1/*
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)tty_pty.c 8.4 (Berkeley) 2/20/95
| 1/*
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)tty_pty.c 8.4 (Berkeley) 2/20/95
|
34 * $FreeBSD: head/sys/kern/tty_pty.c 50477 1999-08-28 01:08:13Z peter $
| 34 * $FreeBSD: head/sys/kern/tty_pty.c 50652 1999-08-30 10:35:37Z phk $
|
35 */
36
37/*
38 * Pseudo-teletype Driver
39 * (Actually two drivers, requiring two entries in 'cdevsw')
40 */
41#include "pty.h" /* XXX */
42#include "opt_compat.h"
43#include <sys/param.h>
44#include <sys/systm.h>
45#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
46#include <sys/ioctl_compat.h>
47#endif
48#include <sys/proc.h>
49#include <sys/tty.h>
50#include <sys/conf.h>
51#include <sys/fcntl.h>
52#include <sys/poll.h>
53#include <sys/kernel.h>
54#include <sys/vnode.h>
55#include <sys/signalvar.h>
56#include <sys/malloc.h>
57
58MALLOC_DEFINE(M_PTY, "ptys", "pty data structures");
59
60static void ptsstart __P((struct tty *tp));
61static void ptcwakeup __P((struct tty *tp, int flag));
62static void ptyinit __P((int n));
63
64static d_open_t ptsopen;
65static d_close_t ptsclose;
66static d_read_t ptsread;
67static d_write_t ptswrite;
68static d_ioctl_t ptyioctl;
69static d_stop_t ptsstop;
70static d_devtotty_t ptydevtotty;
71static d_open_t ptcopen;
72static d_close_t ptcclose;
73static d_read_t ptcread;
74static d_write_t ptcwrite;
75static d_poll_t ptcpoll;
76
77#define CDEV_MAJOR_S 5
78static struct cdevsw pts_cdevsw = {
79 /* open */ ptsopen,
80 /* close */ ptsclose,
81 /* read */ ptsread,
82 /* write */ ptswrite,
83 /* ioctl */ ptyioctl,
84 /* stop */ ptsstop,
85 /* reset */ noreset,
86 /* devtotty */ ptydevtotty,
87 /* poll */ ttpoll,
88 /* mmap */ nommap,
89 /* strategy */ nostrategy,
90 /* name */ "pts",
91 /* parms */ noparms,
92 /* maj */ CDEV_MAJOR_S,
93 /* dump */ nodump,
94 /* psize */ nopsize,
95 /* flags */ D_TTY,
96 /* maxio */ 0,
97 /* bmaj */ -1
98};
99
100#define CDEV_MAJOR_C 6
101static struct cdevsw ptc_cdevsw = {
102 /* open */ ptcopen,
103 /* close */ ptcclose,
104 /* read */ ptcread,
105 /* write */ ptcwrite,
106 /* ioctl */ ptyioctl,
107 /* stop */ nostop,
108 /* reset */ noreset,
109 /* devtotty */ ptydevtotty,
110 /* poll */ ptcpoll,
111 /* mmap */ nommap,
112 /* strategy */ nostrategy,
113 /* name */ "ptc",
114 /* parms */ noparms,
115 /* maj */ CDEV_MAJOR_C,
116 /* dump */ nodump,
117 /* psize */ nopsize,
118 /* flags */ D_TTY,
119 /* maxio */ 0,
120 /* bmaj */ -1
121};
122
123#define BUFSIZ 100 /* Chunk size iomoved to/from user */
124
125struct pt_ioctl {
126 int pt_flags;
127 struct selinfo pt_selr, pt_selw;
128 u_char pt_send;
129 u_char pt_ucntl;
130 struct tty pt_tty;
131 dev_t devs, devc;
132};
133
134#define PF_PKT 0x08 /* packet mode */
135#define PF_STOPPED 0x10 /* user told stopped */
136#define PF_REMOTE 0x20 /* remote and flow controlled input */
137#define PF_NOSTOP 0x40
138#define PF_UCNTL 0x80 /* user control mode */
139
140/*
141 * This function creates and initializes a pts/ptc pair
142 *
143 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
144 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
145 *
146 * XXX: define and add mapping of upper minor bits to allow more
147 * than 256 ptys.
148 */
149static void
150ptyinit(n)
151 int n;
152{
153 dev_t devs, devc;
154 char *names = "pqrsPQRS";
155 struct pt_ioctl *pt;
156
157 /* For now we only map the lower 8 bits of the minor */
158 if (n & ~0xff)
159 return;
160
161 pt = malloc(sizeof(*pt), M_PTY, M_WAITOK);
162 bzero(pt, sizeof(*pt));
163 pt->devs = devs = make_dev(&pts_cdevsw, n,
164 0, 0, 0666, "tty%c%r", names[n / 32], n % 32);
165 pt->devc = devc = make_dev(&ptc_cdevsw, n,
166 0, 0, 0666, "pty%c%r", names[n / 32], n % 32);
167
168 devs->si_drv1 = devc->si_drv1 = pt;
| 35 */
36
37/*
38 * Pseudo-teletype Driver
39 * (Actually two drivers, requiring two entries in 'cdevsw')
40 */
41#include "pty.h" /* XXX */
42#include "opt_compat.h"
43#include <sys/param.h>
44#include <sys/systm.h>
45#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
46#include <sys/ioctl_compat.h>
47#endif
48#include <sys/proc.h>
49#include <sys/tty.h>
50#include <sys/conf.h>
51#include <sys/fcntl.h>
52#include <sys/poll.h>
53#include <sys/kernel.h>
54#include <sys/vnode.h>
55#include <sys/signalvar.h>
56#include <sys/malloc.h>
57
58MALLOC_DEFINE(M_PTY, "ptys", "pty data structures");
59
60static void ptsstart __P((struct tty *tp));
61static void ptcwakeup __P((struct tty *tp, int flag));
62static void ptyinit __P((int n));
63
64static d_open_t ptsopen;
65static d_close_t ptsclose;
66static d_read_t ptsread;
67static d_write_t ptswrite;
68static d_ioctl_t ptyioctl;
69static d_stop_t ptsstop;
70static d_devtotty_t ptydevtotty;
71static d_open_t ptcopen;
72static d_close_t ptcclose;
73static d_read_t ptcread;
74static d_write_t ptcwrite;
75static d_poll_t ptcpoll;
76
77#define CDEV_MAJOR_S 5
78static struct cdevsw pts_cdevsw = {
79 /* open */ ptsopen,
80 /* close */ ptsclose,
81 /* read */ ptsread,
82 /* write */ ptswrite,
83 /* ioctl */ ptyioctl,
84 /* stop */ ptsstop,
