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. 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  * @(#) Copyright (c) 1980, 1991, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)tset.c   8.1 (Berkeley) 6/9/93
  35  * $FreeBSD: src/usr.bin/tset/tset.c,v 1.14.2.1 2000/11/12 07:48:29 dg Exp $
  36  * $DragonFly: src/usr.bin/tset/tset.c,v 1.3 2003/10/04 20:36:53 hmp Exp $
  37  */
  38
  39 #include <sys/types.h>
  40 #include <sys/ioctl.h>
  41 #include <ctype.h>
  42 #include <err.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <unistd.h>
  47 #include <termios.h>
  48 #include "extern.h"
  49
  50 void    obsolete(char *[]);
  51 void    report(const char *, int, u_int);
  52 void    usage(void);
  53
  54 struct termios mode, oldmode;
  55
  56 int     erasech;                /* new erase character */
  57 int     intrchar;               /* new interrupt character */
  58 int     isreset;                /* invoked as reset */
  59 int     killch;                 /* new kill character */
  60 int     Lines, Columns;         /* window size */
  61 speed_t Ospeed;
  62
  63 int
  64 main(int argc, char **argv)
  65 {
  66 #ifdef TIOCGWINSZ
  67         struct winsize win;
  68 #endif
  69         int ch, noinit, noset, quiet, Sflag, sflag, showterm, usingupper;
  70         char *p, *tcapbuf;
  71         const char *ttype;
  72
  73         if (tcgetattr(STDERR_FILENO, &mode) < 0)
  74                 err(1, "standard error");
  75
  76         oldmode = mode;
  77         Ospeed = cfgetospeed(&mode);
  78
  79         if ((p = strrchr(*argv, '/')))
  80                 ++p;
  81         else
  82                 p = *argv;
  83         usingupper = isupper(*p);
  84         if (!strcasecmp(p, "reset")) {
  85                 isreset = 1;
  86                 reset_mode();
  87         }
  88
  89         obsolete(argv);
  90         noinit = noset = quiet = Sflag = sflag = showterm = 0;
  91         while ((ch = getopt(argc, argv, "-a:d:e:Ii:k:m:np:QSrs")) != -1) {
  92                 switch (ch) {
  93                 case '-':               /* display term only */
  94                         noset = 1;
  95                         break;
  96                 case 'a':               /* OBSOLETE: map identifier to type */
  97                         add_mapping("arpanet", optarg);
  98                         break;
  99                 case 'd':               /* OBSOLETE: map identifier to type */
 100                         add_mapping("dialup", optarg);
 101                         break;
 102                 case 'e':               /* erase character */
 103                         erasech = optarg[0] == '^' && optarg[1] != '\0' ?
 104                             optarg[1] == '?' ? '\177' : CTRL(optarg[1]) :
 105                             optarg[0];
 106                         break;
 107                 case 'I':               /* no initialization strings */
 108                         noinit = 1;
 109                         break;
 110                 case 'i':               /* interrupt character */
 111                         intrchar = optarg[0] == '^' && optarg[1] != '\0' ?
 112                             optarg[1] == '?' ? '\177' : CTRL(optarg[1]) :
 113                             optarg[0];
 114                         break;
 115                 case 'k':               /* kill character */
 116                         killch = optarg[0] == '^' && optarg[1] != '\0' ?
 117                             optarg[1] == '?' ? '\177' : CTRL(optarg[1]) :
 118                             optarg[0];
 119                         break;
 120                 case 'm':               /* map identifier to type */
 121                         add_mapping(NULL, optarg);
 122                         break;
 123                 case 'n':               /* OBSOLETE: set new tty driver */
 124                         break;
 125                 case 'p':               /* OBSOLETE: map identifier to type */
 126                         add_mapping("plugboard", optarg);
 127                         break;
 128                 case 'Q':               /* don't output control key settings */
 129                         quiet = 1;
 130                         break;
 131                 case 'S':               /* output TERM/TERMCAP strings */
 132                         Sflag = 1;
 133                         break;
 134                 case 'r':               /* display term on stderr */
 135                         showterm = 1;
 136                         break;
 137                 case 's':               /* output TERM/TERMCAP strings */
 138                         sflag = 1;
 139                         break;
 140                 case '?':
 141                 default:
 142                         usage();
 143                 }
 144         }
 145         argc -= optind;
 146         argv += optind;
 147
 148         if (argc > 1)
 149                 usage();
 150
 151         ttype = get_termcap_entry(*argv, &tcapbuf);
 152
 153         if (!noset) {
 154                 Columns = tgetnum("co");
 155                 Lines = tgetnum("li");
 156
 157 #ifdef TIOCGWINSZ
 158                 /* Set window size */
 159                 (void)ioctl(STDERR_FILENO, TIOCGWINSZ, &win);
 160                 if (win.ws_row == 0 && win.ws_col == 0 &&
 161                     Lines > 0 && Columns > 0) {
 162                         win.ws_row = Lines;
 163                         win.ws_col = Columns;
 164                         (void)ioctl(STDERR_FILENO, TIOCSWINSZ, &win);
 165                 }
 166 #endif
 167                 set_control_chars();
 168                 set_conversions(usingupper);
 169
 170                 if (!noinit)
 171                         set_init();
 172
 173                 /* Set the modes if they've changed. */
 174                 if (memcmp(&mode, &oldmode, sizeof(mode)))
 175                         tcsetattr(STDERR_FILENO, TCSADRAIN, &mode);
 176         }
 177
 178         if (noset)
 179                 (void)printf("%s\n", ttype);
 180         else {
 181                 if (showterm)
 182                         (void)fprintf(stderr, "Terminal type is %s.\n", ttype);
 183                 /*
 184                  * If erase, kill and interrupt characters could have been
 185                  * modified and not -Q, display the changes.
