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  * 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_compat.c        8.1 (Berkeley) 6/10/93
  34  * $FreeBSD: src/sys/kern/tty_compat.c,v 1.29 1999/08/28 00:46:20 peter Exp $
  35  * $DragonFly: src/sys/kern/tty_compat.c,v 1.4 2003/08/26 21:09:02 rob Exp $
  36  */
  37
  38 #include "opt_compat.h"
  39
  40 /*
  41  * mapping routines for old line discipline (yuck)
  42  */
  43 #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
  44
  45 #include <sys/param.h>
  46 #include <sys/systm.h>
  47 #include <sys/ioctl_compat.h>
  48 #include <sys/tty.h>
  49 #include <sys/kernel.h>
  50 #include <sys/sysctl.h>
  51
  52 static int ttcompatgetflags     (struct tty     *tp);
  53 static void ttcompatsetflags    (struct tty     *tp, struct termios *t);
  54 static void ttcompatsetlflags   (struct tty     *tp, struct termios *t);
  55 static int ttcompatspeedtab     (int speed, struct speedtab *table);
  56
  57 static int ttydebug = 0;
  58 SYSCTL_INT(_debug, OID_AUTO, ttydebug, CTLFLAG_RW, &ttydebug, 0, "");
  59
  60 static struct speedtab compatspeeds[] = {
  61 #define MAX_SPEED       17
  62         { 115200, 17 },
  63         { 57600, 16 },
  64         { 38400, 15 },
  65         { 19200, 14 },
  66         { 9600, 13 },
  67         { 4800, 12 },
  68         { 2400, 11 },
  69         { 1800, 10 },
  70         { 1200, 9 },
  71         { 600,  8 },
  72         { 300,  7 },
  73         { 200,  6 },
  74         { 150,  5 },
  75         { 134,  4 },
  76         { 110,  3 },
  77         { 75,   2 },
  78         { 50,   1 },
  79         { 0,    0 },
  80         { -1,   -1 },
  81 };
  82 static int compatspcodes[] = {
  83         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
  84         1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200,
  85 };
  86
  87 static int
  88 ttcompatspeedtab(speed, table)
  89         int speed;
  90         struct speedtab *table;
  91 {
  92         if (speed == 0)
  93                 return (0); /* hangup */
  94         for ( ; table->sp_speed > 0; table++)
  95                 if (table->sp_speed <= speed) /* nearest one, rounded down */
  96                         return (table->sp_code);
  97         return (1); /* 50, min and not hangup */
  98 }
  99
 100 int
 101 ttsetcompat(tp, com, data, term)
 102         struct tty *tp;
 103         u_long *com;
 104         caddr_t data;
 105         struct termios *term;
 106 {
 107         switch (*com) {
 108         case TIOCSETP:
 109         case TIOCSETN: {
 110                 struct sgttyb *sg = (struct sgttyb *)data;
 111                 int speed;
 112
 113                 if ((speed = sg->sg_ispeed) > MAX_SPEED || speed < 0)
 114                         return(EINVAL);
 115                 else if (speed != ttcompatspeedtab(tp->t_ispeed, compatspeeds))
 116                         term->c_ispeed = compatspcodes[speed];
 117                 else
 118                         term->c_ispeed = tp->t_ispeed;
 119                 if ((speed = sg->sg_ospeed) > MAX_SPEED || speed < 0)
 120                         return(EINVAL);
 121                 else if (speed != ttcompatspeedtab(tp->t_ospeed, compatspeeds))
 122                         term->c_ospeed = compatspcodes[speed];
 123                 else
 124                         term->c_ospeed = tp->t_ospeed;
 125                 term->c_cc[VERASE] = sg->sg_erase;
 126                 term->c_cc[VKILL] = sg->sg_kill;
 127                 tp->t_flags = (tp->t_flags&0xffff0000) | (sg->sg_flags&0xffff);
 128                 ttcompatsetflags(tp, term);
 129                 *com = (*com == TIOCSETP) ? TIOCSETAF : TIOCSETA;
 130                 break;
 131         }
 132         case TIOCSETC: {
 133                 struct tchars *tc = (struct tchars *)data;
 134                 cc_t *cc;
 135
 136                 cc = term->c_cc;
 137                 cc[VINTR] = tc->t_intrc;
 138                 cc[VQUIT] = tc->t_quitc;
 139                 cc[VSTART] = tc->t_startc;
 140                 cc[VSTOP] = tc->t_stopc;
 141                 cc[VEOF] = tc->t_eofc;
 142                 cc[VEOL] = tc->t_brkc;
 143                 if (tc->t_brkc == -1)