85 /* reset */ noreset,
86 /* devtotty */ ptydevtotty,
87 /* poll */ ttpoll,
88 /* mmap */ nommap,
89 /* strategy */ nostrategy,
90 /* name */ "pts",
91 /* parms */ noparms,
92 /* maj */ CDEV_MAJOR_S,
93 /* dump */ nodump,
94 /* psize */ nopsize,
95 /* flags */ D_TTY,
96 /* maxio */ 0,
97 /* bmaj */ -1
98};
99
100#define CDEV_MAJOR_C 6
101static struct cdevsw ptc_cdevsw = {
102 /* open */ ptcopen,
103 /* close */ ptcclose,
104 /* read */ ptcread,
105 /* write */ ptcwrite,
106 /* ioctl */ ptyioctl,
107 /* stop */ nostop,
108 /* reset */ noreset,
109 /* devtotty */ ptydevtotty,
110 /* poll */ ptcpoll,
111 /* mmap */ nommap,
112 /* strategy */ nostrategy,
113 /* name */ "ptc",
114 /* parms */ noparms,
115 /* maj */ CDEV_MAJOR_C,
116 /* dump */ nodump,
117 /* psize */ nopsize,
118 /* flags */ D_TTY,
119 /* maxio */ 0,
120 /* bmaj */ -1
121};
122
123#define BUFSIZ 100 /* Chunk size iomoved to/from user */
124
125struct pt_ioctl {
126 int pt_flags;
127 struct selinfo pt_selr, pt_selw;
128 u_char pt_send;
129 u_char pt_ucntl;
130 struct tty pt_tty;
131 dev_t devs, devc;
132};
133
134#define PF_PKT 0x08 /* packet mode */
135#define PF_STOPPED 0x10 /* user told stopped */
136#define PF_REMOTE 0x20 /* remote and flow controlled input */
137#define PF_NOSTOP 0x40
138#define PF_UCNTL 0x80 /* user control mode */
139
140/*
141 * This function creates and initializes a pts/ptc pair
142 *
143 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
144 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
145 *
146 * XXX: define and add mapping of upper minor bits to allow more
147 * than 256 ptys.
148 */
149static void
150ptyinit(n)
151 int n;
152{
153 dev_t devs, devc;
154 char *names = "pqrsPQRS";
155 struct pt_ioctl *pt;
156
157 /* For now we only map the lower 8 bits of the minor */
158 if (n & ~0xff)
159 return;
160
161 pt = malloc(sizeof(*pt), M_PTY, M_WAITOK);
162 bzero(pt, sizeof(*pt));
163 pt->devs = devs = make_dev(&pts_cdevsw, n,
164 0, 0, 0666, "tty%c%r", names[n / 32], n % 32);
165 pt->devc = devc = make_dev(&ptc_cdevsw, n,
166 0, 0, 0666, "pty%c%r", names[n / 32], n % 32);
167
168 devs->si_drv1 = devc->si_drv1 = pt;
|
169 devs->si_tty_tty = devc->si_tty_tty = &pt->pt_tty;
| 169 devs->si_tty = devc->si_tty = &pt->pt_tty;
|
170 ttyregister(&pt->pt_tty);
171}
172
173/*ARGSUSED*/
174static int
175ptsopen(dev, flag, devtype, p)
176 dev_t dev;
177 int flag, devtype;
178 struct proc *p;
179{
180 register struct tty *tp;
181 int error;
182 int minr;
183 dev_t nextdev;
184
185 /*
186 * XXX: Gross hack for DEVFS:
187 * If we openned this device, ensure we have the
188 * next one too, so people can open it.
189 */
190 minr = lminor(dev);
191 if (minr < 255) {
192 nextdev = makedev(major(dev), minr + 1);
193 if (!nextdev->si_drv1) {
194 ptyinit(minr + 1);
195 }
196 }
197 if (!dev->si_drv1)
198 ptyinit(minor(dev));
199 if (!dev->si_drv1)
200 return(ENXIO);
| 170 ttyregister(&pt->pt_tty);
171}
172
173/*ARGSUSED*/
174static int
175ptsopen(dev, flag, devtype, p)
176 dev_t dev;
177 int flag, devtype;
178 struct proc *p;
179{
180 register struct tty *tp;
181 int error;
182 int minr;
183 dev_t nextdev;
184
185 /*
186 * XXX: Gross hack for DEVFS:
187 * If we openned this device, ensure we have the
188 * next one too, so people can open it.
189 */
190 minr = lminor(dev);
191 if (minr < 255) {
192 nextdev = makedev(major(dev), minr + 1);
193 if (!nextdev->si_drv1) {
194 ptyinit(minr + 1);
195 }
196 }
197 if (!dev->si_drv1)
198 ptyinit(minor(dev));
199 if (!dev->si_drv1)
200 return(ENXIO);
|
201 tp = dev->si_tty_tty;
| 201 tp = dev->si_tty;
|
202 if ((tp->t_state & TS_ISOPEN) == 0) {
203 ttychars(tp); /* Set up default chars */
204 tp->t_iflag = TTYDEF_IFLAG;
205 tp->t_oflag = TTYDEF_OFLAG;
206 tp->t_lflag = TTYDEF_LFLAG;
207 tp->t_cflag = TTYDEF_CFLAG;
208 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
209 } else if (tp->t_state & TS_XCLUDE && suser(p))
210 return (EBUSY);
211 if (tp->t_oproc) /* Ctrlr still around. */
212 (void)(*linesw[tp->t_line].l_modem)(tp, 1);
213 while ((tp->t_state & TS_CARR_ON) == 0) {
214 if (flag&FNONBLOCK)
215 break;
216 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH,
217 "ptsopn", 0);
218 if (error)
219 return (error);
220 }
221 error = (*linesw[tp->t_line].l_open)(dev, tp);
222 if (error == 0)
223 ptcwakeup(tp, FREAD|FWRITE);
224 return (error);
225}
226
227static int
228ptsclose(dev, flag, mode, p)
229 dev_t dev;
230 int flag, mode;
231 struct proc *p;
232{
233 register struct tty *tp;
234 int err;
235
| 202 if ((tp->t_state & TS_ISOPEN) == 0) {
203 ttychars(tp); /* Set up default chars */
204 tp->t_iflag = TTYDEF_IFLAG;
205 tp->t_oflag = TTYDEF_OFLAG;
206 tp->t_lflag = TTYDEF_LFLAG;
207 tp->t_cflag = TTYDEF_CFLAG;
208 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
209 } else if (tp->t_state & TS_XCLUDE && suser(p))
210 return (EBUSY);
211 if (tp->t_oproc) /* Ctrlr still around. */
212 (void)(*linesw[tp->t_line].l_modem)(tp, 1);
213 while ((tp->t_state & TS_CARR_ON) == 0) {
214 if (flag&FNONBLOCK)
215 break;
216 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH,
