sys/kern/tty_compat.c

   1 /*-
   2  * Copyright (c) 1982, 1986, 1991, 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_compat.c        8.1 (Berkeley) 6/10/93
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 #include "opt_compat.h"
  36
  37 /*
  38  * mapping routines for old line discipline (yuck)
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/ioctl_compat.h>
  44 #include <sys/tty.h>
  45 #include <sys/kernel.h>
  46 #include <sys/sysctl.h>
  47
  48 struct speedtab {
  49         int sp_speed;                   /* Speed. */
  50         int sp_code;                    /* Code. */
  51 };
  52
  53 static int ttcompatgetflags(struct tty *tp);
  54 static void ttcompatsetflags(struct tty *tp, struct termios *t);
  55 static void ttcompatsetlflags(struct tty *tp, struct termios *t);
  56 static int ttcompatspeedtab(int speed, struct speedtab *table);
  57
  58 static int ttydebug = 0;
  59 SYSCTL_INT(_debug, OID_AUTO, ttydebug, CTLFLAG_RW, &ttydebug, 0, "");
  60
  61 static struct speedtab compatspeeds[] = {
  62 #define MAX_SPEED       17
  63         { 115200, 17 },
  64         { 57600, 16 },
  65         { 38400, 15 },
  66         { 19200, 14 },
  67         { 9600, 13 },
  68         { 4800, 12 },
  69         { 2400, 11 },
  70         { 1800, 10 },
  71         { 1200, 9 },
  72         { 600,  8 },
  73         { 300,  7 },
  74         { 200,  6 },
  75         { 150,  5 },
  76         { 134,  4 },
  77         { 110,  3 },
  78         { 75,   2 },
  79         { 50,   1 },
  80         { 0,    0 },
  81         { -1,   -1 },
  82 };
  83 static int compatspcodes[] = {
  84         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
  85         1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200,
  86 };
  87
  88 static int
  89 ttcompatspeedtab(int speed, struct speedtab *table)
  90 {
  91         if (speed == 0)
  92                 return (0); /* hangup */
  93         for ( ; table->sp_speed > 0; table++)
  94                 if (table->sp_speed <= speed) /* nearest one, rounded down */
  95                         return (table->sp_code);
  96         return (1); /* 50, min and not hangup */
  97 }
  98
  99 static int
 100 ttsetcompat(struct tty *tp, u_long *com, caddr_t data, struct termios *term)
 101 {
 102         switch (*com) {
 103         case TIOCSETP:
 104         case TIOCSETN: {
 105                 struct sgttyb *sg = (struct sgttyb *)data;
 106                 int speed;
 107
 108                 if ((speed = sg->sg_ispeed) > MAX_SPEED || speed < 0)
 109                         return(EINVAL);
 110                 else if (speed != ttcompatspeedtab(tp->t_termios.c_ispeed,
 111                     compatspeeds))
 112                         term->c_ispeed = compatspcodes[speed];
 113                 else
 114                         term->c_ispeed = tp->t_termios.c_ispeed;
 115                 if ((speed = sg->sg_ospeed) > MAX_SPEED || speed < 0)
 116                         return(EINVAL);
 117                 else if (speed != ttcompatspeedtab(tp->t_termios.c_ospeed,
 118                     compatspeeds))
 119                         term->c_ospeed = compatspcodes[speed];
 120                 else
 121                         term->c_ospeed = tp->t_termios.c_ospeed;
 122                 term->c_cc[VERASE] = sg->sg_erase;
 123                 term->c_cc[VKILL] = sg->sg_kill;
 124                 tp->t_compatflags = (tp->t_compatflags&0xffff0000) |
 125                     (sg->sg_flags&0xffff);
 126                 ttcompatsetflags(tp, term);
 127                 *com = (*com == TIOCSETP) ? TIOCSETAF : TIOCSETA;
 128                 break;
 129         }
 130         case TIOCSETC: {
 131                 struct tchars *tc = (struct tchars *)data;
 132                 cc_t *cc;
 133
 134                 cc = term->c_cc;
 135                 cc[VINTR] = tc->t_intrc;
 136                 cc[VQUIT] = tc->t_quitc;
 137                 cc[VSTART] = tc->t_startc;
 138                 cc[VSTOP] = tc->t_stopc;
 139                 cc[VEOF] = tc->t_eofc;
 140                 cc[VEOL] = tc->t_brkc;
 141                 if (tc->t_brkc == (char)_POSIX_VDISABLE)
 142                         cc[VEOL2] = _POSIX_VDISABLE;
