1/*
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 * @(#)tty_pty.c 8.4 (Berkeley) 2/20/95
30 */
31
32#include <sys/cdefs.h>
| 1/*
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 * @(#)tty_pty.c 8.4 (Berkeley) 2/20/95
30 */
31
32#include <sys/cdefs.h>
|
33__FBSDID("$FreeBSD: head/sys/kern/tty_pty.c 136680 2004-10-18 21:51:27Z phk $");
| 33__FBSDID("$FreeBSD: head/sys/kern/tty_pty.c 139205 2004-12-22 17:37:14Z phk $");
|
34
35/*
36 * Pseudo-teletype Driver
37 * (Actually two drivers, requiring two entries in 'cdevsw')
38 */
39#include "opt_compat.h"
40#include "opt_tty.h"
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/lock.h>
44#include <sys/mutex.h>
45#include <sys/sx.h>
46#ifndef BURN_BRIDGES
47#if defined(COMPAT_43)
48#include <sys/ioctl_compat.h>
49#endif
50#endif
51#include <sys/proc.h>
52#include <sys/tty.h>
53#include <sys/conf.h>
54#include <sys/fcntl.h>
55#include <sys/poll.h>
56#include <sys/kernel.h>
| 34
35/*
36 * Pseudo-teletype Driver
37 * (Actually two drivers, requiring two entries in 'cdevsw')
38 */
39#include "opt_compat.h"
40#include "opt_tty.h"
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/lock.h>
44#include <sys/mutex.h>
45#include <sys/sx.h>
46#ifndef BURN_BRIDGES
47#if defined(COMPAT_43)
48#include <sys/ioctl_compat.h>
49#endif
50#endif
51#include <sys/proc.h>
52#include <sys/tty.h>
53#include <sys/conf.h>
54#include <sys/fcntl.h>
55#include <sys/poll.h>
56#include <sys/kernel.h>
|
57#include <sys/vnode.h>
| 57#include <sys/uio.h>
|
58#include <sys/signalvar.h>
59#include <sys/malloc.h>
60
61static MALLOC_DEFINE(M_PTY, "ptys", "pty data structures");
62
63static void ptsstart(struct tty *tp);
64static void ptsstop(struct tty *tp, int rw);
65static void ptcwakeup(struct tty *tp, int flag);
66static struct cdev *ptyinit(struct cdev *cdev);
67
68static d_open_t ptsopen;
69static d_close_t ptsclose;
70static d_read_t ptsread;
71static d_write_t ptswrite;
72static d_ioctl_t ptsioctl;
73static d_open_t ptcopen;
74static d_close_t ptcclose;
75static d_read_t ptcread;
76static d_ioctl_t ptcioctl;
77static d_write_t ptcwrite;
78static d_poll_t ptcpoll;
79
80#define CDEV_MAJOR_S 5
81static struct cdevsw pts_cdevsw = {
82 .d_version = D_VERSION,
83 .d_open = ptsopen,
84 .d_close = ptsclose,
85 .d_read = ptsread,
86 .d_write = ptswrite,
87 .d_ioctl = ptsioctl,
88 .d_name = "pts",
89 .d_maj = CDEV_MAJOR_S,
90 .d_flags = D_TTY | D_NEEDGIANT,
91};
92
93#define CDEV_MAJOR_C 6
94static struct cdevsw ptc_cdevsw = {
95 .d_version = D_VERSION,
96 .d_open = ptcopen,
97 .d_close = ptcclose,
98 .d_read = ptcread,
99 .d_write = ptcwrite,
100 .d_ioctl = ptcioctl,
101 .d_poll = ptcpoll,
102 .d_name = "ptc",
103 .d_maj = CDEV_MAJOR_C,
104 .d_flags = D_TTY | D_NEEDGIANT,
105};
106
107#define BUFSIZ 100 /* Chunk size iomoved to/from user */
108
109struct ptsc {
110 int pt_flags;
111 struct selinfo pt_selr, pt_selw;
112 u_char pt_send;
113 u_char pt_ucntl;
114 struct tty *pt_tty;
115 struct cdev *devs, *devc;
116 struct prison *pt_prison;
117};
118
119#define PF_PKT 0x08 /* packet mode */
120#define PF_STOPPED 0x10 /* user told stopped */
121#define PF_NOSTOP 0x40
122#define PF_UCNTL 0x80 /* user control mode */
123
124#define TSA_PTC_READ(tp) ((void *)&(tp)->t_outq.c_cf)
125#define TSA_PTC_WRITE(tp) ((void *)&(tp)->t_rawq.c_cl)
126#define TSA_PTS_READ(tp) ((void *)&(tp)->t_canq)
127
128static char *names = "pqrsPQRS";
129/*
130 * This function creates and initializes a pts/ptc pair
131 *
132 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
133 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
134 *
135 * XXX: define and add mapping of upper minor bits to allow more
136 * than 256 ptys.