217 "ptsopn", 0);
218 if (error)
219 return (error);
220 }
221 error = (*linesw[tp->t_line].l_open)(dev, tp);
222 if (error == 0)
223 ptcwakeup(tp, FREAD|FWRITE);
224 return (error);
225}
226
227static int
228ptsclose(dev, flag, mode, p)
229 dev_t dev;
230 int flag, mode;
231 struct proc *p;
232{
233 register struct tty *tp;
234 int err;
235
|
236 tp = dev->si_tty_tty;
| 236 tp = dev->si_tty;
|
237 err = (*linesw[tp->t_line].l_close)(tp, flag);
238 ptsstop(tp, FREAD|FWRITE);
239 (void) ttyclose(tp);
240 return (err);
241}
242
243static int
244ptsread(dev, uio, flag)
245 dev_t dev;
246 struct uio *uio;
247 int flag;
248{
249 struct proc *p = curproc;
| 237 err = (*linesw[tp->t_line].l_close)(tp, flag);
238 ptsstop(tp, FREAD|FWRITE);
239 (void) ttyclose(tp);
240 return (err);
241}
242
243static int
244ptsread(dev, uio, flag)
245 dev_t dev;
246 struct uio *uio;
247 int flag;
248{
249 struct proc *p = curproc;
|
250 register struct tty *tp = dev->si_tty_tty;
| 250 register struct tty *tp = dev->si_tty;
|
251 register struct pt_ioctl *pti = dev->si_drv1;
252 int error = 0;
253
254again:
255 if (pti->pt_flags & PF_REMOTE) {
256 while (isbackground(p, tp)) {
257 if ((p->p_sigignore & sigmask(SIGTTIN)) ||
258 (p->p_sigmask & sigmask(SIGTTIN)) ||
259 p->p_pgrp->pg_jobc == 0 ||
260 p->p_flag & P_PPWAIT)
261 return (EIO);
262 pgsignal(p->p_pgrp, SIGTTIN, 1);
263 error = ttysleep(tp, &lbolt, TTIPRI | PCATCH, "ptsbg",
264 0);
265 if (error)
266 return (error);
267 }
268 if (tp->t_canq.c_cc == 0) {
269 if (flag & IO_NDELAY)
270 return (EWOULDBLOCK);
271 error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH,
272 "ptsin", 0);
273 if (error)
274 return (error);
275 goto again;
276 }
277 while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0)
278 if (ureadc(getc(&tp->t_canq), uio) < 0) {
279 error = EFAULT;
280 break;
281 }
282 if (tp->t_canq.c_cc == 1)
283 (void) getc(&tp->t_canq);
284 if (tp->t_canq.c_cc)
285 return (error);
286 } else
287 if (tp->t_oproc)
288 error = (*linesw[tp->t_line].l_read)(tp, uio, flag);
289 ptcwakeup(tp, FWRITE);
290 return (error);
291}
292
293/*
294 * Write to pseudo-tty.
295 * Wakeups of controlling tty will happen
296 * indirectly, when tty driver calls ptsstart.
297 */
298static int
299ptswrite(dev, uio, flag)
300 dev_t dev;
301 struct uio *uio;
302 int flag;
303{
304 register struct tty *tp;
305
| 251 register struct pt_ioctl *pti = dev->si_drv1;
252 int error = 0;
253
254again:
255 if (pti->pt_flags & PF_REMOTE) {
256 while (isbackground(p, tp)) {
257 if ((p->p_sigignore & sigmask(SIGTTIN)) ||
258 (p->p_sigmask & sigmask(SIGTTIN)) ||
259 p->p_pgrp->pg_jobc == 0 ||
260 p->p_flag & P_PPWAIT)
261 return (EIO);
262 pgsignal(p->p_pgrp, SIGTTIN, 1);
263 error = ttysleep(tp, &lbolt, TTIPRI | PCATCH, "ptsbg",
264 0);
265 if (error)
266 return (error);
267 }
268 if (tp->t_canq.c_cc == 0) {
269 if (flag & IO_NDELAY)
270 return (EWOULDBLOCK);
271 error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH,
272 "ptsin", 0);
273 if (error)
274 return (error);
275 goto again;
276 }
277 while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0)
278 if (ureadc(getc(&tp->t_canq), uio) < 0) {
279 error = EFAULT;
280 break;
281 }
282 if (tp->t_canq.c_cc == 1)
283 (void) getc(&tp->t_canq);
284 if (tp->t_canq.c_cc)
285 return (error);
286 } else
287 if (tp->t_oproc)
288 error = (*linesw[tp->t_line].l_read)(tp, uio, flag);
289 ptcwakeup(tp, FWRITE);
290 return (error);
291}
292
293/*
294 * Write to pseudo-tty.
295 * Wakeups of controlling tty will happen
296 * indirectly, when tty driver calls ptsstart.
297 */
298static int
299ptswrite(dev, uio, flag)
300 dev_t dev;
301 struct uio *uio;
302 int flag;
303{
304 register struct tty *tp;
305
|
306 tp = dev->si_tty_tty;
| 306 tp = dev->si_tty;
|
307 if (tp->t_oproc == 0)
308 return (EIO);
309 return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
310}
311
312/*
313 * Start output on pseudo-tty.
314 * Wake up process selecting or sleeping for input from controlling tty.
315 */
316static void
317ptsstart(tp)
318 struct tty *tp;
319{
320 register struct pt_ioctl *pti = tp->t_dev->si_drv1;
321
322 if (tp->t_state & TS_TTSTOP)
323 return;
324 if (pti->pt_flags & PF_STOPPED) {
325 pti->pt_flags &= ~PF_STOPPED;
326 pti->pt_send = TIOCPKT_START;
327 }
328 ptcwakeup(tp, FREAD);
329}
330
331static void
332ptcwakeup(tp, flag)
333 struct tty *tp;
334 int flag;
335{
336 struct pt_ioctl *pti = tp->t_dev->si_drv1;
337
338 if (flag & FREAD) {
339 selwakeup(&pti->pt_selr);
340 wakeup(TSA_PTC_READ(tp));
341 }
342 if (flag & FWRITE) {
343 selwakeup(&pti->pt_selw);
344 wakeup(TSA_PTC_WRITE(tp));
345 }
346}
347
348static int
349ptcopen(dev, flag, devtype, p)
350 dev_t dev;
351 int flag, devtype;
352 struct proc *p;
353{
354 register struct tty *tp;
355 struct pt_ioctl *pti;
356
357 if (!dev->si_drv1)
358 ptyinit(minor(dev));
359 if (!dev->si_drv1)
360 return(ENXIO);
| 307 if (tp->t_oproc == 0)
308 return (EIO);
309 return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
310}
311
312/*
313 * Start output on pseudo-tty.
