return (error);
456
457 if (tp->t_termios.c_lflag & TOSTOP) {
458 error = tty_wait_background(tp, curthread, SIGTTOU);
459 if (error)
460 goto done;
461 }
462
463 if (ioflag & IO_NDELAY && tp->t_flags & TF_BUSY_OUT) {
464 /* Allow non-blocking writes to bypass serialization. */
465 error = ttydisc_write(tp, uio, ioflag);
466 } else {
467 /* Serialize write() calls. */
468 while (tp->t_flags & TF_BUSY_OUT) {
469 error = tty_wait(tp, &tp->t_outserwait);
470 if (error)
471 goto done;
472 }
|
473
474 tp->t_flags |= TF_BUSY_OUT;
| 473
474 tp->t_flags |= TF_BUSY_OUT;
|
475 error = ttydisc_write(tp, uio, ioflag);
| 475 error = ttydisc_write(tp, uio, ioflag);
|
476 tp->t_flags &= ~TF_BUSY_OUT;
| 476 tp->t_flags &= ~TF_BUSY_OUT;
|
477 cv_signal(&tp->t_outserwait);
478 }
479
480done: tty_unlock(tp);
481 return (error);
482}
483
484static int
485ttydev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
486 struct thread *td)
487{
488 struct tty *tp = dev->si_drv1;
489 int error;
490
491 error = ttydev_enter(tp);
492 if (error)
493 return (error);
494
495 switch (cmd) {
496 case TIOCCBRK:
497 case TIOCCONS:
498 case TIOCDRAIN:
499 case TIOCEXCL:
500 case TIOCFLUSH:
501 case TIOCNXCL:
502 case TIOCSBRK:
503 case TIOCSCTTY:
504 case TIOCSETA:
505 case TIOCSETAF:
506 case TIOCSETAW:
507 case TIOCSPGRP:
508 case TIOCSTART:
509 case TIOCSTAT:
510 case TIOCSTI:
511 case TIOCSTOP:
512 case TIOCSWINSZ:
513#if 0
514 case TIOCSDRAINWAIT:
515 case TIOCSETD:
516#endif
517#ifdef COMPAT_43TTY
518 case TIOCLBIC:
519 case TIOCLBIS:
520 case TIOCLSET:
521 case TIOCSETC:
522 case OTIOCSETD:
523 case TIOCSETN:
524 case TIOCSETP:
525 case TIOCSLTC:
526#endif /* COMPAT_43TTY */
527 /*
528 * If the ioctl() causes the TTY to be modified, let it
529 * wait in the background.
530 */
531 error = tty_wait_background(tp, curthread, SIGTTOU);
532 if (error)
533 goto done;
534 }
535
536 if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
537 struct termios *old = &tp->t_termios;
538 struct termios *new = (struct termios *)data;
539 struct termios *lock = TTY_CALLOUT(tp, dev) ?
540 &tp->t_termios_lock_out : &tp->t_termios_lock_in;
541 int cc;
542
543 /*
544 * Lock state devices. Just overwrite the values of the
545 * commands that are currently in use.
546 */
547 new->c_iflag = (old->c_iflag & lock->c_iflag) |
548 (new->c_iflag & ~lock->c_iflag);
549 new->c_oflag = (old->c_oflag & lock->c_oflag) |
550 (new->c_oflag & ~lock->c_oflag);
551 new->c_cflag = (old->c_cflag & lock->c_cflag) |
552 (new->c_cflag & ~lock->c_cflag);
553 new->c_lflag = (old->c_lflag & lock->c_lflag) |
554 (new->c_lflag & ~lock->c_lflag);
555 for (cc = 0; cc < NCCS; ++cc)
556 if (lock->c_cc[cc])
557 new->c_cc[cc] = old->c_cc[cc];
558 if (lock->c_ispeed)
559 new->c_ispeed = old->c_ispeed;
560 if (lock->c_ospeed)
561 new->c_ospeed = old->c_ospeed;
562 }
563
564 error = tty_ioctl(tp, cmd, data, fflag, td);
565done: tty_unlock(tp);
566
567 return (error);
568}
569
570static int
571ttydev_poll(struct cdev *dev, int events, struct thread *td)
572{
573 struct tty *tp = dev->si_drv1;
574 int error, revents = 0;
575
576 error = ttydev_enter(tp);
577 if (error)
578 return ((events & (POLLIN|POLLRDNORM)) | POLLHUP);
579
580 if (events & (POLLIN|POLLRDNORM)) {
581 /* See if we can read something. */
582 if (ttydisc_read_poll(tp) > 0)
583 revents |= events & (POLLIN|POLLRDNORM);
584 }
585
586 if (tp->t_flags & TF_ZOMBIE) {
587 /* Hangup flag on zombie state. */
588 revents |= POLLHUP;
589 } else if (events & (POLLOUT|POLLWRNORM)) {
590 /* See if we can write something. */
591 if (ttydisc_write_poll(tp) > 0)
592 revents |= events & (POLLOUT|POLLWRNORM);
593 }
594
595 if (revents == 0) {
596 if (events & (POLLIN|POLLRDNORM))
597 selrecord(td, &tp->t_inpoll);
598 if (events & (POLLOUT|POLLWRNORM))
599 selrecord(td, &tp->t_outpoll);
600 }
601
602 tty_unlock(tp);
603
604 return (revents);
605}
606
607static int
608ttydev_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr,
609 int nprot, vm_memattr_t *memattr)
610{
611 struct tty *tp = dev->si_drv1;
612 int error;
613
614 /* Handle mmap() through the driver. */
615
616 error = ttydev_enter(tp);
617 if (error)
618 return (-1);
619 error = ttydevsw_mmap(tp, offset, paddr, nprot, memattr);
620 tty_unlock(tp);
621
622 return (error);
623}
624
625/*
626 * kqueue support.
627 */
628
629static void
630tty_kqops_read_detach(struct knote *kn)
631{
632 struct tty *tp = kn->kn_hook;
633
634 knlist_remove(&tp->t_inpoll.si_note, kn, 0);
635}
636
637static int
638tty_kqops_read_event(struct knote *kn, long hint)
639{
640 struct tty *tp = kn->kn_hook;
641
642 tty_lock_assert(tp, MA_OWNED);
643
644 if (tty_gone(tp) || tp->t_flags & TF_ZOMBIE) {
645 kn->kn_flags |= EV_EOF;
646 return (1);
647 } else {
648 kn->kn_data = ttydisc_read_poll(tp);
649 return (kn->kn_data > 0);
650 }
651}
652
653static void
654tty_kqops_write_detach(struct knote *kn)
655{
656 struct tty *tp = kn->kn_hook;
657
658 knlist_remove(&tp->t_outpoll.si_note, kn, 0);
659}
660
661static int
662tty_kqops_write_event(struct knote *kn, long hint)
663{
664 struct tty *tp = kn->kn_hook;
665
666 tty_lock_assert(tp, MA_OWNED);
667
668 if (tty_gone(tp)) {
669 kn->kn_flags |= EV_EOF;
670 return (1);
671 } else {
672 kn->kn_data = ttydisc_write_poll(tp);
673 return (kn->kn_data > 0);
674 }
675}
676
677static struct filterops tty_kqops_read = {
678 .f_isfd = 1,
679 .f_detach = tty_kqops_read_detach,
680 .f_event = tty_kqops_read_event,
681};
682static struct filterops tty_kqops_write = {
683 .f_isfd = 1,
684 .f_detach = tty_kqops_write_detach,
685 .f_event = tty_kqops_write_event,
686};
687
688static int
689ttydev_kqfilter(struct cdev *dev, struct knote *kn)
690{
691 struct tty *tp = dev->si_drv1;
692 int error;
693
694 error = ttydev_enter(tp);
695 if (error)
696 return (error);
697
698 switch (kn->kn_filter) {
699 case EVFILT_READ:
700 kn->kn_hook = tp;
701 kn->kn_fop = &tty_kqops_read;
702 knlist_add(&tp->t_inpoll.si_note, kn, 1);
703 break;
704 case EVFILT_WRITE:
705 kn->kn_hook = tp;
706 kn->kn_fop = &tty_kqops_write;
707 knlist_add(&tp->t_outpoll.si_note, kn, 1);
708 break;
709 default:
710 error = EINVAL;
711 break;
712 }
713
714 tty_unlock(tp);
715 return (error);
716}
717
718static struct cdevsw ttydev_cdevsw = {
719 .d_version = D_VERSION,
720 .d_open = ttydev_open,
721 .d_close = ttydev_close,
722 .d_read = ttydev_read,
723 .d_write = ttydev_write,
724 .d_ioctl = ttydev_ioctl,
725 .d_kqfilter = ttydev_kqfilter,
726 .d_poll = ttydev_poll,
727 .d_mmap = ttydev_mmap,
728 .d_name = "ttydev",
729 .d_flags = D_TTY,
730};
731
732/*
733 * Init/lock-state devices
734 */
735
736static int
737ttyil_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
738{
739 struct tty *tp = dev->si_drv1;
740 int error = 0;
741
742 tty_lock(tp);
743 if (tty_gone(tp))
744 error = ENODEV;
745 tty_unlock(tp);
746
747 return (error);
748}
749
750static int
751ttyil_close(struct cdev *dev, int flag, int mode, struct thread *td)
752{
753 return (0);
754}
755
756static int
757ttyil_rdwr(struct cdev *dev, struct uio *uio, int ioflag)
758{
759 return (ENODEV);
760}
761
762static int
763ttyil_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
764 struct thread *td)
765{
766 struct tty *tp = dev->si_drv1;
767 int error = 0;
768
769 tty_lock(tp);
770 if (tty_gone(tp)) {
771 error = ENODEV;
772 goto done;
773 }
774
775 switch (cmd) {
776 case TIOCGETA:
777 /* Obtain terminal flags through tcgetattr(). */
778 *(struct termios*)data = *(struct termios*)dev->si_drv2;
779 break;
780 case TIOCSETA:
781 /* Set terminal flags through tcsetattr(). */
782 error = priv_check(td, PRIV_TTY_SETA);
783 if (error)
784 break;
785 *(struct termios*)dev->si_drv2 = *(struct termios*)data;
786 break;
787 case TIOCGETD:
788 *(int *)data = TTYDISC;
789 break;
790 case TIOCGWINSZ:
791 bzero(data, sizeof(struct winsize));
792 break;
793 default:
794 error = ENOTTY;
795 }
796
797done: tty_unlock(tp);
798 return (error);
799}
800
801static struct cdevsw ttyil_cdevsw = {
802 .d_version = D_VERSION,
803 .d_open = ttyil_open,
804 .d_close = ttyil_close,
805 .d_read = ttyil_rdwr,
806 .d_write = ttyil_rdwr,
807 .d_ioctl = ttyil_ioctl,
808 .d_name = "ttyil",
809 .d_flags = D_TTY,
810};
811
812static void
813tty_init_termios(struct tty *tp)
814{
815 struct termios *t = &tp->t_termios_init_in;
816
817 t->c_cflag = TTYDEF_CFLAG;
818 t->c_iflag = TTYDEF_IFLAG;
819 t->c_lflag = TTYDEF_LFLAG;
820 t->c_oflag = TTYDEF_OFLAG;
821 t->c_ispeed = TTYDEF_SPEED;
822 t->c_ospeed = TTYDEF_SPEED;
823 memcpy(&t->c_cc, ttydefchars, sizeof ttydefchars);
824
825 tp->t_termios_init_out = *t;
826}
827
828void
829tty_init_console(struct tty *tp, speed_t s)
830{
831 struct termios *ti = &tp->t_termios_init_in;
832 struct termios *to = &tp->t_termios_init_out;
833
834 if (s != 0) {
835 ti->c_ispeed = ti->c_ospeed = s;
836 to->c_ispeed = to->c_ospeed = s;
837 }
838
839 ti->c_cflag |= CLOCAL;
840 to->c_cflag |= CLOCAL;
841}
842
843/*
844 * Standard device routine implementations, mostly meant for
845 * pseudo-terminal device drivers. When a driver creates a new terminal
846 * device class, missing routines are patched.
847 */
848
849static int
850ttydevsw_defopen(struct tty *tp)
851{
852
853 return (0);
854}
855
856static void
857ttydevsw_defclose(struct tty *tp)
858{
859}
860
861static void
862ttydevsw_defoutwakeup(struct tty *tp)
863{
864
865 panic("Terminal device has output, while not implemented");
866}
867
868static void
869ttydevsw_definwakeup(struct tty *tp)
870{
871}
872
873static int
874ttydevsw_defioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td)
875{
876
877 return (ENOIOCTL);
878}
879
880static int
881ttydevsw_defparam(struct tty *tp, struct termios *t)
882{
883
884 /*
885 * Allow the baud rate to be adjusted for pseudo-devices, but at
886 * least restrict it to 115200 to prevent excessive buffer
887 * usage. Also disallow 0, to prevent foot shooting.
888 */
889 if (t->c_ispeed < B50)
890 t->c_ispeed = B50;
891 else if (t->c_ispeed > B115200)
892 t->c_ispeed = B115200;
893 if (t->c_ospeed < B50)
894 t->c_ospeed = B50;
895 else if (t->c_ospeed > B115200)
896 t->c_ospeed = B115200;
897 t->c_cflag |= CREAD;
898
899 return (0);
900}
901
902static int
903ttydevsw_defmodem(struct tty *tp, int sigon, int sigoff)
904{
905
906 /* Simulate a carrier to make the TTY layer happy. */
907 return (SER_DCD);
908}
909
910static int
911ttydevsw_defmmap(struct tty *tp, vm_ooffset_t offset, vm_paddr_t *paddr,
912 int nprot, vm_memattr_t *memattr)
913{
914
915 return (-1);
916}
917
918static void
919ttydevsw_defpktnotify(struct tty *tp, char event)
920{
921}
922
923static void
924ttydevsw_deffree(void *softc)
925{
926
927 panic("Terminal device freed without a free-handler");
928}
929
930/*
931 * TTY allocation and deallocation. TTY devices can be deallocated when
932 * the driver doesn't use it anymore, when the TTY isn't a session's
933 * controlling TTY and when the device node isn't opened through devfs.