 143                 *com = TIOCSETA;
 144                 break;
 145         }
 146         case TIOCSLTC: {
 147                 struct ltchars *ltc = (struct ltchars *)data;
 148                 cc_t *cc;
 149
 150                 cc = term->c_cc;
 151                 cc[VSUSP] = ltc->t_suspc;
 152                 cc[VDSUSP] = ltc->t_dsuspc;
 153                 cc[VREPRINT] = ltc->t_rprntc;
 154                 cc[VDISCARD] = ltc->t_flushc;
 155                 cc[VWERASE] = ltc->t_werasc;
 156                 cc[VLNEXT] = ltc->t_lnextc;
 157                 *com = TIOCSETA;
 158                 break;
 159         }
 160         case TIOCLBIS:
 161         case TIOCLBIC:
 162         case TIOCLSET:
 163                 if (*com == TIOCLSET)
 164                         tp->t_compatflags = (tp->t_compatflags&0xffff) |
 165                             *(int *)data<<16;
 166                 else {
 167                         tp->t_compatflags = (ttcompatgetflags(tp)&0xffff0000) |
 168                             (tp->t_compatflags&0xffff);
 169                         if (*com == TIOCLBIS)
 170                                 tp->t_compatflags |= *(int *)data<<16;
 171                         else
 172                                 tp->t_compatflags &= ~(*(int *)data<<16);
 173                 }
 174                 ttcompatsetlflags(tp, term);
 175                 *com = TIOCSETA;
 176                 break;
 177         }
 178         return 0;
 179 }
 180
 181 /*ARGSUSED*/
 182 int
 183 tty_ioctl_compat(struct tty *tp, u_long com, caddr_t data, struct thread *td)
 184 {
 185         switch (com) {
 186         case TIOCSETP:
 187         case TIOCSETN:
 188         case TIOCSETC:
 189         case TIOCSLTC:
 190         case TIOCLBIS:
 191         case TIOCLBIC:
 192         case TIOCLSET: {
 193                 struct termios term;
 194                 int error;
 195
 196                 term = tp->t_termios;
 197                 if ((error = ttsetcompat(tp, &com, data, &term)) != 0)
 198                         return error;
 199                 return tty_ioctl(tp, com, &term, td);
 200         }
 201         case TIOCGETP: {
 202                 struct sgttyb *sg = (struct sgttyb *)data;
 203                 cc_t *cc = tp->t_termios.c_cc;
 204
 205                 sg->sg_ospeed = ttcompatspeedtab(tp->t_termios.c_ospeed,
 206                     compatspeeds);
 207                 if (tp->t_termios.c_ispeed == 0)
 208                         sg->sg_ispeed = sg->sg_ospeed;
 209                 else
 210                         sg->sg_ispeed = ttcompatspeedtab(tp->t_termios.c_ispeed,
 211                             compatspeeds);
 212                 sg->sg_erase = cc[VERASE];
 213                 sg->sg_kill = cc[VKILL];
 214                 sg->sg_flags = tp->t_compatflags = ttcompatgetflags(tp);
 215                 break;
 216         }
 217         case TIOCGETC: {
 218                 struct tchars *tc = (struct tchars *)data;
 219                 cc_t *cc = tp->t_termios.c_cc;
 220
 221                 tc->t_intrc = cc[VINTR];
 222                 tc->t_quitc = cc[VQUIT];
 223                 tc->t_startc = cc[VSTART];
 224                 tc->t_stopc = cc[VSTOP];
 225                 tc->t_eofc = cc[VEOF];
 226                 tc->t_brkc = cc[VEOL];
 227                 break;
 228         }
 229         case TIOCGLTC: {
 230                 struct ltchars *ltc = (struct ltchars *)data;
 231                 cc_t *cc = tp->t_termios.c_cc;
 232
 233                 ltc->t_suspc = cc[VSUSP];
 234                 ltc->t_dsuspc = cc[VDSUSP];
 235                 ltc->t_rprntc = cc[VREPRINT];
 236                 ltc->t_flushc = cc[VDISCARD];
 237                 ltc->t_werasc = cc[VWERASE];
 238                 ltc->t_lnextc = cc[VLNEXT];
 239                 break;
 240         }
 241         case TIOCLGET:
 242                 tp->t_compatflags =
 243                  (ttcompatgetflags(tp) & 0xffff0000UL)
 244                    | (tp->t_compatflags & 0xffff);
 245                 *(int *)data = tp->t_compatflags>>16;
 246                 if (ttydebug)
 247                         printf("CLGET: returning %x\n", *(int *)data);