314 * Wake up process selecting or sleeping for input from controlling tty.
315 */
316static void
317ptsstart(tp)
318 struct tty *tp;
319{
320 register struct pt_ioctl *pti = tp->t_dev->si_drv1;
321
322 if (tp->t_state & TS_TTSTOP)
323 return;
324 if (pti->pt_flags & PF_STOPPED) {
325 pti->pt_flags &= ~PF_STOPPED;
326 pti->pt_send = TIOCPKT_START;
327 }
328 ptcwakeup(tp, FREAD);
329}
330
331static void
332ptcwakeup(tp, flag)
333 struct tty *tp;
334 int flag;
335{
336 struct pt_ioctl *pti = tp->t_dev->si_drv1;
337
338 if (flag & FREAD) {
339 selwakeup(&pti->pt_selr);
340 wakeup(TSA_PTC_READ(tp));
341 }
342 if (flag & FWRITE) {
343 selwakeup(&pti->pt_selw);
344 wakeup(TSA_PTC_WRITE(tp));
345 }
346}
347
348static int
349ptcopen(dev, flag, devtype, p)
350 dev_t dev;
351 int flag, devtype;
352 struct proc *p;
353{
354 register struct tty *tp;
355 struct pt_ioctl *pti;
356
357 if (!dev->si_drv1)
358 ptyinit(minor(dev));
359 if (!dev->si_drv1)
360 return(ENXIO);
|
361 tp = dev->si_tty_tty;
| 361 tp = dev->si_tty;
|
362 if (tp->t_oproc)
363 return (EIO);
364 tp->t_oproc = ptsstart;
365 (void)(*linesw[tp->t_line].l_modem)(tp, 1);
366 tp->t_lflag &= ~EXTPROC;
367 pti = dev->si_drv1;
368 pti->pt_flags = 0;
369 pti->pt_send = 0;
370 pti->pt_ucntl = 0;
371 return (0);
372}
373
374static int
375ptcclose(dev, flags, fmt, p)
376 dev_t dev;
377 int flags;
378 int fmt;
379 struct proc *p;
380{
381 register struct tty *tp;
382
| 362 if (tp->t_oproc)
363 return (EIO);
364 tp->t_oproc = ptsstart;
365 (void)(*linesw[tp->t_line].l_modem)(tp, 1);
366 tp->t_lflag &= ~EXTPROC;
367 pti = dev->si_drv1;
368 pti->pt_flags = 0;
369 pti->pt_send = 0;
370 pti->pt_ucntl = 0;
371 return (0);
372}
373
374static int
375ptcclose(dev, flags, fmt, p)
376 dev_t dev;
377 int flags;
378 int fmt;
379 struct proc *p;
380{
381 register struct tty *tp;
382
|
383 tp = dev->si_tty_tty;
| 383 tp = dev->si_tty;
|
384 (void)(*linesw[tp->t_line].l_modem)(tp, 0);
385
386 /*
387 * XXX MDMBUF makes no sense for ptys but would inhibit the above
388 * l_modem(). CLOCAL makes sense but isn't supported. Special
389 * l_modem()s that ignore carrier drop make no sense for ptys but
390 * may be in use because other parts of the line discipline make
391 * sense for ptys. Recover by doing everything that a normal
392 * ttymodem() would have done except for sending a SIGHUP.
393 */
394 if (tp->t_state & TS_ISOPEN) {
395 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED);
396 tp->t_state |= TS_ZOMBIE;
397 ttyflush(tp, FREAD | FWRITE);
398 }
399
400 tp->t_oproc = 0; /* mark closed */
401 return (0);
402}
403
404static int
405ptcread(dev, uio, flag)
406 dev_t dev;
407 struct uio *uio;
408 int flag;
409{
| 384 (void)(*linesw[tp->t_line].l_modem)(tp, 0);
385
386 /*
387 * XXX MDMBUF makes no sense for ptys but would inhibit the above
388 * l_modem(). CLOCAL makes sense but isn't supported. Special
389 * l_modem()s that ignore carrier drop make no sense for ptys but
390 * may be in use because other parts of the line discipline make
391 * sense for ptys. Recover by doing everything that a normal
392 * ttymodem() would have done except for sending a SIGHUP.
393 */
394 if (tp->t_state & TS_ISOPEN) {
395 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED);
396 tp->t_state |= TS_ZOMBIE;
397 ttyflush(tp, FREAD | FWRITE);
398 }
399
400 tp->t_oproc = 0; /* mark closed */
401 return (0);
402}
403
404static int
405ptcread(dev, uio, flag)
406 dev_t dev;
407 struct uio *uio;
408 int flag;
409{
|
410 register struct tty *tp = dev->si_tty_tty;
| 410 register struct tty *tp = dev->si_tty;
|
411 struct pt_ioctl *pti = dev->si_drv1;
412 char buf[BUFSIZ];
413 int error = 0, cc;
414
415 /*
416 * We want to block until the slave
417 * is open, and there's something to read;
418 * but if we lost the slave or we're NBIO,
419 * then return the appropriate error instead.