137 */
138static struct cdev *
139ptyinit(struct cdev *devc)
140{
141 struct cdev *devs;
142 struct ptsc *pt;
143 int n;
144
145 n = minor(devc);
146 /* For now we only map the lower 8 bits of the minor */
147 if (n & ~0xff)
148 return (NULL);
149
150 devc->si_flags &= ~SI_CHEAPCLONE;
151
152 pt = malloc(sizeof(*pt), M_PTY, M_WAITOK | M_ZERO);
153 pt->devs = devs = make_dev(&pts_cdevsw, n,
154 UID_ROOT, GID_WHEEL, 0666, "tty%c%r", names[n / 32], n % 32);
155 pt->devc = devc;
156
157 pt->pt_tty = ttymalloc(pt->pt_tty);
158 pt->pt_tty->t_sc = pt;
159 devs->si_drv1 = devc->si_drv1 = pt;
160 devs->si_tty = devc->si_tty = pt->pt_tty;
161 pt->pt_tty->t_dev = devs;
162 return (devc);
163}
164
165/*ARGSUSED*/
166static int
167ptsopen(struct cdev *dev, int flag, int devtype, struct thread *td)
168{
169 struct tty *tp;
170 int error;
171 struct ptsc *pt;
172
173 if (!dev->si_drv1)
174 return(ENXIO);
175 pt = dev->si_drv1;
176 tp = dev->si_tty;
177 if ((tp->t_state & TS_ISOPEN) == 0) {
178 ttyinitmode(tp, 1, 0);
179 } else if (tp->t_state & TS_XCLUDE && suser(td))
180 return (EBUSY);
181 else if (pt->pt_prison != td->td_ucred->cr_prison)
182 return (EBUSY);
183 if (tp->t_oproc) /* Ctrlr still around. */
184 (void)ttyld_modem(tp, 1);
185 while ((tp->t_state & TS_CARR_ON) == 0) {
186 if (flag&FNONBLOCK)
187 break;
188 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH,
189 "ptsopn", 0);
190 if (error)
191 return (error);
192 }
193 error = ttyld_open(tp, dev);
194 if (error == 0)
195 ptcwakeup(tp, FREAD|FWRITE);
196 return (error);
197}
198
199static int
200ptsclose(struct cdev *dev, int flag, int mode, struct thread *td)
201{
202 struct tty *tp;
203 int err;
204
205 tp = dev->si_tty;
206 err = ttyld_close(tp, flag);
207 (void) tty_close(tp);
208 return (err);
209}
210
211static int
212ptsread(struct cdev *dev, struct uio *uio, int flag)
213{
214 struct tty *tp = dev->si_tty;
215 int error = 0;
216
217 if (tp->t_oproc)
218 error = ttyld_read(tp, uio, flag);
219 ptcwakeup(tp, FWRITE);
220 return (error);
221}
222
223/*
224 * Write to pseudo-tty.
225 * Wakeups of controlling tty will happen
226 * indirectly, when tty driver calls ptsstart.
227 */
228static int
229ptswrite(struct cdev *dev, struct uio *uio, int flag)
230{
231 struct tty *tp;
232
233 tp = dev->si_tty;
234 if (tp->t_oproc == 0)
235 return (EIO);
236 return (ttyld_write(tp, uio, flag));
237}
238
239/*
240 * Start output on pseudo-tty.
241 * Wake up process selecting or sleeping for input from controlling tty.
242 */
243static void
244ptsstart(struct tty *tp)
245{
246 struct ptsc *pt = tp->t_sc;
247
248 if (tp->t_state & TS_TTSTOP)
249 return;
250 if (pt->pt_flags & PF_STOPPED) {
251 pt->pt_flags &= ~PF_STOPPED;
252 pt->pt_send = TIOCPKT_START;
253 }
254 ptcwakeup(tp, FREAD);
255}
256
257static void
258ptcwakeup(struct tty *tp, int flag)
259{
260 struct ptsc *pt = tp->t_sc;
261
262 if (flag & FREAD) {
263 selwakeuppri(&pt->pt_selr, TTIPRI);
264 wakeup(TSA_PTC_READ(tp));
265 }
266 if (flag & FWRITE) {
267 selwakeuppri(&pt->pt_selw, TTOPRI);
268 wakeup(TSA_PTC_WRITE(tp));
269 }
270}
271
272static int
273ptcopen(struct cdev *dev, int flag, int devtype, struct thread *td)
274{
275 struct tty *tp;
276 struct ptsc *pt;
277
278 if (!dev->si_drv1)
279 ptyinit(dev);
280 if (!dev->si_drv1)
281 return(ENXIO);
282 tp = dev->si_tty;
283 if (tp->t_oproc)
284 return (EIO);
285 tp->t_timeout = -1;
286 tp->t_oproc = ptsstart;
287 tp->t_stop = ptsstop;
288 (void)ttyld_modem(tp, 1);
289 tp->t_lflag &= ~EXTPROC;
290 pt = dev->si_drv1;
291 pt->pt_prison = td->td_ucred->cr_prison;
292 pt->pt_flags = 0;
293 pt->pt_send = 0;
294 pt->pt_ucntl = 0;
295 return (0);
296}
297
298static int
299ptcclose(struct cdev *dev, int flags, int fmt, struct thread *td)
300{
301 struct tty *tp;
302
303 tp = dev->si_tty;
304 (void)ttyld_modem(tp, 0);
305
306 /*
307 * XXX MDMBUF makes no sense for ptys but would inhibit the above
308 * l_modem(). CLOCAL makes sense but isn't supported. Special
309 * l_modem()s that ignore carrier drop make no sense for ptys but
310 * may be in use because other parts of the line discipline make
311 * sense for ptys. Recover by doing everything that a normal
312 * ttymodem() would have done except for sending a SIGHUP.
313 */
314 if (tp->t_state & TS_ISOPEN) {
315 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED);
316 tp->t_state |= TS_ZOMBIE;
317 ttyflush(tp, FREAD | FWRITE);
318 }
319
320 tp->t_oproc = 0; /* mark closed */
321 return (0);
322}
323
324static int
325ptcread(struct cdev *dev, struct uio *uio, int flag)
326{
327 struct tty *tp = dev->si_tty;
328 struct ptsc *pt = dev->si_drv1;
329 char buf[BUFSIZ];
330 int error = 0, cc;
331
332 /*
333 * We want to block until the slave
334 * is open, and there's something to read;
335 * but if we lost the slave or we're NBIO,
336 * then return the appropriate error instead.
