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 90831 2002-02-18 06:07:11Z dillon $
| 34 * $FreeBSD: head/sys/kern/tty_pty.c 91140 2002-02-23 11:12:57Z tanimura $
|
35 */ 36 37/* 38 * Pseudo-teletype Driver 39 * (Actually two drivers, requiring two entries in 'cdevsw') 40 */ 41#include "opt_compat.h" 42#include <sys/param.h> 43#include <sys/systm.h>
| 35 */ 36 37/* 38 * Pseudo-teletype Driver 39 * (Actually two drivers, requiring two entries in 'cdevsw') 40 */ 41#include "opt_compat.h" 42#include <sys/param.h> 43#include <sys/systm.h>
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| 44#include <sys/lock.h> 45#include <sys/mutex.h> 46#include <sys/sx.h>
|
44#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 45#include <sys/ioctl_compat.h> 46#endif 47#include <sys/proc.h> 48#include <sys/tty.h> 49#include <sys/conf.h> 50#include <sys/fcntl.h> 51#include <sys/poll.h> 52#include <sys/kernel.h> 53#include <sys/vnode.h> 54#include <sys/signalvar.h> 55#include <sys/malloc.h> 56 57static MALLOC_DEFINE(M_PTY, "ptys", "pty data structures"); 58 59static void ptsstart __P((struct tty *tp)); 60static void ptsstop __P((struct tty *tp, int rw)); 61static void ptcwakeup __P((struct tty *tp, int flag)); 62static dev_t ptyinit __P((dev_t cdev)); 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_open_t ptcopen; 70static d_close_t ptcclose; 71static d_read_t ptcread; 72static d_write_t ptcwrite; 73static d_poll_t ptcpoll; 74 75#define CDEV_MAJOR_S 5 76static struct cdevsw pts_cdevsw = { 77 /* open */ ptsopen, 78 /* close */ ptsclose, 79 /* read */ ptsread, 80 /* write */ ptswrite, 81 /* ioctl */ ptyioctl, 82 /* poll */ ttypoll, 83 /* mmap */ nommap, 84 /* strategy */ nostrategy, 85 /* name */ "pts", 86 /* maj */ CDEV_MAJOR_S, 87 /* dump */ nodump, 88 /* psize */ nopsize, 89 /* flags */ D_TTY | D_KQFILTER, 90 /* kqfilter */ ttykqfilter, 91}; 92 93#define CDEV_MAJOR_C 6 94static struct cdevsw ptc_cdevsw = { 95 /* open */ ptcopen, 96 /* close */ ptcclose, 97 /* read */ ptcread, 98 /* write */ ptcwrite, 99 /* ioctl */ ptyioctl, 100 /* poll */ ptcpoll, 101 /* mmap */ nommap, 102 /* strategy */ nostrategy, 103 /* name */ "ptc", 104 /* maj */ CDEV_MAJOR_C, 105 /* dump */ nodump, 106 /* psize */ nopsize, 107 /* flags */ D_TTY | D_KQFILTER, 108 /* kqfilter */ ttykqfilter, 109}; 110 111#define BUFSIZ 100 /* Chunk size iomoved to/from user */ 112 113struct pt_ioctl { 114 int pt_flags; 115 struct selinfo pt_selr, pt_selw; 116 u_char pt_send; 117 u_char pt_ucntl; 118 struct tty pt_tty; 119 dev_t devs, devc; 120 struct prison *pt_prison; 121}; 122 123#define PF_PKT 0x08 /* packet mode */ 124#define PF_STOPPED 0x10 /* user told stopped */ 125#define PF_REMOTE 0x20 /* remote and flow controlled input */ 126#define PF_NOSTOP 0x40 127#define PF_UCNTL 0x80 /* user control mode */ 128 129static char *names = "pqrsPQRS"; 130/* 131 * This function creates and initializes a pts/ptc pair 132 * 133 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 134 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 135 * 136 * XXX: define and add mapping of upper minor bits to allow more 137 * than 256 ptys. 138 */ 139static dev_t 140ptyinit(dev_t devc) 141{ 142 dev_t devs; 143 struct pt_ioctl *pt; 144 int n; 145 146 n = minor(devc); 147 /* For now we only map the lower 8 bits of the minor */ 148 if (n & ~0xff) 149 return (NODEV); 150 151 devc->si_flags &= ~SI_CHEAPCLONE; 152 153 pt = malloc(sizeof(*pt), M_PTY, M_WAITOK | M_ZERO); 154 pt->devs = devs = make_dev(&pts_cdevsw, n, 155 UID_ROOT, GID_WHEEL, 0666, "tty%c%r", names[n / 32], n % 32); 156 pt->devc = devc; 157 158 devs->si_drv1 = devc->si_drv1 = pt; 159 devs->si_tty = devc->si_tty = &pt->pt_tty; 160 pt->pt_tty.t_dev = devs; 161 ttyregister(&pt->pt_tty); 162 return (devc); 163} 164 165/*ARGSUSED*/ 166static int 167ptsopen(dev, flag, devtype, td) 168 dev_t dev; 169 int flag, devtype; 170 struct thread *td; 171{ 172 struct proc *p = td->td_proc; 173 register struct tty *tp; 174 int error; 175 struct pt_ioctl *pti; 176 177 if (!dev->si_drv1) 178 return(ENXIO); 179 pti = dev->si_drv1; 180 tp = dev->si_tty; 181 if ((tp->t_state & TS_ISOPEN) == 0) { 182 ttychars(tp); /* Set up default chars */ 183 tp->t_iflag = TTYDEF_IFLAG; 184 tp->t_oflag = TTYDEF_OFLAG; 185 tp->t_lflag = TTYDEF_LFLAG; 186 tp->t_cflag = TTYDEF_CFLAG; 187 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 188 } else if (tp->t_state & TS_XCLUDE && suser_xxx(p->p_ucred, NULL, 0)) { 189 return (EBUSY); 190 } else if (pti->pt_prison != p->p_ucred->cr_prison) { 191 return (EBUSY); 192 } 193 if (tp->t_oproc) /* Ctrlr still around. */ 194 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 195 while ((tp->t_state & TS_CARR_ON) == 0) { 196 if (flag&FNONBLOCK) 197 break; 198 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, 199 "ptsopn", 0); 200 if (error) 201 return (error); 202 } 203 error = (*linesw[tp->t_line].l_open)(dev, tp); 204 if (error == 0) 205 ptcwakeup(tp, FREAD|FWRITE); 206 return (error); 207} 208 209static int 210ptsclose(dev, flag, mode, td) 211 dev_t dev; 212 int flag, mode; 213 struct thread *td; 214{ 215 register struct tty *tp; 216 int err; 217 218 tp = dev->si_tty; 219 err = (*linesw[tp->t_line].l_close)(tp, flag); 220 ptsstop(tp, FREAD|FWRITE); 221 (void) ttyclose(tp); 222 return (err); 223} 224 225static int 226ptsread(dev, uio, flag) 227 dev_t dev; 228 struct uio *uio; 229 int flag; 230{ 231 struct thread *td = curthread; 232 struct proc *p = td->td_proc; 233 register struct tty *tp = dev->si_tty; 234 register struct pt_ioctl *pti = dev->si_drv1; 235 int error = 0; 236 237again: 238 if (pti->pt_flags & PF_REMOTE) { 239 while (isbackground(p, tp)) {