420 */
421 for (;;) {
422 if (tp->t_state&TS_ISOPEN) {
423 if (pti->pt_flags&PF_PKT && pti->pt_send) {
424 error = ureadc((int)pti->pt_send, uio);
425 if (error)
426 return (error);
427 if (pti->pt_send & TIOCPKT_IOCTL) {
428 cc = min(uio->uio_resid,
429 sizeof(tp->t_termios));
430 uiomove((caddr_t)&tp->t_termios, cc,
431 uio);
432 }
433 pti->pt_send = 0;
434 return (0);
435 }
436 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) {
437 error = ureadc((int)pti->pt_ucntl, uio);
438 if (error)
439 return (error);
440 pti->pt_ucntl = 0;
441 return (0);
442 }
443 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0)
444 break;
445 }
446 if ((tp->t_state & TS_CONNECTED) == 0)
447 return (0); /* EOF */
448 if (flag & IO_NDELAY)
449 return (EWOULDBLOCK);
450 error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0);
451 if (error)
452 return (error);
453 }
454 if (pti->pt_flags & (PF_PKT|PF_UCNTL))
455 error = ureadc(0, uio);
456 while (uio->uio_resid > 0 && error == 0) {
457 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ));
458 if (cc <= 0)
459 break;
460 error = uiomove(buf, cc, uio);
461 }
462 ttwwakeup(tp);
463 return (error);
464}
465
466static void
467ptsstop(tp, flush)
468 register struct tty *tp;
469 int flush;
470{
471 struct pt_ioctl *pti = tp->t_dev->si_drv1;
472 int flag;
473
474 /* note: FLUSHREAD and FLUSHWRITE already ok */
475 if (flush == 0) {
476 flush = TIOCPKT_STOP;
477 pti->pt_flags |= PF_STOPPED;
478 } else
479 pti->pt_flags &= ~PF_STOPPED;
480 pti->pt_send |= flush;
481 /* change of perspective */
482 flag = 0;
483 if (flush & FREAD)
484 flag |= FWRITE;
485 if (flush & FWRITE)
486 flag |= FREAD;
487 ptcwakeup(tp, flag);
488}
489
490static int
491ptcpoll(dev, events, p)
492 dev_t dev;
493 int events;
494 struct proc *p;
495{
| 411 struct pt_ioctl *pti = dev->si_drv1;
412 char buf[BUFSIZ];
413 int error = 0, cc;
414
415 /*
416 * We want to block until the slave
417 * is open, and there's something to read;
418 * but if we lost the slave or we're NBIO,
419 * then return the appropriate error instead.
420 */
421 for (;;) {
422 if (tp->t_state&TS_ISOPEN) {
423 if (pti->pt_flags&PF_PKT && pti->pt_send) {
424 error = ureadc((int)pti->pt_send, uio);
425 if (error)
426 return (error);
427 if (pti->pt_send & TIOCPKT_IOCTL) {
428 cc = min(uio->uio_resid,
429 sizeof(tp->t_termios));
430 uiomove((caddr_t)&tp->t_termios, cc,
431 uio);
432 }
433 pti->pt_send = 0;
434 return (0);
435 }
436 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) {
437 error = ureadc((int)pti->pt_ucntl, uio);
438 if (error)
439 return (error);
440 pti->pt_ucntl = 0;
441 return (0);
442 }
443 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0)
444 break;
445 }
446 if ((tp->t_state & TS_CONNECTED) == 0)
447 return (0); /* EOF */
448 if (flag & IO_NDELAY)
449 return (EWOULDBLOCK);
450 error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0);
451 if (error)
452 return (error);
453 }
454 if (pti->pt_flags & (PF_PKT|PF_UCNTL))
455 error = ureadc(0, uio);
456 while (uio->uio_resid > 0 && error == 0) {
457 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ));
458 if (cc <= 0)
459 break;
460 error = uiomove(buf, cc, uio);
461 }
462 ttwwakeup(tp);
463 return (error);
464}
465
466static void
467ptsstop(tp, flush)
468 register struct tty *tp;
469 int flush;
470{
471 struct pt_ioctl *pti = tp->t_dev->si_drv1;
472 int flag;
473
474 /* note: FLUSHREAD and FLUSHWRITE already ok */
475 if (flush == 0) {
476 flush = TIOCPKT_STOP;
477 pti->pt_flags |= PF_STOPPED;
478 } else
479 pti->pt_flags &= ~PF_STOPPED;
480 pti->pt_send |= flush;
481 /* change of perspective */
482 flag = 0;
483 if (flush & FREAD)
484 flag |= FWRITE;
485 if (flush & FWRITE)
486 flag |= FREAD;
487 ptcwakeup(tp, flag);
488}
489
490static int
491ptcpoll(dev, events, p)
492 dev_t dev;
493 int events;
494 struct proc *p;
495{
|
496 register struct tty *tp = dev->si_tty_tty;
| 496 register struct tty *tp = dev->si_tty;
|
497 struct pt_ioctl *pti = dev->si_drv1;
498 int revents = 0;
499 int s;
500
501 if ((tp->t_state & TS_CONNECTED) == 0)
502 return (seltrue(dev, events, p) | POLLHUP);
503
504 /*
505 * Need to block timeouts (ttrstart).
506 */
507 s = spltty();
508
509 if (events & (POLLIN | POLLRDNORM))
510 if ((tp->t_state & TS_ISOPEN) &&
511 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) ||
512 ((pti->pt_flags & PF_PKT) && pti->pt_send) ||
513 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl)))
514 revents |= events & (POLLIN | POLLRDNORM);
515
516 if (events & (POLLOUT | POLLWRNORM))
517 if (tp->t_state & TS_ISOPEN &&
518 ((pti->pt_flags & PF_REMOTE) ?
519 (tp->t_canq.c_cc == 0) :
520 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) ||
521 (tp->t_canq.c_cc == 0 && (tp->t_iflag & ICANON)))))
522 revents |= events & (POLLOUT | POLLWRNORM);
523
524 if (events & POLLHUP)
525 if ((tp->t_state & TS_CARR_ON) == 0)
526 revents |= POLLHUP;
527
528 if (revents == 0) {
529 if (events & (POLLIN | POLLRDNORM))
530 selrecord(p, &pti->pt_selr);
531
532 if (events & (POLLOUT | POLLWRNORM))
533 selrecord(p, &pti->pt_selw);
534 }
535 splx(s);
536
537 return (revents);
538}
539
540static int
541ptcwrite(dev, uio, flag)
542 dev_t dev;
543 register struct uio *uio;
544 int flag;
545{
| 497 struct pt_ioctl *pti = dev->si_drv1;
498 int revents = 0;
499 int s;
500
501 if ((tp->t_state & TS_CONNECTED) == 0)
502 return (seltrue(dev, events, p) | POLLHUP);
503
504 /*
505 * Need to block timeouts (ttrstart).
506 */
507 s = spltty();
508
509 if (events & (POLLIN | POLLRDNORM))
510 if ((tp->t_state & TS_ISOPEN) &&
511 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) ||
512 ((pti->pt_flags & PF_PKT) && pti->pt_send) ||
513 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl)))
514 revents |= events & (POLLIN | POLLRDNORM);
515
516 if (events & (POLLOUT | POLLWRNORM))
517 if (tp->t_state & TS_ISOPEN &&
518 ((pti->pt_flags & PF_REMOTE) ?