934 */
935
936struct tty *
937tty_alloc(struct ttydevsw *tsw, void *sc)
938{
939
940 return (tty_alloc_mutex(tsw, sc, NULL));
941}
942
943struct tty *
944tty_alloc_mutex(struct ttydevsw *tsw, void *sc, struct mtx *mutex)
945{
946 struct tty *tp;
947
948 /* Make sure the driver defines all routines. */
949#define PATCH_FUNC(x) do { \
950 if (tsw->tsw_ ## x == NULL) \
951 tsw->tsw_ ## x = ttydevsw_def ## x; \
952} while (0)
953 PATCH_FUNC(open);
954 PATCH_FUNC(close);
955 PATCH_FUNC(outwakeup);
956 PATCH_FUNC(inwakeup);
957 PATCH_FUNC(ioctl);
958 PATCH_FUNC(param);
959 PATCH_FUNC(modem);
960 PATCH_FUNC(mmap);
961 PATCH_FUNC(pktnotify);
962 PATCH_FUNC(free);
963#undef PATCH_FUNC
964
965 tp = malloc(sizeof(struct tty), M_TTY, M_WAITOK|M_ZERO);
966 tp->t_devsw = tsw;
967 tp->t_devswsoftc = sc;
968 tp->t_flags = tsw->tsw_flags;
969
970 tty_init_termios(tp);
971
972 cv_init(&tp->t_inwait, "ttyin");
973 cv_init(&tp->t_outwait, "ttyout");
974 cv_init(&tp->t_outserwait, "ttyosr");
975 cv_init(&tp->t_bgwait, "ttybg");
976 cv_init(&tp->t_dcdwait, "ttydcd");
977
978 /* Allow drivers to use a custom mutex to lock the TTY. */
979 if (mutex != NULL) {
980 tp->t_mtx = mutex;
981 } else {
982 tp->t_mtx = &tp->t_mtxobj;
983 mtx_init(&tp->t_mtxobj, "ttymtx", NULL, MTX_DEF);
984 }
985
986 knlist_init_mtx(&tp->t_inpoll.si_note, tp->t_mtx);
987 knlist_init_mtx(&tp->t_outpoll.si_note, tp->t_mtx);
988
989 sx_xlock(&tty_list_sx);
990 TAILQ_INSERT_TAIL(&tty_list, tp, t_list);
991 tty_list_count++;
992 sx_xunlock(&tty_list_sx);
993
994 return (tp);
995}
996
997static void
998tty_dealloc(void *arg)
999{
1000 struct tty *tp = arg;
1001
1002 sx_xlock(&tty_list_sx);
1003 TAILQ_REMOVE(&tty_list, tp, t_list);
1004 tty_list_count--;
1005 sx_xunlock(&tty_list_sx);
1006
1007 /* Make sure we haven't leaked buffers. */
1008 MPASS(ttyinq_getsize(&tp->t_inq) == 0);
1009 MPASS(ttyoutq_getsize(&tp->t_outq) == 0);
1010
1011 knlist_destroy(&tp->t_inpoll.si_note);
1012 knlist_destroy(&tp->t_outpoll.si_note);
1013
1014 cv_destroy(&tp->t_inwait);
1015 cv_destroy(&tp->t_outwait);
1016 cv_destroy(&tp->t_bgwait);
1017 cv_destroy(&tp->t_dcdwait);
1018 cv_destroy(&tp->t_outserwait);
1019
1020 if (tp->t_mtx == &tp->t_mtxobj)
1021 mtx_destroy(&tp->t_mtxobj);
1022 ttydevsw_free(tp);
1023 free(tp, M_TTY);
1024}
1025
1026static void
1027tty_rel_free(struct tty *tp)
1028{
1029 struct cdev *dev;
1030
1031 tty_lock_assert(tp, MA_OWNED);
1032
1033#define TF_ACTIVITY (TF_GONE|TF_OPENED|TF_HOOK|TF_OPENCLOSE)
1034 if (tp->t_sessioncnt != 0 || (tp->t_flags & TF_ACTIVITY) != TF_GONE) {
1035 /* TTY is still in use. */
1036 tty_unlock(tp);
1037 return;
1038 }
1039
1040 /* TTY can be deallocated. */
1041 dev = tp->t_dev;
1042 tp->t_dev = NULL;
1043 tty_unlock(tp);
1044
1045 if (dev != NULL)
1046 destroy_dev_sched_cb(dev, tty_dealloc, tp);
1047}
1048
1049void
1050tty_rel_pgrp(struct tty *tp, struct pgrp *pg)
1051{
1052 MPASS(tp->t_sessioncnt > 0);
1053 tty_lock_assert(tp, MA_OWNED);
1054
1055 if (tp->t_pgrp == pg)
1056 tp->t_pgrp = NULL;
| 477 cv_signal(&tp->t_outserwait);
478 }
479
480done: tty_unlock(tp);
481 return (error);
482}
483
484static int
485ttydev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
486 struct thread *td)
487{
488 struct tty *tp = dev->si_drv1;
489 int error;
490
491 error = ttydev_enter(tp);
492 if (error)
493 return (error);
494
495 switch (cmd) {
496 case TIOCCBRK:
497 case TIOCCONS:
498 case TIOCDRAIN:
499 case TIOCEXCL:
500 case TIOCFLUSH:
501 case TIOCNXCL:
502 case TIOCSBRK:
503 case TIOCSCTTY:
504 case TIOCSETA:
505 case TIOCSETAF:
506 case TIOCSETAW:
507 case TIOCSPGRP:
508 case TIOCSTART:
509 case TIOCSTAT:
510 case TIOCSTI:
511 case TIOCSTOP:
512 case TIOCSWINSZ:
513#if 0
514 case TIOCSDRAINWAIT:
515 case TIOCSETD:
516#endif
517#ifdef COMPAT_43TTY
518 case TIOCLBIC:
519 case TIOCLBIS:
520 case TIOCLSET:
521 case TIOCSETC:
522 case OTIOCSETD:
523 case TIOCSETN:
524 case TIOCSETP:
525 case TIOCSLTC:
526#endif /* COMPAT_43TTY */
527 /*
528 * If the ioctl() causes the TTY to be modified, let it
529 * wait in the background.
530 */
531 error = tty_wait_background(tp, curthread, SIGTTOU);
532 if (error)
533 goto done;
534 }
535
536 if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) {
537 struct termios *old = &tp->t_termios;
538 struct termios *new = (struct termios *)data;
539 struct termios *lock = TTY_CALLOUT(tp, dev) ?
540 &tp->t_termios_lock_out : &tp->t_termios_lock_in;
541 int cc;
542
543 /*
544 * Lock state devices. Just overwrite the values of the
545 * commands that are currently in use.
546 */
547 new->c_iflag = (old->c_iflag & lock->c_iflag) |
548 (new->c_iflag & ~lock->c_iflag);
549 new->c_oflag = (old->c_oflag & lock->c_oflag) |
550 (new->c_oflag & ~lock->c_oflag);
551 new->c_cflag = (old->c_cflag & lock->c_cflag) |
552 (new->c_cflag & ~lock->c_cflag);
553 new->c_lflag = (old->c_lflag & lock->c_lflag) |
554 (new->c_lflag & ~lock->c_lflag);
555 for (cc = 0; cc < NCCS; ++cc)
556 if (lock->c_cc[cc])
557 new->c_cc[cc] = old->c_cc[cc];
558 if (lock->c_ispeed)
559 new->c_ispeed = old->c_ispeed;
560 if (lock->c_ospeed)
561 new->c_ospeed = old->c_ospeed;
562 }
563
564 error = tty_ioctl(tp, cmd, data, fflag, td);
565done: tty_unlock(tp);
566
567 return (error);
568}
569
570static int
571ttydev_poll(struct cdev *dev, int events, struct thread *td)
572{
573 struct tty *tp = dev->si_drv1;
574 int error, revents = 0;
575
576 error = ttydev_enter(tp);
577 if (error)
578 return ((events & (POLLIN|POLLRDNORM)) | POLLHUP);
579
580 if (events & (POLLIN|POLLRDNORM)) {
581 /* See if we can read something. */
582 if (ttydisc_read_poll(tp) > 0)
583 revents |= events & (POLLIN|POLLRDNORM);
584 }
585
586 if (tp->t_flags & TF_ZOMBIE) {
587 /* Hangup flag on zombie state. */
588 revents |= POLLHUP;
589 } else if (events & (POLLOUT|POLLWRNORM)) {
590 /* See if we can write something. */
591 if (ttydisc_write_poll(tp) > 0)
592 revents |= events & (POLLOUT|POLLWRNORM);
593 }
594
595 if (revents == 0) {
596 if (events & (POLLIN|POLLRDNORM))
597 selrecord(td, &tp->t_inpoll);
598 if (events & (POLLOUT|POLLWRNORM))
599 selrecord(td, &tp->t_outpoll);
600 }
601
602 tty_unlock(tp);
603
604 return (revents);
605}
606
607static int
608ttydev_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr,
609 int nprot, vm_memattr_t *memattr)
610{
611 struct tty *tp = dev->si_drv1;
612 int error;
613
614 /* Handle mmap() through the driver. */
615
616 error = ttydev_enter(tp);
617 if (error)
618 return (-1);
619 error = ttydevsw_mmap(tp, offset, paddr, nprot, memattr);
620 tty_unlock(tp);
621
622 return (error);
623}
624
625/*
626 * kqueue support.
627 */
628
629static void
630tty_kqops_read_detach(struct knote *kn)
631{
632 struct tty *tp = kn->kn_hook;
633
634 knlist_remove(&tp->t_inpoll.si_note, kn, 0);
635}
636
637static int
638tty_kqops_read_event(struct knote *kn, long hint)
639{
640 struct tty *tp = kn->kn_hook;
641
642 tty_lock_assert(tp, MA_OWNED);
643
644 if (tty_gone(tp) || tp->t_flags & TF_ZOMBIE) {
645 kn->kn_flags |= EV_EOF;
646 return (1);
647 } else {
648 kn->kn_data = ttydisc_read_poll(tp);
649 return (kn->kn_data > 0);
650 }
651}
652
653static void
654tty_kqops_write_detach(struct knote *kn)
655{
656 struct tty *tp = kn->kn_hook;
657
658 knlist_remove(&tp->t_outpoll.si_note, kn, 0);
659}
660
661static int
662tty_kqops_write_event(struct knote *kn, long hint)
663{
664 struct tty *tp = kn->kn_hook;
665
666 tty_lock_assert(tp, MA_OWNED);
667
668 if (tty_gone(tp)) {
669 kn->kn_flags |= EV_EOF;
670 return (1);
671 } else {
672 kn->kn_data = ttydisc_write_poll(tp);
673 return (kn->kn_data > 0);
674 }
675}
676
677static struct filterops tty_kqops_read = {
678 .f_isfd = 1,
679 .f_detach = tty_kqops_read_detach,
680 .f_event = tty_kqops_read_event,
681};
682static struct filterops tty_kqops_write = {
683 .f_isfd = 1,
684 .f_detach = tty_kqops_write_detach,
685 .f_event = tty_kqops_write_event,
686};
687
688static int
689ttydev_kqfilter(struct cdev *dev, struct knote *kn)
690{
691 struct tty *tp = dev->si_drv1;
692 int error;
693
694 error = ttydev_enter(tp);
695 if (error)
696 return (error);
697
698 switch (kn->kn_filter) {
699 case EVFILT_READ:
700 kn->kn_hook = tp;
701 kn->kn_fop = &tty_kqops_read;
702 knlist_add(&tp->t_inpoll.si_note, kn, 1);
703 break;
704 case EVFILT_WRITE:
705 kn->kn_hook = tp;
706 kn->kn_fop = &tty_kqops_write;
707 knlist_add(&tp->t_outpoll.si_note, kn, 1);
708 break;
709 default:
710 error = EINVAL;
711 break;
712 }
713
714 tty_unlock(tp);
715 return (error);
716}
717
718static struct cdevsw ttydev_cdevsw = {
719 .d_version = D_VERSION,
720 .d_open = ttydev_open,
721 .d_close = ttydev_close,
722 .d_read = ttydev_read,
723 .d_write = ttydev_write,
724 .d_ioctl = ttydev_ioctl,
725 .d_kqfilter = ttydev_kqfilter,
726 .d_poll = ttydev_poll,
727 .d_mmap = ttydev_mmap,
728 .d_name = "ttydev",
729 .d_flags = D_TTY,
730};
731
732/*
733 * Init/lock-state devices
734 */
735
736static int
737ttyil_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
738{
739 struct tty *tp = dev->si_drv1;
740 int error = 0;
741
742 tty_lock(tp);
743 if (tty_gone(tp))
744 error = ENODEV;
745 tty_unlock(tp);
746
747 return (error);
748}
749
750static int
751ttyil_close(struct cdev *dev, int flag, int mode, struct thread *td)
752{
753 return (0);
754}
755
756static int
757ttyil_rdwr(struct cdev *dev, struct uio *uio, int ioflag)
758{
759 return (ENODEV);
760}
761
762static int
763ttyil_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
764 struct thread *td)
765{
766 struct tty *tp = dev->si_drv1;
767 int error = 0;
768
769 tty_lock(tp);
770 if (tty_gone(tp)) {
771 error = ENODEV;
772 goto done;
773 }
774
775 switch (cmd) {
776 case TIOCGETA:
777 /* Obtain terminal flags through tcgetattr(). */
778 *(struct termios*)data = *(struct termios*)dev->si_drv2;
779 break;
780 case TIOCSETA:
781 /* Set terminal flags through tcsetattr(). */
782 error = priv_check(td, PRIV_TTY_SETA);
783 if (error)
784 break;
785 *(struct termios*)dev->si_drv2 = *(struct termios*)data;
786 break;
787 case TIOCGETD:
788 *(int *)data = TTYDISC;
789 break;
790 case TIOCGWINSZ:
791 bzero(data, sizeof(struct winsize));
792 break;
793 default:
794 error = ENOTTY;
795 }
796
797done: tty_unlock(tp);
798 return (error);
799}
800
801static struct cdevsw ttyil_cdevsw = {
802 .d_version = D_VERSION,
803 .d_open = ttyil_open,
804 .d_close = ttyil_close,
805 .d_read = ttyil_rdwr,
806 .d_write = ttyil_rdwr,
807 .d_ioctl = ttyil_ioctl,
808 .d_name = "ttyil",
809 .d_flags = D_TTY,
810};
811
812static void
813tty_init_termios(struct tty *tp)
814{
815 struct termios *t = &tp->t_termios_init_in;
816
817 t->c_cflag = TTYDEF_CFLAG;
818 t->c_iflag = TTYDEF_IFLAG;
819 t->c_lflag = TTYDEF_LFLAG;
820 t->c_oflag = TTYDEF_OFLAG;
821 t->c_ispeed = TTYDEF_SPEED;
822 t->c_ospeed = TTYDEF_SPEED;
823 memcpy(&t->c_cc, ttydefchars, sizeof ttydefchars);
824
825 tp->t_termios_init_out = *t;
826}
827
828void
829tty_init_console(struct tty *tp, speed_t s)
830{
831 struct termios *ti = &tp->t_termios_init_in;
832 struct termios *to = &tp->t_termios_init_out;
833
834 if (s != 0) {
835 ti->c_ispeed = ti->c_ospeed = s;
836 to->c_ispeed = to->c_ospeed = s;
837 }
838
839 ti->c_cflag |= CLOCAL;
840 to->c_cflag |= CLOCAL;
841}
842
843/*
844 * Standard device routine implementations, mostly meant for
845 * pseudo-terminal device drivers. When a driver creates a new terminal
846 * device class, missing routines are patched.
847 */
848
849static int
850ttydevsw_defopen(struct tty *tp)
851{
852
853 return (0);
854}
855
856static void
857ttydevsw_defclose(struct tty *tp)
858{
859}
860
861static void
862ttydevsw_defoutwakeup(struct tty *tp)
863{
864
865 panic("Terminal device has output, while not implemented");
866}
867
868static void
869ttydevsw_definwakeup(struct tty *tp)
870{
871}
872
873static int
874ttydevsw_defioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td)
875{
876
877 return (ENOIOCTL);
878}
879
880static int
881ttydevsw_defparam(struct tty *tp, struct termios *t)
882{
883
884 /*
885 * Allow the baud rate to be adjusted for pseudo-devices, but at
886 * least restrict it to 115200 to prevent excessive buffer
887 * usage. Also disallow 0, to prevent foot shooting.
