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: src/sys/kern/tty_compat.c,v 1.19.4.1 1999/09/05 08:15:26 peter Exp $
   35  */
   36 
   37 /*
   38  * mapping routines for old line discipline (yuck)
   39  */
   40 #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
   41 
   42 #include <sys/param.h>
   43 #include <sys/systm.h>
   44 #include <sys/ioctl.h>
   45 #include <sys/proc.h>
   46 #include <sys/tty.h>
   47 #include <sys/termios.h>
   48 #include <sys/file.h>
   49 #include <sys/conf.h>
   50 #include <sys/kernel.h>
   51 #include <sys/sysctl.h>
   52 #include <sys/syslog.h>
   53 
   54 static int ttcompatgetflags     __P((struct tty *tp));
   55 static void ttcompatsetflags    __P((struct tty *tp, struct termios *t));
   56 static void ttcompatsetlflags   __P((struct tty *tp, struct termios *t));
   57 static int ttcompatspeedtab     __P((int speed, struct speedtab *table));
   58 
   59 static int ttydebug = 0;
   60 SYSCTL_INT(_debug, OID_AUTO, ttydebug, CTLFLAG_RW, &ttydebug, 0, "");
   61 
   62 static struct speedtab compatspeeds[] = {
   63 #define MAX_SPEED       17
   64         { 115200, 17 },
   65         { 57600, 16 },
   66         { 38400, 15 },
   67         { 19200, 14 },
   68         { 9600, 13 },
   69         { 4800, 12 },
   70         { 2400, 11 },
   71         { 1800, 10 },
   72         { 1200, 9 },
   73         { 600,  8 },
   74         { 300,  7 },
   75         { 200,  6 },
   76         { 150,  5 },
   77         { 134,  4 },
   78         { 110,  3 },
   79         { 75,   2 },
   80         { 50,   1 },
   81         { 0,    0 },
   82         { -1,   -1 },
   83 };
   84 static int compatspcodes[] = {
   85         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
   86         1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200,
   87 };
   88 
   89 static int
   90 ttcompatspeedtab(speed, table)
   91         int speed;
   92         register struct speedtab *table;
   93 {
   94         if (speed == 0)
   95                 return (0); /* hangup */
   96         for ( ; table->sp_speed > 0; table++)
   97                 if (table->sp_speed <= speed) /* nearest one, rounded down */
   98                         return (table->sp_code);
   99         return (1); /* 50, min and not hangup */
  100 }
  101 
  102 int
  103 ttsetcompat(tp, com, data, term)
  104         register struct tty *tp;
  105         int *com;
  106         caddr_t data;
  107         struct termios *term;
  108 {
  109         switch (*com) {
  110         case TIOCSETP:
  111         case TIOCSETN: {
  112                 register struct sgttyb *sg = (struct sgttyb *)data;
  113                 int speed;
  114 
  115                 if ((speed = sg->sg_ispeed) > MAX_SPEED || speed < 0)
  116                         return(EINVAL);
  117                 else if (speed != ttcompatspeedtab(tp->t_ispeed, compatspeeds))
  118                         term->c_ispeed = compatspcodes[speed];
  119                 else
  120                         term->c_ispeed = tp->t_ispeed;
  121                 if ((speed = sg->sg_ospeed) > MAX_SPEED || speed < 0)
  122                         return(EINVAL);
  123                 else if (speed != ttcompatspeedtab(tp->t_ospeed, compatspeeds))
  124                         term->c_ospeed = compatspcodes[speed];
  125                 else
  126                         term->c_ospeed = tp->t_ospeed;
  127                 term->c_cc[VERASE] = sg->sg_erase;
  128                 term->c_cc[VKILL] = sg->sg_kill;
  129                 tp->t_flags = (tp->t_flags&0xffff0000) | (sg->sg_flags&0xffff);
  130                 ttcompatsetflags(tp, term);
  131                 *com = (*com == TIOCSETP) ? TIOCSETAF : TIOCSETA;
  132                 break;
  133         }
  134         case TIOCSETC: {
  135                 struct tchars *tc = (struct tchars *)data;
  136                 register cc_t *cc;
  137 
  138                 cc = term->c_cc;
  139                 cc[VINTR] = tc->t_intrc;
  140                 cc[VQUIT] = tc->t_quitc;
  141                 cc[VSTART] = tc->t_startc;
  142                 cc[VSTOP] = tc->t_stopc;
  143                 cc[VEOF] = tc->t_eofc;
  144                 cc[VEOL] = tc->t_brkc;
  145                 if (tc->t_brkc == -1)
  146                         cc[VEOL2] = _POSIX_VDISABLE;
  147                 *com = TIOCSETA;