| 47#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 48#include <sys/ioctl_compat.h> 49#endif 50#include <sys/proc.h> 51#include <sys/tty.h> 52#include <sys/conf.h> 53#include <sys/fcntl.h> 54#include <sys/poll.h> 55#include <sys/kernel.h> 56#include <sys/vnode.h> 57#include <sys/signalvar.h> 58#include <sys/malloc.h> 59 60static MALLOC_DEFINE(M_PTY, "ptys", "pty data structures"); 61 62static void ptsstart __P((struct tty *tp)); 63static void ptsstop __P((struct tty *tp, int rw)); 64static void ptcwakeup __P((struct tty *tp, int flag)); 65static dev_t ptyinit __P((dev_t cdev)); 66 67static d_open_t ptsopen; 68static d_close_t ptsclose; 69static d_read_t ptsread; 70static d_write_t ptswrite; 71static d_ioctl_t ptyioctl; 72static d_open_t ptcopen; 73static d_close_t ptcclose; 74static d_read_t ptcread; 75static d_write_t ptcwrite; 76static d_poll_t ptcpoll; 77 78#define CDEV_MAJOR_S 5 79static struct cdevsw pts_cdevsw = { 80 /* open */ ptsopen, 81 /* close */ ptsclose, 82 /* read */ ptsread, 83 /* write */ ptswrite, 84 /* ioctl */ ptyioctl, 85 /* poll */ ttypoll, 86 /* mmap */ nommap, 87 /* strategy */ nostrategy, 88 /* name */ "pts", 89 /* maj */ CDEV_MAJOR_S, 90 /* dump */ nodump, 91 /* psize */ nopsize, 92 /* flags */ D_TTY | D_KQFILTER, 93 /* kqfilter */ ttykqfilter, 94}; 95 96#define CDEV_MAJOR_C 6 97static struct cdevsw ptc_cdevsw = { 98 /* open */ ptcopen, 99 /* close */ ptcclose, 100 /* read */ ptcread, 101 /* write */ ptcwrite, 102 /* ioctl */ ptyioctl, 103 /* poll */ ptcpoll, 104 /* mmap */ nommap, 105 /* strategy */ nostrategy, 106 /* name */ "ptc", 107 /* maj */ CDEV_MAJOR_C, 108 /* dump */ nodump, 109 /* psize */ nopsize, 110 /* flags */ D_TTY | D_KQFILTER, 111 /* kqfilter */ ttykqfilter, 112}; 113 114#define BUFSIZ 100 /* Chunk size iomoved to/from user */ 115 116struct pt_ioctl { 117 int pt_flags; 118 struct selinfo pt_selr, pt_selw; 119 u_char pt_send; 120 u_char pt_ucntl; 121 struct tty pt_tty; 122 dev_t devs, devc; 123 struct prison *pt_prison; 124}; 125 126#define PF_PKT 0x08 /* packet mode */ 127#define PF_STOPPED 0x10 /* user told stopped */ 128#define PF_REMOTE 0x20 /* remote and flow controlled input */ 129#define PF_NOSTOP 0x40 130#define PF_UCNTL 0x80 /* user control mode */ 131 132static char *names = "pqrsPQRS"; 133/* 134 * This function creates and initializes a pts/ptc pair 135 * 136 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 137 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 138 * 139 * XXX: define and add mapping of upper minor bits to allow more 140 * than 256 ptys. 141 */ 142static dev_t 143ptyinit(dev_t devc) 144{ 145 dev_t devs; 146 struct pt_ioctl *pt; 147 int n; 148 149 n = minor(devc); 150 /* For now we only map the lower 8 bits of the minor */ 151 if (n & ~0xff) 152 return (NODEV); 153 154 devc->si_flags &= ~SI_CHEAPCLONE; 155 156 pt = malloc(sizeof(*pt), M_PTY, M_WAITOK | M_ZERO); 157 pt->devs = devs = make_dev(&pts_cdevsw, n, 158 UID_ROOT, GID_WHEEL, 0666, "tty%c%r", names[n / 32], n % 32); 159 pt->devc = devc; 160 161 devs->si_drv1 = devc->si_drv1 = pt; 162 devs->si_tty = devc->si_tty = &pt->pt_tty; 163 pt->pt_tty.t_dev = devs; 164 ttyregister(&pt->pt_tty); 165 return (devc); 166} 167 168/*ARGSUSED*/ 169static int 170ptsopen(dev, flag, devtype, td) 171 dev_t dev; 172 int flag, devtype; 173 struct thread *td; 174{ 175 struct proc *p = td->td_proc; 176 register struct tty *tp; 177 int error; 178 struct pt_ioctl *pti; 179 180 if (!dev->si_drv1) 181 return(ENXIO); 182 pti = dev->si_drv1; 183 tp = dev->si_tty; 184 if ((tp->t_state & TS_ISOPEN) == 0) { 185 ttychars(tp); /* Set up default chars */ 186 tp->t_iflag = TTYDEF_IFLAG; 187 tp->t_oflag = TTYDEF_OFLAG; 188 tp->t_lflag = TTYDEF_LFLAG; 189 tp->t_cflag = TTYDEF_CFLAG; 190 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 191 } else if (tp->t_state & TS_XCLUDE && suser_xxx(p->p_ucred, NULL, 0)) { 192 return (EBUSY); 193 } else if (pti->pt_prison != p->p_ucred->cr_prison) { 194 return (EBUSY); 195 } 196 if (tp->t_oproc) /* Ctrlr still around. */ 197 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 198 while ((tp->t_state & TS_CARR_ON) == 0) { 199 if (flag&FNONBLOCK) 200 break; 201 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, 202 "ptsopn", 0); 203 if (error) 204 return (error); 205 } 206 error = (*linesw[tp->t_line].l_open)(dev, tp); 207 if (error == 0) 208 ptcwakeup(tp, FREAD|FWRITE); 209 return (error); 210} 211 212static int 213ptsclose(dev, flag, mode, td) 214 dev_t dev; 215 int flag, mode; 216 struct thread *td; 217{ 218 register struct tty *tp; 219 int err; 220 221 tp = dev->si_tty; 222 err = (*linesw[tp->t_line].l_close)(tp, flag); 223 ptsstop(tp, FREAD|FWRITE); 224 (void) ttyclose(tp); 225 return (err); 226} 227 228static int 229ptsread(dev, uio, flag) 230 dev_t dev; 231 struct uio *uio; 232 int flag; 233{ 234 struct thread *td = curthread; 235 struct proc *p = td->td_proc; 236 register struct tty *tp = dev->si_tty; 237 register struct pt_ioctl *pti = dev->si_drv1; 238 int error = 0; 239 240again: 241 if (pti->pt_flags & PF_REMOTE) { 242 while (isbackground(p, tp)) {