 144                         cc[VEOL2] = _POSIX_VDISABLE;
 145                 *com = TIOCSETA;
 146                 break;
 147         }
 148         case TIOCSLTC: {
 149                 struct ltchars *ltc = (struct ltchars *)data;
 150                 cc_t *cc;
 151
 152                 cc = term->c_cc;
 153                 cc[VSUSP] = ltc->t_suspc;
 154                 cc[VDSUSP] = ltc->t_dsuspc;
 155                 cc[VREPRINT] = ltc->t_rprntc;
 156                 cc[VDISCARD] = ltc->t_flushc;
 157                 cc[VWERASE] = ltc->t_werasc;
 158                 cc[VLNEXT] = ltc->t_lnextc;
 159                 *com = TIOCSETA;
 160                 break;
 161         }
 162         case TIOCLBIS:
 163         case TIOCLBIC:
 164         case TIOCLSET:
 165                 if (*com == TIOCLSET)
 166                         tp->t_flags = (tp->t_flags&0xffff) | *(int *)data<<16;
 167                 else {
 168                         tp->t_flags =
 169                          (ttcompatgetflags(tp)&0xffff0000)|(tp->t_flags&0xffff);
 170                         if (*com == TIOCLBIS)
 171                                 tp->t_flags |= *(int *)data<<16;
 172                         else
 173                                 tp->t_flags &= ~(*(int *)data<<16);
 174                 }
 175                 ttcompatsetlflags(tp, term);
 176                 *com = TIOCSETA;
 177                 break;
 178         }
 179         return 0;
 180 }
 181
 182 /*ARGSUSED*/
 183 int
 184 ttcompat(tp, com, data, flag)
 185         struct tty *tp;
 186         u_long com;
 187         caddr_t data;
 188         int flag;
 189 {
 190         switch (com) {
 191         case TIOCSETP:
 192         case TIOCSETN:
 193         case TIOCSETC:
 194         case TIOCSLTC:
 195         case TIOCLBIS:
 196         case TIOCLBIC:
 197         case TIOCLSET: {
 198                 struct termios term;
 199                 int error;
 200
 201                 term = tp->t_termios;
 202                 if ((error = ttsetcompat(tp, &com, data, &term)) != 0)
 203                         return error;
 204                 return ttioctl(tp, com, &term, flag);
 205         }
 206         case TIOCGETP: {
 207                 struct sgttyb *sg = (struct sgttyb *)data;
 208                 cc_t *cc = tp->t_cc;
 209
 210                 sg->sg_ospeed = ttcompatspeedtab(tp->t_ospeed, compatspeeds);
 211                 if (tp->t_ispeed == 0)
 212                         sg->sg_ispeed = sg->sg_ospeed;
 213                 else
 214                         sg->sg_ispeed = ttcompatspeedtab(tp->t_ispeed, compatspeeds);
 215                 sg->sg_erase = cc[VERASE];
 216                 sg->sg_kill = cc[VKILL];
 217                 sg->sg_flags = tp->t_flags = ttcompatgetflags(tp);
 218                 break;
 219         }
 220         case TIOCGETC: {
 221                 struct tchars *tc = (struct tchars *)data;
 222                 cc_t *cc = tp->t_cc;
 223
 224                 tc->t_intrc = cc[VINTR];
 225                 tc->t_quitc = cc[VQUIT];
 226                 tc->t_startc = cc[VSTART];
 227                 tc->t_stopc = cc[VSTOP];
 228                 tc->t_eofc = cc[VEOF];
 229                 tc->t_brkc = cc[VEOL];
 230                 break;
 231         }
 232         case TIOCGLTC: {
 233                 struct ltchars *ltc = (struct ltchars *)data;
 234                 cc_t *cc = tp->t_cc;
 235
 236                 ltc->t_suspc = cc[VSUSP];
 237                 ltc->t_dsuspc = cc[VDSUSP];
 238                 ltc->t_rprntc = cc[VREPRINT];
 239                 ltc->t_flushc = cc[VDISCARD];
 240                 ltc->t_werasc = cc[VWERASE];
 241                 ltc->t_lnextc = cc[VLNEXT];
 242                 break;
 243         }
 244         case TIOCLGET:
 245                 tp->t_flags =
 246                  (ttcompatgetflags(tp) & 0xffff0000UL)
 247                    | (tp->t_flags & 0xffff);
 248                 *(int *)data = tp->t_flags>>16;
 249                 if (ttydebug)
 250                         printf("CLGET: returning %x\n", *(int *)data);
 251                 break;
 252
 253         case OTIOCGETD:
 254                 *(int *)data = tp->t_line ? tp->t_line : 2;
 255                 break;
 256
 257         case OTIOCSETD: {
 258                 int ldisczero = 0;
 259
 260                 return (ttioctl(tp, TIOCSETD,
 261                         *(int *)data == 2 ? (caddr_t)&ldisczero : data, flag));
 262             }
 263
 264         case OTIOCCONS:
 265                 *(int *)data = 1;
 266                 return (ttioctl(tp, TIOCCONS, data, flag));
 267
 268         default:
 269                 return (ENOIOCTL);
 270         }
 271         return (0);
 272 }
 273
 274 static int
 275 ttcompatgetflags(tp)
 276         struct tty *tp;
 277 {
 278         tcflag_t iflag  = tp->t_iflag;
 279         tcflag_t lflag  = tp->t_lflag;
 280         tcflag_t oflag  = tp->t_oflag;
 281         tcflag_t cflag  = tp->t_cflag;
 282         int flags = 0;
 283
 284         if (iflag&IXOFF)
 285                 flags |= TANDEM;
 286         if (iflag&ICRNL || oflag&ONLCR)
 287                 flags |= CRMOD;
 288         if ((cflag&CSIZE) == CS8) {
 289                 flags |= PASS8;
 290                 if (iflag&ISTRIP)
 291                         flags |= ANYP;
 292         }
 293         else if (cflag&PARENB) {
 294                 if (iflag&INPCK) {
 295                         if (cflag&PARODD)
 296                                 flags |= ODDP;
 297                         else
 298                                 flags |= EVENP;
 299                 } else
 300                         flags |= EVENP | ODDP;
 301         }
 302
 303         if ((lflag&ICANON) == 0) {
 304                 /* fudge */
 305                 if (iflag&(INPCK|ISTRIP|IXON) || lflag&(IEXTEN|ISIG)
 306                     || (cflag&(CSIZE|PARENB)) != CS8)
 307                         flags |= CBREAK;
 308                 else
 309                         flags |= RAW;
 310         }
 311         if (!(flags&RAW) && !(oflag&OPOST) && (cflag&(CSIZE|PARENB)) == CS8)
 312                 flags |= LITOUT;
 313         if (cflag&MDMBUF)
 314                 flags |= MDMBUF;
 315         if ((cflag&HUPCL) == 0)
 316                 flags |= NOHANG;
 317         if (oflag&OXTABS)
 318                 flags |= XTABS;
 319         if (lflag&ECHOE)
 320                 flags |= CRTERA|CRTBS;
 321         if (lflag&ECHOKE)
 322                 flags |= CRTKIL|CRTBS;
 323         if (lflag&ECHOPRT)
 324                 flags |= PRTERA;
 325         if (lflag&ECHOCTL)
 326                 flags |= CTLECH;
 327         if ((iflag&IXANY) == 0)
 328                 flags |= DECCTQ;
 329         flags |= lflag&(ECHO|TOSTOP|FLUSHO|PENDIN|NOFLSH);
 330         if (ttydebug)
 331                 printf("getflags: %x\n", flags);
 332         return (flags);
 333 }
 334
 335 static void
 336 ttcompatsetflags(tp, t)
 337         struct tty *tp;
 338         struct termios *t;
 339 {
 340         int flags = tp->t_flags;
 341         tcflag_t iflag  = t->c_iflag;
 342         tcflag_t oflag  = t->c_oflag;
 343         tcflag_t lflag  = t->c_lflag;
 344         tcflag_t cflag  = t->c_cflag;
 345
 346         if (flags & RAW) {
 347                 iflag = IGNBRK;
 348                 lflag &= ~(ECHOCTL|ISIG|ICANON|IEXTEN);
 349         } else {
 350                 iflag &= ~(PARMRK|IGNPAR|IGNCR|INLCR);
 351                 iflag |= BRKINT|IXON|IMAXBEL;
 352                 lflag |= ISIG|IEXTEN|ECHOCTL;   /* XXX was echoctl on ? */
 353                 if (flags & XTABS)
 354                         oflag |= OXTABS;
 355                 else
 356                         oflag &= ~OXTABS;
 357                 if (flags & CBREAK)
 358                         lflag &= ~ICANON;
 359                 else
 360                         lflag |= ICANON;
 361                 if (flags&CRMOD) {
 362                         iflag |= ICRNL;
 363                         oflag |= ONLCR;
 364                 } else {
 365                         iflag &= ~ICRNL;
 366                         oflag &= ~ONLCR;
 367                 }
 368         }
 369         if (flags&ECHO)
 370                 lflag |= ECHO;
 371         else
 372                 lflag &= ~ECHO;
 373
 374         cflag &= ~(CSIZE|PARENB);