519 (tp->t_canq.c_cc == 0) :
520 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) ||
521 (tp->t_canq.c_cc == 0 && (tp->t_iflag & ICANON)))))
522 revents |= events & (POLLOUT | POLLWRNORM);
523
524 if (events & POLLHUP)
525 if ((tp->t_state & TS_CARR_ON) == 0)
526 revents |= POLLHUP;
527
528 if (revents == 0) {
529 if (events & (POLLIN | POLLRDNORM))
530 selrecord(p, &pti->pt_selr);
531
532 if (events & (POLLOUT | POLLWRNORM))
533 selrecord(p, &pti->pt_selw);
534 }
535 splx(s);
536
537 return (revents);
538}
539
540static int
541ptcwrite(dev, uio, flag)
542 dev_t dev;
543 register struct uio *uio;
544 int flag;
545{
|
546 register struct tty *tp = dev->si_tty_tty;
| 546 register struct tty *tp = dev->si_tty;
|
547 register u_char *cp = 0;
548 register int cc = 0;
549 u_char locbuf[BUFSIZ];
550 int cnt = 0;
551 struct pt_ioctl *pti = dev->si_drv1;
552 int error = 0;
553
554again:
555 if ((tp->t_state&TS_ISOPEN) == 0)
556 goto block;
557 if (pti->pt_flags & PF_REMOTE) {
558 if (tp->t_canq.c_cc)
559 goto block;
560 while ((uio->uio_resid > 0 || cc > 0) &&
561 tp->t_canq.c_cc < TTYHOG - 1) {
562 if (cc == 0) {
563 cc = min(uio->uio_resid, BUFSIZ);
564 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc);
565 cp = locbuf;
566 error = uiomove((caddr_t)cp, cc, uio);
567 if (error)
568 return (error);
569 /* check again for safety */
570 if ((tp->t_state & TS_ISOPEN) == 0) {
571 /* adjust as usual */
572 uio->uio_resid += cc;
573 return (EIO);
574 }
575 }
576 if (cc > 0) {
577 cc = b_to_q((char *)cp, cc, &tp->t_canq);
578 /*
579 * XXX we don't guarantee that the canq size
580 * is >= TTYHOG, so the above b_to_q() may
581 * leave some bytes uncopied. However, space
582 * is guaranteed for the null terminator if
583 * we don't fail here since (TTYHOG - 1) is
584 * not a multiple of CBSIZE.
585 */
586 if (cc > 0)
587 break;
588 }
589 }
590 /* adjust for data copied in but not written */
591 uio->uio_resid += cc;
592 (void) putc(0, &tp->t_canq);
593 ttwakeup(tp);
594 wakeup(TSA_PTS_READ(tp));
595 return (0);
596 }
597 while (uio->uio_resid > 0 || cc > 0) {
598 if (cc == 0) {
599 cc = min(uio->uio_resid, BUFSIZ);
600 cp = locbuf;
601 error = uiomove((caddr_t)cp, cc, uio);
602 if (error)
603 return (error);
604 /* check again for safety */
605 if ((tp->t_state & TS_ISOPEN) == 0) {
606 /* adjust for data copied in but not written */
607 uio->uio_resid += cc;
608 return (EIO);
609 }
610 }
611 while (cc > 0) {
612 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 &&
613 (tp->t_canq.c_cc > 0 || !(tp->t_iflag&ICANON))) {
614 wakeup(TSA_HUP_OR_INPUT(tp));
615 goto block;
616 }
617 (*linesw[tp->t_line].l_rint)(*cp++, tp);
618 cnt++;
619 cc--;
620 }
621 cc = 0;
622 }
623 return (0);
624block:
625 /*
626 * Come here to wait for slave to open, for space
627 * in outq, or space in rawq, or an empty canq.
628 */
629 if ((tp->t_state & TS_CONNECTED) == 0) {
630 /* adjust for data copied in but not written */
631 uio->uio_resid += cc;
632 return (EIO);
633 }
634 if (flag & IO_NDELAY) {
635 /* adjust for data copied in but not written */
636 uio->uio_resid += cc;
637 if (cnt == 0)
638 return (EWOULDBLOCK);
639 return (0);
640 }
641 error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0);
642 if (error) {
643 /* adjust for data copied in but not written */
644 uio->uio_resid += cc;
645 return (error);
646 }
647 goto again;
648}
649
650static struct tty *
651ptydevtotty(dev)
652 dev_t dev;
653{
654 if (minor(dev) & ~0xff)
655 return (NULL);
656
| 547 register u_char *cp = 0;
548 register int cc = 0;
549 u_char locbuf[BUFSIZ];
550 int cnt = 0;
551 struct pt_ioctl *pti = dev->si_drv1;
552 int error = 0;
553
554again:
555 if ((tp->t_state&TS_ISOPEN) == 0)
556 goto block;
557 if (pti->pt_flags & PF_REMOTE) {
558 if (tp->t_canq.c_cc)
559 goto block;
560 while ((uio->uio_resid > 0 || cc > 0) &&
561 tp->t_canq.c_cc < TTYHOG - 1) {
562 if (cc == 0) {
563 cc = min(uio->uio_resid, BUFSIZ);
564 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc);
565 cp = locbuf;
566 error = uiomove((caddr_t)cp, cc, uio);
567 if (error)
568 return (error);
569 /* check again for safety */
570 if ((tp->t_state & TS_ISOPEN) == 0) {
571 /* adjust as usual */
572 uio->uio_resid += cc;
573 return (EIO);
574 }
575 }
576 if (cc > 0) {
577 cc = b_to_q((char *)cp, cc, &tp->t_canq);
578 /*
579 * XXX we don't guarantee that the canq size
580 * is >= TTYHOG, so the above b_to_q() may
581 * leave some bytes uncopied. However, space
582 * is guaranteed for the null terminator if
583 * we don't fail here since (TTYHOG - 1) is
584 * not a multiple of CBSIZE.
585 */
586 if (cc > 0)
587 break;
588 }
589 }
590 /* adjust for data copied in but not written */
591 uio->uio_resid += cc;
592 (void) putc(0, &tp->t_canq);
593 ttwakeup(tp);
594 wakeup(TSA_PTS_READ(tp));
595 return (0);
596 }
597 while (uio->uio_resid > 0 || cc > 0) {
598 if (cc == 0) {
599 cc = min(uio->uio_resid, BUFSIZ);
600 cp = locbuf;
601 error = uiomove((caddr_t)cp, cc, uio);
602 if (error)
603 return (error);
604 /* check again for safety */
605 if ((tp->t_state & TS_ISOPEN) == 0) {
606 /* adjust for data copied in but not written */
607 uio->uio_resid += cc;
608 return (EIO);
609 }
610 }
611 while (cc > 0) {
612 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 &&
613 (tp->t_canq.c_cc > 0 || !(tp->t_iflag&ICANON))) {
614 wakeup(TSA_HUP_OR_INPUT(tp));
615 goto block;
616 }
617 (*linesw[tp->t_line].l_rint)(*cp++, tp);
618 cnt++;
619 cc--;
620 }
621 cc = 0;
622 }
623 return (0);
624block:
625 /*
626 * Come here to wait for slave to open, for space
627 * in outq, or space in rawq, or an empty canq.