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| 243 PGRPSESS_SLOCK(); 244 PROC_LOCK(p);
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240 if (SIGISMEMBER(p->p_sigignore, SIGTTIN) || 241 SIGISMEMBER(p->p_sigmask, SIGTTIN) ||
| 245 if (SIGISMEMBER(p->p_sigignore, SIGTTIN) || 246 SIGISMEMBER(p->p_sigmask, SIGTTIN) ||
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242 p->p_pgrp->pg_jobc == 0 || p->p_flag & P_PPWAIT)
| 247 p->p_pgrp->pg_jobc == 0 || p->p_flag & P_PPWAIT) { 248 PROC_UNLOCK(p);
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243 return (EIO);
| 249 return (EIO);
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| 250 } 251 PROC_UNLOCK(p); 252 PGRP_LOCK(p->p_pgrp); 253 PGRPSESS_SUNLOCK();
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244 pgsignal(p->p_pgrp, SIGTTIN, 1);
| 254 pgsignal(p->p_pgrp, SIGTTIN, 1);
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| 255 PGRP_UNLOCK(p->p_pgrp);
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245 error = ttysleep(tp, &lbolt, TTIPRI | PCATCH, "ptsbg", 246 0); 247 if (error) 248 return (error); 249 } 250 if (tp->t_canq.c_cc == 0) { 251 if (flag & IO_NDELAY) 252 return (EWOULDBLOCK); 253 error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH, 254 "ptsin", 0); 255 if (error) 256 return (error); 257 goto again; 258 } 259 while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) 260 if (ureadc(getc(&tp->t_canq), uio) < 0) { 261 error = EFAULT; 262 break; 263 } 264 if (tp->t_canq.c_cc == 1) 265 (void) getc(&tp->t_canq); 266 if (tp->t_canq.c_cc) 267 return (error); 268 } else 269 if (tp->t_oproc) 270 error = (*linesw[tp->t_line].l_read)(tp, uio, flag); 271 ptcwakeup(tp, FWRITE); 272 return (error); 273} 274 275/* 276 * Write to pseudo-tty. 277 * Wakeups of controlling tty will happen 278 * indirectly, when tty driver calls ptsstart. 279 */ 280static int 281ptswrite(dev, uio, flag) 282 dev_t dev; 283 struct uio *uio; 284 int flag; 285{ 286 register struct tty *tp; 287 288 tp = dev->si_tty; 289 if (tp->t_oproc == 0) 290 return (EIO); 291 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 292} 293 294/* 295 * Start output on pseudo-tty. 296 * Wake up process selecting or sleeping for input from controlling tty. 297 */ 298static void 299ptsstart(tp) 300 struct tty *tp; 301{ 302 register struct pt_ioctl *pti = tp->t_dev->si_drv1; 303 304 if (tp->t_state & TS_TTSTOP) 305 return; 306 if (pti->pt_flags & PF_STOPPED) { 307 pti->pt_flags &= ~PF_STOPPED; 308 pti->pt_send = TIOCPKT_START; 309 } 310 ptcwakeup(tp, FREAD); 311} 312 313static void 314ptcwakeup(tp, flag) 315 struct tty *tp; 316 int flag; 317{ 318 struct pt_ioctl *pti = tp->t_dev->si_drv1; 319 320 if (flag & FREAD) { 321 selwakeup(&pti->pt_selr); 322 wakeup(TSA_PTC_READ(tp)); 323 } 324 if (flag & FWRITE) { 325 selwakeup(&pti->pt_selw); 326 wakeup(TSA_PTC_WRITE(tp)); 327 } 328} 329 330static int 331ptcopen(dev, flag, devtype, td) 332 dev_t dev; 333 int flag, devtype; 334 struct thread *td; 335{ 336 struct proc *p = td->td_proc; 337 register struct tty *tp; 338 struct pt_ioctl *pti; 339 340 if (!dev->si_drv1) 341 ptyinit(dev); 342 if (!dev->si_drv1) 343 return(ENXIO); 344 tp = dev->si_tty; 345 if (tp->t_oproc) 346 return (EIO); 347 tp->t_timeout = -1; 348 tp->t_oproc = ptsstart; 349 tp->t_stop = ptsstop; 350 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 351 tp->t_lflag &= ~EXTPROC; 352 pti = dev->si_drv1; 353 pti->pt_prison = p->p_ucred->cr_prison; 354 pti->pt_flags = 0; 355 pti->pt_send = 0; 356 pti->pt_ucntl = 0; 357 return (0); 358} 359 360static int 361ptcclose(dev, flags, fmt, td) 362 dev_t dev; 363 int flags; 364 int fmt; 365 struct thread *td; 366{ 367 register struct tty *tp; 368 369 tp = dev->si_tty; 370 (void)(*linesw[tp->t_line].l_modem)(tp, 0); 371 372 /* 373 * XXX MDMBUF makes no sense for ptys but would inhibit the above 374 * l_modem(). CLOCAL makes sense but isn't supported. Special 375 * l_modem()s that ignore carrier drop make no sense for ptys but 376 * may be in use because other parts of the line discipline make 377 * sense for ptys. Recover by doing everything that a normal 378 * ttymodem() would have done except for sending a SIGHUP. 379 */ 380 if (tp->t_state & TS_ISOPEN) { 381 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 382 tp->t_state |= TS_ZOMBIE; 383 ttyflush(tp, FREAD | FWRITE); 384 } 385 386 tp->t_oproc = 0; /* mark closed */ 387 return (0); 388} 389 390static int 391ptcread(dev, uio, flag) 392 dev_t dev; 393 struct uio *uio; 394 int flag; 395{ 396 register struct tty *tp = dev->si_tty; 397 struct pt_ioctl *pti = dev->si_drv1; 398 char buf[BUFSIZ]; 399 int error = 0, cc; 400 401 /* 402 * We want to block until the slave 403 * is open, and there's something to read; 404 * but if we lost the slave or we're NBIO, 405 * then return the appropriate error instead. 