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 1.6 2006/12/23 23:47:54 swildner 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(int speed, struct speedtab *table)
  89 {
  90         if (speed == 0)
  91                 return (0); /* hangup */
  92         for ( ; table->sp_speed > 0; table++)
  93                 if (table->sp_speed <= speed) /* nearest one, rounded down */
  94                         return (table->sp_code);
  95         return (1); /* 50, min and not hangup */
  96 }
  97
  98 int
  99 ttsetcompat(struct tty *tp, u_long *com, caddr_t data, struct termios *term)
 100 {
 101         switch (*com) {
 102         case TIOCSETP:
 103         case TIOCSETN: {
 104                 struct sgttyb *sg = (struct sgttyb *)data;
 105                 int speed;
 106
 107                 if ((speed = sg->sg_ispeed) > MAX_SPEED || speed < 0)
 108                         return(EINVAL);
 109                 else if (speed != ttcompatspeedtab(tp->t_ispeed, compatspeeds))
 110                         term->c_ispeed = compatspcodes[speed];
 111                 else
 112                         term->c_ispeed = tp->t_ispeed;
 113                 if ((speed = sg->sg_ospeed) > MAX_SPEED || speed < 0)
 114                         return(EINVAL);
 115                 else if (speed != ttcompatspeedtab(tp->t_ospeed, compatspeeds))
 116                         term->c_ospeed = compatspcodes[speed];
 117                 else
 118                         term->c_ospeed = tp->t_ospeed;
 119                 term->c_cc[VERASE] = sg->sg_erase;
 120                 term->c_cc[VKILL] = sg->sg_kill;
 121                 tp->t_flags = (tp->t_flags&0xffff0000) | (sg->sg_flags&0xffff);
 122                 ttcompatsetflags(tp, term);
 123                 *com = (*com == TIOCSETP) ? TIOCSETAF : TIOCSETA;
 124                 break;
 125         }
 126         case TIOCSETC: {
 127                 struct tchars *tc = (struct tchars *)data;
 128                 cc_t *cc;
 129
 130                 cc = term->c_cc;
 131                 cc[VINTR] = tc->t_intrc;
 132                 cc[VQUIT] = tc->t_quitc;
 133                 cc[VSTART] = tc->t_startc;
 134                 cc[VSTOP] = tc->t_stopc;
 135                 cc[VEOF] = tc->t_eofc;
 136                 cc[VEOL] = tc->t_brkc;
 137                 if (tc->t_brkc == -1)
 138                         cc[VEOL2] = _POSIX_VDISABLE;
 139                 *com = TIOCSETA;
 140                 break;
 141         }
 142         case TIOCSLTC: {
 143                 struct ltchars *ltc = (struct ltchars *)data;
 144                 cc_t *cc;
 145
 146                 cc = term->c_cc;
 147                 cc[VSUSP] = ltc->t_suspc;
 148                 cc[VDSUSP] = ltc->t_dsuspc;
 149                 cc[VREPRINT] = ltc->t_rprntc;
 150                 cc[VDISCARD] = ltc->t_flushc;
 151                 cc[VWERASE] = ltc->t_werasc;
 152                 cc[VLNEXT] = ltc->t_lnextc;
 153                 *com = TIOCSETA;
 154                 break;
 155         }
 156         case TIOCLBIS:
 157         case TIOCLBIC:
 158         case TIOCLSET:
 159                 if (*com == TIOCLSET)
 160                         tp->t_flags = (tp->t_flags&0xffff) | *(int *)data<<16;
 161                 else {
 162                         tp->t_flags =
 163                          (ttcompatgetflags(tp)&0xffff0000)|(tp->t_flags&0xffff);
 164                         if (*com == TIOCLBIS)
 165                                 tp->t_flags |= *(int *)data<<16;
 166                         else
 167                                 tp->t_flags &= ~(*(int *)data<<16);
 168                 }
 169                 ttcompatsetlflags(tp, term);
