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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)map.c    8.1 (Berkeley) 6/9/93
  30  * $FreeBSD: src/usr.bin/tset/map.c,v 1.7 1999/08/30 08:27:30 peter Exp $
  31  * $DragonFly: src/usr.bin/tset/map.c,v 1.5 2004/08/30 18:06:50 eirikn Exp $
  32  */
  33
  34 #include <sys/types.h>
  35 #include <err.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <termios.h>
  39 #include "extern.h"
  40
  41 extern speed_t Ospeed;
  42 speed_t tset_baudrate(char *);
  43
  44 /* Baud rate conditionals for mapping. */
  45 #define GT              0x01
  46 #define EQ              0x02
  47 #define LT              0x04
  48 #define NOT             0x08
  49 #define GE              (GT | EQ)
  50 #define LE              (LT | EQ)
  51
  52 typedef struct map {
  53         struct map *next;       /* Linked list of maps. */
  54         char *porttype;         /* Port type, or "" for any. */
  55         char *type;             /* Terminal type to select. */
  56         int conditional;        /* Baud rate conditionals bitmask. */
  57         speed_t speed;          /* Baud rate to compare against. */
  58 } MAP;
  59
  60 MAP *cur, *maplist;
  61
  62 /*
  63  * Syntax for -m:
  64  * [port-type][test baudrate]:terminal-type
  65  * The baud rate tests are: >, <, @, =, !
  66  */
  67 void
  68 add_mapping(const char *port, char *arg)
  69 {
  70         MAP *mapp;
  71         char *copy, *p, *termp;
  72
  73         copy = strdup(arg);
  74         mapp = malloc((u_int)sizeof(MAP));
  75         if (copy == NULL || mapp == NULL)
  76                 errx(1, "malloc");
  77         mapp->next = NULL;
  78         if (maplist == NULL)
  79                 cur = maplist = mapp;
  80         else {
  81                 cur->next = mapp;
  82                 cur =  mapp;
  83         }
  84
  85         mapp->porttype = arg;
  86         mapp->conditional = 0;
  87
  88         arg = strpbrk(arg, "><@=!:");
  89
  90         if (arg == NULL) {                      /* [?]term */
  91                 mapp->type = mapp->porttype;
  92                 mapp->porttype = NULL;
  93                 goto done;
  94         }
  95
  96         if (arg == mapp->porttype)              /* [><@=! baud]:term */
  97                 termp = mapp->porttype = NULL;
  98         else
  99                 termp = arg;
 100
 101         for (;; ++arg)                          /* Optional conditionals. */
 102                 switch(*arg) {
 103                 case '<':
 104                         if (mapp->conditional & GT)
 105                                 goto badmopt;
 106                         mapp->conditional |= LT;
 107                         break;
 108                 case '>':
 109                         if (mapp->conditional & LT)
 110                                 goto badmopt;
 111                         mapp->conditional |= GT;
 112                         break;
 113                 case '@':
 114                 case '=':                       /* Not documented. */
 115                         mapp->conditional |= EQ;
 116                         break;
 117                 case '!':
 118                         mapp->conditional |= NOT;
 119                         break;
 120                 default:
 121                         goto next;
 122                 }
 123
 124 next:   if (*arg == ':') {
 125                 if (mapp->conditional)
 126                         goto badmopt;
 127                 ++arg;
 128         } else {                                /* Optional baudrate. */
 129                 arg = strchr(p = arg, ':');
 130                 if (arg == NULL)
 131                         goto badmopt;
 132                 *arg++ = '\0';
 133                 mapp->speed = tset_baudrate(p);
 134         }
 135
 136         if (*arg == '\0')                       /* Non-optional type. */
 137                 goto badmopt;
 138
 139         mapp->type = arg;
 140
 141         /* Terminate porttype, if specified. */
 142         if (termp != NULL)
 143                 *termp = '\0';
 144
 145         /* If a NOT conditional, reverse the test. */
 146         if (mapp->conditional & NOT)
 147                 mapp->conditional = ~mapp->conditional & (EQ | GT | LT);
 148
 149         /* If user specified a port with an option flag, set it. */
 150 done:   if (port) {
 151                 if (mapp->porttype)
 152 badmopt:                errx(1, "illegal -m option format: %s", copy);
 153                 mapp->porttype = strdup(port);
 154         }
 155
 156 #ifdef MAPDEBUG
 157         (void)printf("port: %s\n", mapp->porttype ? mapp->porttype : "ANY");
 158         (void)printf("type: %s\n", mapp->type);
 159         (void)printf("conditional: ");
 160         p = "";
 161         if (mapp->conditional & GT) {
 162                 (void)printf("GT");
 163                 p = "/";
 164         }
 165         if (mapp->conditional & EQ) {
 166                 (void)printf("%sEQ", p);
 167                 p = "/";
 168         }
 169         if (mapp->conditional & LT)
 170                 (void)printf("%sLT", p);
 171         (void)printf("\nspeed: %d\n", mapp->speed);
 172 #endif
 173 }
 174
 175 /*
 176  * Return the type of terminal to use for a port of type 'type', as specified
 177  * by the first applicable mapping in 'map'.  If no mappings apply, return
 178  * 'type'.
 179  */
 180 const char *
 181 mapped(const char *type)
 182 {
 183         MAP *mapp;
 184         int match;
 185
 186         match = 0;
 187         for (mapp = maplist; mapp; mapp = mapp->next)
 188                 if (mapp->porttype == NULL || !strcmp(mapp->porttype, type)) {
 189                         switch (mapp->conditional) {
 190                         case 0:                 /* No test specified. */
 191                                 match = 1;
 192                                 break;
 193                         case EQ:
 194                                 match = (Ospeed == mapp->speed);
 195                                 break;
 196                         case GE:
 197                                 match = (Ospeed >= mapp->speed);
 198                                 break;
 199                         case GT:
 200                                 match = (Ospeed > mapp->speed);
 201                                 break;
 202                         case LE:
 203                                 match = (Ospeed <= mapp->speed);
 204                                 break;
 205                         case LT:
 206                                 match = (Ospeed < mapp->speed);
 207                                 break;
 208                         }
 209                         if (match)
 210                                 return (mapp->type);
 211                 }
 212         /* No match found; return given type. */
 213         return (type);
 214 }
 215
 216 typedef struct speeds {
 217         const char *string;
 218         speed_t speed;
 219 } SPEEDS;
 220
 221 SPEEDS speeds[] = {
 222         { "0",          B0 },
 223         { "134.5",      B134 },
 224         { "exta",       B19200 },
 225         { "extb",       B38400 },
 226         { NULL,         0 }
 227 };
 228
 229 speed_t
 230 tset_baudrate(char *rate)
 231 {
 232         SPEEDS *sp;
 233         speed_t speed;
 234
 235         /* The baudrate number can be preceded by a 'B', which is ignored. */
 236         if (*rate == 'B')
 237                 ++rate;
 238
 239         for (sp = speeds; sp->string; ++sp)
 240                 if (!strcasecmp(rate, sp->string))
 241                         return (sp->speed);
 242         speed = atol(rate);
 243         if (speed == 0)
 244                 errx(1, "unknown baud rate %s", rate);
 245         return speed;
 246 }