bin/stty/key.c

   1 /* $NetBSD: key.c,v 1.19 2003/08/07 09:05:41 agc Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1991, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)key.c       8.4 (Berkeley) 2/20/95";
  36 #else
  37 __RCSID("$NetBSD: key.c,v 1.19 2003/08/07 09:05:41 agc Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 #include <sys/types.h>
  42
  43 #include <err.h>
  44 #include <errno.h>
  45 #include <fcntl.h>
  46 #include <paths.h>
  47 #include <stdlib.h>
  48 #include <stdio.h>
  49 #include <string.h>
  50 #include <unistd.h>
  51
  52 #include "stty.h"
  53 #include "extern.h"
  54
  55 __BEGIN_DECLS
  56 void    f_all(struct info *);
  57 void    f_cbreak(struct info *);
  58 void    f_columns(struct info *);
  59 void    f_dec(struct info *);
  60 void    f_everything(struct info *);
  61 void    f_extproc(struct info *);
  62 void    f_insane(struct info *);
  63 void    f_ispeed(struct info *);
  64 void    f_nl(struct info *);
  65 void    f_ospeed(struct info *);
  66 void    f_raw(struct info *);
  67 void    f_rows(struct info *);
  68 void    f_sane(struct info *);
  69 void    f_size(struct info *);
  70 void    f_speed(struct info *);
  71 void    f_ostart(struct info *);
  72 void    f_ostop(struct info *);
  73 void    f_tty(struct info *);
  74 __END_DECLS
  75
  76 static const struct key {
  77         const char *name;                       /* name */
  78         void (*f)(struct info *);               /* function */
  79 #define F_NEEDARG       0x01                    /* needs an argument */
  80 #define F_OFFOK         0x02                    /* can turn off */
  81         int flags;
  82 } keys[] = {
  83         { "all",        f_all,          0 },
  84         { "cbreak",     f_cbreak,       F_OFFOK },
  85         { "cols",       f_columns,      F_NEEDARG },
  86         { "columns",    f_columns,      F_NEEDARG },
  87         { "cooked",     f_sane,         0 },
  88         { "dec",        f_dec,          0 },
  89         { "everything", f_everything,   0 },
  90         { "extproc",    f_extproc,      F_OFFOK },
  91         { "insane",     f_insane,       0 },
  92         { "ispeed",     f_ispeed,       F_NEEDARG },
  93         { "new",        f_tty,          0 },
  94         { "nl",         f_nl,           F_OFFOK },
  95         { "old",        f_tty,          0 },
  96         { "ospeed",     f_ospeed,       F_NEEDARG },
  97         { "ostart",     f_ostart,       0 },
  98         { "ostop",      f_ostop,        0 },
  99         { "raw",        f_raw,          F_OFFOK },
 100         { "rows",       f_rows,         F_NEEDARG },
 101         { "sane",       f_sane,         0 },
 102         { "size",       f_size,         0 },
 103         { "speed",      f_speed,        0 },
 104         { "tty",        f_tty,          0 },
 105 };
 106
 107 static int c_key(const void *, const void *);
 108
 109 static int
 110 c_key(const void *a, const void *b)
 111 {
 112
 113         return (strcmp(((const struct key *)a)->name,
 114             ((const struct key *)b)->name));
 115 }
 116
 117 int
 118 ksearch(char ***argvp, struct info *ip)
 119 {
 120         char *name;
 121         struct key *kp, tmp;
 122
 123         name = **argvp;
 124         if (*name == '-') {
 125                 ip->off = 1;
 126                 ++name;
 127         } else
 128                 ip->off = 0;
 129
 130         tmp.name = name;
 131         if (!(kp = (struct key *)bsearch(&tmp, keys,
 132             sizeof(keys)/sizeof(struct key), sizeof(struct key), c_key)))
 133                 return (0);
 134         if (!(kp->flags & F_OFFOK) && ip->off) {
 135                 warnx("illegal option -- %s", name);
 136                 usage();
 137         }
 138         if (kp->flags & F_NEEDARG && !(ip->arg = *++*argvp)) {
 139                 warnx("option requires an argument -- %s", name);
 140                 usage();
 141         }
 142         kp->f(ip);
 143         return (1);
 144 }
 145
 146 void
 147 f_all(struct info *ip)
 148 {
 149         print(&ip->t, &ip->win, ip->ldisc, STTY_BSD);
 150 }
 151
 152 void
 153 f_cbreak(struct info *ip)
 154 {
 155         if (ip->off)
 156                 f_sane(ip);
 157         else {
 158                 ip->t.c_iflag |= BRKINT|IXON|IMAXBEL;
 159                 ip->t.c_oflag |= OPOST;
