bin/stty/key.c

   1 /* $NetBSD: key.c,v 1.22 2017/01/10 20:44:05 christos 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 1.22 2017/01/10 20:44:05 christos 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 <time.h>
  47 #include <paths.h>
  48 #include <stdlib.h>
  49 #include <stdio.h>
  50 #include <string.h>
  51 #include <unistd.h>
  52
  53 #include "stty.h"
  54 #include "extern.h"
  55
  56 __BEGIN_DECLS
  57 void    f_all(struct info *);
  58 void    f_cbreak(struct info *);
  59 void    f_columns(struct info *);
  60 void    f_dec(struct info *);
  61 void    f_everything(struct info *);
  62 void    f_extproc(struct info *);
  63 void    f_insane(struct info *);
  64 void    f_ispeed(struct info *);
  65 void    f_nl(struct info *);
  66 void    f_ospeed(struct info *);
  67 void    f_raw(struct info *);
  68 void    f_rows(struct info *);
  69 void    f_sane(struct info *);
  70 void    f_size(struct info *);
  71 void    f_speed(struct info *);
  72 void    f_ostart(struct info *);
  73 void    f_ostop(struct info *);
  74 void    f_tty(struct info *);
  75 __END_DECLS
  76
  77 static const struct key {
  78         const char *name;                       /* name */
  79         void (*f)(struct info *);               /* function */
  80 #define F_NEEDARG       0x01                    /* needs an argument */
  81 #define F_OFFOK         0x02                    /* can turn off */
  82         int flags;
  83 } keys[] = {
  84         { "all",        f_all,          0 },
  85         { "cbreak",     f_cbreak,       F_OFFOK },
  86         { "cols",       f_columns,      F_NEEDARG },
  87         { "columns",    f_columns,      F_NEEDARG },
  88         { "cooked",     f_sane,         0 },
  89         { "dec",        f_dec,          0 },
  90         { "everything", f_everything,   0 },
  91         { "extproc",    f_extproc,      F_OFFOK },
  92         { "insane",     f_insane,       0 },
  93         { "ispeed",     f_ispeed,       F_NEEDARG },
  94         { "new",        f_tty,          0 },
  95         { "nl",         f_nl,           F_OFFOK },
  96         { "old",        f_tty,          0 },
  97         { "ospeed",     f_ospeed,       F_NEEDARG },
  98         { "ostart",     f_ostart,       0 },
  99         { "ostop",      f_ostop,        0 },
 100         { "raw",        f_raw,          F_OFFOK },
 101         { "rows",       f_rows,         F_NEEDARG },
 102         { "sane",       f_sane,         0 },
 103         { "size",       f_size,         0 },
 104         { "speed",      f_speed,        0 },
 105         { "tty",        f_tty,          0 },
 106 };
 107
 108 static int c_key(const void *, const void *);
 109
 110 static int
 111 c_key(const void *a, const void *b)
 112 {
 113
 114         return (strcmp(((const struct key *)a)->name,
 115             ((const struct key *)b)->name));
 116 }
 117
 118 int
 119 ksearch(char ***argvp, struct info *ip)
 120 {
 121         char *name;
 122         struct key *kp, tmp;
 123
 124         name = **argvp;
 125         if (*name == '-') {
 126                 ip->off = 1;
 127                 ++name;
 128         } else
 129                 ip->off = 0;
 130
 131         tmp.name = name;
 132         if (!(kp = (struct key *)bsearch(&tmp, keys,
 133             sizeof(keys)/sizeof(struct key), sizeof(struct key), c_key)))
 134                 return (0);
 135         if (!(kp->flags & F_OFFOK) && ip->off) {
 136                 warnx("illegal option -- %s", name);
 137                 usage();
 138         }
 139         if (kp->flags & F_NEEDARG && !(ip->arg = *++*argvp)) {
 140                 warnx("option requires an argument -- %s", name);
 141                 usage();
 142         }
 143         kp->f(ip);
 144         return (1);
 145 }
 146
 147 void
 148 f_all(struct info *ip)
 149 {
 150         print(&ip->t, &ip->win, ip->queue, ip->ldisc, STTY_BSD);
 151 }
 152
 153 void
 154 f_cbreak(struct info *ip)
 155 {
 156         if (ip->off)
 157                 f_sane(ip);
 158         else {
 159                 ip->t.c_iflag |= BRKINT|IXON|IMAXBEL;
 160                 ip->t.c_oflag |= OPOST;
 161                 ip->t.c_lflag |= ISIG|IEXTEN;
 162                 ip->t.c_lflag &= ~ICANON;