 170                 *com = TIOCSETA;
 171                 break;
 172         }
 173         return 0;
 174 }
 175
 176 /*ARGSUSED*/
 177 int
 178 ttcompat(struct tty *tp, u_long com, caddr_t data, int flag)
 179 {
 180         switch (com) {
 181         case TIOCSETP:
 182         case TIOCSETN:
 183         case TIOCSETC:
 184         case TIOCSLTC:
 185         case TIOCLBIS:
 186         case TIOCLBIC:
 187         case TIOCLSET: {
 188                 struct termios term;
 189                 int error;
 190
 191                 term = tp->t_termios;
 192                 if ((error = ttsetcompat(tp, &com, data, &term)) != 0)
 193                         return error;
 194                 return ttioctl(tp, com, &term, flag);
 195         }
 196         case TIOCGETP: {
 197                 struct sgttyb *sg = (struct sgttyb *)data;
 198                 cc_t *cc = tp->t_cc;
 199
 200                 sg->sg_ospeed = ttcompatspeedtab(tp->t_ospeed, compatspeeds);
 201                 if (tp->t_ispeed == 0)
 202                         sg->sg_ispeed = sg->sg_ospeed;
 203                 else
 204                         sg->sg_ispeed = ttcompatspeedtab(tp->t_ispeed, compatspeeds);
 205                 sg->sg_erase = cc[VERASE];
 206                 sg->sg_kill = cc[VKILL];
 207                 sg->sg_flags = tp->t_flags = ttcompatgetflags(tp);
 208                 break;
 209         }
 210         case TIOCGETC: {
 211                 struct tchars *tc = (struct tchars *)data;
 212                 cc_t *cc = tp->t_cc;
 213
 214                 tc->t_intrc = cc[VINTR];
 215                 tc->t_quitc = cc[VQUIT];
 216                 tc->t_startc = cc[VSTART];
 217                 tc->t_stopc = cc[VSTOP];
 218                 tc->t_eofc = cc[VEOF];
 219                 tc->t_brkc = cc[VEOL];
 220                 break;
 221         }
 222         case TIOCGLTC: {
 223                 struct ltchars *ltc = (struct ltchars *)data;
 224                 cc_t *cc = tp->t_cc;
 225
 226                 ltc->t_suspc = cc[VSUSP];
 227                 ltc->t_dsuspc = cc[VDSUSP];
 228                 ltc->t_rprntc = cc[VREPRINT];
 229                 ltc->t_flushc = cc[VDISCARD];
 230                 ltc->t_werasc = cc[VWERASE];
 231                 ltc->t_lnextc = cc[VLNEXT];
 232                 break;
 233         }
 234         case TIOCLGET:
 235                 tp->t_flags =
 236                  (ttcompatgetflags(tp) & 0xffff0000UL)
 237                    | (tp->t_flags & 0xffff);
 238                 *(int *)data = tp->t_flags>>16;
 239                 if (ttydebug)
 240                         kprintf("CLGET: returning %x\n", *(int *)data);
 241                 break;
 242
 243         case OTIOCGETD:
 244                 *(int *)data = tp->t_line ? tp->t_line : 2;
 245                 break;
 246
 247         case OTIOCSETD: {
 248                 int ldisczero = 0;
 249
 250                 return (ttioctl(tp, TIOCSETD,
 251                         *(int *)data == 2 ? (caddr_t)&ldisczero : data, flag));
 252             }
 253
 254         case OTIOCCONS:
 255                 *(int *)data = 1;
 256                 return (ttioctl(tp, TIOCCONS, data, flag));
 257
 258         default:
 259                 return (ENOIOCTL);
 260         }
 261         return (0);
 262 }
 263
 264 static int
 265 ttcompatgetflags(struct tty *tp)
 266 {
 267         tcflag_t iflag  = tp->t_iflag;
 268         tcflag_t lflag  = tp->t_lflag;
 269         tcflag_t oflag  = tp->t_oflag;
 270         tcflag_t cflag  = tp->t_cflag;
 271         int flags = 0;
 272
 273         if (iflag&IXOFF)
 274                 flags |= TANDEM;
 275         if (iflag&ICRNL || oflag&ONLCR)