  148                 break;
  149         }
  150         case TIOCSLTC: {
  151                 struct ltchars *ltc = (struct ltchars *)data;
  152                 register cc_t *cc;
  153 
  154                 cc = term->c_cc;
  155                 cc[VSUSP] = ltc->t_suspc;
  156                 cc[VDSUSP] = ltc->t_dsuspc;
  157                 cc[VREPRINT] = ltc->t_rprntc;
  158                 cc[VDISCARD] = ltc->t_flushc;
  159                 cc[VWERASE] = ltc->t_werasc;
  160                 cc[VLNEXT] = ltc->t_lnextc;
  161                 *com = TIOCSETA;
  162                 break;
  163         }
  164         case TIOCLBIS:
  165         case TIOCLBIC:
  166         case TIOCLSET:
  167                 if (*com == TIOCLSET)
  168                         tp->t_flags = (tp->t_flags&0xffff) | *(int *)data<<16;
  169                 else {
  170                         tp->t_flags =
  171                          (ttcompatgetflags(tp)&0xffff0000)|(tp->t_flags&0xffff);
  172                         if (*com == TIOCLBIS)
  173                                 tp->t_flags |= *(int *)data<<16;
  174                         else
  175                                 tp->t_flags &= ~(*(int *)data<<16);
  176                 }
  177                 ttcompatsetlflags(tp, term);
  178                 *com = TIOCSETA;
  179                 break;
  180         }
  181         return 0;
  182 }
  183 
  184 /*ARGSUSED*/
  185 int
  186 ttcompat(tp, com, data, flag)
  187         register struct tty *tp;
  188         int com;
  189         caddr_t data;
  190         int flag;
  191 {
  192         switch (com) {
  193         case TIOCSETP:
  194         case TIOCSETN:
  195         case TIOCSETC:
  196         case TIOCSLTC:
  197         case TIOCLBIS:
  198         case TIOCLBIC:
  199         case TIOCLSET: {
  200                 struct termios term;
  201                 int error;
  202 
  203                 term = tp->t_termios;
  204                 if ((error = ttsetcompat(tp, &com, data, &term)) != 0)
  205                         return error;
  206                 return ttioctl(tp, com, &term, flag);
  207         }
  208         case TIOCGETP: {
  209                 register struct sgttyb *sg = (struct sgttyb *)data;
  210                 register cc_t *cc = tp->t_cc;
  211 
  212                 sg->sg_ospeed = ttcompatspeedtab(tp->t_ospeed, compatspeeds);
  213                 if (tp->t_ispeed == 0)
  214                         sg->sg_ispeed = sg->sg_ospeed;
  215                 else
  216                         sg->sg_ispeed = ttcompatspeedtab(tp->t_ispeed, compatspeeds);
  217                 sg->sg_erase = cc[VERASE];
  218                 sg->sg_kill = cc[VKILL];
  219                 sg->sg_flags = tp->t_flags = ttcompatgetflags(tp);
  220                 break;
  221         }
  222         case TIOCGETC: {
  223                 struct tchars *tc = (struct tchars *)data;
  224                 register cc_t *cc = tp->t_cc;
  225 
  226                 tc->t_intrc = cc[VINTR];
  227                 tc->t_quitc = cc[VQUIT];
  228                 tc->t_startc = cc[VSTART];
  229                 tc->t_stopc = cc[VSTOP];
  230                 tc->t_eofc = cc[VEOF];
  231                 tc->t_brkc = cc[VEOL];
  232                 break;
  233         }
  234         case TIOCGLTC: {
  235                 struct ltchars *ltc = (struct ltchars *)data;
  236                 register cc_t *cc = tp->t_cc;
  237 
  238                 ltc->t_suspc = cc[VSUSP];
  239                 ltc->t_dsuspc = cc[VDSUSP];
  240                 ltc->t_rprntc = cc[VREPRINT];
  241                 ltc->t_flushc = cc[VDISCARD];
  242                 ltc->t_werasc = cc[VWERASE];
  243                 ltc->t_lnextc = cc[VLNEXT];
  244                 break;
  245         }
  246         case TIOCLGET:
  247                 tp->t_flags =
  248                  (ttcompatgetflags(tp) & 0xffff0000UL)
  249                    | (tp->t_flags & 0xffff);
  250                 *(int *)data = tp->t_flags>>16;
  251                 if (ttydebug)
  252                         printf("CLGET: returning %x\n", *(int *)data);
  253                 break;
  254 
  255         case OTIOCGETD:
  256                 *(int *)data = tp->t_line ? tp->t_line : 2;
  257                 break;
  258 
  259         case OTIOCSETD: {