888 */
889 if (t->c_ispeed < B50)
890 t->c_ispeed = B50;
891 else if (t->c_ispeed > B115200)
892 t->c_ispeed = B115200;
893 if (t->c_ospeed < B50)
894 t->c_ospeed = B50;
895 else if (t->c_ospeed > B115200)
896 t->c_ospeed = B115200;
897 t->c_cflag |= CREAD;
898
899 return (0);
900}
901
902static int
903ttydevsw_defmodem(struct tty *tp, int sigon, int sigoff)
904{
905
906 /* Simulate a carrier to make the TTY layer happy. */
907 return (SER_DCD);
908}
909
910static int
911ttydevsw_defmmap(struct tty *tp, vm_ooffset_t offset, vm_paddr_t *paddr,
912 int nprot, vm_memattr_t *memattr)
913{
914
915 return (-1);
916}
917
918static void
919ttydevsw_defpktnotify(struct tty *tp, char event)
920{
921}
922
923static void
924ttydevsw_deffree(void *softc)
925{
926
927 panic("Terminal device freed without a free-handler");
928}
929
930/*
931 * TTY allocation and deallocation. TTY devices can be deallocated when
932 * the driver doesn't use it anymore, when the TTY isn't a session's
933 * controlling TTY and when the device node isn't opened through devfs.
934 */
935
936struct tty *
937tty_alloc(struct ttydevsw *tsw, void *sc)
938{
939
940 return (tty_alloc_mutex(tsw, sc, NULL));
941}
942
943struct tty *
944tty_alloc_mutex(struct ttydevsw *tsw, void *sc, struct mtx *mutex)
945{
946 struct tty *tp;
947
948 /* Make sure the driver defines all routines. */
949#define PATCH_FUNC(x) do { \
950 if (tsw->tsw_ ## x == NULL) \
951 tsw->tsw_ ## x = ttydevsw_def ## x; \
952} while (0)
953 PATCH_FUNC(open);
954 PATCH_FUNC(close);
955 PATCH_FUNC(outwakeup);
956 PATCH_FUNC(inwakeup);
957 PATCH_FUNC(ioctl);
958 PATCH_FUNC(param);
959 PATCH_FUNC(modem);
960 PATCH_FUNC(mmap);
961 PATCH_FUNC(pktnotify);
962 PATCH_FUNC(free);
963#undef PATCH_FUNC
964
965 tp = malloc(sizeof(struct tty), M_TTY, M_WAITOK|M_ZERO);
966 tp->t_devsw = tsw;
967 tp->t_devswsoftc = sc;
968 tp->t_flags = tsw->tsw_flags;
969
970 tty_init_termios(tp);
971
972 cv_init(&tp->t_inwait, "ttyin");
973 cv_init(&tp->t_outwait, "ttyout");
974 cv_init(&tp->t_outserwait, "ttyosr");
975 cv_init(&tp->t_bgwait, "ttybg");
976 cv_init(&tp->t_dcdwait, "ttydcd");
977
978 /* Allow drivers to use a custom mutex to lock the TTY. */
979 if (mutex != NULL) {
980 tp->t_mtx = mutex;
981 } else {
982 tp->t_mtx = &tp->t_mtxobj;
983 mtx_init(&tp->t_mtxobj, "ttymtx", NULL, MTX_DEF);
984 }
985
986 knlist_init_mtx(&tp->t_inpoll.si_note, tp->t_mtx);
987 knlist_init_mtx(&tp->t_outpoll.si_note, tp->t_mtx);
988
989 sx_xlock(&tty_list_sx);
990 TAILQ_INSERT_TAIL(&tty_list, tp, t_list);
991 tty_list_count++;
992 sx_xunlock(&tty_list_sx);
993
994 return (tp);
995}
996
997static void
998tty_dealloc(void *arg)
999{
1000 struct tty *tp = arg;
1001
1002 sx_xlock(&tty_list_sx);
1003 TAILQ_REMOVE(&tty_list, tp, t_list);
1004 tty_list_count--;
1005 sx_xunlock(&tty_list_sx);
1006
1007 /* Make sure we haven't leaked buffers. */
1008 MPASS(ttyinq_getsize(&tp->t_inq) == 0);
1009 MPASS(ttyoutq_getsize(&tp->t_outq) == 0);
1010
1011 knlist_destroy(&tp->t_inpoll.si_note);
1012 knlist_destroy(&tp->t_outpoll.si_note);
1013
1014 cv_destroy(&tp->t_inwait);
1015 cv_destroy(&tp->t_outwait);
1016 cv_destroy(&tp->t_bgwait);
1017 cv_destroy(&tp->t_dcdwait);
1018 cv_destroy(&tp->t_outserwait);
1019
1020 if (tp->t_mtx == &tp->t_mtxobj)
1021 mtx_destroy(&tp->t_mtxobj);
1022 ttydevsw_free(tp);
1023 free(tp, M_TTY);
1024}
1025
1026static void
1027tty_rel_free(struct tty *tp)
1028{
1029 struct cdev *dev;
1030
1031 tty_lock_assert(tp, MA_OWNED);
1032
1033#define TF_ACTIVITY (TF_GONE|TF_OPENED|TF_HOOK|TF_OPENCLOSE)
1034 if (tp->t_sessioncnt != 0 || (tp->t_flags & TF_ACTIVITY) != TF_GONE) {
1035 /* TTY is still in use. */
1036 tty_unlock(tp);
1037 return;
1038 }
1039
1040 /* TTY can be deallocated. */
1041 dev = tp->t_dev;
1042 tp->t_dev = NULL;
1043 tty_unlock(tp);
1044
1045 if (dev != NULL)
1046 destroy_dev_sched_cb(dev, tty_dealloc, tp);
1047}
1048
1049void
1050tty_rel_pgrp(struct tty *tp, struct pgrp *pg)
1051{
1052 MPASS(tp->t_sessioncnt > 0);
1053 tty_lock_assert(tp, MA_OWNED);
1054
1055 if (tp->t_pgrp == pg)
1056 tp->t_pgrp = NULL;
|
1057
| 1057
|
1058 tty_unlock(tp);
1059}
1060
1061void
1062tty_rel_sess(struct tty *tp, struct session *sess)
1063{
1064 MPASS(tp->t_sessioncnt > 0);
1065
1066 /* Current session has left. */
1067 if (tp->t_session == sess) {
1068 tp->t_session = NULL;
1069 MPASS(tp->t_pgrp == NULL);
1070 }
1071 tp->t_sessioncnt--;
1072 tty_rel_free(tp);
1073}
1074
1075void
1076tty_rel_gone(struct tty *tp)
1077{
1078 MPASS(!tty_gone(tp));
1079
1080 /* Simulate carrier removal. */
1081 ttydisc_modem(tp, 0);
1082
1083 /* Wake up all blocked threads. */
1084 tty_wakeup(tp, FREAD|FWRITE);
1085 cv_broadcast(&tp->t_bgwait);
1086 cv_broadcast(&tp->t_dcdwait);
1087
1088 tp->t_flags |= TF_GONE;
1089 tty_rel_free(tp);
1090}
1091
1092/*
1093 * Exposing information about current TTY's through sysctl
1094 */
1095
1096static void
1097tty_to_xtty(struct tty *tp, struct xtty *xt)
1098{
1099 tty_lock_assert(tp, MA_OWNED);
1100
1101 xt->xt_size = sizeof(struct xtty);
1102 xt->xt_insize = ttyinq_getsize(&tp->t_inq);
1103 xt->xt_incc = ttyinq_bytescanonicalized(&tp->t_inq);
1104 xt->xt_inlc = ttyinq_bytesline(&tp->t_inq);
1105 xt->xt_inlow = tp->t_inlow;
1106 xt->xt_outsize = ttyoutq_getsize(&tp->t_outq);
1107 xt->xt_outcc = ttyoutq_bytesused(&tp->t_outq);
1108 xt->xt_outlow = tp->t_outlow;
1109 xt->xt_column = tp->t_column;
1110 xt->xt_pgid = tp->t_pgrp ? tp->t_pgrp->pg_id : 0;
1111 xt->xt_sid = tp->t_session ? tp->t_session->s_sid : 0;
1112 xt->xt_flags = tp->t_flags;
1113 xt->xt_dev = tp->t_dev ? dev2udev(tp->t_dev) : NODEV;
1114}
1115
1116static int
1117sysctl_kern_ttys(SYSCTL_HANDLER_ARGS)
1118{
1119 unsigned long lsize;
1120 struct xtty *xtlist, *xt;
1121 struct tty *tp;
1122 int error;
1123
1124 sx_slock(&tty_list_sx);
1125 lsize = tty_list_count * sizeof(struct xtty);
1126 if (lsize == 0) {
1127 sx_sunlock(&tty_list_sx);
1128 return (0);
1129 }
1130
1131 xtlist = xt = malloc(lsize, M_TTY, M_WAITOK);
1132
1133 TAILQ_FOREACH(tp, &tty_list, t_list) {
1134 tty_lock(tp);
1135 tty_to_xtty(tp, xt);
1136 tty_unlock(tp);
1137 xt++;
1138 }
1139 sx_sunlock(&tty_list_sx);
1140
1141 error = SYSCTL_OUT(req, xtlist, lsize);
1142 free(xtlist, M_TTY);
1143 return (error);
1144}
1145
1146SYSCTL_PROC(_kern, OID_AUTO, ttys, CTLTYPE_OPAQUE|CTLFLAG_RD|CTLFLAG_MPSAFE,
1147 0, 0, sysctl_kern_ttys, "S,xtty", "List of TTYs");
1148
1149/*
1150 * Device node creation. Device has been set up, now we can expose it to
1151 * the user.
1152 */
1153
1154void
1155tty_makedev(struct tty *tp, struct ucred *cred, const char *fmt, ...)
1156{
1157 va_list ap;
1158 struct cdev *dev;
1159 const char *prefix = "tty";
1160 char name[SPECNAMELEN - 3]; /* for "tty" and "cua". */
1161 uid_t uid;
1162 gid_t gid;
1163 mode_t mode;
1164
1165 /* Remove "tty" prefix from devices like PTY's. */
1166 if (tp->t_flags & TF_NOPREFIX)
1167 prefix = "";
1168
1169 va_start(ap, fmt);
1170 vsnrprintf(name, sizeof name, 32, fmt, ap);
1171 va_end(ap);
1172
1173 if (cred == NULL) {
1174 /* System device. */
1175 uid = UID_ROOT;
1176 gid = GID_WHEEL;
1177 mode = S_IRUSR|S_IWUSR;
1178 } else {
1179 /* User device. */
1180 uid = cred->cr_ruid;
1181 gid = GID_TTY;
1182 mode = S_IRUSR|S_IWUSR|S_IWGRP;
1183 }
1184
1185 /* Master call-in device. */
1186 dev = make_dev_cred(&ttydev_cdevsw, 0, cred,
1187 uid, gid, mode, "%s%s", prefix, name);
1188 dev->si_drv1 = tp;
1189 tp->t_dev = dev;
1190
1191 /* Slave call-in devices. */
1192 if (tp->t_flags & TF_INITLOCK) {
1193 dev = make_dev_cred(&ttyil_cdevsw, 0, cred,
1194 uid, gid, mode, "%s%s.init", prefix, name);
1195 dev_depends(tp->t_dev, dev);
1196 dev->si_drv1 = tp;
1197 dev->si_drv2 = &tp->t_termios_init_in;
1198
1199 dev = make_dev_cred(&ttyil_cdevsw, 0, cred,
1200 uid, gid, mode, "%s%s.lock", prefix, name);
1201 dev_depends(tp->t_dev, dev);
1202 dev->si_drv1 = tp;
1203 dev->si_drv2 = &tp->t_termios_lock_in;
1204 }
1205
1206 /* Call-out devices. */
1207 if (tp->t_flags & TF_CALLOUT) {
1208 dev = make_dev_cred(&ttydev_cdevsw, 0, cred,
1209 UID_UUCP, GID_DIALER, 0660, "cua%s", name);
1210 dev_depends(tp->t_dev, dev);
1211 dev->si_drv1 = tp;
1212
1213 /* Slave call-out devices. */
1214 if (tp->t_flags & TF_INITLOCK) {
1215 dev = make_dev_cred(&ttyil_cdevsw, 0, cred,
1216 UID_UUCP, GID_DIALER, 0660, "cua%s.init", name);
1217 dev_depends(tp->t_dev, dev);
1218 dev->si_drv1 = tp;
1219 dev->si_drv2 = &tp->t_termios_init_out;
1220
1221 dev = make_dev_cred(&ttyil_cdevsw, 0, cred,
1222 UID_UUCP, GID_DIALER, 0660, "cua%s.lock", name);
1223 dev_depends(tp->t_dev, dev);
1224 dev->si_drv1 = tp;
1225 dev->si_drv2 = &tp->t_termios_lock_out;
1226 }
1227 }
1228}
1229
1230/*
1231 * Signalling processes.
1232 */
1233
1234void
1235tty_signal_sessleader(struct tty *tp, int sig)
1236{
1237 struct proc *p;
1238
1239 tty_lock_assert(tp, MA_OWNED);
1240 MPASS(sig >= 1 && sig < NSIG);
1241
1242 /* Make signals start output again. */
1243 tp->t_flags &= ~TF_STOPPED;
| 1058 tty_unlock(tp);
1059}
1060
1061void
1062tty_rel_sess(struct tty *tp, struct session *sess)
1063{
1064 MPASS(tp->t_sessioncnt > 0);
1065
1066 /* Current session has left. */
1067 if (tp->t_session == sess) {
1068 tp->t_session = NULL;
1069 MPASS(tp->t_pgrp == NULL);
1070 }
1071 tp->t_sessioncnt--;
1072 tty_rel_free(tp);
1073}
1074
1075void
1076tty_rel_gone(struct tty *tp)
1077{
1078 MPASS(!tty_gone(tp));
1079
1080 /* Simulate carrier removal. */
1081 ttydisc_modem(tp, 0);
1082
1083 /* Wake up all blocked threads. */
1084 tty_wakeup(tp, FREAD|FWRITE);
1085 cv_broadcast(&tp->t_bgwait);
1086 cv_broadcast(&tp->t_dcdwait);
1087
1088 tp->t_flags |= TF_GONE;
1089 tty_rel_free(tp);
1090}
1091
1092/*
1093 * Exposing information about current TTY's through sysctl
1094 */
1095
1096static void
1097tty_to_xtty(struct tty *tp, struct xtty *xt)
1098{
1099 tty_lock_assert(tp, MA_OWNED);
1100
1101 xt->xt_size = sizeof(struct xtty);
1102 xt->xt_insize = ttyinq_getsize(&tp->t_inq);
1103 xt->xt_incc = ttyinq_bytescanonicalized(&tp->t_inq);
1104 xt->xt_inlc = ttyinq_bytesline(&tp->t_inq);
1105 xt->xt_inlow = tp->t_inlow;
1106 xt->xt_outsize = ttyoutq_getsize(&tp->t_outq);
1107 xt->xt_outcc = ttyoutq_bytesused(&tp->t_outq);
1108 xt->xt_outlow = tp->t_outlow;
1109 xt->xt_column = tp->t_column;
1110 xt->xt_pgid = tp->t_pgrp ? tp->t_pgrp->pg_id : 0;
1111 xt->xt_sid = tp->t_session ? tp->t_session->s_sid : 0;
1112 xt->xt_flags = tp->t_flags;
1113 xt->xt_dev = tp->t_dev ? dev2udev(tp->t_dev) : NODEV;
1114}
1115
1116static int
1117sysctl_kern_ttys(SYSCTL_HANDLER_ARGS)
1118{
1119 unsigned long lsize;
1120 struct xtty *xtlist, *xt;
1121 struct tty *tp;
1122 int error;
1123
1124 sx_slock(&tty_list_sx);
1125 lsize = tty_list_count * sizeof(struct xtty);
1126 if (lsize == 0) {
1127 sx_sunlock(&tty_list_sx);
1128 return (0);
1129 }
1130
1131 xtlist = xt = malloc(lsize, M_TTY, M_WAITOK);
1132
1133 TAILQ_FOREACH(tp, &tty_list, t_list) {
1134 tty_lock(tp);
1135 tty_to_xtty(tp, xt);
1136 tty_unlock(tp);
1137 xt++;
1138 }
1139 sx_sunlock(&tty_list_sx);
1140
1141 error = SYSCTL_OUT(req, xtlist, lsize);
1142 free(xtlist, M_TTY);
1143 return (error);
1144}
1145
1146SYSCTL_PROC(_kern, OID_AUTO, ttys, CTLTYPE_OPAQUE|CTLFLAG_RD|CTLFLAG_MPSAFE,
1147 0, 0, sysctl_kern_ttys, "S,xtty", "List of TTYs");
1148
1149/*
1150 * Device node creation. Device has been set up, now we can expose it to
1151 * the user.