337 */
338 for (;;) {
339 if (tp->t_state&TS_ISOPEN) {
340 if (pt->pt_flags&PF_PKT && pt->pt_send) {
341 error = ureadc((int)pt->pt_send, uio);
342 if (error)
343 return (error);
344 if (pt->pt_send & TIOCPKT_IOCTL) {
345 cc = min(uio->uio_resid,
346 sizeof(tp->t_termios));
347 uiomove(&tp->t_termios, cc, uio);
348 }
349 pt->pt_send = 0;
350 return (0);
351 }
352 if (pt->pt_flags&PF_UCNTL && pt->pt_ucntl) {
353 error = ureadc((int)pt->pt_ucntl, uio);
354 if (error)
355 return (error);
356 pt->pt_ucntl = 0;
357 return (0);
358 }
359 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0)
360 break;
361 }
362 if ((tp->t_state & TS_CONNECTED) == 0)
363 return (0); /* EOF */
| 58#include <sys/signalvar.h>
59#include <sys/malloc.h>
60
61static MALLOC_DEFINE(M_PTY, "ptys", "pty data structures");
62
63static void ptsstart(struct tty *tp);
64static void ptsstop(struct tty *tp, int rw);
65static void ptcwakeup(struct tty *tp, int flag);
66static struct cdev *ptyinit(struct cdev *cdev);
67
68static d_open_t ptsopen;
69static d_close_t ptsclose;
70static d_read_t ptsread;
71static d_write_t ptswrite;
72static d_ioctl_t ptsioctl;
73static d_open_t ptcopen;
74static d_close_t ptcclose;
75static d_read_t ptcread;
76static d_ioctl_t ptcioctl;
77static d_write_t ptcwrite;
78static d_poll_t ptcpoll;
79
80#define CDEV_MAJOR_S 5
81static struct cdevsw pts_cdevsw = {
82 .d_version = D_VERSION,
83 .d_open = ptsopen,
84 .d_close = ptsclose,
85 .d_read = ptsread,
86 .d_write = ptswrite,
87 .d_ioctl = ptsioctl,
88 .d_name = "pts",
89 .d_maj = CDEV_MAJOR_S,
90 .d_flags = D_TTY | D_NEEDGIANT,
91};
92
93#define CDEV_MAJOR_C 6
94static struct cdevsw ptc_cdevsw = {
95 .d_version = D_VERSION,
96 .d_open = ptcopen,
97 .d_close = ptcclose,
98 .d_read = ptcread,
99 .d_write = ptcwrite,
100 .d_ioctl = ptcioctl,
101 .d_poll = ptcpoll,
102 .d_name = "ptc",
103 .d_maj = CDEV_MAJOR_C,
104 .d_flags = D_TTY | D_NEEDGIANT,
105};
106
107#define BUFSIZ 100 /* Chunk size iomoved to/from user */
108
109struct ptsc {
110 int pt_flags;
111 struct selinfo pt_selr, pt_selw;
112 u_char pt_send;
113 u_char pt_ucntl;
114 struct tty *pt_tty;
115 struct cdev *devs, *devc;
116 struct prison *pt_prison;
117};
118
119#define PF_PKT 0x08 /* packet mode */
120#define PF_STOPPED 0x10 /* user told stopped */
121#define PF_NOSTOP 0x40
122#define PF_UCNTL 0x80 /* user control mode */
123
124#define TSA_PTC_READ(tp) ((void *)&(tp)->t_outq.c_cf)
125#define TSA_PTC_WRITE(tp) ((void *)&(tp)->t_rawq.c_cl)
126#define TSA_PTS_READ(tp) ((void *)&(tp)->t_canq)
127
128static char *names = "pqrsPQRS";
129/*
130 * This function creates and initializes a pts/ptc pair
131 *
132 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
133 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
134 *
135 * XXX: define and add mapping of upper minor bits to allow more
136 * than 256 ptys.
137 */
138static struct cdev *
139ptyinit(struct cdev *devc)
140{
141 struct cdev *devs;
142 struct ptsc *pt;
143 int n;
144
145 n = minor(devc);
146 /* For now we only map the lower 8 bits of the minor */
147 if (n & ~0xff)
148 return (NULL);
149
150 devc->si_flags &= ~SI_CHEAPCLONE;
151
152 pt = malloc(sizeof(*pt), M_PTY, M_WAITOK | M_ZERO);
153 pt->devs = devs = make_dev(&pts_cdevsw, n,
154 UID_ROOT, GID_WHEEL, 0666, "tty%c%r", names[n / 32], n % 32);
155 pt->devc = devc;
156
157 pt->pt_tty = ttymalloc(pt->pt_tty);
158 pt->pt_tty->t_sc = pt;
159 devs->si_drv1 = devc->si_drv1 = pt;
160 devs->si_tty = devc->si_tty = pt->pt_tty;
161 pt->pt_tty->t_dev = devs;
162 return (devc);
163}
164
165/*ARGSUSED*/
166static int
167ptsopen(struct cdev *dev, int flag, int devtype, struct thread *td)
168{
169 struct tty *tp;
170 int error;
171 struct ptsc *pt;
172
173 if (!dev->si_drv1)
174 return(ENXIO);
175 pt = dev->si_drv1;
176 tp = dev->si_tty;
177 if ((tp->t_state & TS_ISOPEN) == 0) {
178 ttyinitmode(tp, 1, 0);
179 } else if (tp->t_state & TS_XCLUDE && suser(td))
180 return (EBUSY);
181 else if (pt->pt_prison != td->td_ucred->cr_prison)
182 return (EBUSY);
183 if (tp->t_oproc) /* Ctrlr still around. */
184 (void)ttyld_modem(tp, 1);
185 while ((tp->t_state & TS_CARR_ON) == 0) {
186 if (flag&FNONBLOCK)
187 break;
188 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH,
189 "ptsopn", 0);
190 if (error)
191 return (error);
192 }
193 error = ttyld_open(tp, dev);
194 if (error == 0)
195 ptcwakeup(tp, FREAD|FWRITE);
196 return (error);
197}
198
199static int
200ptsclose(struct cdev *dev, int flag, int mode, struct thread *td)
201{
202 struct tty *tp;
203 int err;
204
205 tp = dev->si_tty;
206 err = ttyld_close(tp, flag);
207 (void) tty_close(tp);
208 return (err);
209}
210
211static int
212ptsread(struct cdev *dev, struct uio *uio, int flag)
213{
214 struct tty *tp = dev->si_tty;
215 int error = 0;
216
217 if (tp->t_oproc)
218 error = ttyld_read(tp, uio, flag);
219 ptcwakeup(tp, FWRITE);
220 return (error);
221}
222
223/*
224 * Write to pseudo-tty.