628 */
629 if ((tp->t_state & TS_CONNECTED) == 0) {
630 /* adjust for data copied in but not written */
631 uio->uio_resid += cc;
632 return (EIO);
633 }
634 if (flag & IO_NDELAY) {
635 /* adjust for data copied in but not written */
636 uio->uio_resid += cc;
637 if (cnt == 0)
638 return (EWOULDBLOCK);
639 return (0);
640 }
641 error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0);
642 if (error) {
643 /* adjust for data copied in but not written */
644 uio->uio_resid += cc;
645 return (error);
646 }
647 goto again;
648}
649
650static struct tty *
651ptydevtotty(dev)
652 dev_t dev;
653{
654 if (minor(dev) & ~0xff)
655 return (NULL);
656
|
657 return dev->si_tty_tty;
| 657 return dev->si_tty;
|
658}
659
660/*ARGSUSED*/
661static int
662ptyioctl(dev, cmd, data, flag, p)
663 dev_t dev;
664 u_long cmd;
665 caddr_t data;
666 int flag;
667 struct proc *p;
668{
| 658}
659
660/*ARGSUSED*/
661static int
662ptyioctl(dev, cmd, data, flag, p)
663 dev_t dev;
664 u_long cmd;
665 caddr_t data;
666 int flag;
667 struct proc *p;
668{
|
669 register struct tty *tp = dev->si_tty_tty;
| 669 register struct tty *tp = dev->si_tty;
|
670 register struct pt_ioctl *pti = dev->si_drv1;
671 register u_char *cc = tp->t_cc;
672 int stop, error;
673
674 if (devsw(dev)->d_open == ptcopen) {
675 switch (cmd) {
676
677 case TIOCGPGRP:
678 /*
679 * We avoid calling ttioctl on the controller since,
680 * in that case, tp must be the controlling terminal.
681 */
682 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0;
683 return (0);
684
685 case TIOCPKT:
686 if (*(int *)data) {
687 if (pti->pt_flags & PF_UCNTL)
688 return (EINVAL);
689 pti->pt_flags |= PF_PKT;
690 } else
691 pti->pt_flags &= ~PF_PKT;
692 return (0);
693
694 case TIOCUCNTL:
695 if (*(int *)data) {
696 if (pti->pt_flags & PF_PKT)
697 return (EINVAL);
698 pti->pt_flags |= PF_UCNTL;
699 } else
700 pti->pt_flags &= ~PF_UCNTL;
701 return (0);
702
703 case TIOCREMOTE:
704 if (*(int *)data)
705 pti->pt_flags |= PF_REMOTE;
706 else
707 pti->pt_flags &= ~PF_REMOTE;
708 ttyflush(tp, FREAD|FWRITE);
709 return (0);
710 }
711
712 /*
713 * The rest of the ioctls shouldn't be called until
714 * the slave is open.
715 */
716 if ((tp->t_state & TS_ISOPEN) == 0)
717 return (EAGAIN);
718
719 switch (cmd) {
720#ifdef COMPAT_43
721 case TIOCSETP:
722 case TIOCSETN:
723#endif
724 case TIOCSETD:
725 case TIOCSETA:
726 case TIOCSETAW:
727 case TIOCSETAF:
728 /*
729 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG.
730 * ttywflush(tp) will hang if there are characters in
731 * the outq.
732 */
733 ndflush(&tp->t_outq, tp->t_outq.c_cc);
734 break;
735
736 case TIOCSIG:
737 if (*(unsigned int *)data >= NSIG ||
738 *(unsigned int *)data == 0)
739 return(EINVAL);
740 if ((tp->t_lflag&NOFLSH) == 0)
741 ttyflush(tp, FREAD|FWRITE);
742 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1);
743 if ((*(unsigned int *)data == SIGINFO) &&
744 ((tp->t_lflag&NOKERNINFO) == 0))
745 ttyinfo(tp);
746 return(0);
747 }
748 }
749 if (cmd == TIOCEXT) {
750 /*
751 * When the EXTPROC bit is being toggled, we need
752 * to send an TIOCPKT_IOCTL if the packet driver
753 * is turned on.
754 */
755 if (*(int *)data) {
756 if (pti->pt_flags & PF_PKT) {
757 pti->pt_send |= TIOCPKT_IOCTL;
758 ptcwakeup(tp, FREAD);
759 }
760 tp->t_lflag |= EXTPROC;
761 } else {
762 if ((tp->t_lflag & EXTPROC) &&
763 (pti->pt_flags & PF_PKT)) {
764 pti->pt_send |= TIOCPKT_IOCTL;
765 ptcwakeup(tp, FREAD);
766 }
767 tp->t_lflag &= ~EXTPROC;
768 }
769 return(0);
770 }
771 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
772 if (error == ENOIOCTL)
773 error = ttioctl(tp, cmd, data, flag);
774 if (error == ENOIOCTL) {
775 if (pti->pt_flags & PF_UCNTL &&
776 (cmd & ~0xff) == UIOCCMD(0)) {
777 if (cmd & 0xff) {
778 pti->pt_ucntl = (u_char)cmd;
779 ptcwakeup(tp, FREAD);
780 }
781 return (0);
782 }
783 error = ENOTTY;
784 }
785 /*
786 * If external processing and packet mode send ioctl packet.