 375         if (flags&(RAW|LITOUT|PASS8)) {
 376                 cflag |= CS8;
 377                 if (!(flags&(RAW|PASS8))
 378                     || (flags&(RAW|PASS8|ANYP)) == (PASS8|ANYP))
 379                         iflag |= ISTRIP;
 380                 else
 381                         iflag &= ~ISTRIP;
 382                 if (flags&(RAW|LITOUT))
 383                         oflag &= ~OPOST;
 384                 else
 385                         oflag |= OPOST;
 386         } else {
 387                 cflag |= CS7|PARENB;
 388                 iflag |= ISTRIP;
 389                 oflag |= OPOST;
 390         }
 391         /* XXX don't set INPCK if RAW or PASS8? */
 392         if ((flags&(EVENP|ODDP)) == EVENP) {
 393                 iflag |= INPCK;
 394                 cflag &= ~PARODD;
 395         } else if ((flags&(EVENP|ODDP)) == ODDP) {
 396                 iflag |= INPCK;
 397                 cflag |= PARODD;
 398         } else
 399                 iflag &= ~INPCK;
 400         if (flags&TANDEM)
 401                 iflag |= IXOFF;
 402         else
 403                 iflag &= ~IXOFF;
 404         if ((flags&DECCTQ) == 0)
 405                 iflag |= IXANY;
 406         else
 407                 iflag &= ~IXANY;
 408         t->c_iflag = iflag;
 409         t->c_oflag = oflag;
 410         t->c_lflag = lflag;
 411         t->c_cflag = cflag;
 412 }
 413
 414 static void
 415 ttcompatsetlflags(tp, t)
 416         struct tty *tp;
 417         struct termios *t;
 418 {
 419         int flags = tp->t_flags;
 420         tcflag_t iflag  = t->c_iflag;
 421         tcflag_t oflag  = t->c_oflag;
 422         tcflag_t lflag  = t->c_lflag;
 423         tcflag_t cflag  = t->c_cflag;
 424
 425         iflag &= ~(PARMRK|IGNPAR|IGNCR|INLCR);
 426         if (flags&CRTERA)
 427                 lflag |= ECHOE;
 428         else
 429                 lflag &= ~ECHOE;
 430         if (flags&CRTKIL)
 431                 lflag |= ECHOKE;
 432         else
 433                 lflag &= ~ECHOKE;
 434         if (flags&PRTERA)
 435                 lflag |= ECHOPRT;
 436         else
 437                 lflag &= ~ECHOPRT;
 438         if (flags&CTLECH)
 439                 lflag |= ECHOCTL;
 440         else
 441                 lflag &= ~ECHOCTL;
 442         if (flags&TANDEM)
 443                 iflag |= IXOFF;
 444         else
 445                 iflag &= ~IXOFF;
 446         if ((flags&DECCTQ) == 0)
 447                 iflag |= IXANY;
 448         else
 449                 iflag &= ~IXANY;
 450         if (flags & MDMBUF)
 451                 cflag |= MDMBUF;
 452         else
 453                 cflag &= ~MDMBUF;
 454         if (flags&NOHANG)
 455                 cflag &= ~HUPCL;
 456         else
 457                 cflag |= HUPCL;
 458         lflag &= ~(TOSTOP|FLUSHO|PENDIN|NOFLSH);
 459         lflag |= flags&(TOSTOP|FLUSHO|PENDIN|NOFLSH);
 460
 461         /*
 462          * The next if-else statement is copied from above so don't bother
 463          * checking it separately.  We could avoid fiddlling with the
 464          * character size if the mode is already RAW or if neither the
 465          * LITOUT bit or the PASS8 bit is being changed, but the delta of
 466          * the change is not available here and skipping the RAW case would
 467          * make the code different from above.
 468          */
 469         cflag &= ~(CSIZE|PARENB);
 470         if (flags&(RAW|LITOUT|PASS8)) {
 471                 cflag |= CS8;
 472                 if (!(flags&(RAW|PASS8))
 473                     || (flags&(RAW|PASS8|ANYP)) == (PASS8|ANYP))
 474                         iflag |= ISTRIP;
 475                 else
 476                         iflag &= ~ISTRIP;
 477                 if (flags&(RAW|LITOUT))
 478                         oflag &= ~OPOST;
 479                 else
 480                         oflag |= OPOST;
 481         } else {
 482                 cflag |= CS7|PARENB;
 483                 iflag |= ISTRIP;
 484                 oflag |= OPOST;
 485         }
 486         t->c_iflag = iflag;
 487         t->c_oflag = oflag;
 488         t->c_lflag = lflag;
 489         t->c_cflag = cflag;
 490 }
 491 #endif  /* COMPAT_43 || COMPAT_SUNOS */