406 */ 407 for (;;) { 408 if (tp->t_state&TS_ISOPEN) { 409 if (pti->pt_flags&PF_PKT && pti->pt_send) { 410 error = ureadc((int)pti->pt_send, uio); 411 if (error) 412 return (error); 413 if (pti->pt_send & TIOCPKT_IOCTL) { 414 cc = min(uio->uio_resid, 415 sizeof(tp->t_termios)); 416 uiomove((caddr_t)&tp->t_termios, cc, 417 uio); 418 } 419 pti->pt_send = 0; 420 return (0); 421 } 422 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 423 error = ureadc((int)pti->pt_ucntl, uio); 424 if (error) 425 return (error); 426 pti->pt_ucntl = 0; 427 return (0); 428 } 429 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 430 break; 431 } 432 if ((tp->t_state & TS_CONNECTED) == 0) 433 return (0); /* EOF */ 434 if (flag & IO_NDELAY) 435 return (EWOULDBLOCK); 436 error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0); 437 if (error) 438 return (error); 439 } 440 if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 441 error = ureadc(0, uio); 442 while (uio->uio_resid > 0 && error == 0) { 443 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ)); 444 if (cc <= 0) 445 break; 446 error = uiomove(buf, cc, uio); 447 } 448 ttwwakeup(tp); 449 return (error); 450} 451 452static void 453ptsstop(tp, flush) 454 register struct tty *tp; 455 int flush; 456{ 457 struct pt_ioctl *pti = tp->t_dev->si_drv1; 458 int flag; 459 460 /* note: FLUSHREAD and FLUSHWRITE already ok */ 461 if (flush == 0) { 462 flush = TIOCPKT_STOP; 463 pti->pt_flags |= PF_STOPPED; 464 } else 465 pti->pt_flags &= ~PF_STOPPED; 466 pti->pt_send |= flush; 467 /* change of perspective */ 468 flag = 0; 469 if (flush & FREAD) 470 flag |= FWRITE; 471 if (flush & FWRITE) 472 flag |= FREAD; 473 ptcwakeup(tp, flag); 474} 475 476static int 477ptcpoll(dev, events, td) 478 dev_t dev; 479 int events; 480 struct thread *td; 481{ 482 register struct tty *tp = dev->si_tty; 483 struct pt_ioctl *pti = dev->si_drv1; 484 int revents = 0; 485 int s; 486 487 if ((tp->t_state & TS_CONNECTED) == 0) 488 return (seltrue(dev, events, td) | POLLHUP); 489 490 /* 491 * Need to block timeouts (ttrstart). 492 */ 493 s = spltty(); 494 495 if (events & (POLLIN | POLLRDNORM)) 496 if ((tp->t_state & TS_ISOPEN) && 497 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) || 498 ((pti->pt_flags & PF_PKT) && pti->pt_send) || 499 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl))) 500 revents |= events & (POLLIN | POLLRDNORM); 501 502 if (events & (POLLOUT | POLLWRNORM)) 503 if (tp->t_state & TS_ISOPEN && 504 ((pti->pt_flags & PF_REMOTE) ? 505 (tp->t_canq.c_cc == 0) : 506 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) || 507 (tp->t_canq.c_cc == 0 && (tp->t_lflag & ICANON))))) 508 revents |= events & (POLLOUT | POLLWRNORM); 509 510 if (events & POLLHUP) 511 if ((tp->t_state & TS_CARR_ON) == 0) 512 revents |= POLLHUP; 513 514 if (revents == 0) { 515 if (events & (POLLIN | POLLRDNORM)) 516 selrecord(td, &pti->pt_selr); 517 518 if (events & (POLLOUT | POLLWRNORM)) 519 selrecord(td, &pti->pt_selw); 520 } 521 splx(s); 522 523 return (revents); 524} 525 526static int 527ptcwrite(dev, uio, flag) 528 dev_t dev; 529 register struct uio *uio; 530 int flag; 531{ 532 register struct tty *tp = dev->si_tty; 533 register u_char *cp = 0; 534 register int cc = 0; 535 u_char locbuf[BUFSIZ]; 536 int cnt = 0; 537 struct pt_ioctl *pti = dev->si_drv1; 538 int error = 0; 539 540again: 541 if ((tp->t_state&TS_ISOPEN) == 0) 542 goto block; 543 if (pti->pt_flags & PF_REMOTE) { 544 if (tp->t_canq.c_cc) 545 goto block; 546 while ((uio->uio_resid > 0 || cc > 0) && 547 tp->t_canq.c_cc < TTYHOG - 1) { 548 if (cc == 0) { 549 cc = min(uio->uio_resid, BUFSIZ); 550 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 551 cp = locbuf; 552 error = uiomove((caddr_t)cp, cc, uio); 553 if (error) 554 return (error); 555 /* check again for safety */ 556 if ((tp->t_state & TS_ISOPEN) == 0) { 557 /* adjust as usual */ 558 uio->uio_resid += cc; 559 return (EIO); 560 } 561 } 562 if (cc > 0) { 563 cc = b_to_q((char *)cp, cc, &tp->t_canq); 564 /* 565 * XXX we don't guarantee that the canq size 566 * is >= TTYHOG, so the above b_to_q() may 567 * leave some bytes uncopied. However, space 568 * is guaranteed for the null terminator if 569 * we don't fail here since (TTYHOG - 1) is 570 * not a multiple of CBSIZE. 571 */ 572 if (cc > 0) 573 break; 574 } 575 } 576 /* adjust for data copied in but not written */ 577 uio->uio_resid += cc; 578 (void) putc(0, &tp->t_canq); 579 ttwakeup(tp); 580 wakeup(TSA_PTS_READ(tp)); 581 return (0); 582 } 583 while (uio->uio_resid > 0 || cc > 0) { 584 if (cc == 0) { 585 cc = min(uio->uio_resid, BUFSIZ); 586 cp = locbuf; 587 error = uiomove((caddr_t)cp, cc, uio); 588 if (error) 589 return (error); 590 /* check again for safety */ 591 if ((tp->t_state & TS_ISOPEN) == 0) { 592 /* adjust for data copied in but not written */ 593 uio->uio_resid += cc; 594 return (EIO); 595 } 596 } 597 while (cc > 0) { 598 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 599 (tp->t_canq.c_cc > 0 || !