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  * $DragonFly: src/usr.bin/tset/tset.c,v 1.3 2003/10/04 20:36:53 hmp Exp $
  33  */
  34
  35 #include <sys/types.h>
  36 #include <sys/ioctl.h>
  37 #include <ctype.h>
  38 #include <err.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <unistd.h>
  43 #include <termios.h>
  44 #include "extern.h"
  45
  46 void    obsolete(char *[]);
  47 void    report(const char *, int, u_int);
  48 void    usage(void);
  49
  50 struct termios mode, oldmode;
  51
  52 int     erasech;                /* new erase character */
  53 int     intrchar;               /* new interrupt character */
  54 int     isreset;                /* invoked as reset */
  55 int     killch;                 /* new kill character */
  56 int     Lines, Columns;         /* window size */
  57 speed_t Ospeed;
  58
  59 int
  60 main(int argc, char **argv)
  61 {
  62 #ifdef TIOCGWINSZ
  63         struct winsize win;
  64 #endif
  65         int ch, noinit, noset, quiet, Sflag, sflag, showterm, usingupper;
  66         char *p, *tcapbuf;
  67         const char *ttype;
  68
  69         if (tcgetattr(STDERR_FILENO, &mode) < 0)
  70                 err(1, "standard error");
  71
  72         oldmode = mode;
  73         Ospeed = cfgetospeed(&mode);
  74
  75         if ((p = strrchr(*argv, '/')))
  76                 ++p;
  77         else
  78                 p = *argv;
  79         usingupper = isupper(*p);
  80         if (!strcasecmp(p, "reset")) {
  81                 isreset = 1;
  82                 reset_mode();
  83         }
  84
  85         obsolete(argv);
  86         noinit = noset = quiet = Sflag = sflag = showterm = 0;
  87         while ((ch = getopt(argc, argv, "-a:d:e:Ii:k:m:np:QSrs")) != -1) {
  88                 switch (ch) {
  89                 case '-':               /* display term only */
  90                         noset = 1;
  91                         break;
  92                 case 'a':               /* OBSOLETE: map identifier to type */
  93                         add_mapping("arpanet", optarg);
  94                         break;
  95                 case 'd':               /* OBSOLETE: map identifier to type */
  96                         add_mapping("dialup", optarg);
  97                         break;
  98                 case 'e':               /* erase character */
  99                         erasech = optarg[0] == '^' && optarg[1] != '\0' ?
 100                             optarg[1] == '?' ? '\177' : CTRL(optarg[1]) :
 101                             optarg[0];
 102                         break;
 103                 case 'I':               /* no initialization strings */
 104                         noinit = 1;
 105                         break;
 106                 case 'i':               /* interrupt character */
 107                         intrchar = optarg[0] == '^' && optarg[1] != '\0' ?
 108                             optarg[1] == '?' ? '\177' : CTRL(optarg[1]) :
 109                             optarg[0];
 110                         break;
 111                 case 'k':               /* kill character */
 112                         killch = optarg[0] == '^' && optarg[1] != '\0' ?
 113                             optarg[1] == '?' ? '\177' : CTRL(optarg[1]) :
 114                             optarg[0];
 115                         break;
 116                 case 'm':               /* map identifier to type */
 117                         add_mapping(NULL, optarg);
 118                         break;
 119                 case 'n':               /* OBSOLETE: set new tty driver */
 120                         break;
 121                 case 'p':               /* OBSOLETE: map identifier to type */
 122                         add_mapping("plugboard", optarg);
 123                         break;
 124                 case 'Q':               /* don't output control key settings */
 125                         quiet = 1;
 126                         break;
 127                 case 'S':               /* output TERM/TERMCAP strings */
 128                         Sflag = 1;
 129                         break;
 130                 case 'r':               /* display term on stderr */
 131                         showterm = 1;
 132                         break;
 133                 case 's':               /* output TERM/TERMCAP strings */
 134                         sflag = 1;
 135                         break;
 136                 case '?':
 137                 default:
 138                         usage();
 139                 }
 140         }
 141         argc -= optind;
 142         argv += optind;
 143
 144         if (argc > 1)
 145                 usage();
 146
 147         ttype = get_termcap_entry(*argv, &tcapbuf);
 148
 149         if (!noset) {
 150                 Columns = tgetnum("co");
 151                 Lines = tgetnum("li");
 152
 153 #ifdef TIOCGWINSZ
 154                 /* Set window size */
 155                 (void)ioctl(STDERR_FILENO, TIOCGWINSZ, &win);
 156                 if (win.ws_row == 0 && win.ws_col == 0 &&
 157                     Lines > 0 && Columns > 0) {
 158                         win.ws_row = Lines;
 159                         win.ws_col = Columns;
 160                         (void)ioctl(STDERR_FILENO, TIOCSWINSZ, &win);
 161                 }
 162 #endif
 163                 set_control_chars();
 164                 set_conversions(usingupper);
 165
 166                 if (!noinit)
 167                         set_init();
 168
 169                 /* Set the modes if they've changed. */
 170                 if (memcmp(&mode, &oldmode, sizeof(mode)))
 171                         tcsetattr(STDERR_FILENO, TCSADRAIN, &mode);
 172         }
 173
 174         if (noset)
 175                 (void)printf("%s\n", ttype);
 176         else {
 177                 if (showterm)
 178                         (void)fprintf(stderr, "Terminal type is %s.\n", ttype);
 179                 /*
 180                  * If erase, kill and interrupt characters could have been
 181                  * modified and not -Q, display the changes.