 248                 break;
 249
 250         case OTIOCGETD:
 251                 *(int *)data = 2;
 252                 break;
 253
 254         case OTIOCSETD: {
 255                 int ldisczero = 0;
 256
 257                 return (tty_ioctl(tp, TIOCSETD,
 258                         *(int *)data == 2 ? (caddr_t)&ldisczero : data, td));
 259             }
 260
 261         case OTIOCCONS:
 262                 *(int *)data = 1;
 263                 return (tty_ioctl(tp, TIOCCONS, data, td));
 264
 265         default:
 266                 return (ENOIOCTL);
 267         }
 268         return (0);
 269 }
 270
 271 static int
 272 ttcompatgetflags(struct tty *tp)
 273 {
 274         tcflag_t iflag  = tp->t_termios.c_iflag;
 275         tcflag_t lflag  = tp->t_termios.c_lflag;
 276         tcflag_t oflag  = tp->t_termios.c_oflag;
 277         tcflag_t cflag  = tp->t_termios.c_cflag;
 278         int flags = 0;
 279
 280         if (iflag&IXOFF)
 281                 flags |= TANDEM;
 282         if (iflag&ICRNL || oflag&ONLCR)
 283                 flags |= CRMOD;
 284         if ((cflag&CSIZE) == CS8) {
 285                 flags |= PASS8;
 286                 if (iflag&ISTRIP)
 287                         flags |= ANYP;
 288         }
 289         else if (cflag&PARENB) {
 290                 if (iflag&INPCK) {
 291                         if (cflag&PARODD)
 292                                 flags |= ODDP;
 293                         else
 294                                 flags |= EVENP;
 295                 } else
 296                         flags |= EVENP | ODDP;
 297         }
 298
 299         if ((lflag&ICANON) == 0) {
 300                 /* fudge */
 301                 if (iflag&(INPCK|ISTRIP|IXON) || lflag&(IEXTEN|ISIG)
 302                     || (cflag&(CSIZE|PARENB)) != CS8)
 303                         flags |= CBREAK;
 304                 else
 305                         flags |= RAW;
 306         }
 307         if (!(flags&RAW) && !(oflag&OPOST) && (cflag&(CSIZE|PARENB)) == CS8)
 308                 flags |= LITOUT;
 309         if (cflag&MDMBUF)
 310                 flags |= MDMBUF;
 311         if ((cflag&HUPCL) == 0)
 312                 flags |= NOHANG;
 313         if (oflag&TAB3)
 314                 flags |= XTABS;
 315         if (lflag&ECHOE)
 316                 flags |= CRTERA|CRTBS;
 317         if (lflag&ECHOKE)
 318                 flags |= CRTKIL|CRTBS;
 319         if (lflag&ECHOPRT)
 320                 flags |= PRTERA;
 321         if (lflag&ECHOCTL)
 322                 flags |= CTLECH;
 323         if ((iflag&IXANY) == 0)
 324                 flags |= DECCTQ;
 325         flags |= lflag&(ECHO|TOSTOP|FLUSHO|PENDIN|NOFLSH);
 326         if (ttydebug)
 327                 printf("getflags: %x\n", flags);
 328         return (flags);
 329 }
 330
 331 static void
 332 ttcompatsetflags(struct tty *tp, struct termios *t)
 333 {
 334         int flags = tp->t_compatflags;
 335         tcflag_t iflag  = t->c_iflag;
 336         tcflag_t oflag  = t->c_oflag;
 337         tcflag_t lflag  = t->c_lflag;
 338         tcflag_t cflag  = t->c_cflag;
 339
 340         if (flags & RAW) {
 341                 iflag = IGNBRK;
 342                 lflag &= ~(ECHOCTL|ISIG|ICANON|IEXTEN);
 343         } else {
 344                 iflag &= ~(PARMRK|IGNPAR|IGNCR|INLCR);
 345                 iflag |= BRKINT|IXON|IMAXBEL;
 346                 lflag |= ISIG|IEXTEN|ECHOCTL;   /* XXX was echoctl on ? */
 347                 if (flags & XTABS)
 348                         oflag |= TAB3;
 349                 else
 350                         oflag &= ~TAB3;
 351                 if (flags & CBREAK)
 352                         lflag &= ~ICANON;
 353                 else
 354                         lflag |= ICANON;
 355                 if (flags&CRMOD) {
 356                         iflag |= ICRNL;
 357                         oflag |= ONLCR;
 358                 } else {
 359                         iflag &= ~ICRNL;
 360                         oflag &= ~ONLCR;
 361                 }
 362         }
 363         if (flags&ECHO)
 364                 lflag |= ECHO;
 365         else
 366                 lflag &= ~ECHO;