 276                 flags |= CRMOD;
 277         if ((cflag&CSIZE) == CS8) {
 278                 flags |= PASS8;
 279                 if (iflag&ISTRIP)
 280                         flags |= ANYP;
 281         }
 282         else if (cflag&PARENB) {
 283                 if (iflag&INPCK) {
 284                         if (cflag&PARODD)
 285                                 flags |= ODDP;
 286                         else
 287                                 flags |= EVENP;
 288                 } else
 289                         flags |= EVENP | ODDP;
 290         }
 291
 292         if ((lflag&ICANON) == 0) {
 293                 /* fudge */
 294                 if (iflag&(INPCK|ISTRIP|IXON) || lflag&(IEXTEN|ISIG)
 295                     || (cflag&(CSIZE|PARENB)) != CS8)
 296                         flags |= CBREAK;
 297                 else
 298                         flags |= RAW;
 299         }
 300         if (!(flags&RAW) && !(oflag&OPOST) && (cflag&(CSIZE|PARENB)) == CS8)
 301                 flags |= LITOUT;
 302         if (cflag&MDMBUF)
 303                 flags |= MDMBUF;
 304         if ((cflag&HUPCL) == 0)
 305                 flags |= NOHANG;
 306         if (oflag&OXTABS)
 307                 flags |= XTABS;
 308         if (lflag&ECHOE)
 309                 flags |= CRTERA|CRTBS;
 310         if (lflag&ECHOKE)
 311                 flags |= CRTKIL|CRTBS;
 312         if (lflag&ECHOPRT)
 313                 flags |= PRTERA;
 314         if (lflag&ECHOCTL)
 315                 flags |= CTLECH;
 316         if ((iflag&IXANY) == 0)
 317                 flags |= DECCTQ;
 318         flags |= lflag&(ECHO|TOSTOP|FLUSHO|PENDIN|NOFLSH);
 319         if (ttydebug)
 320                 kprintf("getflags: %x\n", flags);
 321         return (flags);
 322 }
 323
 324 static void
 325 ttcompatsetflags(struct tty *tp, struct termios *t)
 326 {
 327         int flags = tp->t_flags;
 328         tcflag_t iflag  = t->c_iflag;
 329         tcflag_t oflag  = t->c_oflag;
 330         tcflag_t lflag  = t->c_lflag;
 331         tcflag_t cflag  = t->c_cflag;
 332
 333         if (flags & RAW) {
 334                 iflag = IGNBRK;
 335                 lflag &= ~(ECHOCTL|ISIG|ICANON|IEXTEN);
 336         } else {
 337                 iflag &= ~(PARMRK|IGNPAR|IGNCR|INLCR);
 338                 iflag |= BRKINT|IXON|IMAXBEL;
 339                 lflag |= ISIG|IEXTEN|ECHOCTL;   /* XXX was echoctl on ? */
 340                 if (flags & XTABS)
 341                         oflag |= OXTABS;
 342                 else
 343                         oflag &= ~OXTABS;
 344                 if (flags & CBREAK)
 345                         lflag &= ~ICANON;
 346                 else
 347                         lflag |= ICANON;
 348                 if (flags&CRMOD) {
 349                         iflag |= ICRNL;
 350                         oflag |= ONLCR;
 351                 } else {
 352                         iflag &= ~ICRNL;
 353                         oflag &= ~ONLCR;
 354                 }
 355         }
 356         if (flags&ECHO)
 357                 lflag |= ECHO;
 358         else
 359                 lflag &= ~ECHO;
 360
 361         cflag &= ~(CSIZE|PARENB);
 362         if (flags&(RAW|LITOUT|PASS8)) {
 363                 cflag |= CS8;
 364                 if (!(flags&(RAW|PASS8))
 365                     || (flags&(RAW|PASS8|ANYP)) == (PASS8|ANYP))
 366                         iflag |= ISTRIP;
 367                 else
 368                         iflag &= ~ISTRIP;
 369                 if (flags&(RAW|LITOUT))
 370                         oflag &= ~OPOST;
 371                 else
 372                         oflag |= OPOST;
 373         } else {
