The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/kern/tty_compat.c

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

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