225 * Wakeups of controlling tty will happen
226 * indirectly, when tty driver calls ptsstart.
227 */
228static int
229ptswrite(struct cdev *dev, struct uio *uio, int flag)
230{
231 struct tty *tp;
232
233 tp = dev->si_tty;
234 if (tp->t_oproc == 0)
235 return (EIO);
236 return (ttyld_write(tp, uio, flag));
237}
238
239/*
240 * Start output on pseudo-tty.
241 * Wake up process selecting or sleeping for input from controlling tty.
242 */
243static void
244ptsstart(struct tty *tp)
245{
246 struct ptsc *pt = tp->t_sc;
247
248 if (tp->t_state & TS_TTSTOP)
249 return;
250 if (pt->pt_flags & PF_STOPPED) {
251 pt->pt_flags &= ~PF_STOPPED;
252 pt->pt_send = TIOCPKT_START;
253 }
254 ptcwakeup(tp, FREAD);
255}
256
257static void
258ptcwakeup(struct tty *tp, int flag)
259{
260 struct ptsc *pt = tp->t_sc;
261
262 if (flag & FREAD) {
263 selwakeuppri(&pt->pt_selr, TTIPRI);
264 wakeup(TSA_PTC_READ(tp));
265 }
266 if (flag & FWRITE) {
267 selwakeuppri(&pt->pt_selw, TTOPRI);
268 wakeup(TSA_PTC_WRITE(tp));
269 }
270}
271
272static int
273ptcopen(struct cdev *dev, int flag, int devtype, struct thread *td)
274{
275 struct tty *tp;
276 struct ptsc *pt;
277
278 if (!dev->si_drv1)
279 ptyinit(dev);
280 if (!dev->si_drv1)
281 return(ENXIO);
282 tp = dev->si_tty;
283 if (tp->t_oproc)
284 return (EIO);
285 tp->t_timeout = -1;
286 tp->t_oproc = ptsstart;
287 tp->t_stop = ptsstop;
288 (void)ttyld_modem(tp, 1);
289 tp->t_lflag &= ~EXTPROC;
290 pt = dev->si_drv1;
291 pt->pt_prison = td->td_ucred->cr_prison;
292 pt->pt_flags = 0;
293 pt->pt_send = 0;
294 pt->pt_ucntl = 0;
295 return (0);
296}
297
298static int
299ptcclose(struct cdev *dev, int flags, int fmt, struct thread *td)
300{
301 struct tty *tp;
302
303 tp = dev->si_tty;
304 (void)ttyld_modem(tp, 0);
305
306 /*
307 * XXX MDMBUF makes no sense for ptys but would inhibit the above
308 * l_modem(). CLOCAL makes sense but isn't supported. Special
309 * l_modem()s that ignore carrier drop make no sense for ptys but
310 * may be in use because other parts of the line discipline make
311 * sense for ptys. Recover by doing everything that a normal
312 * ttymodem() would have done except for sending a SIGHUP.
313 */
314 if (tp->t_state & TS_ISOPEN) {
315 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED);
316 tp->t_state |= TS_ZOMBIE;
317 ttyflush(tp, FREAD | FWRITE);
318 }
319
320 tp->t_oproc = 0; /* mark closed */
321 return (0);
322}
323
324static int
325ptcread(struct cdev *dev, struct uio *uio, int flag)
326{
327 struct tty *tp = dev->si_tty;
328 struct ptsc *pt = dev->si_drv1;
329 char buf[BUFSIZ];
330 int error = 0, cc;
331
332 /*
333 * We want to block until the slave
334 * is open, and there's something to read;
335 * but if we lost the slave or we're NBIO,
336 * then return the appropriate error instead.