  260                 int ldisczero = 0;
  261 
  262                 return (ttioctl(tp, TIOCSETD,
  263                         *(int *)data == 2 ? (caddr_t)&ldisczero : data, flag));
  264             }
  265 
  266         case OTIOCCONS:
  267                 *(int *)data = 1;
  268                 return (ttioctl(tp, TIOCCONS, data, flag));
  269 
  270         default:
  271                 return (-1);
  272         }
  273         return (0);
  274 }
  275 
  276 static int
  277 ttcompatgetflags(tp)
  278         register struct tty *tp;
  279 {
  280         register tcflag_t iflag = tp->t_iflag;
  281         register tcflag_t lflag = tp->t_lflag;
  282         register tcflag_t oflag = tp->t_oflag;
  283         register tcflag_t cflag = tp->t_cflag;
  284         register flags = 0;
  285 
  286         if (iflag&IXOFF)
  287                 flags |= TANDEM;
  288         if (iflag&ICRNL || oflag&ONLCR)
  289                 flags |= CRMOD;
  290         if ((cflag&CSIZE) == CS8) {
  291                 flags |= PASS8;
  292                 if (iflag&ISTRIP)
  293                         flags |= ANYP;
  294         }
  295         else if (cflag&PARENB) {
  296                 if (iflag&INPCK) {
  297                         if (cflag&PARODD)
  298                                 flags |= ODDP;
  299                         else
  300                                 flags |= EVENP;
  301                 } else
  302                         flags |= EVENP | ODDP;
  303         }
  304 
  305         if ((lflag&ICANON) == 0) {
  306                 /* fudge */
  307                 if (iflag&(INPCK|ISTRIP|IXON) || lflag&(IEXTEN|ISIG)
  308                     || cflag&(CSIZE|PARENB) != CS8)
  309                         flags |= CBREAK;
  310                 else
  311                         flags |= RAW;
  312         }
  313         if (!(flags&RAW) && !(oflag&OPOST) && cflag&(CSIZE|PARENB) == CS8)
  314                 flags |= LITOUT;
  315         if (cflag&MDMBUF)
  316                 flags |= MDMBUF;
  317         if ((cflag&HUPCL) == 0)
  318                 flags |= NOHANG;
  319         if (oflag&OXTABS)
  320                 flags |= XTABS;
  321         if (lflag&ECHOE)
  322                 flags |= CRTERA|CRTBS;
  323         if (lflag&ECHOKE)
  324                 flags |= CRTKIL|CRTBS;
  325         if (lflag&ECHOPRT)
  326                 flags |= PRTERA;
  327         if (lflag&ECHOCTL)
  328                 flags |= CTLECH;
  329         if ((iflag&IXANY) == 0)
  330                 flags |= DECCTQ;
  331         flags |= lflag&(ECHO|TOSTOP|FLUSHO|PENDIN|NOFLSH);
  332         if (ttydebug)
  333                 printf("getflags: %x\n", flags);
  334         return (flags);
  335 }
  336 
  337 static void
  338 ttcompatsetflags(tp, t)
  339         register struct tty *tp;
  340         register struct termios *t;
  341 {
  342         register flags = tp->t_flags;
  343         register tcflag_t iflag = t->c_iflag;
  344         register tcflag_t oflag = t->c_oflag;
  345         register tcflag_t lflag = t->c_lflag;
  346         register tcflag_t cflag = t->c_cflag;
  347 
  348         if (flags & RAW) {
  349                 iflag = IGNBRK;
  350                 lflag &= ~(ECHOCTL|ISIG|ICANON|IEXTEN);
  351         } else {
  352                 iflag &= ~(PARMRK|IGNPAR|IGNCR|INLCR);
  353                 iflag |= BRKINT|IXON|IMAXBEL;
  354                 lflag |= ISIG|IEXTEN|ECHOCTL;   /* XXX was echoctl on ? */
  355                 if (flags & XTABS)
  356                         oflag |= OXTABS;
  357                 else
  358                         oflag &= ~OXTABS;
  359                 if (flags & CBREAK)
  360                         lflag &= ~ICANON;
  361                 else
  362                         lflag |= ICANON;
  363                 if (flags&CRMOD) {
  364                         iflag |= ICRNL;
  365                         oflag |= ONLCR;
  366                 } else {
  367                         iflag &= ~ICRNL;
  368                         oflag &= ~ONLCR;
  369                 }
  370         }
  371         if (flags&ECHO)
  372                 lflag |= ECHO;
  373         else
  374                 lflag &= ~ECHO;
  375 
  376         cflag &= ~(CSIZE|PARENB);
  377         if (flags&(RAW|LITOUT|PASS8)) {
  378                 cflag |= CS8;