(tp->t_lflag&ICANON))) { 600 wakeup(TSA_HUP_OR_INPUT(tp)); 601 goto block; 602 } 603 (*linesw[tp->t_line].l_rint)(*cp++, tp); 604 cnt++; 605 cc--; 606 } 607 cc = 0; 608 } 609 return (0); 610block: 611 /* 612 * Come here to wait for slave to open, for space 613 * in outq, or space in rawq, or an empty canq. 614 */ 615 if ((tp->t_state & TS_CONNECTED) == 0) { 616 /* adjust for data copied in but not written */ 617 uio->uio_resid += cc; 618 return (EIO); 619 } 620 if (flag & IO_NDELAY) { 621 /* adjust for data copied in but not written */ 622 uio->uio_resid += cc; 623 if (cnt == 0) 624 return (EWOULDBLOCK); 625 return (0); 626 } 627 error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0); 628 if (error) { 629 /* adjust for data copied in but not written */ 630 uio->uio_resid += cc; 631 return (error); 632 } 633 goto again; 634} 635 636/*ARGSUSED*/ 637static int 638ptyioctl(dev, cmd, data, flag, td) 639 dev_t dev; 640 u_long cmd; 641 caddr_t data; 642 int flag; 643 struct thread *td; 644{ 645 register struct tty *tp = dev->si_tty; 646 register struct pt_ioctl *pti = dev->si_drv1; 647 register u_char *cc = tp->t_cc; 648 int stop, error; 649 650 if (devsw(dev)->d_open == ptcopen) { 651 switch (cmd) { 652 653 case TIOCGPGRP: 654 /* 655 * We avoid calling ttioctl on the controller since, 656 * in that case, tp must be the controlling terminal. 657 */ 658 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 659 return (0); 660 661 case TIOCPKT: 662 if (*(int *)data) { 663 if (pti->pt_flags & PF_UCNTL) 664 return (EINVAL); 665 pti->pt_flags |= PF_PKT; 666 } else 667 pti->pt_flags &= ~PF_PKT; 668 return (0); 669 670 case TIOCUCNTL: 671 if (*(int *)data) { 672 if (pti->pt_flags & PF_PKT) 673 return (EINVAL); 674 pti->pt_flags |= PF_UCNTL; 675 } else 676 pti->pt_flags &= ~PF_UCNTL; 677 return (0); 678 679 case TIOCREMOTE: 680 if (*(int *)data) 681 pti->pt_flags |= PF_REMOTE; 682 else 683 pti->pt_flags &= ~PF_REMOTE; 684 ttyflush(tp, FREAD|FWRITE); 685 return (0); 686 } 687 688 /* 689 * The rest of the ioctls shouldn't be called until 690 * the slave is open. 691 */ 692 if ((tp->t_state & TS_ISOPEN) == 0) 693 return (EAGAIN); 694 695 switch (cmd) { 696#ifdef COMPAT_43 697 case TIOCSETP: 698 case TIOCSETN: 699#endif 700 case TIOCSETD: 701 case TIOCSETA: 702 case TIOCSETAW: 703 case TIOCSETAF: 704 /* 705 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 706 * ttywflush(tp) will hang if there are characters in 707 * the outq. 708 */ 709 ndflush(&tp->t_outq, tp->t_outq.c_cc); 710 break; 711 712 case TIOCSIG: 713 if (*(unsigned int *)data >= NSIG || 714 *(unsigned int *)data == 0) 715 return(EINVAL); 716 if ((tp->t_lflag&NOFLSH) == 0) 717 ttyflush(tp, FREAD|FWRITE);
| 256 error = ttysleep(tp, &lbolt, TTIPRI | PCATCH, "ptsbg", 257 0); 258 if (error) 259 return (error); 260 } 261 if (tp->t_canq.c_cc == 0) { 262 if (flag & IO_NDELAY) 263 return (EWOULDBLOCK); 264 error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH, 265 "ptsin", 0); 266 if (error) 267 return (error); 268 goto again; 269 } 270 while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) 271 if (ureadc(getc(&tp->t_canq), uio) < 0) { 272 error = EFAULT; 273 break; 274 } 275 if (tp->t_canq.c_cc == 1) 276 (void) getc(&tp->t_canq); 277 if (tp->t_canq.c_cc) 278 return (error); 279 } else 280 if (tp->t_oproc) 281 error = (*linesw[tp->t_line].l_read)(tp, uio, flag); 282 ptcwakeup(tp, FWRITE); 283 return (error); 284} 285 286/* 287 * Write to pseudo-tty. 288 * Wakeups of controlling tty will happen 289 * indirectly, when tty driver calls ptsstart. 290 */ 291static int 292ptswrite(dev, uio, flag) 293 dev_t dev; 294 struct uio *uio; 295 int flag; 296{ 297 register struct tty *tp; 298 299 tp = dev->si_tty; 300 if (tp->t_oproc == 0) 301 return (EIO); 302 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 303} 304 305/* 306 * Start output on pseudo-tty. 307 * Wake up process selecting or sleeping for input from controlling tty. 308 */ 309static void 310ptsstart(tp) 311 struct tty *tp; 312{ 313 register struct pt_ioctl *pti = tp->t_dev->si_drv1; 314 315 if (tp->t_state & TS_TTSTOP) 316 return; 317 if (pti->pt_flags & PF_STOPPED) { 318 pti->pt_flags &= ~PF_STOPPED; 319 pti->pt_send = TIOCPKT_START; 320 } 321 ptcwakeup(tp, FREAD); 322} 323 324static void 325ptcwakeup(tp, flag) 326 struct tty *tp; 327 int flag; 328{ 329 struct pt_ioctl *pti = tp->t_dev->si_drv1; 330 331 if (flag & FREAD) { 332 selwakeup(&pti->pt_selr); 333 wakeup(TSA_PTC_READ(tp)); 334 } 335 if (flag & FWRITE) { 336 selwakeup(&pti->pt_selw); 337 wakeup(TSA_PTC_WRITE(tp)); 338 } 339} 340 341static int 342ptcopen(dev, flag, devtype, td) 343 dev_t dev; 344 int flag, devtype; 345 struct thread *td; 346{ 347 struct proc *p = td->td_proc; 348 register struct tty *tp; 349 struct pt_ioctl *pti; 350 351 if (!dev->si_drv1) 352 ptyinit(dev); 353 if (!dev->si_drv1) 354 return(ENXIO); 355 tp = dev->si_tty; 356 if (tp->t_oproc) 357 return (EIO); 358 tp->t_timeout = -1; 359 tp->t_oproc = ptsstart; 360 tp->t_stop = ptsstop; 361 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 362 tp->t_lflag &= ~EXTPROC; 363 pti = dev->si_drv1; 364 pti->pt_prison = p->p_ucred->cr_prison; 365 pti->pt_flags = 0; 366 pti->pt_send = 0; 367 pti->pt_ucntl = 0; 368 return (0); 369} 370 371static int 372ptcclose(dev, flags, fmt, td) 373 dev_t dev; 374 int flags; 375 int fmt; 376 struct thread *td; 377{ 378 register struct tty *tp; 379 380 tp = dev->si_tty; 381 (void)(*linesw[tp->t_line].l_modem)(tp, 0); 382 383 /* 384 * XXX MDMBUF makes no sense for ptys but would inhibit the above 385 * l_modem(). CLOCAL makes sense but isn't supported. Special 386 * l_modem()s that ignore carrier drop make no sense for ptys but 387 * may be in use because other parts of the line discipline make 388 * sense for ptys. Recover by doing everything that a normal 389 * ttymodem() would have done except for sending a SIGHUP. 