337 */
338 for (;;) {
339 if (tp->t_state&TS_ISOPEN) {
340 if (pt->pt_flags&PF_PKT && pt->pt_send) {
341 error = ureadc((int)pt->pt_send, uio);
342 if (error)
343 return (error);
344 if (pt->pt_send & TIOCPKT_IOCTL) {
345 cc = min(uio->uio_resid,
346 sizeof(tp->t_termios));
347 uiomove(&tp->t_termios, cc, uio);
348 }
349 pt->pt_send = 0;
350 return (0);
351 }
352 if (pt->pt_flags&PF_UCNTL && pt->pt_ucntl) {
353 error = ureadc((int)pt->pt_ucntl, uio);
354 if (error)
355 return (error);
356 pt->pt_ucntl = 0;
357 return (0);
358 }
359 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0)
360 break;
361 }
362 if ((tp->t_state & TS_CONNECTED) == 0)
363 return (0); /* EOF */
|
364 if (flag & IO_NDELAY)
| 364 if (flag & O_NONBLOCK)
|
365 return (EWOULDBLOCK);
366 error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0);
367 if (error)
368 return (error);
369 }
370 if (pt->pt_flags & (PF_PKT|PF_UCNTL))
371 error = ureadc(0, uio);
372 while (uio->uio_resid > 0 && error == 0) {
373 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ));
374 if (cc <= 0)
375 break;
376 error = uiomove(buf, cc, uio);
377 }
378 ttwwakeup(tp);
379 return (error);
380}
381
382static void
383ptsstop(struct tty *tp, int flush)
384{
385 struct ptsc *pt = tp->t_sc;
386 int flag;
387
388 /* note: FLUSHREAD and FLUSHWRITE already ok */
389 if (flush == 0) {
390 flush = TIOCPKT_STOP;
391 pt->pt_flags |= PF_STOPPED;
392 } else
393 pt->pt_flags &= ~PF_STOPPED;
394 pt->pt_send |= flush;
395 /* change of perspective */
396 flag = 0;
397 if (flush & FREAD)
398 flag |= FWRITE;
399 if (flush & FWRITE)
400 flag |= FREAD;
401 ptcwakeup(tp, flag);
402}
403
404static int
405ptcpoll(struct cdev *dev, int events, struct thread *td)
406{
407 struct tty *tp = dev->si_tty;
408 struct ptsc *pt = dev->si_drv1;
409 int revents = 0;
410 int s;
411
412 if ((tp->t_state & TS_CONNECTED) == 0)
413 return (events &
414 (POLLHUP | POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM));
415
416 /*
417 * Need to block timeouts (ttrstart).
418 */
419 s = spltty();
420
421 if (events & (POLLIN | POLLRDNORM))
422 if ((tp->t_state & TS_ISOPEN) &&
423 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) ||
424 ((pt->pt_flags & PF_PKT) && pt->pt_send) ||
425 ((pt->pt_flags & PF_UCNTL) && pt->pt_ucntl)))
426 revents |= events & (POLLIN | POLLRDNORM);
427
428 if (events & (POLLOUT | POLLWRNORM))
429 if (tp->t_state & TS_ISOPEN &&
430 (((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) ||
431 (tp->t_canq.c_cc == 0 && (tp->t_lflag & ICANON)))))
432 revents |= events & (POLLOUT | POLLWRNORM);
433
434 if (events & POLLHUP)
435 if ((tp->t_state & TS_CARR_ON) == 0)
436 revents |= POLLHUP;
437
438 if (revents == 0) {
439 if (events & (POLLIN | POLLRDNORM))
440 selrecord(td, &pt->pt_selr);
441
442 if (events & (POLLOUT | POLLWRNORM))
443 selrecord(td, &pt->pt_selw);
444 }
445 splx(s);
446
447 return (revents);
448}
449
450static int
451ptcwrite(struct cdev *dev, struct uio *uio, int flag)
452{
453 struct tty *tp = dev->si_tty;
454 u_char *cp = 0;
455 int cc = 0;
456 u_char locbuf[BUFSIZ];
457 int cnt = 0;
458 int error = 0;
459
460again:
461 if ((tp->t_state&TS_ISOPEN) == 0)
462 goto block;
463 while (uio->uio_resid > 0 || cc > 0) {
464 if (cc == 0) {
465 cc = min(uio->uio_resid, BUFSIZ);
466 cp = locbuf;
467 error = uiomove(cp, cc, uio);
468 if (error)
469 return (error);
470 /* check again for safety */
471 if ((tp->t_state & TS_ISOPEN) == 0) {
472 /* adjust for data copied in but not written */
473 uio->uio_resid += cc;
474 return (EIO);
475 }
476 }
477 while (cc > 0) {
478 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 &&
479 (tp->t_canq.c_cc > 0 || !(tp->t_lflag&ICANON))) {
480 wakeup(TSA_HUP_OR_INPUT(tp));
481 goto block;
482 }
483 ttyld_rint(tp, *cp++);
484 cnt++;
485 cc--;
486 }
487 cc = 0;
488 }
489 return (0);
490block:
491 /*
492 * Come here to wait for slave to open, for space
493 * in outq, or space in rawq, or an empty canq.
494 */
495 if ((tp->t_state & TS_CONNECTED) == 0) {
496 /* adjust for data copied in but not written */
497 uio->uio_resid += cc;
498 return (EIO);
499 }
| 365 return (EWOULDBLOCK);
366 error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0);
367 if (error)
368 return (error);
369 }
370 if (pt->pt_flags & (PF_PKT|PF_UCNTL))
371 error = ureadc(0, uio);
372 while (uio->uio_resid > 0 && error == 0) {
373 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ));
374 if (cc <= 0)
375 break;
376 error = uiomove(buf, cc, uio);
377 }
378 ttwwakeup(tp);
379 return (error);
380}
381
382static void
383ptsstop(struct tty *tp, int flush)
384{
385 struct ptsc *pt = tp->t_sc;
386 int flag;
387
388 /* note: FLUSHREAD and FLUSHWRITE already ok */
389 if (flush == 0) {
390 flush = TIOCPKT_STOP;
391 pt->pt_flags |= PF_STOPPED;
392 } else
393 pt->pt_flags &= ~PF_STOPPED;
394 pt->pt_send |= flush;
395 /* change of perspective */
396 flag = 0;
397 if (flush & FREAD)
398 flag |= FWRITE;
399 if (flush & FWRITE)
400 flag |= FREAD;
401 ptcwakeup(tp, flag);
402}
403
404static int
405ptcpoll(struct cdev *dev, int events, struct thread *td)
406{
407 struct tty *tp = dev->si_tty;
408 struct ptsc *pt = dev->si_drv1;
409 int revents = 0;
410 int s;
411
412 if ((tp->t_state & TS_CONNECTED) == 0)
413 return (events &
414 (POLLHUP | POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM));
415
416 /*
417 * Need to block timeouts (ttrstart).