 182                  */
 183                 if (!quiet) {
 184                         report("Erase", VERASE, CERASE);
 185                         report("Kill", VKILL, CKILL);
 186                         report("Interrupt", VINTR, CINTR);
 187                 }
 188         }
 189
 190         if (Sflag) {
 191                 (void)printf("%s ", ttype);
 192                 if (strlen(tcapbuf) > 0)
 193                         wrtermcap(tcapbuf);
 194         }
 195
 196         if (sflag) {
 197                 /*
 198                  * Figure out what shell we're using.  A hack, we look for an
 199                  * environmental variable SHELL ending in "csh".
 200                  */
 201                 if ((p = getenv("SHELL")) &&
 202                     !strcmp(p + strlen(p) - 3, "csh")) {
 203                         printf("set noglob;\nsetenv TERM %s;\n", ttype);
 204                         if (strlen(tcapbuf) > 0) {
 205                                 printf("setenv TERMCAP '");
 206                                 wrtermcap(tcapbuf);
 207                                 printf("';\n");
 208                         }
 209                         printf("unset noglob;\n");
 210                 } else {
 211                         printf("TERM=%s;\n", ttype);
 212                         if (strlen(tcapbuf) > 0) {
 213                                 printf("TERMCAP='");
 214                                 wrtermcap(tcapbuf);
 215                                 printf("';\nexport TERMCAP;\n");
 216                         }
 217                         printf("export TERM;\n");
 218                 }
 219         }
 220
 221         exit(0);
 222 }
 223
 224 /*
 225  * Tell the user if a control key has been changed from the default value.
 226  */
 227 void
 228 report(const char *name, int which, u_int def)
 229 {
 230         u_int old, new;
 231
 232         new = mode.c_cc[which];
 233         old = oldmode.c_cc[which];
 234
 235         if (old == new && old == def)
 236                 return;
 237
 238         (void)fprintf(stderr, "%s %s ", name, old == new ? "is" : "set to");
 239
 240         if (new == 010)
 241                 (void)fprintf(stderr, "backspace.\n");
 242         else if (new == 0177)
 243                 (void)fprintf(stderr, "delete.\n");
 244         else if (new < 040) {
 245                 new ^= 0100;
 246                 (void)fprintf(stderr, "control-%c (^%c).\n", new, new);
 247         } else
 248                 (void)fprintf(stderr, "%c.\n", new);
 249 }
 250
 251 /*
 252  * Convert the obsolete argument form into something that getopt can handle.
 253  * This means that -e, -i and -k get default arguments supplied for them.
 254  */
 255 void
 256 obsolete(char **argv)
 257 {
 258         for (; *argv; ++argv) {
 259                 if (argv[0][0] != '-' || (argv[1] && argv[1][0] != '-') ||
 260                     (argv[0][1] != 'e' && argv[0][1] != 'i' && argv[0][1] != 'k') ||
 261                         argv[0][2] != '\0')
 262                         continue;
 263                 switch(argv[0][1]) {
 264                 case 'e':
 265                         argv[0] = strdup("-e^H");
 266                         break;
 267                 case 'i':
 268                         argv[0] = strdup("-i^C");
 269                         break;
 270                 case 'k':
 271                         argv[0] = strdup("-k^U");
 272                         break;
 273                 }
 274         }
 275 }
 276
 277 void
 278 usage(void)
 279 {
 280         (void)fprintf(stderr, "%s\n%s\n",
 281 "usage: tset  [-IQrSs] [-] [-e ch] [-i ch] [-k ch] [-m mapping] [terminal]",
 282 "       reset [-IQrSs] [-] [-e ch] [-i ch] [-k ch] [-m mapping] [terminal]");
 283         exit(1);
 284 }
 285