390 */ 391 if (tp->t_state & TS_ISOPEN) { 392 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 393 tp->t_state |= TS_ZOMBIE; 394 ttyflush(tp, FREAD | FWRITE); 395 } 396 397 tp->t_oproc = 0; /* mark closed */ 398 return (0); 399} 400 401static int 402ptcread(dev, uio, flag) 403 dev_t dev; 404 struct uio *uio; 405 int flag; 406{ 407 register struct tty *tp = dev->si_tty; 408 struct pt_ioctl *pti = dev->si_drv1; 409 char buf[BUFSIZ]; 410 int error = 0, cc; 411 412 /* 413 * We want to block until the slave 414 * is open, and there's something to read; 415 * but if we lost the slave or we're NBIO, 416 * then return the appropriate error instead. 417 */ 418 for (;;) { 419 if (tp->t_state&TS_ISOPEN) { 420 if (pti->pt_flags&PF_PKT && pti->pt_send) { 421 error = ureadc((int)pti->pt_send, uio); 422 if (error) 423 return (error); 424 if (pti->pt_send & TIOCPKT_IOCTL) { 425 cc = min(uio->uio_resid, 426 sizeof(tp->t_termios)); 427 uiomove((caddr_t)&tp->t_termios, cc, 428 uio); 429 } 430 pti->pt_send = 0; 431 return (0); 432 } 433 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 434 error = ureadc((int)pti->pt_ucntl, uio); 435 if (error) 436 return (error); 437 pti->pt_ucntl = 0; 438 return (0); 439 } 440 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 441 break; 442 } 443 if ((tp->t_state & TS_CONNECTED) == 0) 444 return (0); /* EOF */ 445 if (flag & IO_NDELAY) 446 return (EWOULDBLOCK); 447 error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0); 448 if (error) 449 return (error); 450 } 451 if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 452 error = ureadc(0, uio); 453 while (uio->uio_resid > 0 && error == 0) { 454 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ)); 455 if (cc <= 0) 456 break; 457 error = uiomove(buf, cc, uio); 458 } 459 ttwwakeup(tp); 460 return (error); 461} 462 463static void 464ptsstop(tp, flush) 465 register struct tty *tp; 466 int flush; 467{ 468 struct pt_ioctl *pti = tp->t_dev->si_drv1; 469 int flag; 470 471 /* note: FLUSHREAD and FLUSHWRITE already ok */ 472 if (flush == 0) { 473 flush = TIOCPKT_STOP; 474 pti->pt_flags |= PF_STOPPED; 475 } else 476 pti->pt_flags &= ~PF_STOPPED; 477 pti->pt_send |= flush; 478 /* change of perspective */ 479 flag = 0; 480 if (flush & FREAD) 481 flag |= FWRITE; 482 if (flush & FWRITE) 483 flag |= FREAD; 484 ptcwakeup(tp, flag); 485} 486 487static int 488ptcpoll(dev, events, td) 489 dev_t dev; 490 int events; 491 struct thread *td; 492{ 493 register struct tty *tp = dev->si_tty; 494 struct pt_ioctl *pti = dev->si_drv1; 495 int revents = 0; 496 int s; 497 498 if ((tp->t_state & TS_CONNECTED) == 0) 499 return (seltrue(dev, events, td) | POLLHUP); 500 501 /* 502 * Need to block timeouts (ttrstart). 503 */ 504 s = spltty(); 505 506 if (events & (POLLIN | POLLRDNORM)) 507 if ((tp->t_state & TS_ISOPEN) && 508 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) || 509 ((pti->pt_flags & PF_PKT) && pti->pt_send) || 510 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl))) 511 revents |= events & (POLLIN | POLLRDNORM); 512 513 if (events & (POLLOUT | POLLWRNORM)) 514 if (tp->t_state & TS_ISOPEN && 515 ((pti->pt_flags & PF_REMOTE) ? 516 (tp->t_canq.c_cc == 0) : 517 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) || 518 (tp->t_canq.c_cc == 0 && (tp->t_lflag & ICANON))))) 519 revents |= events & (POLLOUT | POLLWRNORM); 520 521 if (events & POLLHUP) 522 if ((tp->t_state & TS_CARR_ON) == 0) 523 revents |= POLLHUP; 524 525 if (revents == 0) { 526 if (events & (POLLIN | POLLRDNORM)) 527 selrecord(td, &pti->pt_selr); 528 529 if (events & (POLLOUT | POLLWRNORM)) 530 selrecord(td, &pti->pt_selw); 531 } 532 splx(s); 533 534 return (revents); 535} 536 537static int 538ptcwrite(dev, uio, flag) 539 dev_t dev; 540 register struct uio *uio; 541 int flag; 542{ 543 register struct tty *tp = dev->si_tty; 544 register u_char *cp = 0; 545 register int cc = 0; 546 u_char locbuf[BUFSIZ]; 547 int cnt = 0; 548 struct pt_ioctl *pti = dev->si_drv1; 549 int error = 0; 550 551again: 552 if ((tp->t_state&TS_ISOPEN) == 0) 553 goto block; 554 if (pti->pt_flags & PF_REMOTE) { 555 if (tp->t_canq.c_cc) 556 goto block; 557 while ((uio->uio_resid > 0 || cc > 0) && 558 tp->t_canq.c_cc < TTYHOG - 1) { 559 if (cc == 0) { 560 cc = min(uio->uio_resid, BUFSIZ); 561 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 562 cp = locbuf; 563 error = uiomove((caddr_t)cp, cc, uio); 564 if (error) 565 return (error); 566 /* check again for safety */ 567 if ((tp->t_state & TS_ISOPEN) == 0) { 568 /* adjust as usual */ 569 uio->uio_resid += cc; 570 return (EIO); 571 } 572 } 573 if (cc > 0) { 574 cc = b_to_q((char *)cp, cc, &tp->t_canq); 575 /* 576 * XXX we don't guarantee that the canq size 577 * is >= TTYHOG, so the above b_to_q() may 578 * leave some bytes uncopied. However, space 579 * is guaranteed for the null terminator if 580 * we don't fail here since (TTYHOG - 1) is 581 * not a multiple of CBSIZE. 