 367
 368         cflag &= ~(CSIZE|PARENB);
 369         if (flags&(RAW|LITOUT|PASS8)) {
 370                 cflag |= CS8;
 371                 if (!(flags&(RAW|PASS8))
 372                     || (flags&(RAW|PASS8|ANYP)) == (PASS8|ANYP))
 373                         iflag |= ISTRIP;
 374                 else
 375                         iflag &= ~ISTRIP;
 376                 if (flags&(RAW|LITOUT))
 377                         oflag &= ~OPOST;
 378                 else
 379                         oflag |= OPOST;
 380         } else {
 381                 cflag |= CS7|PARENB;
 382                 iflag |= ISTRIP;
 383                 oflag |= OPOST;
 384         }
 385         /* XXX don't set INPCK if RAW or PASS8? */
 386         if ((flags&(EVENP|ODDP)) == EVENP) {
 387                 iflag |= INPCK;
 388                 cflag &= ~PARODD;
 389         } else if ((flags&(EVENP|ODDP)) == ODDP) {
 390                 iflag |= INPCK;
 391                 cflag |= PARODD;
 392         } else
 393                 iflag &= ~INPCK;
 394         if (flags&TANDEM)
 395                 iflag |= IXOFF;
 396         else
 397                 iflag &= ~IXOFF;
 398         if ((flags&DECCTQ) == 0)
 399                 iflag |= IXANY;
 400         else
 401                 iflag &= ~IXANY;
 402         t->c_iflag = iflag;
 403         t->c_oflag = oflag;
 404         t->c_lflag = lflag;
 405         t->c_cflag = cflag;
 406 }
 407
 408 static void
 409 ttcompatsetlflags(struct tty *tp, struct termios *t)
 410 {
 411         int flags = tp->t_compatflags;
 412         tcflag_t iflag  = t->c_iflag;
 413         tcflag_t oflag  = t->c_oflag;
 414         tcflag_t lflag  = t->c_lflag;
 415         tcflag_t cflag  = t->c_cflag;
 416
 417         iflag &= ~(PARMRK|IGNPAR|IGNCR|INLCR);
 418         if (flags&CRTERA)
 419                 lflag |= ECHOE;
 420         else
 421                 lflag &= ~ECHOE;
 422         if (flags&CRTKIL)
 423                 lflag |= ECHOKE;
 424         else
 425                 lflag &= ~ECHOKE;
 426         if (flags&PRTERA)
 427                 lflag |= ECHOPRT;
 428         else
 429                 lflag &= ~ECHOPRT;
 430         if (flags&CTLECH)
 431                 lflag |= ECHOCTL;
 432         else
 433                 lflag &= ~ECHOCTL;
 434         if (flags&TANDEM)
 435                 iflag |= IXOFF;
 436         else
 437                 iflag &= ~IXOFF;
 438         if ((flags&DECCTQ) == 0)
 439                 iflag |= IXANY;
 440         else
 441                 iflag &= ~IXANY;
 442         if (flags & MDMBUF)
 443                 cflag |= MDMBUF;
 444         else
 445                 cflag &= ~MDMBUF;
 446         if (flags&NOHANG)
 447                 cflag &= ~HUPCL;
 448         else
 449                 cflag |= HUPCL;
 450         lflag &= ~(TOSTOP|FLUSHO|PENDIN|NOFLSH);
 451         lflag |= flags&(TOSTOP|FLUSHO|PENDIN|NOFLSH);
 452
 453         /*
 454          * The next if-else statement is copied from above so don't bother
 455          * checking it separately.  We could avoid fiddlling with the
 456          * character size if the mode is already RAW or if neither the
 457          * LITOUT bit or the PASS8 bit is being changed, but the delta of
 458          * the change is not available here and skipping the RAW case would
 459          * make the code different from above.
 460          */
 461         cflag &= ~(CSIZE|PARENB);
 462         if (flags&(RAW|LITOUT|PASS8)) {
 463                 cflag |= CS8;
 464                 if (!(flags&(RAW|PASS8))
 465                     || (flags&(RAW|PASS8|ANYP)) == (PASS8|ANYP))
 466                         iflag |= ISTRIP;
 467                 else
 468                         iflag &= ~ISTRIP;
 469                 if (flags&(RAW|LITOUT))
 470                         oflag &= ~OPOST;
 471                 else
 472                         oflag |= OPOST;
 473         } else {
 474                 cflag |= CS7|PARENB;
 475                 iflag |= ISTRIP;
 476                 oflag |= OPOST;
 477         }
 478         t->c_iflag = iflag;
 479         t->c_oflag = oflag;
 480         t->c_lflag = lflag;
 481         t->c_cflag = cflag;
 482 }