418 */
419 s = spltty();
420
421 if (events & (POLLIN | POLLRDNORM))
422 if ((tp->t_state & TS_ISOPEN) &&
423 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) ||
424 ((pt->pt_flags & PF_PKT) && pt->pt_send) ||
425 ((pt->pt_flags & PF_UCNTL) && pt->pt_ucntl)))
426 revents |= events & (POLLIN | POLLRDNORM);
427
428 if (events & (POLLOUT | POLLWRNORM))
429 if (tp->t_state & TS_ISOPEN &&
430 (((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) ||
431 (tp->t_canq.c_cc == 0 && (tp->t_lflag & ICANON)))))
432 revents |= events & (POLLOUT | POLLWRNORM);
433
434 if (events & POLLHUP)
435 if ((tp->t_state & TS_CARR_ON) == 0)
436 revents |= POLLHUP;
437
438 if (revents == 0) {
439 if (events & (POLLIN | POLLRDNORM))
440 selrecord(td, &pt->pt_selr);
441
442 if (events & (POLLOUT | POLLWRNORM))
443 selrecord(td, &pt->pt_selw);
444 }
445 splx(s);
446
447 return (revents);
448}
449
450static int
451ptcwrite(struct cdev *dev, struct uio *uio, int flag)
452{
453 struct tty *tp = dev->si_tty;
454 u_char *cp = 0;
455 int cc = 0;
456 u_char locbuf[BUFSIZ];
457 int cnt = 0;
458 int error = 0;
459
460again:
461 if ((tp->t_state&TS_ISOPEN) == 0)
462 goto block;
463 while (uio->uio_resid > 0 || cc > 0) {
464 if (cc == 0) {
465 cc = min(uio->uio_resid, BUFSIZ);
466 cp = locbuf;
467 error = uiomove(cp, cc, uio);
468 if (error)
469 return (error);
470 /* check again for safety */
471 if ((tp->t_state & TS_ISOPEN) == 0) {
472 /* adjust for data copied in but not written */
473 uio->uio_resid += cc;
474 return (EIO);
475 }
476 }
477 while (cc > 0) {
478 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 &&
479 (tp->t_canq.c_cc > 0 || !(tp->t_lflag&ICANON))) {
480 wakeup(TSA_HUP_OR_INPUT(tp));
481 goto block;
482 }
483 ttyld_rint(tp, *cp++);
484 cnt++;
485 cc--;
486 }
487 cc = 0;
488 }
489 return (0);
490block:
491 /*
492 * Come here to wait for slave to open, for space
493 * in outq, or space in rawq, or an empty canq.
494 */
495 if ((tp->t_state & TS_CONNECTED) == 0) {
496 /* adjust for data copied in but not written */
497 uio->uio_resid += cc;
498 return (EIO);
499 }
|
500 if (flag & IO_NDELAY) {
| 500 if (flag & O_NONBLOCK) {
|
501 /* adjust for data copied in but not written */
502 uio->uio_resid += cc;
503 if (cnt == 0)
504 return (EWOULDBLOCK);
505 return (0);
506 }
507 error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0);
508 if (error) {
509 /* adjust for data copied in but not written */
510 uio->uio_resid += cc;
511 return (error);
512 }
513 goto again;
514}
515
516/*ARGSUSED*/
517static int
518ptcioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
519{
520 struct tty *tp = dev->si_tty;
521 struct ptsc *pt = dev->si_drv1;
522
523 switch (cmd) {
524
525 case TIOCGPGRP:
526 /*
527 * We avoid calling ttioctl on the controller since,
528 * in that case, tp must be the controlling terminal.
529 */
530 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0;
531 return (0);
532
533 case TIOCPKT:
534 if (*(int *)data) {
535 if (pt->pt_flags & PF_UCNTL)
536 return (EINVAL);
537 pt->pt_flags |= PF_PKT;
538 } else
539 pt->pt_flags &= ~PF_PKT;
540 return (0);
541
542 case TIOCUCNTL:
543 if (*(int *)data) {
544 if (pt->pt_flags & PF_PKT)
545 return (EINVAL);
546 pt->pt_flags |= PF_UCNTL;
547 } else
548 pt->pt_flags &= ~PF_UCNTL;
549 return (0);
550 }
551
552 /*
553 * The rest of the ioctls shouldn't be called until
554 * the slave is open.
555 */
556 if ((tp->t_state & TS_ISOPEN) == 0)
557 return (EAGAIN);
558
559 switch (cmd) {
560#ifndef BURN_BRIDGES
561#ifdef COMPAT_43
562 case TIOCSETP:
563 case TIOCSETN:
564#endif
565#endif
566 case TIOCSETD:
567 case TIOCSETA:
568 case TIOCSETAW:
569 case TIOCSETAF:
570 /*
571 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG.
572 * ttywflush(tp) will hang if there are characters in
573 * the outq.
574 */
575 ndflush(&tp->t_outq, tp->t_outq.c_cc);
576 break;
577
578 case TIOCSIG:
579 if (*(unsigned int *)data >= NSIG ||
580 *(unsigned int *)data == 0)
581 return(EINVAL);
582 if ((tp->t_lflag&NOFLSH) == 0)
583 ttyflush(tp, FREAD|FWRITE);
584 if (tp->t_pgrp != NULL) {
585 PGRP_LOCK(tp->t_pgrp);
586 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1);
587 PGRP_UNLOCK(tp->t_pgrp);
588 }
589 if ((*(unsigned int *)data == SIGINFO) &&
590 ((tp->t_lflag&NOKERNINFO) == 0))
591 ttyinfo(tp);
592 return(0);
593 }
594
595 return (ptsioctl(dev, cmd, data, flag, td));
596}
597
598/*ARGSUSED*/
599static int
600ptsioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
601{
602 struct tty *tp = dev->si_tty;
603 struct ptsc *pt = dev->si_drv1;
604 u_char *cc = tp->t_cc;
605 int stop, error;
606
607 if (cmd == TIOCEXT) {
608 /*
609 * When the EXTPROC bit is being toggled, we need
610 * to send an TIOCPKT_IOCTL if the packet driver
611 * is turned on.