582 */ 583 if (cc > 0) 584 break; 585 } 586 } 587 /* adjust for data copied in but not written */ 588 uio->uio_resid += cc; 589 (void) putc(0, &tp->t_canq); 590 ttwakeup(tp); 591 wakeup(TSA_PTS_READ(tp)); 592 return (0); 593 } 594 while (uio->uio_resid > 0 || cc > 0) { 595 if (cc == 0) { 596 cc = min(uio->uio_resid, BUFSIZ); 597 cp = locbuf; 598 error = uiomove((caddr_t)cp, cc, uio); 599 if (error) 600 return (error); 601 /* check again for safety */ 602 if ((tp->t_state & TS_ISOPEN) == 0) { 603 /* adjust for data copied in but not written */ 604 uio->uio_resid += cc; 605 return (EIO); 606 } 607 } 608 while (cc > 0) { 609 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 610 (tp->t_canq.c_cc > 0 || !(tp->t_lflag&ICANON))) { 611 wakeup(TSA_HUP_OR_INPUT(tp)); 612 goto block; 613 } 614 (*linesw[tp->t_line].l_rint)(*cp++, tp); 615 cnt++; 616 cc--; 617 } 618 cc = 0; 619 } 620 return (0); 621block: 622 /* 623 * Come here to wait for slave to open, for space 624 * in outq, or space in rawq, or an empty canq. 625 */ 626 if ((tp->t_state & TS_CONNECTED) == 0) { 627 /* adjust for data copied in but not written */ 628 uio->uio_resid += cc; 629 return (EIO); 630 } 631 if (flag & IO_NDELAY) { 632 /* adjust for data copied in but not written */ 633 uio->uio_resid += cc; 634 if (cnt == 0) 635 return (EWOULDBLOCK); 636 return (0); 637 } 638 error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0); 639 if (error) { 640 /* adjust for data copied in but not written */ 641 uio->uio_resid += cc; 642 return (error); 643 } 644 goto again; 645} 646 647/*ARGSUSED*/ 648static int 649ptyioctl(dev, cmd, data, flag, td) 650 dev_t dev; 651 u_long cmd; 652 caddr_t data; 653 int flag; 654 struct thread *td; 655{ 656 register struct tty *tp = dev->si_tty; 657 register struct pt_ioctl *pti = dev->si_drv1; 658 register u_char *cc = tp->t_cc; 659 int stop, error; 660 661 if (devsw(dev)->d_open == ptcopen) { 662 switch (cmd) { 663 664 case TIOCGPGRP: 665 /* 666 * We avoid calling ttioctl on the controller since, 667 * in that case, tp must be the controlling terminal. 668 */ 669 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 670 return (0); 671 672 case TIOCPKT: 673 if (*(int *)data) { 674 if (pti->pt_flags & PF_UCNTL) 675 return (EINVAL); 676 pti->pt_flags |= PF_PKT; 677 } else 678 pti->pt_flags &= ~PF_PKT; 679 return (0); 680 681 case TIOCUCNTL: 682 if (*(int *)data) { 683 if (pti->pt_flags & PF_PKT) 684 return (EINVAL); 685 pti->pt_flags |= PF_UCNTL; 686 } else 687 pti->pt_flags &= ~PF_UCNTL; 688 return (0); 689 690 case TIOCREMOTE: 691 if (*(int *)data) 692 pti->pt_flags |= PF_REMOTE; 693 else 694 pti->pt_flags &= ~PF_REMOTE; 695 ttyflush(tp, FREAD|FWRITE); 696 return (0); 697 } 698 699 /* 700 * The rest of the ioctls shouldn't be called until 701 * the slave is open. 702 */ 703 if ((tp->t_state & TS_ISOPEN) == 0) 704 return (EAGAIN); 705 706 switch (cmd) { 707#ifdef COMPAT_43 708 case TIOCSETP: 709 case TIOCSETN: 710#endif 711 case TIOCSETD: 712 case TIOCSETA: 713 case TIOCSETAW: 714 case TIOCSETAF: 715 /* 716 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 717 * ttywflush(tp) will hang if there are characters in 718 * the outq. 719 */ 720 ndflush(&tp->t_outq, tp->t_outq.c_cc); 721 break; 722 723 case TIOCSIG: 724 if (*(unsigned int *)data >= NSIG || 725 *(unsigned int *)data == 0) 726 return(EINVAL); 727 if ((tp->t_lflag&NOFLSH) == 0) 728 ttyflush(tp, FREAD|FWRITE);
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718 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1);
| 729 if (tp->t_pgrp != NULL) { 730 PGRP_LOCK(tp->t_pgrp); 731 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); 732 PGRP_UNLOCK(tp->t_pgrp); 733 }
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719 if ((*(unsigned int *)data == SIGINFO) && 720 ((tp->t_lflag&NOKERNINFO) == 0)) 721 ttyinfo(tp); 722 return(0); 723 } 724 } 725 if (cmd == TIOCEXT) { 726 /* 727 * When the EXTPROC bit is being toggled, we need 728 * to send an TIOCPKT_IOCTL if the packet driver 729 * is turned on. 730 */ 731 if (*(int *)data) { 732 if (pti->pt_flags & PF_PKT) { 733 pti->pt_send |= TIOCPKT_IOCTL; 734 ptcwakeup(tp, FREAD); 735 } 736 tp->t_lflag |= EXTPROC; 737 } else { 738 if ((tp->t_lflag & EXTPROC) && 739 (pti->pt_flags & PF_PKT)) { 740 pti->pt_send |= TIOCPKT_IOCTL; 741 ptcwakeup(tp, FREAD); 742 } 743 tp->t_lflag &= ~EXTPROC; 744 } 745 return(0); 746 } 747 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td); 748 if (error == ENOIOCTL) 749 error = ttioctl(tp, cmd, data, flag); 750 if (error == ENOIOCTL) { 751 if (pti->pt_flags & PF_UCNTL && 752 (cmd & ~0xff) == UIOCCMD(0)) { 753 if (cmd & 0xff) { 754 pti->pt_ucntl = (u_char)cmd; 755 ptcwakeup(tp, FREAD); 756 } 757 return (0); 758 } 759 error = ENOTTY; 760 } 761 /* 762 * If external processing and packet mode send ioctl packet. 