 163                 ip->set = 1;
 164         }
 165 }
 166
 167 void
 168 f_columns(struct info *ip)
 169 {
 170         ip->win.ws_col = atoi(ip->arg);
 171         ip->wset = 1;
 172 }
 173
 174 void
 175 f_dec(struct info *ip)
 176 {
 177         ip->t.c_cc[VERASE] = (u_char)0177;
 178         ip->t.c_cc[VKILL] = CTRL('u');
 179         ip->t.c_cc[VINTR] = CTRL('c');
 180         ip->t.c_lflag &= ~ECHOPRT;
 181         ip->t.c_lflag |= ECHOE|ECHOKE|ECHOCTL;
 182         ip->t.c_iflag &= ~IXANY;
 183         ip->set = 1;
 184 }
 185
 186 void
 187 f_everything(struct info *ip)
 188 {
 189         print(&ip->t, &ip->win, ip->queue, ip->ldisc, STTY_BSD);
 190 }
 191
 192 void
 193 f_extproc(struct info *ip)
 194 {
 195 #ifdef TIOCEXT
 196         if (ip->off) {
 197                 int tmp = 0;
 198                 (void)ioctl(ip->fd, TIOCEXT, &tmp);
 199         } else {
 200                 int tmp = 1;
 201                 (void)ioctl(ip->fd, TIOCEXT, &tmp);
 202         }
 203         ip->set = 1;
 204 #endif
 205 }
 206
 207 void
 208 f_insane(struct info *ip)
 209 {
 210         int f, r;
 211
 212         r = f = open(_PATH_URANDOM, O_RDONLY, 0);
 213         if (f >= 0) {
 214                 r = read(f, &(ip->t), sizeof(struct termios));
 215                 close(f);
 216         }
 217         if (r < 0) {
 218                 /* XXX not cryptographically secure! */
 219
 220                 srandom(time(NULL));
 221                 ip->t.c_iflag = random();
 222                 ip->t.c_oflag = random();
 223                 ip->t.c_cflag = random();
 224                 ip->t.c_lflag = random();
 225                 for (f = 0; f < NCCS; f++) {
 226                         ip->t.c_cc[f] = random() & 0xFF;
 227                 }
 228                 ip->t.c_ispeed = random();
 229                 ip->t.c_ospeed = random();
 230         }
 231
 232         ip->set = 1;
 233 }
 234
 235 void
 236 f_ispeed(struct info *ip)
 237 {
 238         cfsetispeed(&ip->t, atoi(ip->arg));
 239         ip->set = 1;
 240 }
 241
 242 void
 243 f_nl(struct info *ip)
 244 {
 245         if (ip->off) {
 246                 ip->t.c_iflag |= ICRNL;
 247                 ip->t.c_oflag |= ONLCR;
 248         } else {
 249                 ip->t.c_iflag &= ~ICRNL;
 250                 ip->t.c_oflag &= ~ONLCR;
 251         }
 252         ip->set = 1;
 253 }
 254
 255 void
 256 f_ospeed(struct info *ip)
 257 {
 258         cfsetospeed(&ip->t, atoi(ip->arg));
 259         ip->set = 1;
 260 }
 261
 262 void
 263 f_raw(struct info *ip)
 264 {
 265         if (ip->off)
 266                 f_sane(ip);
 267         else {
 268                 cfmakeraw(&ip->t);
 269                 ip->t.c_cflag &= ~(CSIZE|PARENB);
 270                 ip->t.c_cflag |= CS8;
 271                 ip->set = 1;
 272         }
 273 }
 274
 275 void
 276 f_rows(struct info *ip)
 277 {
 278         ip->win.ws_row = atoi(ip->arg);
 279         ip->wset = 1;
 280 }
 281
 282 void
 283 f_sane(struct info *ip)
 284 {
 285         ip->t.c_cflag = TTYDEF_CFLAG | (ip->t.c_cflag & (CLOCAL|CRTSCTS|CDTRCTS));
 286         ip->t.c_iflag = TTYDEF_IFLAG;
 287         ip->t.c_iflag |= ICRNL;
 288         /* preserve user-preference flags in lflag */
 289 #define LKEEP   (ECHOKE|ECHOE|ECHOK|ECHOPRT|ECHOCTL|ALTWERASE|TOSTOP|NOFLSH)
 290         ip->t.c_lflag = TTYDEF_LFLAG | (ip->t.c_lflag & LKEEP);
 291         ip->t.c_oflag = TTYDEF_OFLAG;
 292         ip->set = 1;
 293 }
 294
 295 void
 296 f_size(struct info *ip)
 297 {
 298         (void)printf("%d %d\n", ip->win.ws_row, ip->win.ws_col);
 299 }
 300
 301 void
 302 f_speed(struct info *ip)
 303 {
 304         (void)printf("%d\n", cfgetospeed(&ip->t));
 305 }
 306
 307 /* ARGSUSED */
 308 void
 309 f_tty(struct info *ip)
 310 {
 311 #ifdef TTYDISC
 312         int tmp;
 313
 314         tmp = TTYDISC;
 315         if (ioctl(0, TIOCSETD, &tmp) < 0)
 316                 err(1, "TIOCSETD");
 317 #endif
 318 }
 319
 320 void
 321 f_ostart(struct info *ip)
 322 {
 323         if (ioctl (0, TIOCSTART) < 0)
 324                 err(1, "TIOCSTART");
 325 }
 326
 327 void
 328 f_ostop(struct info *ip)
 329 {
 330         if (ioctl (0, TIOCSTOP) < 0)
 331                 err(1, "TIOCSTOP");
 332 }