612 */
613 if (*(int *)data) {
614 if (pt->pt_flags & PF_PKT) {
615 pt->pt_send |= TIOCPKT_IOCTL;
616 ptcwakeup(tp, FREAD);
617 }
618 tp->t_lflag |= EXTPROC;
619 } else {
620 if ((tp->t_lflag & EXTPROC) &&
621 (pt->pt_flags & PF_PKT)) {
622 pt->pt_send |= TIOCPKT_IOCTL;
623 ptcwakeup(tp, FREAD);
624 }
625 tp->t_lflag &= ~EXTPROC;
626 }
627 return(0);
628 }
629 error = ttyioctl(dev, cmd, data, flag, td);
630 if (error == ENOTTY) {
631 if (pt->pt_flags & PF_UCNTL &&
632 (cmd & ~0xff) == UIOCCMD(0)) {
633 if (cmd & 0xff) {
634 pt->pt_ucntl = (u_char)cmd;
635 ptcwakeup(tp, FREAD);
636 }
637 return (0);
638 }
639 error = ENOTTY;
640 }
641 /*
642 * If external processing and packet mode send ioctl packet.
643 */
644 if ((tp->t_lflag&EXTPROC) && (pt->pt_flags & PF_PKT)) {
645 switch(cmd) {
646 case TIOCSETA:
647 case TIOCSETAW:
648 case TIOCSETAF:
649#ifndef BURN_BRIDGES
650#ifdef COMPAT_43
651 case TIOCSETP:
652 case TIOCSETN:
653 case TIOCSETC:
654 case TIOCSLTC:
655 case TIOCLBIS:
656 case TIOCLBIC:
657 case TIOCLSET:
658#endif
659#endif
660 pt->pt_send |= TIOCPKT_IOCTL;
661 ptcwakeup(tp, FREAD);
662 break;
663 default:
664 break;
665 }
666 }
667 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s'))
668 && CCEQ(cc[VSTART], CTRL('q'));
669 if (pt->pt_flags & PF_NOSTOP) {
670 if (stop) {
671 pt->pt_send &= ~TIOCPKT_NOSTOP;
672 pt->pt_send |= TIOCPKT_DOSTOP;
673 pt->pt_flags &= ~PF_NOSTOP;
674 ptcwakeup(tp, FREAD);
675 }
676 } else {
677 if (!stop) {
678 pt->pt_send &= ~TIOCPKT_DOSTOP;
679 pt->pt_send |= TIOCPKT_NOSTOP;
680 pt->pt_flags |= PF_NOSTOP;
681 ptcwakeup(tp, FREAD);
682 }
683 }
684 return (error);
685}
686
687static void
688pty_clone(void *arg, char *name, int namelen, struct cdev **dev)
689{
690 int u;
691
692 if (*dev != NULL)
693 return;
694 if (bcmp(name, "pty", 3) != 0)
695 return;
696 if (name[5] != '\0')
697 return;
698 switch (name[3]) {
699 case 'p': u = 0; break;
700 case 'q': u = 32; break;
701 case 'r': u = 64; break;
702 case 's': u = 96; break;
703 case 'P': u = 128; break;
704 case 'Q': u = 160; break;
705 case 'R': u = 192; break;
706 case 'S': u = 224; break;
707 default: return;
708 }
709 if (name[4] >= '0' && name[4] <= '9')
710 u += name[4] - '0';
711 else if (name[4] >= 'a' && name[4] <= 'v')
712 u += name[4] - 'a' + 10;
713 else
714 return;
715 *dev = make_dev(&ptc_cdevsw, u,
716 UID_ROOT, GID_WHEEL, 0666, "pty%c%r", names[u / 32], u % 32);
717 (*dev)->si_flags |= SI_CHEAPCLONE;
718 return;
719}
720
721static void
722ptc_drvinit(void *unused)
723{
724
725 EVENTHANDLER_REGISTER(dev_clone, pty_clone, 0, 1000);
726}
727
728SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL)
| 501 /* adjust for data copied in but not written */
502 uio->uio_resid += cc;
503 if (cnt == 0)
504 return (EWOULDBLOCK);
505 return (0);
506 }
507 error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0);
508 if (error) {
509 /* adjust for data copied in but not written */
510 uio->uio_resid += cc;
511 return (error);
512 }
513 goto again;
514}
515
516/*ARGSUSED*/
517static int
518ptcioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
519{
520 struct tty *tp = dev->si_tty;
521 struct ptsc *pt = dev->si_drv1;
522
523 switch (cmd) {
524
525 case TIOCGPGRP:
526 /*
527 * We avoid calling ttioctl on the controller since,
528 * in that case, tp must be the controlling terminal.
529 */
530 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0;
531 return (0);
532
533 case TIOCPKT:
534 if (*(int *)data) {
535 if (pt->pt_flags & PF_UCNTL)
536 return (EINVAL);
537 pt->pt_flags |= PF_PKT;
538 } else
539 pt->pt_flags &= ~PF_PKT;
540 return (0);
541
542 case TIOCUCNTL:
543 if (*(int *)data) {
544 if (pt->pt_flags & PF_PKT)
545 return (EINVAL);
546 pt->pt_flags |= PF_UCNTL;
547 } else
548 pt->pt_flags &= ~PF_UCNTL;
549 return (0);
550 }
551
552 /*
553 * The rest of the ioctls shouldn't be called until
554 * the slave is open.
