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