1152 */
1153
1154void
1155tty_makedev(struct tty *tp, struct ucred *cred, const char *fmt, ...)
1156{
1157 va_list ap;
1158 struct cdev *dev;
1159 const char *prefix = "tty";
1160 char name[SPECNAMELEN - 3]; /* for "tty" and "cua". */
1161 uid_t uid;
1162 gid_t gid;
1163 mode_t mode;
1164
1165 /* Remove "tty" prefix from devices like PTY's. */
1166 if (tp->t_flags & TF_NOPREFIX)
1167 prefix = "";
1168
1169 va_start(ap, fmt);
1170 vsnrprintf(name, sizeof name, 32, fmt, ap);
1171 va_end(ap);
1172
1173 if (cred == NULL) {
1174 /* System device. */
1175 uid = UID_ROOT;
1176 gid = GID_WHEEL;
1177 mode = S_IRUSR|S_IWUSR;
1178 } else {
1179 /* User device. */
1180 uid = cred->cr_ruid;
1181 gid = GID_TTY;
1182 mode = S_IRUSR|S_IWUSR|S_IWGRP;
1183 }
1184
1185 /* Master call-in device. */
1186 dev = make_dev_cred(&ttydev_cdevsw, 0, cred,
1187 uid, gid, mode, "%s%s", prefix, name);
1188 dev->si_drv1 = tp;
1189 tp->t_dev = dev;
1190
1191 /* Slave call-in devices. */
1192 if (tp->t_flags & TF_INITLOCK) {
1193 dev = make_dev_cred(&ttyil_cdevsw, 0, cred,
1194 uid, gid, mode, "%s%s.init", prefix, name);
1195 dev_depends(tp->t_dev, dev);
1196 dev->si_drv1 = tp;
1197 dev->si_drv2 = &tp->t_termios_init_in;
1198
1199 dev = make_dev_cred(&ttyil_cdevsw, 0, cred,
1200 uid, gid, mode, "%s%s.lock", prefix, name);
1201 dev_depends(tp->t_dev, dev);
1202 dev->si_drv1 = tp;
1203 dev->si_drv2 = &tp->t_termios_lock_in;
1204 }
1205
1206 /* Call-out devices. */
1207 if (tp->t_flags & TF_CALLOUT) {
1208 dev = make_dev_cred(&ttydev_cdevsw, 0, cred,
1209 UID_UUCP, GID_DIALER, 0660, "cua%s", name);
1210 dev_depends(tp->t_dev, dev);
1211 dev->si_drv1 = tp;
1212
1213 /* Slave call-out devices. */
1214 if (tp->t_flags & TF_INITLOCK) {
1215 dev = make_dev_cred(&ttyil_cdevsw, 0, cred,
1216 UID_UUCP, GID_DIALER, 0660, "cua%s.init", name);
1217 dev_depends(tp->t_dev, dev);
1218 dev->si_drv1 = tp;
1219 dev->si_drv2 = &tp->t_termios_init_out;
1220
1221 dev = make_dev_cred(&ttyil_cdevsw, 0, cred,
1222 UID_UUCP, GID_DIALER, 0660, "cua%s.lock", name);
1223 dev_depends(tp->t_dev, dev);
1224 dev->si_drv1 = tp;
1225 dev->si_drv2 = &tp->t_termios_lock_out;
1226 }
1227 }
1228}
1229
1230/*
1231 * Signalling processes.
1232 */
1233
1234void
1235tty_signal_sessleader(struct tty *tp, int sig)
1236{
1237 struct proc *p;
1238
1239 tty_lock_assert(tp, MA_OWNED);
1240 MPASS(sig >= 1 && sig < NSIG);
1241
1242 /* Make signals start output again. */
1243 tp->t_flags &= ~TF_STOPPED;
|
1244
| 1244
|
1245 if (tp->t_session != NULL && tp->t_session->s_leader != NULL) {
1246 p = tp->t_session->s_leader;
1247 PROC_LOCK(p);
1248 psignal(p, sig);
1249 PROC_UNLOCK(p);
1250 }
1251}
1252
1253void
1254tty_signal_pgrp(struct tty *tp, int sig)
1255{
1256 ksiginfo_t ksi;
1257
1258 tty_lock_assert(tp, MA_OWNED);
1259 MPASS(sig >= 1 && sig < NSIG);
1260
1261 /* Make signals start output again. */
1262 tp->t_flags &= ~TF_STOPPED;
1263
1264 if (sig == SIGINFO && !(tp->t_termios.c_lflag & NOKERNINFO))
1265 tty_info(tp);
1266 if (tp->t_pgrp != NULL) {
1267 ksiginfo_init(&ksi);
1268 ksi.ksi_signo = sig;
1269 ksi.ksi_code = SI_KERNEL;
1270 PGRP_LOCK(tp->t_pgrp);
1271 pgsignal(tp->t_pgrp, sig, 1, &ksi);
1272 PGRP_UNLOCK(tp->t_pgrp);
1273 }
1274}
1275
1276void
1277tty_wakeup(struct tty *tp, int flags)
1278{
1279 if (tp->t_flags & TF_ASYNC && tp->t_sigio != NULL)
1280 pgsigio(&tp->t_sigio, SIGIO, (tp->t_session != NULL));
1281
1282 if (flags & FWRITE) {
1283 cv_broadcast(&tp->t_outwait);
1284 selwakeup(&tp->t_outpoll);
1285 KNOTE_LOCKED(&tp->t_outpoll.si_note, 0);
1286 }
1287 if (flags & FREAD) {
1288 cv_broadcast(&tp->t_inwait);
1289 selwakeup(&tp->t_inpoll);
1290 KNOTE_LOCKED(&tp->t_inpoll.si_note, 0);
1291 }
1292}
1293
1294int
1295tty_wait(struct tty *tp, struct cv *cv)
1296{
1297 int error;
1298 int revokecnt = tp->t_revokecnt;
1299
1300 tty_lock_assert(tp, MA_OWNED|MA_NOTRECURSED);
1301 MPASS(!tty_gone(tp));
1302
1303 error = cv_wait_sig(cv, tp->t_mtx);
1304
1305 /* Restart the system call when we may have been revoked. */
1306 if (tp->t_revokecnt != revokecnt)
1307 return (ERESTART);
| 1245 if (tp->t_session != NULL && tp->t_session->s_leader != NULL) {
1246 p = tp->t_session->s_leader;
1247 PROC_LOCK(p);
1248 psignal(p, sig);
1249 PROC_UNLOCK(p);
1250 }
1251}
1252
1253void
1254tty_signal_pgrp(struct tty *tp, int sig)
1255{
1256 ksiginfo_t ksi;
1257
1258 tty_lock_assert(tp, MA_OWNED);
1259 MPASS(sig >= 1 && sig < NSIG);
1260
1261 /* Make signals start output again. */
1262 tp->t_flags &= ~TF_STOPPED;
1263
1264 if (sig == SIGINFO && !(tp->t_termios.c_lflag & NOKERNINFO))
1265 tty_info(tp);
1266 if (tp->t_pgrp != NULL) {
1267 ksiginfo_init(&ksi);
1268 ksi.ksi_signo = sig;
1269 ksi.ksi_code = SI_KERNEL;
1270 PGRP_LOCK(tp->t_pgrp);
1271 pgsignal(tp->t_pgrp, sig, 1, &ksi);
1272 PGRP_UNLOCK(tp->t_pgrp);
1273 }
1274}
1275
1276void
1277tty_wakeup(struct tty *tp, int flags)
1278{
1279 if (tp->t_flags & TF_ASYNC && tp->t_sigio != NULL)
1280 pgsigio(&tp->t_sigio, SIGIO, (tp->t_session != NULL));
1281
1282 if (flags & FWRITE) {
1283 cv_broadcast(&tp->t_outwait);
1284 selwakeup(&tp->t_outpoll);
1285 KNOTE_LOCKED(&tp->t_outpoll.si_note, 0);
1286 }
1287 if (flags & FREAD) {
1288 cv_broadcast(&tp->t_inwait);
1289 selwakeup(&tp->t_inpoll);
1290 KNOTE_LOCKED(&tp->t_inpoll.si_note, 0);
1291 }
1292}
1293
1294int
1295tty_wait(struct tty *tp, struct cv *cv)
1296{
1297 int error;
1298 int revokecnt = tp->t_revokecnt;
1299
1300 tty_lock_assert(tp, MA_OWNED|MA_NOTRECURSED);
1301 MPASS(!tty_gone(tp));
1302
1303 error = cv_wait_sig(cv, tp->t_mtx);
1304
1305 /* Restart the system call when we may have been revoked. */
1306 if (tp->t_revokecnt != revokecnt)
1307 return (ERESTART);
|
1308
| 1308
|
1309 /* Bail out when the device slipped away. */
1310 if (tty_gone(tp))
1311 return (ENXIO);
1312
1313 return (error);
1314}
1315
1316int
1317tty_timedwait(struct tty *tp, struct cv *cv, int hz)
1318{
1319 int error;
1320 int revokecnt = tp->t_revokecnt;
1321
1322 tty_lock_assert(tp, MA_OWNED|MA_NOTRECURSED);
1323 MPASS(!tty_gone(tp));
1324
1325 error = cv_timedwait_sig(cv, tp->t_mtx, hz);
1326
1327 /* Restart the system call when we may have been revoked. */
1328 if (tp->t_revokecnt != revokecnt)
1329 return (ERESTART);
| 1309 /* Bail out when the device slipped away. */
1310 if (tty_gone(tp))
1311 return (ENXIO);
1312
1313 return (error);
1314}
1315
1316int
1317tty_timedwait(struct tty *tp, struct cv *cv, int hz)
1318{
1319 int error;
1320 int revokecnt = tp->t_revokecnt;
1321
1322 tty_lock_assert(tp, MA_OWNED|MA_NOTRECURSED);
1323 MPASS(!tty_gone(tp));
1324
1325 error = cv_timedwait_sig(cv, tp->t_mtx, hz);
1326
1327 /* Restart the system call when we may have been revoked. */
1328 if (tp->t_revokecnt != revokecnt)
1329 return (ERESTART);
|
1330
| 1330
|
1331 /* Bail out when the device slipped away. */
1332 if (tty_gone(tp))
1333 return (ENXIO);
1334
1335 return (error);
1336}
1337
1338void
1339tty_flush(struct tty *tp, int flags)
1340{
1341 if (flags & FWRITE) {
1342 tp->t_flags &= ~TF_HIWAT_OUT;
1343 ttyoutq_flush(&tp->t_outq);
1344 tty_wakeup(tp, FWRITE);
1345 ttydevsw_pktnotify(tp, TIOCPKT_FLUSHWRITE);
1346 }
1347 if (flags & FREAD) {
1348 tty_hiwat_in_unblock(tp);
1349 ttyinq_flush(&tp->t_inq);
1350 ttydevsw_inwakeup(tp);
1351 ttydevsw_pktnotify(tp, TIOCPKT_FLUSHREAD);
1352 }
1353}
1354
1355static int
1356tty_generic_ioctl(struct tty *tp, u_long cmd, void *data, int fflag,
1357 struct thread *td)
1358{
1359 int error;
1360
1361 switch (cmd) {
1362 /*
1363 * Modem commands.
1364 * The SER_* and TIOCM_* flags are the same, but one bit
1365 * shifted. I don't know why.
1366 */
1367 case TIOCSDTR:
1368 ttydevsw_modem(tp, SER_DTR, 0);
1369 return (0);
1370 case TIOCCDTR:
1371 ttydevsw_modem(tp, 0, SER_DTR);
1372 return (0);
1373 case TIOCMSET: {
1374 int bits = *(int *)data;
1375 ttydevsw_modem(tp,
1376 (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1,
1377 ((~bits) & (TIOCM_DTR | TIOCM_RTS)) >> 1);
1378 return (0);
1379 }
1380 case TIOCMBIS: {
1381 int bits = *(int *)data;
1382 ttydevsw_modem(tp, (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1, 0);
1383 return (0);
1384 }
1385 case TIOCMBIC: {
1386 int bits = *(int *)data;
1387 ttydevsw_modem(tp, 0, (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1);
1388 return (0);
1389 }
1390 case TIOCMGET:
1391 *(int *)data = TIOCM_LE + (ttydevsw_modem(tp, 0, 0) << 1);
1392 return (0);
1393
1394 case FIOASYNC:
1395 if (*(int *)data)
1396 tp->t_flags |= TF_ASYNC;
1397 else
1398 tp->t_flags &= ~TF_ASYNC;
1399 return (0);
1400 case FIONBIO:
1401 /* This device supports non-blocking operation. */
1402 return (0);
1403 case FIONREAD:
1404 *(int *)data = ttyinq_bytescanonicalized(&tp->t_inq);
1405 return (0);
1406 case FIONWRITE:
1407 case TIOCOUTQ:
1408 *(int *)data = ttyoutq_bytesused(&tp->t_outq);
1409 return (0);
1410 case FIOSETOWN:
1411 if (tp->t_session != NULL && !tty_is_ctty(tp, td->td_proc))
1412 /* Not allowed to set ownership. */
1413 return (ENOTTY);
1414
1415 /* Temporarily unlock the TTY to set ownership. */
1416 tty_unlock(tp);
1417 error = fsetown(*(int *)data, &tp->t_sigio);
1418 tty_lock(tp);
1419 return (error);
1420 case FIOGETOWN:
1421 if (tp->t_session != NULL && !tty_is_ctty(tp, td->td_proc))
1422 /* Not allowed to set ownership. */
1423 return (ENOTTY);
1424
1425 /* Get ownership. */
1426 *(int *)data = fgetown(&tp->t_sigio);
1427 return (0);
1428 case TIOCGETA:
1429 /* Obtain terminal flags through tcgetattr(). */
1430 *(struct termios*)data = tp->t_termios;
1431 return (0);
1432 case TIOCSETA:
1433 case TIOCSETAW:
1434 case TIOCSETAF: {
1435 struct termios *t = data;
1436
1437 /*
1438 * Who makes up these funny rules? According to POSIX,
1439 * input baud rate is set equal to the output baud rate
1440 * when zero.