555 */
556 if ((tp->t_state & TS_ISOPEN) == 0)
557 return (EAGAIN);
558
559 switch (cmd) {
560#ifndef BURN_BRIDGES
561#ifdef COMPAT_43
562 case TIOCSETP:
563 case TIOCSETN:
564#endif
565#endif
566 case TIOCSETD:
567 case TIOCSETA:
568 case TIOCSETAW:
569 case TIOCSETAF:
570 /*
571 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG.
572 * ttywflush(tp) will hang if there are characters in
573 * the outq.
574 */
575 ndflush(&tp->t_outq, tp->t_outq.c_cc);
576 break;
577
578 case TIOCSIG:
579 if (*(unsigned int *)data >= NSIG ||
580 *(unsigned int *)data == 0)
581 return(EINVAL);
582 if ((tp->t_lflag&NOFLSH) == 0)
583 ttyflush(tp, FREAD|FWRITE);
584 if (tp->t_pgrp != NULL) {
585 PGRP_LOCK(tp->t_pgrp);
586 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1);
587 PGRP_UNLOCK(tp->t_pgrp);
588 }
589 if ((*(unsigned int *)data == SIGINFO) &&
590 ((tp->t_lflag&NOKERNINFO) == 0))
591 ttyinfo(tp);
592 return(0);
593 }
594
595 return (ptsioctl(dev, cmd, data, flag, td));
596}
597
598/*ARGSUSED*/
599static int
600ptsioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
601{
602 struct tty *tp = dev->si_tty;
603 struct ptsc *pt = dev->si_drv1;
604 u_char *cc = tp->t_cc;
605 int stop, error;
606
607 if (cmd == TIOCEXT) {
608 /*
609 * When the EXTPROC bit is being toggled, we need
610 * to send an TIOCPKT_IOCTL if the packet driver
611 * is turned on.
612 */
613 if (*(int *)data) {
614 if (pt->pt_flags & PF_PKT) {
615 pt->pt_send |= TIOCPKT_IOCTL;
616 ptcwakeup(tp, FREAD);
617 }
618 tp->t_lflag |= EXTPROC;
619 } else {
620 if ((tp->t_lflag & EXTPROC) &&
621 (pt->pt_flags & PF_PKT)) {
622 pt->pt_send |= TIOCPKT_IOCTL;
623 ptcwakeup(tp, FREAD);
624 }
625 tp->t_lflag &= ~EXTPROC;
626 }
627 return(0);
628 }
629 error = ttyioctl(dev, cmd, data, flag, td);
630 if (error == ENOTTY) {
631 if (pt->pt_flags & PF_UCNTL &&
632 (cmd & ~0xff) == UIOCCMD(0)) {
633 if (cmd & 0xff) {
634 pt->pt_ucntl = (u_char)cmd;
635 ptcwakeup(tp, FREAD);
636 }
637 return (0);
638 }
639 error = ENOTTY;
640 }
641 /*
642 * If external processing and packet mode send ioctl packet.
643 */
644 if ((tp->t_lflag&EXTPROC) && (pt->pt_flags & PF_PKT)) {
645 switch(cmd) {
646 case TIOCSETA:
647 case TIOCSETAW:
648 case TIOCSETAF:
649#ifndef BURN_BRIDGES
650#ifdef COMPAT_43
651 case TIOCSETP:
652 case TIOCSETN:
653 case TIOCSETC:
654 case TIOCSLTC:
655 case TIOCLBIS:
656 case TIOCLBIC:
657 case TIOCLSET:
658#endif
659#endif
660 pt->pt_send |= TIOCPKT_IOCTL;
661 ptcwakeup(tp, FREAD);
662 break;
663 default:
664 break;
665 }
666 }
667 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s'))
668 && CCEQ(cc[VSTART], CTRL('q'));
669 if (pt->pt_flags & PF_NOSTOP) {
670 if (stop) {
671 pt->pt_send &= ~TIOCPKT_NOSTOP;
672 pt->pt_send |= TIOCPKT_DOSTOP;
673 pt->pt_flags &= ~PF_NOSTOP;
674 ptcwakeup(tp, FREAD);
675 }
676 } else {
677 if (!stop) {
678 pt->pt_send &= ~TIOCPKT_DOSTOP;
679 pt->pt_send |= TIOCPKT_NOSTOP;
680 pt->pt_flags |= PF_NOSTOP;
681 ptcwakeup(tp, FREAD);
682 }
683 }
684 return (error);
685}
686
687static void
688pty_clone(void *arg, char *name, int namelen, struct cdev **dev)
689{
690 int u;
691
692 if (*dev != NULL)
693 return;
694 if (bcmp(name, "pty", 3) != 0)
695 return;
696 if (name[5] != '\0')
697 return;
698 switch (name[3]) {
699 case 'p': u = 0; break;
700 case 'q': u = 32; break;
701 case 'r': u = 64; break;
702 case 's': u = 96; break;
703 case 'P': u = 128; break;
704 case 'Q': u = 160; break;
705 case 'R': u = 192; break;
706 case 'S': u = 224; break;
707 default: return;
708 }
709 if (name[4] >= '0' && name[4] <= '9')
710 u += name[4] - '0';
711 else if (name[4] >= 'a' && name[4] <= 'v')
712 u += name[4] - 'a' + 10;
713 else
714 return;
715 *dev = make_dev(&ptc_cdevsw, u,
716 UID_ROOT, GID_WHEEL, 0666, "pty%c%r", names[u / 32], u % 32);
717 (*dev)->si_flags |= SI_CHEAPCLONE;
718 return;
719}
720
721static void
722ptc_drvinit(void *unused)
723{
724
725 EVENTHANDLER_REGISTER(dev_clone, pty_clone, 0, 1000);
726}
727
728SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL)
|