 374                 cflag |= CS7|PARENB;
 375                 iflag |= ISTRIP;
 376                 oflag |= OPOST;
 377         }
 378         /* XXX don't set INPCK if RAW or PASS8? */
 379         if ((flags&(EVENP|ODDP)) == EVENP) {
 380                 iflag |= INPCK;
 381                 cflag &= ~PARODD;
 382         } else if ((flags&(EVENP|ODDP)) == ODDP) {
 383                 iflag |= INPCK;
 384                 cflag |= PARODD;
 385         } else
 386                 iflag &= ~INPCK;
 387         if (flags&TANDEM)
 388                 iflag |= IXOFF;
 389         else
 390                 iflag &= ~IXOFF;
 391         if ((flags&DECCTQ) == 0)
 392                 iflag |= IXANY;
 393         else
 394                 iflag &= ~IXANY;
 395         t->c_iflag = iflag;
 396         t->c_oflag = oflag;
 397         t->c_lflag = lflag;
 398         t->c_cflag = cflag;
 399 }
 400
 401 static void
 402 ttcompatsetlflags(struct tty *tp, struct termios *t)
 403 {
 404         int flags = tp->t_flags;
 405         tcflag_t iflag  = t->c_iflag;
 406         tcflag_t oflag  = t->c_oflag;
 407         tcflag_t lflag  = t->c_lflag;
 408         tcflag_t cflag  = t->c_cflag;
 409
 410         iflag &= ~(PARMRK|IGNPAR|IGNCR|INLCR);
 411         if (flags&CRTERA)
 412                 lflag |= ECHOE;
 413         else
 414                 lflag &= ~ECHOE;
 415         if (flags&CRTKIL)
 416                 lflag |= ECHOKE;
 417         else
 418                 lflag &= ~ECHOKE;
 419         if (flags&PRTERA)
 420                 lflag |= ECHOPRT;
 421         else
 422                 lflag &= ~ECHOPRT;
 423         if (flags&CTLECH)
 424                 lflag |= ECHOCTL;
 425         else
 426                 lflag &= ~ECHOCTL;
 427         if (flags&TANDEM)
 428                 iflag |= IXOFF;
 429         else
 430                 iflag &= ~IXOFF;
 431         if ((flags&DECCTQ) == 0)
 432                 iflag |= IXANY;
 433         else
 434                 iflag &= ~IXANY;
 435         if (flags & MDMBUF)
 436                 cflag |= MDMBUF;
 437         else
 438                 cflag &= ~MDMBUF;
 439         if (flags&NOHANG)
 440                 cflag &= ~HUPCL;
 441         else
 442                 cflag |= HUPCL;
 443         lflag &= ~(TOSTOP|FLUSHO|PENDIN|NOFLSH);
 444         lflag |= flags&(TOSTOP|FLUSHO|PENDIN|NOFLSH);
 445
 446         /*
 447          * The next if-else statement is copied from above so don't bother
 448          * checking it separately.  We could avoid fiddlling with the
 449          * character size if the mode is already RAW or if neither the
 450          * LITOUT bit or the PASS8 bit is being changed, but the delta of
 451          * the change is not available here and skipping the RAW case would
 452          * make the code different from above.
 453          */
 454         cflag &= ~(CSIZE|PARENB);
 455         if (flags&(RAW|LITOUT|PASS8)) {
 456                 cflag |= CS8;
 457                 if (!(flags&(RAW|PASS8))
 458                     || (flags&(RAW|PASS8|ANYP)) == (PASS8|ANYP))
 459                         iflag |= ISTRIP;
 460                 else
 461                         iflag &= ~ISTRIP;
 462                 if (flags&(RAW|LITOUT))
 463                         oflag &= ~OPOST;
 464                 else
 465                         oflag |= OPOST;
 466         } else {
 467                 cflag |= CS7|PARENB;
 468                 iflag |= ISTRIP;
 469                 oflag |= OPOST;
 470         }
 471         t->c_iflag = iflag;
 472         t->c_oflag = oflag;
 473         t->c_lflag = lflag;
 474         t->c_cflag = cflag;
 475 }
 476 #endif  /* COMPAT_43 || COMPAT_SUNOS */