  379                 if (!(flags&(RAW|PASS8))
  380                     || (flags&(RAW|PASS8|ANYP)) == (PASS8|ANYP))
  381                         iflag |= ISTRIP;
  382                 else
  383                         iflag &= ~ISTRIP;
  384                 if (flags&(RAW|LITOUT))
  385                         oflag &= ~OPOST;
  386                 else
  387                         oflag |= OPOST;
  388         } else {
  389                 cflag |= CS7|PARENB;
  390                 iflag |= ISTRIP;
  391                 oflag |= OPOST;
  392         }
  393         /* XXX don't set INPCK if RAW or PASS8? */
  394         if ((flags&(EVENP|ODDP)) == EVENP) {
  395                 iflag |= INPCK;
  396                 cflag &= ~PARODD;
  397         } else if ((flags&(EVENP|ODDP)) == ODDP) {
  398                 iflag |= INPCK;
  399                 cflag |= PARODD;
  400         } else
  401                 iflag &= ~INPCK;
  402         if (flags&TANDEM)
  403                 iflag |= IXOFF;
  404         else
  405                 iflag &= ~IXOFF;
  406         if ((flags&DECCTQ) == 0)
  407                 iflag |= IXANY;
  408         else
  409                 iflag &= ~IXANY;
  410         t->c_iflag = iflag;
  411         t->c_oflag = oflag;
  412         t->c_lflag = lflag;
  413         t->c_cflag = cflag;
  414 }
  415 
  416 static void
  417 ttcompatsetlflags(tp, t)
  418         register struct tty *tp;
  419         register struct termios *t;
  420 {
  421         register flags = tp->t_flags;
  422         register tcflag_t iflag = t->c_iflag;
  423         register tcflag_t oflag = t->c_oflag;
  424         register tcflag_t lflag = t->c_lflag;
  425         register tcflag_t cflag = t->c_cflag;
  426 
  427         iflag &= ~(PARMRK|IGNPAR|IGNCR|INLCR);
  428         if (flags&CRTERA)
  429                 lflag |= ECHOE;
  430         else
  431                 lflag &= ~ECHOE;
  432         if (flags&CRTKIL)
  433                 lflag |= ECHOKE;
  434         else
  435                 lflag &= ~ECHOKE;
  436         if (flags&PRTERA)
  437                 lflag |= ECHOPRT;
  438         else
  439                 lflag &= ~ECHOPRT;
  440         if (flags&CTLECH)
  441                 lflag |= ECHOCTL;
  442         else
  443                 lflag &= ~ECHOCTL;
  444         if (flags&TANDEM)
  445                 iflag |= IXOFF;
  446         else
  447                 iflag &= ~IXOFF;
  448         if ((flags&DECCTQ) == 0)
  449                 iflag |= IXANY;
  450         else
  451                 iflag &= ~IXANY;
  452         if (flags & MDMBUF)
  453                 cflag |= MDMBUF;
  454         else
  455                 cflag &= ~MDMBUF;
  456         if (flags&NOHANG)
  457                 cflag &= ~HUPCL;
  458         else
  459                 cflag |= HUPCL;
  460         lflag &= ~(TOSTOP|FLUSHO|PENDIN|NOFLSH);
  461         lflag |= flags&(TOSTOP|FLUSHO|PENDIN|NOFLSH);
  462 
  463         /*
  464          * The next if-else statement is copied from above so don't bother
  465          * checking it separately.  We could avoid fiddlling with the
  466          * character size if the mode is already RAW or if neither the
  467          * LITOUT bit or the PASS8 bit is being changed, but the delta of
  468          * the change is not available here and skipping the RAW case would
  469          * make the code different from above.
  470          */
  471         cflag &= ~(CSIZE|PARENB);
  472         if (flags&(RAW|LITOUT|PASS8)) {
  473                 cflag |= CS8;
  474                 if (!(flags&(RAW|PASS8))
  475                     || (flags&(RAW|PASS8|ANYP)) == (PASS8|ANYP))
  476                         iflag |= ISTRIP;
  477                 else
  478                         iflag &= ~ISTRIP;
  479                 if (flags&(RAW|LITOUT))
  480                         oflag &= ~OPOST;
  481                 else
  482                         oflag |= OPOST;
  483         } else {
  484                 cflag |= CS7|PARENB;
  485                 iflag |= ISTRIP;
  486                 oflag |= OPOST;
  487         }
  488         t->c_iflag = iflag;
  489         t->c_oflag = oflag;
  490         t->c_lflag = lflag;
  491         t->c_cflag = cflag;
  492 }
  493 #endif  /* COMPAT_43 || COMPAT_SUNOS */

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