787 */
788 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) {
789 switch(cmd) {
790 case TIOCSETA:
791 case TIOCSETAW:
792 case TIOCSETAF:
793#ifdef COMPAT_43
794 case TIOCSETP:
795 case TIOCSETN:
796#endif
797#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
798 case TIOCSETC:
799 case TIOCSLTC:
800 case TIOCLBIS:
801 case TIOCLBIC:
802 case TIOCLSET:
803#endif
804 pti->pt_send |= TIOCPKT_IOCTL;
805 ptcwakeup(tp, FREAD);
806 default:
807 break;
808 }
809 }
810 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s'))
811 && CCEQ(cc[VSTART], CTRL('q'));
812 if (pti->pt_flags & PF_NOSTOP) {
813 if (stop) {
814 pti->pt_send &= ~TIOCPKT_NOSTOP;
815 pti->pt_send |= TIOCPKT_DOSTOP;
816 pti->pt_flags &= ~PF_NOSTOP;
817 ptcwakeup(tp, FREAD);
818 }
819 } else {
820 if (!stop) {
821 pti->pt_send &= ~TIOCPKT_DOSTOP;
822 pti->pt_send |= TIOCPKT_NOSTOP;
823 pti->pt_flags |= PF_NOSTOP;
824 ptcwakeup(tp, FREAD);
825 }
826 }
827 return (error);
828}
829
830
831static void ptc_drvinit __P((void *unused));
832
833static void
834ptc_drvinit(unused)
835 void *unused;
836{
837 cdevsw_add(&pts_cdevsw);
838 cdevsw_add(&ptc_cdevsw);
839 /* XXX: Gross hack for DEVFS */
840 ptyinit(0);
841}
842
843SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL)
| 670 register struct pt_ioctl *pti = dev->si_drv1;
671 register u_char *cc = tp->t_cc;
672 int stop, error;
673
674 if (devsw(dev)->d_open == ptcopen) {
675 switch (cmd) {
676
677 case TIOCGPGRP:
678 /*
679 * We avoid calling ttioctl on the controller since,
680 * in that case, tp must be the controlling terminal.
681 */
682 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0;
683 return (0);
684
685 case TIOCPKT:
686 if (*(int *)data) {
687 if (pti->pt_flags & PF_UCNTL)
688 return (EINVAL);
689 pti->pt_flags |= PF_PKT;
690 } else
691 pti->pt_flags &= ~PF_PKT;
692 return (0);
693
694 case TIOCUCNTL:
695 if (*(int *)data) {
696 if (pti->pt_flags & PF_PKT)
697 return (EINVAL);
698 pti->pt_flags |= PF_UCNTL;
699 } else
700 pti->pt_flags &= ~PF_UCNTL;
701 return (0);
702
703 case TIOCREMOTE:
704 if (*(int *)data)
705 pti->pt_flags |= PF_REMOTE;
706 else
707 pti->pt_flags &= ~PF_REMOTE;
708 ttyflush(tp, FREAD|FWRITE);
709 return (0);
710 }
711
712 /*
713 * The rest of the ioctls shouldn't be called until
714 * the slave is open.
715 */
716 if ((tp->t_state & TS_ISOPEN) == 0)
717 return (EAGAIN);
718
719 switch (cmd) {
720#ifdef COMPAT_43
721 case TIOCSETP:
722 case TIOCSETN:
723#endif
724 case TIOCSETD:
725 case TIOCSETA:
726 case TIOCSETAW:
727 case TIOCSETAF:
728 /*
729 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG.
730 * ttywflush(tp) will hang if there are characters in
731 * the outq.
732 */
733 ndflush(&tp->t_outq, tp->t_outq.c_cc);
734 break;
735
736 case TIOCSIG:
737 if (*(unsigned int *)data >= NSIG ||
738 *(unsigned int *)data == 0)
739 return(EINVAL);
740 if ((tp->t_lflag&NOFLSH) == 0)
741 ttyflush(tp, FREAD|FWRITE);
742 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1);
743 if ((*(unsigned int *)data == SIGINFO) &&
744 ((tp->t_lflag&NOKERNINFO) == 0))
745 ttyinfo(tp);
746 return(0);
747 }
748 }
749 if (cmd == TIOCEXT) {
750 /*
751 * When the EXTPROC bit is being toggled, we need
752 * to send an TIOCPKT_IOCTL if the packet driver
753 * is turned on.
754 */
755 if (*(int *)data) {
756 if (pti->pt_flags & PF_PKT) {
757 pti->pt_send |= TIOCPKT_IOCTL;
758 ptcwakeup(tp, FREAD);
759 }
760 tp->t_lflag |= EXTPROC;
761 } else {
762 if ((tp->t_lflag & EXTPROC) &&
763 (pti->pt_flags & PF_PKT)) {
764 pti->pt_send |= TIOCPKT_IOCTL;
765 ptcwakeup(tp, FREAD);
766 }
767 tp->t_lflag &= ~EXTPROC;
768 }
769 return(0);
770 }
771 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
772 if (error == ENOIOCTL)
773 error = ttioctl(tp, cmd, data, flag);
774 if (error == ENOIOCTL) {
775 if (pti->pt_flags & PF_UCNTL &&
776 (cmd & ~0xff) == UIOCCMD(0)) {
777 if (cmd & 0xff) {
778 pti->pt_ucntl = (u_char)cmd;
779 ptcwakeup(tp, FREAD);
780 }
781 return (0);
782 }
783 error = ENOTTY;
784 }
785 /*
786 * If external processing and packet mode send ioctl packet.
787 */
788 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) {
789 switch(cmd) {
790 case TIOCSETA:
791 case TIOCSETAW:
792 case TIOCSETAF:
793#ifdef COMPAT_43
794 case TIOCSETP:
795 case TIOCSETN:
796#endif
797#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
798 case TIOCSETC:
799 case TIOCSLTC:
800 case TIOCLBIS:
801 case TIOCLBIC:
802 case TIOCLSET:
803#endif
804 pti->pt_send |= TIOCPKT_IOCTL;
805 ptcwakeup(tp, FREAD);
806 default:
807 break;
808 }
809 }
810 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s'))
811 && CCEQ(cc[VSTART], CTRL('q'));
812 if (pti->pt_flags & PF_NOSTOP) {
813 if (stop) {
814 pti->pt_send &= ~TIOCPKT_NOSTOP;
815 pti->pt_send |= TIOCPKT_DOSTOP;
816 pti->pt_flags &= ~PF_NOSTOP;
817 ptcwakeup(tp, FREAD);
818 }
819 } else {
820 if (!stop) {
821 pti->pt_send &= ~TIOCPKT_DOSTOP;
822 pti->pt_send |= TIOCPKT_NOSTOP;
823 pti->pt_flags |= PF_NOSTOP;
824 ptcwakeup(tp, FREAD);
825 }
826 }
827 return (error);
828}
829
830
831static void ptc_drvinit __P((void *unused));
832
833static void
834ptc_drvinit(unused)
835 void *unused;
836{
837 cdevsw_add(&pts_cdevsw);
838 cdevsw_add(&ptc_cdevsw);
839 /* XXX: Gross hack for DEVFS */
840 ptyinit(0);
841}
842
843SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL)
|