 186                  */
 187                 if (!quiet) {
 188                         report("Erase", VERASE, CERASE);
 189                         report("Kill", VKILL, CKILL);
 190                         report("Interrupt", VINTR, CINTR);
 191                 }
 192         }
 193
 194         if (Sflag) {
 195                 (void)printf("%s ", ttype);
 196                 if (strlen(tcapbuf) > 0)
 197                         wrtermcap(tcapbuf);
 198         }
 199
 200         if (sflag) {
 201                 /*
 202                  * Figure out what shell we're using.  A hack, we look for an
 203                  * environmental variable SHELL ending in "csh".
 204                  */
 205                 if ((p = getenv("SHELL")) &&
 206                     !strcmp(p + strlen(p) - 3, "csh")) {
 207                         printf("set noglob;\nsetenv TERM %s;\n", ttype);
 208                         if (strlen(tcapbuf) > 0) {
 209                                 printf("setenv TERMCAP '");
 210                                 wrtermcap(tcapbuf);
 211                                 printf("';\n");
 212                         }
 213                         printf("unset noglob;\n");
 214                 } else {
 215                         printf("TERM=%s;\n", ttype);
 216                         if (strlen(tcapbuf) > 0) {
 217                                 printf("TERMCAP='");
 218                                 wrtermcap(tcapbuf);
 219                                 printf("';\nexport TERMCAP;\n");
 220                         }
 221                         printf("export TERM;\n");
 222                 }
 223         }
 224
 225         exit(0);
 226 }
 227
 228 /*
 229  * Tell the user if a control key has been changed from the default value.
 230  */
 231 void
 232 report(const char *name, int which, u_int def)
 233 {
 234         u_int old, new;
 235
 236         new = mode.c_cc[which];
 237         old = oldmode.c_cc[which];
 238
 239         if (old == new && old == def)
 240                 return;
 241
 242         (void)fprintf(stderr, "%s %s ", name, old == new ? "is" : "set to");
 243
 244         if (new == 010)
 245                 (void)fprintf(stderr, "backspace.\n");
 246         else if (new == 0177)
 247                 (void)fprintf(stderr, "delete.\n");
 248         else if (new < 040) {
 249                 new ^= 0100;
 250                 (void)fprintf(stderr, "control-%c (^%c).\n", new, new);
 251         } else
 252                 (void)fprintf(stderr, "%c.\n", new);
 253 }
 254
 255 /*
 256  * Convert the obsolete argument form into something that getopt can handle.
 257  * This means that -e, -i and -k get default arguments supplied for them.
 258  */
 259 void
 260 obsolete(char **argv)
 261 {
 262         for (; *argv; ++argv) {
 263                 if (argv[0][0] != '-' || (argv[1] && argv[1][0] != '-') ||
 264                     (argv[0][1] != 'e' && argv[0][1] != 'i' && argv[0][1] != 'k') ||
 265                         argv[0][2] != '\0')
 266                         continue;
 267                 switch(argv[0][1]) {
 268                 case 'e':
 269                         argv[0] = strdup("-e^H");
 270                         break;
 271                 case 'i':
 272                         argv[0] = strdup("-i^C");
 273                         break;
 274                 case 'k':
 275                         argv[0] = strdup("-k^U");
 276                         break;
 277                 }
 278         }
 279 }
 280
 281 void
 282 usage(void)
 283 {
 284         (void)fprintf(stderr, "%s\n%s\n",
 285 "usage: tset  [-IQrSs] [-] [-e ch] [-i ch] [-k ch] [-m mapping] [terminal]",
 286 "       reset [-IQrSs] [-] [-e ch] [-i ch] [-k ch] [-m mapping] [terminal]");
 287         exit(1);
 288 }
 289