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