usr.bin/tset/tset.c

   1 /*-
   2  * Copyright (c) 1980, 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  * @(#) Copyright (c) 1980, 1991, 1993 The Regents of the University of California.  All rights reserved.
  30  * @(#)tset.c   8.1 (Berkeley) 6/9/93
  31  * $FreeBSD: src/usr.bin/tset/tset.c,v 1.14.2.1 2000/11/12 07:48:29 dg Exp $
  32  */
  33
  34 #include <sys/types.h>
  35 #include <sys/ioctl.h>
  36 #include <ctype.h>
  37 #include <err.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42 #include <termios.h>
  43 #include "extern.h"
  44
  45 void    obsolete(char *[]);
  46 void    report(const char *, int, u_int);
  47 void    usage(void) __dead2;
  48
  49 struct termios mode, oldmode;
  50
  51 int     erasech;                /* new erase character */
  52 int     intrchar;               /* new interrupt character */
  53 int     isreset;                /* invoked as reset */
  54 int     killch;                 /* new kill character */
  55 int     Lines, Columns;         /* window size */
  56 speed_t Ospeed;
  57
  58 int
  59 main(int argc, char **argv)
  60 {
  61 #ifdef TIOCGWINSZ
  62         struct winsize win;
  63 #endif
  64         int ch, noinit, noset, quiet, Sflag, sflag, showterm, usingupper;
  65         char *p, *tcapbuf;
  66         const char *ttype;
  67
  68         if (tcgetattr(STDERR_FILENO, &mode) < 0)
  69                 err(1, "standard error");
  70
  71         oldmode = mode;
  72         Ospeed = cfgetospeed(&mode);
  73
  74         if ((p = strrchr(*argv, '/')))
  75                 ++p;
  76         else
  77                 p = *argv;
  78         usingupper = isupper(*p);
  79         if (!strcasecmp(p, "reset")) {
  80                 isreset = 1;
  81                 reset_mode();
  82         }
  83
  84         obsolete(argv);
  85         noinit = noset = quiet = Sflag = sflag = showterm = 0;
  86         while ((ch = getopt(argc, argv, "-a:d:e:Ii:k:m:np:QSrs")) != -1) {
  87                 switch (ch) {
  88                 case '-':               /* display term only */
  89                         noset = 1;
  90                         break;
  91                 case 'a':               /* OBSOLETE: map identifier to type */
  92                         add_mapping("arpanet", optarg);
  93                         break;
  94                 case 'd':               /* OBSOLETE: map identifier to type */
  95                         add_mapping("dialup", optarg);
  96                         break;
  97                 case 'e':               /* erase character */
  98                         erasech = optarg[0] == '^' && optarg[1] != '\0' ?
  99                             optarg[1] == '?' ? '\177' : CTRL(optarg[1]) :
 100                             optarg[0];
 101                         break;
 102                 case 'I':               /* no initialization strings */
 103                         noinit = 1;
 104                         break;
 105                 case 'i':               /* interrupt character */
 106                         intrchar = optarg[0] == '^' && optarg[1] != '\0' ?
 107                             optarg[1] == '?' ? '\177' : CTRL(optarg[1]) :
 108                             optarg[0];
 109                         break;
 110                 case 'k':               /* kill character */
 111                         killch = optarg[0] == '^' && optarg[1] != '\0' ?
 112                             optarg[1] == '?' ? '\177' : CTRL(optarg[1]) :
 113                             optarg[0];
 114                         break;
 115                 case 'm':               /* map identifier to type */
 116                         add_mapping(NULL, optarg);
 117                         break;
 118                 case 'n':               /* OBSOLETE: set new tty driver */
 119                         break;
 120                 case 'p':               /* OBSOLETE: map identifier to type */
 121                         add_mapping("plugboard", optarg);
 122                         break;
 123                 case 'Q':               /* don't output control key settings */
 124                         quiet = 1;
 125                         break;
 126                 case 'S':               /* output TERM/TERMCAP strings */
 127                         Sflag = 1;
 128                         break;
 129                 case 'r':               /* display term on stderr */
 130                         showterm = 1;
 131                         break;
 132                 case 's':               /* output TERM/TERMCAP strings */
 133                         sflag = 1;
 134                         break;
 135                 case '?':
 136                 default:
 137                         usage();
 138                 }
 139         }
 140         argc -= optind;
 141         argv += optind;
 142
 143         if (argc > 1)
 144                 usage();
 145
 146         ttype = get_termcap_entry(*argv, &tcapbuf);
 147
 148         if (!noset) {
 149                 Columns = tgetnum("co");
 150                 Lines = tgetnum("li");
 151
 152 #ifdef TIOCGWINSZ
 153                 /* Set window size */
 154                 (void)ioctl(STDERR_FILENO, TIOCGWINSZ, &win);
 155                 if (win.ws_row == 0 && win.ws_col == 0 &&
 156                     Lines > 0 && Columns > 0) {
 157                         win.ws_row = Lines;
 158                         win.ws_col = Columns;
 159                         (void)ioctl(STDERR_FILENO, TIOCSWINSZ, &win);
 160                 }
 161 #endif
 162                 set_control_chars();
 163                 set_conversions(usingupper);
 164
 165                 if (!noinit)
 166                         set_init();
 167
 168                 /* Set the modes if they've changed. */
 169                 if (memcmp(&mode, &oldmode, sizeof(mode)))
 170                         tcsetattr(STDERR_FILENO, TCSADRAIN, &mode);
 171         }
 172
 173         if (noset)
 174                 (void)printf("%s\n", ttype);
 175         else {
 176                 if (showterm)
 177                         (void)fprintf(stderr, "Terminal type is %s.\n", ttype);
 178                 /*
 179                  * If erase, kill and interrupt characters could have been
 180                  * modified and not -Q, display the changes.