1441 */
1442 if (t->c_ispeed == 0)
1443 t->c_ispeed = t->c_ospeed;
1444
1445 /* Discard any unsupported bits. */
1446 t->c_iflag &= TTYSUP_IFLAG;
1447 t->c_oflag &= TTYSUP_OFLAG;
1448 t->c_lflag &= TTYSUP_LFLAG;
1449 t->c_cflag &= TTYSUP_CFLAG;
1450
1451 /* Set terminal flags through tcsetattr(). */
1452 if (cmd == TIOCSETAW || cmd == TIOCSETAF) {
1453 error = tty_drain(tp);
1454 if (error)
1455 return (error);
1456 if (cmd == TIOCSETAF)
1457 tty_flush(tp, FREAD);
1458 }
1459
1460 /*
1461 * Only call param() when the flags really change.
1462 */
1463 if ((t->c_cflag & CIGNORE) == 0 &&
1464 (tp->t_termios.c_cflag != t->c_cflag ||
1465 tp->t_termios.c_ispeed != t->c_ispeed ||
1466 tp->t_termios.c_ospeed != t->c_ospeed)) {
1467 error = ttydevsw_param(tp, t);
1468 if (error)
1469 return (error);
1470
1471 /* XXX: CLOCAL? */
| 1331 /* Bail out when the device slipped away. */
1332 if (tty_gone(tp))
1333 return (ENXIO);
1334
1335 return (error);
1336}
1337
1338void
1339tty_flush(struct tty *tp, int flags)
1340{
1341 if (flags & FWRITE) {
1342 tp->t_flags &= ~TF_HIWAT_OUT;
1343 ttyoutq_flush(&tp->t_outq);
1344 tty_wakeup(tp, FWRITE);
1345 ttydevsw_pktnotify(tp, TIOCPKT_FLUSHWRITE);
1346 }
1347 if (flags & FREAD) {
1348 tty_hiwat_in_unblock(tp);
1349 ttyinq_flush(&tp->t_inq);
1350 ttydevsw_inwakeup(tp);
1351 ttydevsw_pktnotify(tp, TIOCPKT_FLUSHREAD);
1352 }
1353}
1354
1355static int
1356tty_generic_ioctl(struct tty *tp, u_long cmd, void *data, int fflag,
1357 struct thread *td)
1358{
1359 int error;
1360
1361 switch (cmd) {
1362 /*
1363 * Modem commands.
1364 * The SER_* and TIOCM_* flags are the same, but one bit
1365 * shifted. I don't know why.
1366 */
1367 case TIOCSDTR:
1368 ttydevsw_modem(tp, SER_DTR, 0);
1369 return (0);
1370 case TIOCCDTR:
1371 ttydevsw_modem(tp, 0, SER_DTR);
1372 return (0);
1373 case TIOCMSET: {
1374 int bits = *(int *)data;
1375 ttydevsw_modem(tp,
1376 (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1,
1377 ((~bits) & (TIOCM_DTR | TIOCM_RTS)) >> 1);
1378 return (0);
1379 }
1380 case TIOCMBIS: {
1381 int bits = *(int *)data;
1382 ttydevsw_modem(tp, (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1, 0);
1383 return (0);
1384 }
1385 case TIOCMBIC: {
1386 int bits = *(int *)data;
1387 ttydevsw_modem(tp, 0, (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1);
1388 return (0);
1389 }
1390 case TIOCMGET:
1391 *(int *)data = TIOCM_LE + (ttydevsw_modem(tp, 0, 0) << 1);
1392 return (0);
1393
1394 case FIOASYNC:
1395 if (*(int *)data)
1396 tp->t_flags |= TF_ASYNC;
1397 else
1398 tp->t_flags &= ~TF_ASYNC;
1399 return (0);
1400 case FIONBIO:
1401 /* This device supports non-blocking operation. */
1402 return (0);
1403 case FIONREAD:
1404 *(int *)data = ttyinq_bytescanonicalized(&tp->t_inq);
1405 return (0);
1406 case FIONWRITE:
1407 case TIOCOUTQ:
1408 *(int *)data = ttyoutq_bytesused(&tp->t_outq);
1409 return (0);
1410 case FIOSETOWN:
1411 if (tp->t_session != NULL && !tty_is_ctty(tp, td->td_proc))
1412 /* Not allowed to set ownership. */
1413 return (ENOTTY);
1414
1415 /* Temporarily unlock the TTY to set ownership. */
1416 tty_unlock(tp);
1417 error = fsetown(*(int *)data, &tp->t_sigio);
1418 tty_lock(tp);
1419 return (error);
1420 case FIOGETOWN:
1421 if (tp->t_session != NULL && !tty_is_ctty(tp, td->td_proc))
1422 /* Not allowed to set ownership. */
1423 return (ENOTTY);
1424
1425 /* Get ownership. */
1426 *(int *)data = fgetown(&tp->t_sigio);
1427 return (0);
1428 case TIOCGETA:
1429 /* Obtain terminal flags through tcgetattr(). */
1430 *(struct termios*)data = tp->t_termios;
1431 return (0);
1432 case TIOCSETA:
1433 case TIOCSETAW:
1434 case TIOCSETAF: {
1435 struct termios *t = data;
1436
1437 /*
1438 * Who makes up these funny rules? According to POSIX,
1439 * input baud rate is set equal to the output baud rate
1440 * when zero.
1441 */
1442 if (t->c_ispeed == 0)
1443 t->c_ispeed = t->c_ospeed;
1444
1445 /* Discard any unsupported bits. */
1446 t->c_iflag &= TTYSUP_IFLAG;
1447 t->c_oflag &= TTYSUP_OFLAG;
1448 t->c_lflag &= TTYSUP_LFLAG;
1449 t->c_cflag &= TTYSUP_CFLAG;
1450
1451 /* Set terminal flags through tcsetattr(). */
1452 if (cmd == TIOCSETAW || cmd == TIOCSETAF) {
1453 error = tty_drain(tp);
1454 if (error)
1455 return (error);
1456 if (cmd == TIOCSETAF)
1457 tty_flush(tp, FREAD);
1458 }
1459
1460 /*
1461 * Only call param() when the flags really change.
1462 */
1463 if ((t->c_cflag & CIGNORE) == 0 &&
1464 (tp->t_termios.c_cflag != t->c_cflag ||
1465 tp->t_termios.c_ispeed != t->c_ispeed ||
1466 tp->t_termios.c_ospeed != t->c_ospeed)) {
1467 error = ttydevsw_param(tp, t);
1468 if (error)
1469 return (error);
1470
1471 /* XXX: CLOCAL? */
|
1472
| 1472
|
1473 tp->t_termios.c_cflag = t->c_cflag & ~CIGNORE;
1474 tp->t_termios.c_ispeed = t->c_ispeed;
1475 tp->t_termios.c_ospeed = t->c_ospeed;
1476
1477 /* Baud rate has changed - update watermarks. */
1478 tty_watermarks(tp);
1479 }
1480
1481 /* Copy new non-device driver parameters. */
1482 tp->t_termios.c_iflag = t->c_iflag;
1483 tp->t_termios.c_oflag = t->c_oflag;
1484 tp->t_termios.c_lflag = t->c_lflag;
1485 memcpy(&tp->t_termios.c_cc, t->c_cc, sizeof t->c_cc);
1486
1487 ttydisc_optimize(tp);
1488
1489 if ((t->c_lflag & ICANON) == 0) {
1490 /*
1491 * When in non-canonical mode, wake up all
1492 * readers. Canonicalize any partial input. VMIN
1493 * and VTIME could also be adjusted.
1494 */
1495 ttyinq_canonicalize(&tp->t_inq);
1496 tty_wakeup(tp, FREAD);
1497 }
1498
1499 /*
1500 * For packet mode: notify the PTY consumer that VSTOP
1501 * and VSTART may have been changed.
1502 */
1503 if (tp->t_termios.c_iflag & IXON &&
1504 tp->t_termios.c_cc[VSTOP] == CTRL('S') &&
1505 tp->t_termios.c_cc[VSTART] == CTRL('Q'))
1506 ttydevsw_pktnotify(tp, TIOCPKT_DOSTOP);
1507 else
1508 ttydevsw_pktnotify(tp, TIOCPKT_NOSTOP);
1509 return (0);
1510 }
1511 case TIOCGETD:
1512 /* For compatibility - we only support TTYDISC. */
1513 *(int *)data = TTYDISC;
1514 return (0);
1515 case TIOCGPGRP:
1516 if (!tty_is_ctty(tp, td->td_proc))
1517 return (ENOTTY);
1518
1519 if (tp->t_pgrp != NULL)
1520 *(int *)data = tp->t_pgrp->pg_id;
1521 else
1522 *(int *)data = NO_PID;
1523 return (0);
1524 case TIOCGSID:
1525 if (!tty_is_ctty(tp, td->td_proc))
1526 return (ENOTTY);
1527
1528 MPASS(tp->t_session);
1529 *(int *)data = tp->t_session->s_sid;
1530 return (0);
1531 case TIOCSCTTY: {
1532 struct proc *p = td->td_proc;
1533
1534 /* XXX: This looks awful. */
1535 tty_unlock(tp);
1536 sx_xlock(&proctree_lock);
1537 tty_lock(tp);
1538
1539 if (!SESS_LEADER(p)) {
1540 /* Only the session leader may do this. */
1541 sx_xunlock(&proctree_lock);
1542 return (EPERM);
1543 }
1544
1545 if (tp->t_session != NULL && tp->t_session == p->p_session) {
1546 /* This is already our controlling TTY. */
1547 sx_xunlock(&proctree_lock);
1548 return (0);
1549 }
1550
1551 if (p->p_session->s_ttyp != NULL ||
1552 (tp->t_session != NULL && tp->t_session->s_ttyvp != NULL &&
1553 tp->t_session->s_ttyvp->v_type != VBAD)) {
1554 /*
1555 * There is already a relation between a TTY and
1556 * a session, or the caller is not the session
1557 * leader.
1558 *
1559 * Allow the TTY to be stolen when the vnode is
1560 * invalid, but the reference to the TTY is
1561 * still active. This allows immediate reuse of
1562 * TTYs of which the session leader has been
1563 * killed or the TTY revoked.
1564 */
1565 sx_xunlock(&proctree_lock);
1566 return (EPERM);
1567 }
1568
1569 /* Connect the session to the TTY. */
1570 tp->t_session = p->p_session;
1571 tp->t_session->s_ttyp = tp;
1572 tp->t_sessioncnt++;
1573 sx_xunlock(&proctree_lock);
1574
1575 /* Assign foreground process group. */
1576 tp->t_pgrp = p->p_pgrp;
1577 PROC_LOCK(p);
1578 p->p_flag |= P_CONTROLT;
1579 PROC_UNLOCK(p);
1580
1581 return (0);
1582 }
1583 case TIOCSPGRP: {
1584 struct pgrp *pg;
1585
1586 /*
1587 * XXX: Temporarily unlock the TTY to locate the process
1588 * group. This code would be lot nicer if we would ever
1589 * decompose proctree_lock.
1590 */
1591 tty_unlock(tp);
1592 sx_slock(&proctree_lock);
1593 pg = pgfind(*(int *)data);
1594 if (pg != NULL)
1595 PGRP_UNLOCK(pg);
1596 if (pg == NULL || pg->pg_session != td->td_proc->p_session) {
1597 sx_sunlock(&proctree_lock);
1598 tty_lock(tp);
1599 return (EPERM);
1600 }
1601 tty_lock(tp);
1602
1603 /*
1604 * Determine if this TTY is the controlling TTY after
1605 * relocking the TTY.
1606 */
1607 if (!tty_is_ctty(tp, td->td_proc)) {
1608 sx_sunlock(&proctree_lock);
1609 return (ENOTTY);
1610 }
1611 tp->t_pgrp = pg;
1612 sx_sunlock(&proctree_lock);
1613
1614 /* Wake up the background process groups. */
1615 cv_broadcast(&tp->t_bgwait);
1616 return (0);
1617 }
1618 case TIOCFLUSH: {
1619 int flags = *(int *)data;
1620
1621 if (flags == 0)
1622 flags = (FREAD|FWRITE);
1623 else
1624 flags &= (FREAD|FWRITE);
1625 tty_flush(tp, flags);
1626 return (0);
1627 }
1628 case TIOCDRAIN:
1629 /* Drain TTY output. */
1630 return tty_drain(tp);
1631 case TIOCCONS:
1632 /* Set terminal as console TTY. */
1633 if (*(int *)data) {
1634 error = priv_check(td, PRIV_TTY_CONSOLE);
1635 if (error)
1636 return (error);
1637
1638 /*
1639 * XXX: constty should really need to be locked!
1640 * XXX: allow disconnected constty's to be stolen!
1641 */
1642
1643 if (constty == tp)
1644 return (0);
1645 if (constty != NULL)
1646 return (EBUSY);
1647
1648 tty_unlock(tp);
1649 constty_set(tp);
1650 tty_lock(tp);
1651 } else if (constty == tp) {
1652 constty_clear();
1653 }
1654 return (0);
1655 case TIOCGWINSZ:
1656 /* Obtain window size. */
1657 *(struct winsize*)data = tp->t_winsize;
1658 return (0);
1659 case TIOCSWINSZ:
1660 /* Set window size. */
1661 if (bcmp(&tp->t_winsize, data, sizeof(struct winsize)) == 0)
1662 return (0);
1663 tp->t_winsize = *(struct winsize*)data;
1664 tty_signal_pgrp(tp, SIGWINCH);
1665 return (0);
1666 case TIOCEXCL:
1667 tp->t_flags |= TF_EXCLUDE;
1668 return (0);
1669 case TIOCNXCL:
1670 tp->t_flags &= ~TF_EXCLUDE;
1671 return (0);
1672 case TIOCSTOP:
1673 tp->t_flags |= TF_STOPPED;
1674 ttydevsw_pktnotify(tp, TIOCPKT_STOP);
1675 return (0);
1676 case TIOCSTART:
1677 tp->t_flags &= ~TF_STOPPED;
1678 ttydevsw_outwakeup(tp);
1679 ttydevsw_pktnotify(tp, TIOCPKT_START);
1680 return (0);
1681 case TIOCSTAT:
1682 tty_info(tp);
1683 return (0);
1684 case TIOCSTI:
1685 if ((fflag & FREAD) == 0 && priv_check(td, PRIV_TTY_STI))
1686 return (EPERM);
1687 if (!tty_is_ctty(tp, td->td_proc) &&
1688 priv_check(td, PRIV_TTY_STI))
1689 return (EACCES);
1690 ttydisc_rint(tp, *(char *)data, 0);
1691 ttydisc_rint_done(tp);
1692 return (0);
1693 }
1694
1695#ifdef COMPAT_43TTY
1696 return tty_ioctl_compat(tp, cmd, data, fflag, td);
1697#else /* !COMPAT_43TTY */
1698 return (ENOIOCTL);
1699#endif /* COMPAT_43TTY */
1700}
1701
1702int
1703tty_ioctl(struct tty *tp, u_long cmd, void *data, int fflag, struct thread *td)
1704{
1705 int error;
1706
1707 tty_lock_assert(tp, MA_OWNED);
1708
1709 if (tty_gone(tp))
1710 return (ENXIO);
| 1473 tp->t_termios.c_cflag = t->c_cflag & ~CIGNORE;
1474 tp->t_termios.c_ispeed = t->c_ispeed;
1475 tp->t_termios.c_ospeed = t->c_ospeed;
1476
1477 /* Baud rate has changed - update watermarks. */
1478 tty_watermarks(tp);
1479 }
1480
1481 /* Copy new non-device driver parameters. */
1482 tp->t_termios.c_iflag = t->c_iflag;
1483 tp->t_termios.c_oflag = t->c_oflag;
1484 tp->t_termios.c_lflag = t->c_lflag;
1485 memcpy(&tp->t_termios.c_cc, t->c_cc, sizeof t->c_cc);
1486
1487 ttydisc_optimize(tp);
1488
1489 if ((t->c_lflag & ICANON) == 0) {
1490 /*
1491 * When in non-canonical mode, wake up all
1492 * readers. Canonicalize any partial input. VMIN
1493 * and VTIME could also be adjusted.