 160                 ip->t.c_lflag |= ISIG|IEXTEN;
 161                 ip->t.c_lflag &= ~ICANON;
 162                 ip->set = 1;
 163         }
 164 }
 165
 166 void
 167 f_columns(struct info *ip)
 168 {
 169         ip->win.ws_col = atoi(ip->arg);
 170         ip->wset = 1;
 171 }
 172
 173 void
 174 f_dec(struct info *ip)
 175 {
 176         ip->t.c_cc[VERASE] = (u_char)0177;
 177         ip->t.c_cc[VKILL] = CTRL('u');
 178         ip->t.c_cc[VINTR] = CTRL('c');
 179         ip->t.c_lflag &= ~ECHOPRT;
 180         ip->t.c_lflag |= ECHOE|ECHOKE|ECHOCTL;
 181         ip->t.c_iflag &= ~IXANY;
 182         ip->set = 1;
 183 }
 184
 185 void
 186 f_everything(struct info *ip)
 187 {
 188         print(&ip->t, &ip->win, ip->ldisc, STTY_BSD);
 189 }
 190
 191 void
 192 f_extproc(struct info *ip)
 193 {
 194 #ifdef TIOCEXT
 195         if (ip->off) {
 196                 int tmp = 0;
 197                 (void)ioctl(ip->fd, TIOCEXT, &tmp);
 198         } else {
 199                 int tmp = 1;
 200                 (void)ioctl(ip->fd, TIOCEXT, &tmp);
 201         }
 202         ip->set = 1;
 203 #endif
 204 }
 205
 206 void
 207 f_insane(struct info *ip)
 208 {
 209         int f, r;
 210
 211         r = f = open(_PATH_URANDOM, O_RDONLY, 0);
 212         if (f >= 0) {
 213                 r = read(f, &(ip->t), sizeof(struct termios));
 214                 close(f);
 215         }
 216         if (r < 0) {
 217                 /* XXX not cryptographically secure! */
 218
 219                 srandom(time(NULL));
 220                 ip->t.c_iflag = random();
 221                 ip->t.c_oflag = random();
 222                 ip->t.c_cflag = random();
 223                 ip->t.c_lflag = random();
 224                 for (f = 0; f < NCCS; f++) {
 225                         ip->t.c_cc[f] = random() & 0xFF;
 226                 }
 227                 ip->t.c_ispeed = random();
 228                 ip->t.c_ospeed = random();
 229         }
 230
 231         ip->set = 1;
 232 }
 233
 234 void
 235 f_ispeed(struct info *ip)
 236 {
 237         cfsetispeed(&ip->t, atoi(ip->arg));
 238         ip->set = 1;
 239 }
 240
 241 void
 242 f_nl(struct info *ip)
 243 {
 244         if (ip->off) {
 245                 ip->t.c_iflag |= ICRNL;
 246                 ip->t.c_oflag |= ONLCR;
 247         } else {
 248                 ip->t.c_iflag &= ~ICRNL;
 249                 ip->t.c_oflag &= ~ONLCR;
 250         }
 251         ip->set = 1;
 252 }
 253
 254 void
 255 f_ospeed(struct info *ip)
 256 {
 257         cfsetospeed(&ip->t, atoi(ip->arg));
 258         ip->set = 1;
 259 }
 260
 261 void
 262 f_raw(struct info *ip)
 263 {
 264         if (ip->off)
 265                 f_sane(ip);
 266         else {
 267                 cfmakeraw(&ip->t);
 268                 ip->t.c_cflag &= ~(CSIZE|PARENB);
 269                 ip->t.c_cflag |= CS8;
 270                 ip->set = 1;
 271         }
 272 }
 273
 274 void
 275 f_rows(struct info *ip)
 276 {
 277         ip->win.ws_row = atoi(ip->arg);
 278         ip->wset = 1;
 279 }
 280
 281 void
 282 f_sane(struct info *ip)
 283 {
 284         ip->t.c_cflag = TTYDEF_CFLAG | (ip->t.c_cflag & (CLOCAL|CRTSCTS|CDTRCTS));
 285         ip->t.c_iflag = TTYDEF_IFLAG;
 286         ip->t.c_iflag |= ICRNL;
 287         /* preserve user-preference flags in lflag */
 288 #define LKEEP   (ECHOKE|ECHOE|ECHOK|ECHOPRT|ECHOCTL|ALTWERASE|TOSTOP|NOFLSH)
 289         ip->t.c_lflag = TTYDEF_LFLAG | (ip->t.c_lflag & LKEEP);
 290         ip->t.c_oflag = TTYDEF_OFLAG;
 291         ip->set = 1;
 292 }
 293
 294 void
 295 f_size(struct info *ip)
 296 {
 297         (void)printf("%d %d\n", ip->win.ws_row, ip->win.ws_col);
 298 }
 299
 300 void
 301 f_speed(struct info *ip)
 302 {
 303         (void)printf("%d\n", cfgetospeed(&ip->t));
 304 }
 305
 306 /* ARGSUSED */
 307 void
 308 f_tty(struct info *ip)
 309 {
 310 #ifdef TTYDISC
 311         int tmp;
 312
 313         tmp = TTYDISC;
 314         if (ioctl(0, TIOCSETD, &tmp) < 0)
 315                 err(1, "TIOCSETD");
 316 #endif
 317 }
 318
 319 void
 320 f_ostart(struct info *ip)
 321 {
 322         if (ioctl (0, TIOCSTART) < 0)
 323                 err(1, "TIOCSTART");
 324 }
 325
 326 void
 327 f_ostop(struct info *ip)
 328 {
 329         if (ioctl (0, TIOCSTOP) < 0)
 330                 err(1, "TIOCSTOP");
 331 }