usr.bin/tset/map.c

   1 /*-
   2  * Copyright (c) 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  * @(#)map.c    8.1 (Berkeley) 6/9/93
  34  * $FreeBSD: src/usr.bin/tset/map.c,v 1.7 1999/08/30 08:27:30 peter Exp $
  35  * $DragonFly: src/usr.bin/tset/map.c,v 1.5 2004/08/30 18:06:50 eirikn Exp $
  36  */
  37
  38 #include <sys/types.h>
  39 #include <err.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <termios.h>
  43 #include "extern.h"
  44
  45 extern speed_t Ospeed;
  46 speed_t tset_baudrate(char *);
  47
  48 /* Baud rate conditionals for mapping. */
  49 #define GT              0x01
  50 #define EQ              0x02
  51 #define LT              0x04
  52 #define NOT             0x08
  53 #define GE              (GT | EQ)
  54 #define LE              (LT | EQ)
  55
  56 typedef struct map {
  57         struct map *next;       /* Linked list of maps. */
  58         char *porttype;         /* Port type, or "" for any. */
  59         char *type;             /* Terminal type to select. */
  60         int conditional;        /* Baud rate conditionals bitmask. */
  61         speed_t speed;          /* Baud rate to compare against. */
  62 } MAP;
  63
  64 MAP *cur, *maplist;
  65
  66 /*
  67  * Syntax for -m:
  68  * [port-type][test baudrate]:terminal-type
  69  * The baud rate tests are: >, <, @, =, !
  70  */
  71 void
  72 add_mapping(const char *port, char *arg)
  73 {
  74         MAP *mapp;
  75         char *copy, *p, *termp;
  76
  77         copy = strdup(arg);
  78         mapp = malloc((u_int)sizeof(MAP));
  79         if (copy == NULL || mapp == NULL)
  80                 errx(1, "malloc");
  81         mapp->next = NULL;
  82         if (maplist == NULL)
  83                 cur = maplist = mapp;
  84         else {
  85                 cur->next = mapp;
  86                 cur =  mapp;
  87         }
  88
  89         mapp->porttype = arg;
  90         mapp->conditional = 0;
  91
  92         arg = strpbrk(arg, "><@=!:");
  93
  94         if (arg == NULL) {                      /* [?]term */
  95                 mapp->type = mapp->porttype;
  96                 mapp->porttype = NULL;
  97                 goto done;
  98         }
  99
 100         if (arg == mapp->porttype)              /* [><@=! baud]:term */
 101                 termp = mapp->porttype = NULL;
 102         else
 103                 termp = arg;
 104
 105         for (;; ++arg)                          /* Optional conditionals. */
 106                 switch(*arg) {
 107                 case '<':
 108                         if (mapp->conditional & GT)
 109                                 goto badmopt;
 110                         mapp->conditional |= LT;
 111                         break;
 112                 case '>':
 113                         if (mapp->conditional & LT)
 114                                 goto badmopt;
 115                         mapp->conditional |= GT;
 116                         break;
 117                 case '@':
 118                 case '=':                       /* Not documented. */
 119                         mapp->conditional |= EQ;
 120                         break;
 121                 case '!':
 122                         mapp->conditional |= NOT;
 123                         break;
 124                 default:
 125                         goto next;
 126                 }
 127
 128 next:   if (*arg == ':') {
 129                 if (mapp->conditional)
 130                         goto badmopt;
 131                 ++arg;
 132         } else {                                /* Optional baudrate. */
 133                 arg = strchr(p = arg, ':');
 134                 if (arg == NULL)
 135                         goto badmopt;
 136                 *arg++ = '\0';
 137                 mapp->speed = tset_baudrate(p);
 138         }
 139
 140         if (*arg == '\0')                       /* Non-optional type. */
 141                 goto badmopt;
 142
 143         mapp->type = arg;
 144
 145         /* Terminate porttype, if specified. */
 146         if (termp != NULL)
 147                 *termp = '\0';
 148
 149         /* If a NOT conditional, reverse the test. */
 150         if (mapp->conditional & NOT)
 151                 mapp->conditional = ~mapp->conditional & (EQ | GT | LT);
 152
 153         /* If user specified a port with an option flag, set it. */
 154 done:   if (port) {
 155                 if (mapp->porttype)
 156 badmopt:                errx(1, "illegal -m option format: %s", copy);
 157                 mapp->porttype = strdup(port);
 158         }
 159
 160 #ifdef MAPDEBUG
 161         (void)printf("port: %s\n", mapp->porttype ? mapp->porttype : "ANY");
 162         (void)printf("type: %s\n", mapp->type);
 163         (void)printf("conditional: ");
 164         p = "";
 165         if (mapp->conditional & GT) {
 166                 (void)printf("GT");
 167                 p = "/";
 168         }
 169         if (mapp->conditional & EQ) {
 170                 (void)printf("%sEQ", p);
 171                 p = "/";
 172         }
 173         if (mapp->conditional & LT)
 174                 (void)printf("%sLT", p);
 175         (void)printf("\nspeed: %d\n", mapp->speed);
 176 #endif
 177 }
 178
 179 /*
 180  * Return the type of terminal to use for a port of type 'type', as specified
 181  * by the first applicable mapping in 'map'.  If no mappings apply, return
 182  * 'type'.
 183  */
 184 const char *
 185 mapped(const char *type)
 186 {
 187         MAP *mapp;
 188         int match;
 189
 190         match = 0;
 191         for (mapp = maplist; mapp; mapp = mapp->next)
 192                 if (mapp->porttype == NULL || !strcmp(mapp->porttype, type)) {
 193                         switch (mapp->conditional) {
 194                         case 0:                 /* No test specified. */
 195                                 match = 1;
 196                                 break;
 197                         case EQ:
 198                                 match = (Ospeed == mapp->speed);
 199                                 break;
 200                         case GE:
 201                                 match = (Ospeed >= mapp->speed);
 202                                 break;
 203                         case GT:
 204                                 match = (Ospeed > mapp->speed);
 205                                 break;
 206                         case LE:
 207                                 match = (Ospeed <= mapp->speed);
 208                                 break;
 209                         case LT:
 210                                 match = (Ospeed < mapp->speed);
 211                                 break;
 212                         }
 213                         if (match)
 214                                 return (mapp->type);
 215                 }
 216         /* No match found; return given type. */
 217         return (type);
 218 }
 219
 220 typedef struct speeds {
 221         const char *string;
 222         speed_t speed;
 223 } SPEEDS;
 224
 225 SPEEDS speeds[] = {
 226         { "0",          B0 },
 227         { "134.5",      B134 },
 228         { "exta",       B19200 },
 229         { "extb",       B38400 },
 230         { NULL,         0 }
 231 };
 232
 233 speed_t
 234 tset_baudrate(char *rate)
 235 {
 236         SPEEDS *sp;
 237         speed_t speed;
 238
 239         /* The baudrate number can be preceded by a 'B', which is ignored. */
 240         if (*rate == 'B')
 241                 ++rate;
 242
 243         for (sp = speeds; sp->string; ++sp)
 244                 if (!strcasecmp(rate, sp->string))
 245                         return (sp->speed);
 246         speed = atol(rate);
 247         if (speed == 0)
 248                 errx(1, "unknown baud rate %s", rate);
 249         return speed;
 250 }