1494 */
1495 ttyinq_canonicalize(&tp->t_inq);
1496 tty_wakeup(tp, FREAD);
1497 }
1498
1499 /*
1500 * For packet mode: notify the PTY consumer that VSTOP
1501 * and VSTART may have been changed.
1502 */
1503 if (tp->t_termios.c_iflag & IXON &&
1504 tp->t_termios.c_cc[VSTOP] == CTRL('S') &&
1505 tp->t_termios.c_cc[VSTART] == CTRL('Q'))
1506 ttydevsw_pktnotify(tp, TIOCPKT_DOSTOP);
1507 else
1508 ttydevsw_pktnotify(tp, TIOCPKT_NOSTOP);
1509 return (0);
1510 }
1511 case TIOCGETD:
1512 /* For compatibility - we only support TTYDISC. */
1513 *(int *)data = TTYDISC;
1514 return (0);
1515 case TIOCGPGRP:
1516 if (!tty_is_ctty(tp, td->td_proc))
1517 return (ENOTTY);
1518
1519 if (tp->t_pgrp != NULL)
1520 *(int *)data = tp->t_pgrp->pg_id;
1521 else
1522 *(int *)data = NO_PID;
1523 return (0);
1524 case TIOCGSID:
1525 if (!tty_is_ctty(tp, td->td_proc))
1526 return (ENOTTY);
1527
1528 MPASS(tp->t_session);
1529 *(int *)data = tp->t_session->s_sid;
1530 return (0);
1531 case TIOCSCTTY: {
1532 struct proc *p = td->td_proc;
1533
1534 /* XXX: This looks awful. */
1535 tty_unlock(tp);
1536 sx_xlock(&proctree_lock);
1537 tty_lock(tp);
1538
1539 if (!SESS_LEADER(p)) {
1540 /* Only the session leader may do this. */
1541 sx_xunlock(&proctree_lock);
1542 return (EPERM);
1543 }
1544
1545 if (tp->t_session != NULL && tp->t_session == p->p_session) {
1546 /* This is already our controlling TTY. */
1547 sx_xunlock(&proctree_lock);
1548 return (0);
1549 }
1550
1551 if (p->p_session->s_ttyp != NULL ||
1552 (tp->t_session != NULL && tp->t_session->s_ttyvp != NULL &&
1553 tp->t_session->s_ttyvp->v_type != VBAD)) {
1554 /*
1555 * There is already a relation between a TTY and
1556 * a session, or the caller is not the session
1557 * leader.
1558 *
1559 * Allow the TTY to be stolen when the vnode is
1560 * invalid, but the reference to the TTY is
1561 * still active. This allows immediate reuse of
1562 * TTYs of which the session leader has been
1563 * killed or the TTY revoked.
1564 */
1565 sx_xunlock(&proctree_lock);
1566 return (EPERM);
1567 }
1568
1569 /* Connect the session to the TTY. */
1570 tp->t_session = p->p_session;
1571 tp->t_session->s_ttyp = tp;
1572 tp->t_sessioncnt++;
1573 sx_xunlock(&proctree_lock);
1574
1575 /* Assign foreground process group. */
1576 tp->t_pgrp = p->p_pgrp;
1577 PROC_LOCK(p);
1578 p->p_flag |= P_CONTROLT;
1579 PROC_UNLOCK(p);
1580
1581 return (0);
1582 }
1583 case TIOCSPGRP: {
1584 struct pgrp *pg;
1585
1586 /*
1587 * XXX: Temporarily unlock the TTY to locate the process
1588 * group. This code would be lot nicer if we would ever
1589 * decompose proctree_lock.
1590 */
1591 tty_unlock(tp);
1592 sx_slock(&proctree_lock);
1593 pg = pgfind(*(int *)data);
1594 if (pg != NULL)
1595 PGRP_UNLOCK(pg);
1596 if (pg == NULL || pg->pg_session != td->td_proc->p_session) {
1597 sx_sunlock(&proctree_lock);
1598 tty_lock(tp);
1599 return (EPERM);
1600 }
1601 tty_lock(tp);
1602
1603 /*
1604 * Determine if this TTY is the controlling TTY after
1605 * relocking the TTY.
1606 */
1607 if (!tty_is_ctty(tp, td->td_proc)) {
1608 sx_sunlock(&proctree_lock);
1609 return (ENOTTY);
1610 }
1611 tp->t_pgrp = pg;
1612 sx_sunlock(&proctree_lock);
1613
1614 /* Wake up the background process groups. */
1615 cv_broadcast(&tp->t_bgwait);
1616 return (0);
1617 }
1618 case TIOCFLUSH: {
1619 int flags = *(int *)data;
1620
1621 if (flags == 0)
1622 flags = (FREAD|FWRITE);
1623 else
1624 flags &= (FREAD|FWRITE);
1625 tty_flush(tp, flags);
1626 return (0);
1627 }
1628 case TIOCDRAIN:
1629 /* Drain TTY output. */
1630 return tty_drain(tp);
1631 case TIOCCONS:
1632 /* Set terminal as console TTY. */
1633 if (*(int *)data) {
1634 error = priv_check(td, PRIV_TTY_CONSOLE);
1635 if (error)
1636 return (error);
1637
1638 /*
1639 * XXX: constty should really need to be locked!
1640 * XXX: allow disconnected constty's to be stolen!
1641 */
1642
1643 if (constty == tp)
1644 return (0);
1645 if (constty != NULL)
1646 return (EBUSY);
1647
1648 tty_unlock(tp);
1649 constty_set(tp);
1650 tty_lock(tp);
1651 } else if (constty == tp) {
1652 constty_clear();
1653 }
1654 return (0);
1655 case TIOCGWINSZ:
1656 /* Obtain window size. */
1657 *(struct winsize*)data = tp->t_winsize;
1658 return (0);
1659 case TIOCSWINSZ:
1660 /* Set window size. */
1661 if (bcmp(&tp->t_winsize, data, sizeof(struct winsize)) == 0)
1662 return (0);
1663 tp->t_winsize = *(struct winsize*)data;
1664 tty_signal_pgrp(tp, SIGWINCH);
1665 return (0);
1666 case TIOCEXCL:
1667 tp->t_flags |= TF_EXCLUDE;
1668 return (0);
1669 case TIOCNXCL:
1670 tp->t_flags &= ~TF_EXCLUDE;
1671 return (0);
1672 case TIOCSTOP:
1673 tp->t_flags |= TF_STOPPED;
1674 ttydevsw_pktnotify(tp, TIOCPKT_STOP);
1675 return (0);
1676 case TIOCSTART:
1677 tp->t_flags &= ~TF_STOPPED;
1678 ttydevsw_outwakeup(tp);
1679 ttydevsw_pktnotify(tp, TIOCPKT_START);
1680 return (0);
1681 case TIOCSTAT:
1682 tty_info(tp);
1683 return (0);
1684 case TIOCSTI:
1685 if ((fflag & FREAD) == 0 && priv_check(td, PRIV_TTY_STI))
1686 return (EPERM);
1687 if (!tty_is_ctty(tp, td->td_proc) &&
1688 priv_check(td, PRIV_TTY_STI))
1689 return (EACCES);
1690 ttydisc_rint(tp, *(char *)data, 0);
1691 ttydisc_rint_done(tp);
1692 return (0);
1693 }
1694
1695#ifdef COMPAT_43TTY
1696 return tty_ioctl_compat(tp, cmd, data, fflag, td);
1697#else /* !COMPAT_43TTY */
1698 return (ENOIOCTL);
1699#endif /* COMPAT_43TTY */
1700}
1701
1702int
1703tty_ioctl(struct tty *tp, u_long cmd, void *data, int fflag, struct thread *td)
1704{
1705 int error;
1706
1707 tty_lock_assert(tp, MA_OWNED);
1708
1709 if (tty_gone(tp))
1710 return (ENXIO);
|
1711
| 1711
|
1712 error = ttydevsw_ioctl(tp, cmd, data, td);
1713 if (error == ENOIOCTL)
1714 error = tty_generic_ioctl(tp, cmd, data, fflag, td);
1715
1716 return (error);
1717}
1718
1719dev_t
1720tty_udev(struct tty *tp)
1721{
1722 if (tp->t_dev)
1723 return dev2udev(tp->t_dev);
1724 else
1725 return NODEV;
1726}
1727
1728int
1729tty_checkoutq(struct tty *tp)
1730{
1731
1732 /* 256 bytes should be enough to print a log message. */
1733 return (ttyoutq_bytesleft(&tp->t_outq) >= 256);
1734}
1735
1736void
1737tty_hiwat_in_block(struct tty *tp)
1738{
1739
1740 if ((tp->t_flags & TF_HIWAT_IN) == 0 &&
1741 tp->t_termios.c_iflag & IXOFF &&
1742 tp->t_termios.c_cc[VSTOP] != _POSIX_VDISABLE) {
1743 /*
1744 * Input flow control. Only enter the high watermark when we
1745 * can successfully store the VSTOP character.
1746 */
1747 if (ttyoutq_write_nofrag(&tp->t_outq,
1748 &tp->t_termios.c_cc[VSTOP], 1) == 0)
1749 tp->t_flags |= TF_HIWAT_IN;
1750 } else {
1751 /* No input flow control. */
1752 tp->t_flags |= TF_HIWAT_IN;
1753 }
1754}
1755
1756void
1757tty_hiwat_in_unblock(struct tty *tp)
1758{
1759
1760 if (tp->t_flags & TF_HIWAT_IN &&
1761 tp->t_termios.c_iflag & IXOFF &&
1762 tp->t_termios.c_cc[VSTART] != _POSIX_VDISABLE) {
1763 /*
1764 * Input flow control. Only leave the high watermark when we
1765 * can successfully store the VSTART character.
1766 */
1767 if (ttyoutq_write_nofrag(&tp->t_outq,
1768 &tp->t_termios.c_cc[VSTART], 1) == 0)
1769 tp->t_flags &= ~TF_HIWAT_IN;
1770 } else {
1771 /* No input flow control. */
1772 tp->t_flags &= ~TF_HIWAT_IN;
1773 }
1774
1775 if (!tty_gone(tp))
1776 ttydevsw_inwakeup(tp);
1777}
1778
1779/*
1780 * TTY hooks interface.
1781 */
1782
1783static int
1784ttyhook_defrint(struct tty *tp, char c, int flags)
1785{
1786
1787 if (ttyhook_rint_bypass(tp, &c, 1) != 1)
1788 return (-1);
| 1712 error = ttydevsw_ioctl(tp, cmd, data, td);
1713 if (error == ENOIOCTL)
1714 error = tty_generic_ioctl(tp, cmd, data, fflag, td);
1715
1716 return (error);
1717}
1718
1719dev_t
1720tty_udev(struct tty *tp)
1721{
1722 if (tp->t_dev)
1723 return dev2udev(tp->t_dev);
1724 else
1725 return NODEV;
1726}
1727
1728int
1729tty_checkoutq(struct tty *tp)
1730{
1731
1732 /* 256 bytes should be enough to print a log message. */
1733 return (ttyoutq_bytesleft(&tp->t_outq) >= 256);
1734}
1735
1736void
1737tty_hiwat_in_block(struct tty *tp)
1738{
1739
1740 if ((tp->t_flags & TF_HIWAT_IN) == 0 &&
1741 tp->t_termios.c_iflag & IXOFF &&
1742 tp->t_termios.c_cc[VSTOP] != _POSIX_VDISABLE) {
1743 /*
1744 * Input flow control. Only enter the high watermark when we
1745 * can successfully store the VSTOP character.
1746 */
1747 if (ttyoutq_write_nofrag(&tp->t_outq,
1748 &tp->t_termios.c_cc[VSTOP], 1) == 0)
1749 tp->t_flags |= TF_HIWAT_IN;
1750 } else {
1751 /* No input flow control. */
1752 tp->t_flags |= TF_HIWAT_IN;
1753 }
1754}
1755
1756void
1757tty_hiwat_in_unblock(struct tty *tp)
1758{
1759
1760 if (tp->t_flags & TF_HIWAT_IN &&
1761 tp->t_termios.c_iflag & IXOFF &&
1762 tp->t_termios.c_cc[VSTART] != _POSIX_VDISABLE) {
1763 /*
1764 * Input flow control. Only leave the high watermark when we
1765 * can successfully store the VSTART character.
1766 */
1767 if (ttyoutq_write_nofrag(&tp->t_outq,
1768 &tp->t_termios.c_cc[VSTART], 1) == 0)
1769 tp->t_flags &= ~TF_HIWAT_IN;
1770 } else {
1771 /* No input flow control. */
1772 tp->t_flags &= ~TF_HIWAT_IN;
1773 }
1774
1775 if (!tty_gone(tp))
1776 ttydevsw_inwakeup(tp);
1777}
1778
1779/*
1780 * TTY hooks interface.
1781 */
1782
1783static int
1784ttyhook_defrint(struct tty *tp, char c, int flags)
1785{
1786
1787 if (ttyhook_rint_bypass(tp, &c, 1) != 1)
1788 return (-1);
|
1789
| 1789
|
1790 return (0);
1791}
1792
1793int
1794ttyhook_register(struct tty **rtp, struct proc *p, int fd,
1795 struct ttyhook *th, void *softc)
1796{
1797 struct tty *tp;
1798 struct file *fp;
1799 struct cdev *dev;
1800 struct cdevsw *cdp;
1801 struct filedesc *fdp;
1802 int error, ref;
1803
1804 /* Validate the file descriptor. */
1805 if ((fdp = p->p_fd) == NULL)
1806 return (EBADF);
1807
1808 fp = fget_unlocked(fdp, fd);
1809 if (fp == NULL)
1810 return (EBADF);
1811 if (fp->f_ops == &badfileops) {
1812 error = EBADF;
1813 goto done1;
1814 }
| 1790 return (0);
1791}
1792
1793int
1794ttyhook_register(struct tty **rtp, struct proc *p, int fd,
1795 struct ttyhook *th, void *softc)
1796{
1797 struct tty *tp;
1798 struct file *fp;
1799 struct cdev *dev;
1800 struct cdevsw *cdp;
1801 struct filedesc *fdp;
1802 int error, ref;
1803
1804 /* Validate the file descriptor. */
1805 if ((fdp = p->p_fd) == NULL)
1806 return (EBADF);
1807
1808 fp = fget_unlocked(fdp, fd);
1809 if (fp == NULL)
1810 return (EBADF);
1811 if (fp->f_ops == &badfileops) {
1812 error = EBADF;
1813 goto done1;
1814 }
|
1815
| 1815
|
1816 /*
1817 * Make sure the vnode is bound to a character device.