 181                  */
 182                 if (!quiet) {
 183                         report("Erase", VERASE, CERASE);
 184                         report("Kill", VKILL, CKILL);
 185                         report("Interrupt", VINTR, CINTR);
 186                 }
 187         }
 188
 189         if (Sflag) {
 190                 (void)printf("%s ", ttype);
 191                 if (strlen(tcapbuf) > 0)
 192                         wrtermcap(tcapbuf);
 193         }
 194
 195         if (sflag) {
 196                 /*
 197                  * Figure out what shell we're using.  A hack, we look for an
 198                  * environmental variable SHELL ending in "csh".
 199                  */
 200                 if ((p = getenv("SHELL")) &&
 201                     !strcmp(p + strlen(p) - 3, "csh")) {
 202                         printf("set noglob;\nsetenv TERM %s;\n", ttype);
 203                         if (strlen(tcapbuf) > 0) {
 204                                 printf("setenv TERMCAP '");
 205                                 wrtermcap(tcapbuf);
 206                                 printf("';\n");
 207                         }
 208                         printf("unset noglob;\n");
 209                 } else {
 210                         printf("TERM=%s;\n", ttype);
 211                         if (strlen(tcapbuf) > 0) {
 212                                 printf("TERMCAP='");
 213                                 wrtermcap(tcapbuf);
 214                                 printf("';\nexport TERMCAP;\n");
 215                         }
 216                         printf("export TERM;\n");
 217                 }
 218         }
 219
 220         exit(0);
 221 }
 222
 223 /*
 224  * Tell the user if a control key has been changed from the default value.
 225  */
 226 void
 227 report(const char *name, int which, u_int def)
 228 {
 229         u_int old, new;
 230
 231         new = mode.c_cc[which];
 232         old = oldmode.c_cc[which];
 233
 234         if (old == new && old == def)
 235                 return;
 236
 237         (void)fprintf(stderr, "%s %s ", name, old == new ? "is" : "set to");
 238
 239         if (new == 010)
 240                 (void)fprintf(stderr, "backspace.\n");
 241         else if (new == 0177)
 242                 (void)fprintf(stderr, "delete.\n");
 243         else if (new < 040) {
 244                 new ^= 0100;
 245                 (void)fprintf(stderr, "control-%c (^%c).\n", new, new);
 246         } else
 247                 (void)fprintf(stderr, "%c.\n", new);
 248 }
 249
 250 /*
 251  * Convert the obsolete argument form into something that getopt can handle.
 252  * This means that -e, -i and -k get default arguments supplied for them.
 253  */
 254 void
 255 obsolete(char **argv)
 256 {
 257         for (; *argv; ++argv) {
 258                 if (argv[0][0] != '-' || (argv[1] && argv[1][0] != '-') ||
 259                     (argv[0][1] != 'e' && argv[0][1] != 'i' && argv[0][1] != 'k') ||
 260                         argv[0][2] != '\0')
 261                         continue;
 262                 switch(argv[0][1]) {
 263                 case 'e':
 264                         argv[0] = strdup("-e^H");
 265                         break;
 266                 case 'i':
 267                         argv[0] = strdup("-i^C");
 268                         break;
 269                 case 'k':
 270                         argv[0] = strdup("-k^U");
 271                         break;
 272                 }
 273         }
 274 }
 275
 276 void
 277 usage(void)
 278 {
 279         (void)fprintf(stderr, "%s\n%s\n",
 280 "usage: tset  [-IQrSs] [-] [-e ch] [-i ch] [-k ch] [-m mapping] [terminal]",
 281 "       reset [-IQrSs] [-] [-e ch] [-i ch] [-k ch] [-m mapping] [terminal]");
 282         exit(1);
 283 }
 284