763 */ 764 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 765 switch(cmd) { 766 case TIOCSETA: 767 case TIOCSETAW: 768 case TIOCSETAF: 769#ifdef COMPAT_43 770 case TIOCSETP: 771 case TIOCSETN: 772#endif 773#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 774 case TIOCSETC: 775 case TIOCSLTC: 776 case TIOCLBIS: 777 case TIOCLBIC: 778 case TIOCLSET: 779#endif 780 pti->pt_send |= TIOCPKT_IOCTL; 781 ptcwakeup(tp, FREAD); 782 default: 783 break; 784 } 785 } 786 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 787 && CCEQ(cc[VSTART], CTRL('q')); 788 if (pti->pt_flags & PF_NOSTOP) { 789 if (stop) { 790 pti->pt_send &= ~TIOCPKT_NOSTOP; 791 pti->pt_send |= TIOCPKT_DOSTOP; 792 pti->pt_flags &= ~PF_NOSTOP; 793 ptcwakeup(tp, FREAD); 794 } 795 } else { 796 if (!stop) { 797 pti->pt_send &= ~TIOCPKT_DOSTOP; 798 pti->pt_send |= TIOCPKT_NOSTOP; 799 pti->pt_flags |= PF_NOSTOP; 800 ptcwakeup(tp, FREAD); 801 } 802 } 803 return (error); 804} 805 806 807static void ptc_drvinit __P((void *unused)); 808 809static void pty_clone __P((void *arg, char *name, int namelen, dev_t *dev)); 810 811static void 812pty_clone(arg, name, namelen, dev) 813 void *arg; 814 char *name; 815 int namelen; 816 dev_t *dev; 817{ 818 int u; 819 820 if (*dev != NODEV) 821 return; 822 if (bcmp(name, "pty", 3) != 0) 823 return; 824 if (name[5] != '\0') 825 return; 826 switch (name[3]) { 827 case 'p': u = 0; break; 828 case 'q': u = 32; break; 829 case 'r': u = 64; break; 830 case 's': u = 96; break; 831 case 'P': u = 128; break; 832 case 'Q': u = 160; break; 833 case 'R': u = 192; break; 834 case 'S': u = 224; break; 835 default: return; 836 } 837 if (name[4] >= '0' && name[4] <= '9') 838 u += name[4] - '0'; 839 else if (name[4] >= 'a' && name[4] <= 'v') 840 u += name[4] - 'a' + 10; 841 else 842 return; 843 *dev = make_dev(&ptc_cdevsw, u, 844 UID_ROOT, GID_WHEEL, 0666, "pty%c%r", names[u / 32], u % 32); 845 (*dev)->si_flags |= SI_CHEAPCLONE; 846 return; 847} 848 849static void 850ptc_drvinit(unused) 851 void *unused; 852{ 853 EVENTHANDLER_REGISTER(dev_clone, pty_clone, 0, 1000); 854 cdevsw_add(&pts_cdevsw); 855 cdevsw_add(&ptc_cdevsw); 856} 857 858SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL)
| 734 if ((*(unsigned int *)data == SIGINFO) && 735 ((tp->t_lflag&NOKERNINFO) == 0)) 736 ttyinfo(tp); 737 return(0); 738 } 739 } 740 if (cmd == TIOCEXT) { 741 /* 742 * When the EXTPROC bit is being toggled, we need 743 * to send an TIOCPKT_IOCTL if the packet driver 744 * is turned on. 745 */ 746 if (*(int *)data) { 747 if (pti->pt_flags & PF_PKT) { 748 pti->pt_send |= TIOCPKT_IOCTL; 749 ptcwakeup(tp, FREAD); 750 } 751 tp->t_lflag |= EXTPROC; 752 } else { 753 if ((tp->t_lflag & EXTPROC) && 754 (pti->pt_flags & PF_PKT)) { 755 pti->pt_send |= TIOCPKT_IOCTL; 756 ptcwakeup(tp, FREAD); 757 } 758 tp->t_lflag &= ~EXTPROC; 759 } 760 return(0); 761 } 762 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td); 763 if (error == ENOIOCTL) 764 error = ttioctl(tp, cmd, data, flag); 765 if (error == ENOIOCTL) { 766 if (pti->pt_flags & PF_UCNTL && 767 (cmd & ~0xff) == UIOCCMD(0)) { 768 if (cmd & 0xff) { 769 pti->pt_ucntl = (u_char)cmd; 770 ptcwakeup(tp, FREAD); 771 } 772 return (0); 773 } 774 error = ENOTTY; 775 } 776 /* 777 * If external processing and packet mode send ioctl packet. 778 */ 779 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 780 switch(cmd) { 781 case TIOCSETA: 782 case TIOCSETAW: 783 case TIOCSETAF: 784#ifdef COMPAT_43 785 case TIOCSETP: 786 case TIOCSETN: 787#endif 788#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 789 case TIOCSETC: 790 case TIOCSLTC: 791 case TIOCLBIS: 792 case TIOCLBIC: 793 case TIOCLSET: 794#endif 795 pti->pt_send |= TIOCPKT_IOCTL; 796 ptcwakeup(tp, FREAD); 797 default: 798 break; 799 } 800 } 801 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 802 && CCEQ(cc[VSTART], CTRL('q')); 803 if (pti->pt_flags & PF_NOSTOP) { 804 if (stop) { 805 pti->pt_send &= ~TIOCPKT_NOSTOP; 806 pti->pt_send |= TIOCPKT_DOSTOP; 807 pti->pt_flags &= ~PF_NOSTOP; 808 ptcwakeup(tp, FREAD); 809 } 810 } else { 811 if (!stop) { 812 pti->pt_send &= ~TIOCPKT_DOSTOP; 813 pti->pt_send |= TIOCPKT_NOSTOP; 814 pti->pt_flags |= PF_NOSTOP; 815 ptcwakeup(tp, FREAD); 816 } 817 } 818 return (error); 819} 820 821 822static void ptc_drvinit __P((void *unused)); 823 824static void pty_clone __P((void *arg, char *name, int namelen, dev_t *dev)); 825 826static void 827pty_clone(arg, name, namelen, dev) 828 void *arg; 829 char *name; 830 int namelen; 831 dev_t *dev; 832{ 833 int u; 834 835 if (*dev != NODEV) 836 return; 837 if (bcmp(name, "pty", 3) != 0) 838 return; 839 if (name[5] != '\0') 840 return; 841 switch (name[3]) { 842 case 'p': u = 0; break; 843 case 'q': u = 32; break; 844 case 'r': u = 64; break; 845 case 's': u = 96; break; 846 case 'P': u = 128; break; 847 case 'Q': u = 160; break; 848 case 'R': u = 192; break; 849 case 'S': u = 224; break; 850 default: return; 851 } 852 if (name[4] >= '0' && name[4] <= '9') 853 u += name[4] - '0'; 854 else if (name[4] >= 'a' && name[4] <= 'v') 855 u += name[4] - 'a' + 10; 856 else 857 return; 858 *dev = make_dev(&ptc_cdevsw, u, 859 UID_ROOT, GID_WHEEL, 0666, "pty%c%r", names[u / 32], u % 32); 860 (*dev)->si_flags |= SI_CHEAPCLONE; 861 return; 862} 863 864static void 865ptc_drvinit(unused) 866 void *unused; 867{ 868 EVENTHANDLER_REGISTER(dev_clone, pty_clone, 0, 1000); 869 cdevsw_add(&pts_cdevsw); 870 cdevsw_add(&ptc_cdevsw); 871} 872 873SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL)
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