1818 * Unlocked check for the vnode type is ok there, because we
1819 * only shall prevent calling devvn_refthread on the file that
1820 * never has been opened over a character device.
1821 */
1822 if (fp->f_type != DTYPE_VNODE || fp->f_vnode->v_type != VCHR) {
1823 error = EINVAL;
1824 goto done1;
1825 }
1826
1827 /* Make sure it is a TTY. */
1828 cdp = devvn_refthread(fp->f_vnode, &dev, &ref);
1829 if (cdp == NULL) {
1830 error = ENXIO;
1831 goto done1;
1832 }
1833 if (dev != fp->f_data) {
1834 error = ENXIO;
1835 goto done2;
1836 }
1837 if (cdp != &ttydev_cdevsw) {
1838 error = ENOTTY;
1839 goto done2;
1840 }
1841 tp = dev->si_drv1;
1842
1843 /* Try to attach the hook to the TTY. */
1844 error = EBUSY;
1845 tty_lock(tp);
1846 MPASS((tp->t_hook == NULL) == ((tp->t_flags & TF_HOOK) == 0));
1847 if (tp->t_flags & TF_HOOK)
1848 goto done3;
1849
1850 tp->t_flags |= TF_HOOK;
1851 tp->t_hook = th;
1852 tp->t_hooksoftc = softc;
1853 *rtp = tp;
1854 error = 0;
1855
1856 /* Maybe we can switch into bypass mode now. */
1857 ttydisc_optimize(tp);
1858
1859 /* Silently convert rint() calls to rint_bypass() when possible. */
1860 if (!ttyhook_hashook(tp, rint) && ttyhook_hashook(tp, rint_bypass))
1861 th->th_rint = ttyhook_defrint;
1862
1863done3: tty_unlock(tp);
1864done2: dev_relthread(dev, ref);
1865done1: fdrop(fp, curthread);
1866 return (error);
1867}
1868
1869void
1870ttyhook_unregister(struct tty *tp)
1871{
1872
1873 tty_lock_assert(tp, MA_OWNED);
1874 MPASS(tp->t_flags & TF_HOOK);
1875
1876 /* Disconnect the hook. */
1877 tp->t_flags &= ~TF_HOOK;
1878 tp->t_hook = NULL;
1879
1880 /* Maybe we need to leave bypass mode. */
1881 ttydisc_optimize(tp);
1882
1883 /* Maybe deallocate the TTY as well. */
1884 tty_rel_free(tp);
1885}
1886
1887/*
1888 * /dev/console handling.
1889 */
1890
1891static int
1892ttyconsdev_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
1893{
1894 struct tty *tp;
1895
1896 /* System has no console device. */
1897 if (dev_console_filename == NULL)
1898 return (ENXIO);
1899
1900 /* Look up corresponding TTY by device name. */
1901 sx_slock(&tty_list_sx);
1902 TAILQ_FOREACH(tp, &tty_list, t_list) {
1903 if (strcmp(dev_console_filename, tty_devname(tp)) == 0) {
1904 dev_console->si_drv1 = tp;
1905 break;
1906 }
1907 }
1908 sx_sunlock(&tty_list_sx);
1909
1910 /* System console has no TTY associated. */
1911 if (dev_console->si_drv1 == NULL)
1912 return (ENXIO);
| 1816 /*
1817 * Make sure the vnode is bound to a character device.
1818 * Unlocked check for the vnode type is ok there, because we
1819 * only shall prevent calling devvn_refthread on the file that
1820 * never has been opened over a character device.
1821 */
1822 if (fp->f_type != DTYPE_VNODE || fp->f_vnode->v_type != VCHR) {
1823 error = EINVAL;
1824 goto done1;
1825 }
1826
1827 /* Make sure it is a TTY. */
1828 cdp = devvn_refthread(fp->f_vnode, &dev, &ref);
1829 if (cdp == NULL) {
1830 error = ENXIO;
1831 goto done1;
1832 }
1833 if (dev != fp->f_data) {
1834 error = ENXIO;
1835 goto done2;
1836 }
1837 if (cdp != &ttydev_cdevsw) {
1838 error = ENOTTY;
1839 goto done2;
1840 }
1841 tp = dev->si_drv1;
1842
1843 /* Try to attach the hook to the TTY. */
1844 error = EBUSY;
1845 tty_lock(tp);
1846 MPASS((tp->t_hook == NULL) == ((tp->t_flags & TF_HOOK) == 0));
1847 if (tp->t_flags & TF_HOOK)
1848 goto done3;
1849
1850 tp->t_flags |= TF_HOOK;
1851 tp->t_hook = th;
1852 tp->t_hooksoftc = softc;
1853 *rtp = tp;
1854 error = 0;
1855
1856 /* Maybe we can switch into bypass mode now. */
1857 ttydisc_optimize(tp);
1858
1859 /* Silently convert rint() calls to rint_bypass() when possible. */
1860 if (!ttyhook_hashook(tp, rint) && ttyhook_hashook(tp, rint_bypass))
1861 th->th_rint = ttyhook_defrint;
1862
1863done3: tty_unlock(tp);
1864done2: dev_relthread(dev, ref);
1865done1: fdrop(fp, curthread);
1866 return (error);
1867}
1868
1869void
1870ttyhook_unregister(struct tty *tp)
1871{
1872
1873 tty_lock_assert(tp, MA_OWNED);
1874 MPASS(tp->t_flags & TF_HOOK);
1875
1876 /* Disconnect the hook. */
1877 tp->t_flags &= ~TF_HOOK;
1878 tp->t_hook = NULL;
1879
1880 /* Maybe we need to leave bypass mode. */
1881 ttydisc_optimize(tp);
1882
1883 /* Maybe deallocate the TTY as well. */
1884 tty_rel_free(tp);
1885}
1886
1887/*
1888 * /dev/console handling.
1889 */
1890
1891static int
1892ttyconsdev_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
1893{
1894 struct tty *tp;
1895
1896 /* System has no console device. */
1897 if (dev_console_filename == NULL)
1898 return (ENXIO);
1899
1900 /* Look up corresponding TTY by device name. */
1901 sx_slock(&tty_list_sx);
1902 TAILQ_FOREACH(tp, &tty_list, t_list) {
1903 if (strcmp(dev_console_filename, tty_devname(tp)) == 0) {
1904 dev_console->si_drv1 = tp;
1905 break;
1906 }
1907 }
1908 sx_sunlock(&tty_list_sx);
1909
1910 /* System console has no TTY associated. */
1911 if (dev_console->si_drv1 == NULL)
1912 return (ENXIO);
|
1913
| 1913
|
1914 return (ttydev_open(dev, oflags, devtype, td));
1915}
1916
1917static int
1918ttyconsdev_write(struct cdev *dev, struct uio *uio, int ioflag)
1919{
1920
1921 log_console(uio);
1922
1923 return (ttydev_write(dev, uio, ioflag));
1924}
1925
1926/*
1927 * /dev/console is a little different than normal TTY's. When opened,
1928 * it determines which TTY to use. When data gets written to it, it
1929 * will be logged in the kernel message buffer.
1930 */
1931static struct cdevsw ttyconsdev_cdevsw = {
1932 .d_version = D_VERSION,
1933 .d_open = ttyconsdev_open,
1934 .d_close = ttydev_close,
1935 .d_read = ttydev_read,
1936 .d_write = ttyconsdev_write,
1937 .d_ioctl = ttydev_ioctl,
1938 .d_kqfilter = ttydev_kqfilter,
1939 .d_poll = ttydev_poll,
1940 .d_mmap = ttydev_mmap,
1941 .d_name = "ttyconsdev",
1942 .d_flags = D_TTY,
1943};
1944
1945static void
1946ttyconsdev_init(void *unused)
1947{
1948
1949 dev_console = make_dev_credf(MAKEDEV_ETERNAL, &ttyconsdev_cdevsw, 0,
1950 NULL, UID_ROOT, GID_WHEEL, 0600, "console");
1951}
1952
1953SYSINIT(tty, SI_SUB_DRIVERS, SI_ORDER_FIRST, ttyconsdev_init, NULL);
1954
1955void
1956ttyconsdev_select(const char *name)
1957{
1958
1959 dev_console_filename = name;
1960}
1961
1962/*
1963 * Debugging routines.
1964 */
1965
1966#include "opt_ddb.h"
1967#ifdef DDB
1968#include <ddb/ddb.h>
1969#include <ddb/db_sym.h>
1970
1971static struct {
1972 int flag;
1973 char val;
1974} ttystates[] = {
1975#if 0
1976 { TF_NOPREFIX, 'N' },
1977#endif
1978 { TF_INITLOCK, 'I' },
1979 { TF_CALLOUT, 'C' },
1980
1981 /* Keep these together -> 'Oi' and 'Oo'. */
1982 { TF_OPENED, 'O' },
1983 { TF_OPENED_IN, 'i' },
1984 { TF_OPENED_OUT, 'o' },
1985 { TF_OPENED_CONS, 'c' },
1986
1987 { TF_GONE, 'G' },
1988 { TF_OPENCLOSE, 'B' },
1989 { TF_ASYNC, 'Y' },
1990 { TF_LITERAL, 'L' },
1991
1992 /* Keep these together -> 'Hi' and 'Ho'. */
1993 { TF_HIWAT, 'H' },
1994 { TF_HIWAT_IN, 'i' },
1995 { TF_HIWAT_OUT, 'o' },
1996
1997 { TF_STOPPED, 'S' },
1998 { TF_EXCLUDE, 'X' },
1999 { TF_BYPASS, 'l' },
2000 { TF_ZOMBIE, 'Z' },
2001 { TF_HOOK, 's' },
2002
2003 /* Keep these together -> 'bi' and 'bo'. */
2004 { TF_BUSY, 'b' },
2005 { TF_BUSY_IN, 'i' },
2006 { TF_BUSY_OUT, 'o' },
2007
2008 { 0, '\0'},
2009};
2010
2011#define TTY_FLAG_BITS \
2012 "\20\1NOPREFIX\2INITLOCK\3CALLOUT\4OPENED_IN\5OPENED_OUT\6GONE" \
2013 "\7OPENCLOSE\10ASYNC\11LITERAL\12HIWAT_IN\13HIWAT_OUT\14STOPPED" \
2014 "\15EXCLUDE\16BYPASS\17ZOMBIE\20HOOK"
2015
2016#define DB_PRINTSYM(name, addr) \
2017 db_printf("%s " #name ": ", sep); \
2018 db_printsym((db_addr_t) addr, DB_STGY_ANY); \
2019 db_printf("\n");
2020
2021static void
2022_db_show_devsw(const char *sep, const struct ttydevsw *tsw)
2023{
2024 db_printf("%sdevsw: ", sep);
2025 db_printsym((db_addr_t)tsw, DB_STGY_ANY);
2026 db_printf(" (%p)\n", tsw);
2027 DB_PRINTSYM(open, tsw->tsw_open);
2028 DB_PRINTSYM(close, tsw->tsw_close);
2029 DB_PRINTSYM(outwakeup, tsw->tsw_outwakeup);
2030 DB_PRINTSYM(inwakeup, tsw->tsw_inwakeup);
2031 DB_PRINTSYM(ioctl, tsw->tsw_ioctl);
2032 DB_PRINTSYM(param, tsw->tsw_param);
2033 DB_PRINTSYM(modem, tsw->tsw_modem);
2034 DB_PRINTSYM(mmap, tsw->tsw_mmap);
2035 DB_PRINTSYM(pktnotify, tsw->tsw_pktnotify);
2036 DB_PRINTSYM(free, tsw->tsw_free);
2037}
2038static void
2039_db_show_hooks(const char *sep, const struct ttyhook *th)
2040{
2041 db_printf("%shook: ", sep);
2042 db_printsym((db_addr_t)th, DB_STGY_ANY);
2043 db_printf(" (%p)\n", th);
2044 if (th == NULL)
2045 return;
2046 DB_PRINTSYM(rint, th->th_rint);
2047 DB_PRINTSYM(rint_bypass, th->th_rint_bypass);
2048 DB_PRINTSYM(rint_done, th->th_rint_done);
2049 DB_PRINTSYM(rint_poll, th->th_rint_poll);
2050 DB_PRINTSYM(getc_inject, th->th_getc_inject);
2051 DB_PRINTSYM(getc_capture, th->th_getc_capture);
2052 DB_PRINTSYM(getc_poll, th->th_getc_poll);
2053 DB_PRINTSYM(close, th->th_close);
2054}
2055
2056static void
2057_db_show_termios(const char *name, const struct termios *t)
2058{
2059
2060 db_printf("%s: iflag 0x%x oflag 0x%x cflag 0x%x "
2061 "lflag 0x%x ispeed %u ospeed %u\n", name,
2062 t->c_iflag, t->c_oflag, t->c_cflag, t->c_lflag,
2063 t->c_ispeed, t->c_ospeed);
2064}
2065
2066/* DDB command to show TTY statistics. */
2067DB_SHOW_COMMAND(tty, db_show_tty)
2068{
2069 struct tty *tp;
2070
2071 if (!have_addr) {
2072 db_printf("usage: show tty <addr>\n");
2073 return;
2074 }
2075 tp = (struct tty *)addr;
2076
2077 db_printf("0x%p: %s\n", tp, tty_devname(tp));
2078 db_printf("\tmtx: %p\n", tp->t_mtx);
2079 db_printf("\tflags: %b\n", tp->t_flags, TTY_FLAG_BITS);
2080 db_printf("\trevokecnt: %u\n", tp->t_revokecnt);
2081
2082 /* Buffering mechanisms. */
2083 db_printf("\tinq: %p begin %u linestart %u reprint %u end %u "
2084 "nblocks %u quota %u\n", &tp->t_inq, tp->t_inq.ti_begin,
2085 tp->t_inq.ti_linestart, tp->t_inq.ti_reprint, tp->t_inq.ti_end,
2086 tp->t_inq.ti_nblocks, tp->t_inq.ti_quota);
2087 db_printf("\toutq: %p begin %u end %u nblocks %u quota %u\n",
2088 &tp->t_outq, tp->t_outq.to_begin, tp->t_outq.to_end,
2089 tp->t_outq.to_nblocks, tp->t_outq.to_quota);
2090 db_printf("\tinlow: %zu\n", tp->t_inlow);
2091 db_printf("\toutlow: %zu\n", tp->t_outlow);
2092 _db_show_termios("\ttermios", &tp->t_termios);
2093 db_printf("\twinsize: row %u col %u xpixel %u ypixel %u\n",
2094 tp->t_winsize.ws_row, tp->t_winsize.ws_col,
2095 tp->t_winsize.ws_xpixel, tp->t_winsize.ws_ypixel);
2096 db_printf("\tcolumn: %u\n", tp->t_column);
2097 db_printf("\twritepos: %u\n", tp->t_writepos);
2098 db_printf("\tcompatflags: 0x%x\n", tp->t_compatflags);
2099
2100 /* Init/lock-state devices. */
2101 _db_show_termios("\ttermios_init_in", &tp->t_termios_init_in);
2102 _db_show_termios("\ttermios_init_out", &tp->t_termios_init_out);
2103 _db_show_termios("\ttermios_lock_in", &tp->t_termios_lock_in);
2104 _db_show_termios("\ttermios_lock_out", &tp->t_termios_lock_out);
2105
2106 /* Hooks */
2107 _db_show_devsw("\t", tp->t_devsw);
2108 _db_show_hooks("\t", tp->t_hook);
2109
2110 /* Process info. */
2111 db_printf("\tpgrp: %p gid %d jobc %d\n", tp->t_pgrp,
2112 tp->t_pgrp ? tp->t_pgrp->pg_id : 0,
2113 tp->t_pgrp ? tp->t_pgrp->pg_jobc : 0);
2114 db_printf("\tsession: %p", tp->t_session);
2115 if (tp->t_session != NULL)
2116 db_printf(" count %u leader %p tty %p sid %d login %s",
2117 tp->t_session->s_count, tp->t_session->s_leader,
2118 tp->t_session->s_ttyp, tp->t_session->s_sid,
2119 tp->t_session->s_login);
2120 db_printf("\n");
2121 db_printf("\tsessioncnt: %u\n", tp->t_sessioncnt);
2122 db_printf("\tdevswsoftc: %p\n", tp->t_devswsoftc);
2123 db_printf("\thooksoftc: %p\n", tp->t_hooksoftc);
2124 db_printf("\tdev: %p\n", tp->t_dev);
2125}
2126
2127/* DDB command to list TTYs. */
2128DB_SHOW_ALL_COMMAND(ttys, db_show_all_ttys)
2129{
2130 struct tty *tp;
2131 size_t isiz, osiz;
2132 int i, j;
2133
2134 /* Make the output look like `pstat -t'. */
2135 db_printf("PTR ");
2136#if defined(__LP64__)
2137 db_printf(" ");
2138#endif
2139 db_printf(" LINE INQ CAN LIN LOW OUTQ USE LOW "
2140 "COL SESS PGID STATE\n");
2141
2142 TAILQ_FOREACH(tp, &tty_list, t_list) {
2143 isiz = tp->t_inq.ti_nblocks * TTYINQ_DATASIZE;
2144 osiz = tp->t_outq.to_nblocks * TTYOUTQ_DATASIZE;
2145
2146 db_printf("%p %10s %5zu %4u %4u %4zu %5zu %4u %4zu %5u %5d %5d ",
2147 tp,
2148 tty_devname(tp),
2149 isiz,
2150 tp->t_inq.ti_linestart - tp->t_inq.ti_begin,
2151 tp->t_inq.ti_end - tp->t_inq.ti_linestart,
2152 isiz - tp->t_inlow,
2153 osiz,
2154 tp->t_outq.to_end - tp->t_outq.to_begin,
2155 osiz - tp->t_outlow,
2156 MIN(tp->t_column, 99999),
2157 tp->t_session ? tp->t_session->s_sid : 0,
2158 tp->t_pgrp ? tp->t_pgrp->pg_id : 0);
2159
2160 /* Flag bits. */
2161 for (i = j = 0; ttystates[i].flag; i++)
2162 if (tp->t_flags & ttystates[i].flag) {
2163 db_printf("%c", ttystates[i].val);
2164 j++;
2165 }
2166 if (j == 0)
2167 db_printf("-");
2168 db_printf("\n");
2169 }
2170}
2171#endif /* DDB */
| 1914 return (ttydev_open(dev, oflags, devtype, td));
1915}
1916
1917static int
1918ttyconsdev_write(struct cdev *dev, struct uio *uio, int ioflag)
1919{
1920
1921 log_console(uio);
1922
1923 return (ttydev_write(dev, uio, ioflag));
1924}
1925
1926/*
1927 * /dev/console is a little different than normal TTY's. When opened,
1928 * it determines which TTY to use. When data gets written to it, it
1929 * will be logged in the kernel message buffer.
1930 */
1931static struct cdevsw ttyconsdev_cdevsw = {
1932 .d_version = D_VERSION,
1933 .d_open = ttyconsdev_open,
1934 .d_close = ttydev_close,
1935 .d_read = ttydev_read,
1936 .d_write = ttyconsdev_write,
1937 .d_ioctl = ttydev_ioctl,
1938 .d_kqfilter = ttydev_kqfilter,
1939 .d_poll = ttydev_poll,
1940 .d_mmap = ttydev_mmap,
1941 .d_name = "ttyconsdev",
1942 .d_flags = D_TTY,
1943};
1944
1945static void
1946ttyconsdev_init(void *unused)
1947{
1948
1949 dev_console = make_dev_credf(MAKEDEV_ETERNAL, &ttyconsdev_cdevsw, 0,
1950 NULL, UID_ROOT, GID_WHEEL, 0600, "console");
1951}
1952
1953SYSINIT(tty, SI_SUB_DRIVERS, SI_ORDER_FIRST, ttyconsdev_init, NULL);
1954
1955void
1956ttyconsdev_select(const char *name)
1957{
1958
1959 dev_console_filename = name;
1960}
1961
1962/*
1963 * Debugging routines.
1964 */
1965
1966#include "opt_ddb.h"
1967#ifdef DDB
1968#include <ddb/ddb.h>
1969#include <ddb/db_sym.h>
1970
1971static struct {
1972 int flag;
1973 char val;
1974} ttystates[] = {
1975#if 0
1976 { TF_NOPREFIX, 'N' },
1977#endif
1978 { TF_INITLOCK, 'I' },
1979 { TF_CALLOUT, 'C' },
1980
1981 /* Keep these together -> 'Oi' and 'Oo'. */
1982 { TF_OPENED, 'O' },
1983 { TF_OPENED_IN, 'i' },
1984 { TF_OPENED_OUT, 'o' },
1985 { TF_OPENED_CONS, 'c' },
1986
1987 { TF_GONE, 'G' },
1988 { TF_OPENCLOSE, 'B' },
1989 { TF_ASYNC, 'Y' },
1990 { TF_LITERAL, 'L' },
1991
1992 /* Keep these together -> 'Hi' and 'Ho'. */
1993 { TF_HIWAT, 'H' },
1994 { TF_HIWAT_IN, 'i' },
1995 { TF_HIWAT_OUT, 'o' },
1996
1997 { TF_STOPPED, 'S' },
1998 { TF_EXCLUDE, 'X' },
1999 { TF_BYPASS, 'l' },
2000 { TF_ZOMBIE, 'Z' },
2001 { TF_HOOK, 's' },
2002
2003 /* Keep these together -> 'bi' and 'bo'. */
2004 { TF_BUSY, 'b' },
2005 { TF_BUSY_IN, 'i' },
2006 { TF_BUSY_OUT, 'o' },
2007
2008 { 0, '\0'},
2009};
2010
2011#define TTY_FLAG_BITS \
2012 "\20\1NOPREFIX\2INITLOCK\3CALLOUT\4OPENED_IN\5OPENED_OUT\6GONE" \
2013 "\7OPENCLOSE\10ASYNC\11LITERAL\12HIWAT_IN\13HIWAT_OUT\14STOPPED" \
2014 "\15EXCLUDE\16BYPASS\17ZOMBIE\20HOOK"
2015
2016#define DB_PRINTSYM(name, addr) \
2017 db_printf("%s " #name ": ", sep); \
2018 db_printsym((db_addr_t) addr, DB_STGY_ANY); \
2019 db_printf("\n");
2020
2021static void
2022_db_show_devsw(const char *sep, const struct ttydevsw *tsw)
2023{
2024 db_printf("%sdevsw: ", sep);
2025 db_printsym((db_addr_t)tsw, DB_STGY_ANY);
2026 db_printf(" (%p)\n", tsw);
2027 DB_PRINTSYM(open, tsw->tsw_open);
2028 DB_PRINTSYM(close, tsw->tsw_close);
2029 DB_PRINTSYM(outwakeup, tsw->tsw_outwakeup);
2030 DB_PRINTSYM(inwakeup, tsw->tsw_inwakeup);
2031 DB_PRINTSYM(ioctl, tsw->tsw_ioctl);
2032 DB_PRINTSYM(param, tsw->tsw_param);
2033 DB_PRINTSYM(modem, tsw->tsw_modem);
2034 DB_PRINTSYM(mmap, tsw->tsw_mmap);
2035 DB_PRINTSYM(pktnotify, tsw->tsw_pktnotify);
2036 DB_PRINTSYM(free, tsw->tsw_free);
2037}
2038static void
2039_db_show_hooks(const char *sep, const struct ttyhook *th)
2040{
2041 db_printf("%shook: ", sep);
2042 db_printsym((db_addr_t)th, DB_STGY_ANY);
2043 db_printf(" (%p)\n", th);
2044 if (th == NULL)
2045 return;
2046 DB_PRINTSYM(rint, th->th_rint);
2047 DB_PRINTSYM(rint_bypass, th->th_rint_bypass);
2048 DB_PRINTSYM(rint_done, th->th_rint_done);
2049 DB_PRINTSYM(rint_poll, th->th_rint_poll);
2050 DB_PRINTSYM(getc_inject, th->th_getc_inject);
2051 DB_PRINTSYM(getc_capture, th->th_getc_capture);
2052 DB_PRINTSYM(getc_poll, th->th_getc_poll);
2053 DB_PRINTSYM(close, th->th_close);
2054}
2055
2056static void
2057_db_show_termios(const char *name, const struct termios *t)
2058{
2059
2060 db_printf("%s: iflag 0x%x oflag 0x%x cflag 0x%x "
2061 "lflag 0x%x ispeed %u ospeed %u\n", name,
2062 t->c_iflag, t->c_oflag, t->c_cflag, t->c_lflag,
2063 t->c_ispeed, t->c_ospeed);
2064}
2065
2066/* DDB command to show TTY statistics. */
2067DB_SHOW_COMMAND(tty, db_show_tty)
2068{
2069 struct tty *tp;
2070
2071 if (!have_addr) {
2072 db_printf("usage: show tty <addr>\n");
2073 return;
2074 }
2075 tp = (struct tty *)addr;
2076
2077 db_printf("0x%p: %s\n", tp, tty_devname(tp));
2078 db_printf("\tmtx: %p\n", tp->t_mtx);
2079 db_printf("\tflags: %b\n", tp->t_flags, TTY_FLAG_BITS);
2080 db_printf("\trevokecnt: %u\n", tp->t_revokecnt);
2081
2082 /* Buffering mechanisms. */
2083 db_printf("\tinq: %p begin %u linestart %u reprint %u end %u "
2084 "nblocks %u quota %u\n", &tp->t_inq, tp->t_inq.ti_begin,
2085 tp->t_inq.ti_linestart, tp->t_inq.ti_reprint, tp->t_inq.ti_end,
2086 tp->t_inq.ti_nblocks, tp->t_inq.ti_quota);
2087 db_printf("\toutq: %p begin %u end %u nblocks %u quota %u\n",
2088 &tp->t_outq, tp->t_outq.to_begin, tp->t_outq.to_end,
2089 tp->t_outq.to_nblocks, tp->t_outq.to_quota);
2090 db_printf("\tinlow: %zu\n", tp->t_inlow);
2091 db_printf("\toutlow: %zu\n", tp->t_outlow);
2092 _db_show_termios("\ttermios", &tp->t_termios);
2093 db_printf("\twinsize: row %u col %u xpixel %u ypixel %u\n",
2094 tp->t_winsize.ws_row, tp->t_winsize.ws_col,
2095 tp->t_winsize.ws_xpixel, tp->t_winsize.ws_ypixel);
2096 db_printf("\tcolumn: %u\n", tp->t_column);
2097 db_printf("\twritepos: %u\n", tp->t_writepos);
2098 db_printf("\tcompatflags: 0x%x\n", tp->t_compatflags);
2099
2100 /* Init/lock-state devices. */
2101 _db_show_termios("\ttermios_init_in", &tp->t_termios_init_in);
2102 _db_show_termios("\ttermios_init_out", &tp->t_termios_init_out);
2103 _db_show_termios("\ttermios_lock_in", &tp->t_termios_lock_in);
2104 _db_show_termios("\ttermios_lock_out", &tp->t_termios_lock_out);
2105
2106 /* Hooks */
2107 _db_show_devsw("\t", tp->t_devsw);
2108 _db_show_hooks("\t", tp->t_hook);
2109
2110 /* Process info. */
2111 db_printf("\tpgrp: %p gid %d jobc %d\n", tp->t_pgrp,
2112 tp->t_pgrp ? tp->t_pgrp->pg_id : 0,
2113 tp->t_pgrp ? tp->t_pgrp->pg_jobc : 0);
2114 db_printf("\tsession: %p", tp->t_session);
2115 if (tp->t_session != NULL)
2116 db_printf(" count %u leader %p tty %p sid %d login %s",
2117 tp->t_session->s_count, tp->t_session->s_leader,
2118 tp->t_session->s_ttyp, tp->t_session->s_sid,
2119 tp->t_session->s_login);
2120 db_printf("\n");
2121 db_printf("\tsessioncnt: %u\n", tp->t_sessioncnt);
2122 db_printf("\tdevswsoftc: %p\n", tp->t_devswsoftc);
2123 db_printf("\thooksoftc: %p\n", tp->t_hooksoftc);
2124 db_printf("\tdev: %p\n", tp->t_dev);
2125}
2126
2127/* DDB command to list TTYs. */
2128DB_SHOW_ALL_COMMAND(ttys, db_show_all_ttys)
2129{
2130 struct tty *tp;
2131 size_t isiz, osiz;
2132 int i, j;
2133
2134 /* Make the output look like `pstat -t'. */
2135 db_printf("PTR ");
2136#if defined(__LP64__)
2137 db_printf(" ");
2138#endif
2139 db_printf(" LINE INQ CAN LIN LOW OUTQ USE LOW "
2140 "COL SESS PGID STATE\n");
2141
2142 TAILQ_FOREACH(tp, &tty_list, t_list) {
2143 isiz = tp->t_inq.ti_nblocks * TTYINQ_DATASIZE;
2144 osiz = tp->t_outq.to_nblocks * TTYOUTQ_DATASIZE;
2145
2146 db_printf("%p %10s %5zu %4u %4u %4zu %5zu %4u %4zu %5u %5d %5d ",
2147 tp,
2148 tty_devname(tp),
2149 isiz,
2150 tp->t_inq.ti_linestart - tp->t_inq.ti_begin,
2151 tp->t_inq.ti_end - tp->t_inq.ti_linestart,
2152 isiz - tp->t_inlow,
2153 osiz,
2154 tp->t_outq.to_end - tp->t_outq.to_begin,
2155 osiz - tp->t_outlow,
2156 MIN(tp->t_column, 99999),
2157 tp->t_session ? tp->t_session->s_sid : 0,
2158 tp->t_pgrp ? tp->t_pgrp->pg_id : 0);
2159
2160 /* Flag bits. */
2161 for (i = j = 0; ttystates[i].flag; i++)
2162 if (tp->t_flags & ttystates[i].flag) {
2163 db_printf("%c", ttystates[i].val);
2164 j++;
2165 }
2166 if (j == 0)
2167 db_printf("-");
2168 db_printf("\n");
2169 }
2170}
2171#endif /* DDB */
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