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key.c revision 1.21 
      1 /* $NetBSD: key.c,v 1.21 2013/09/12 19:47:23 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 1.21 2013/09/12 19:47:23 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 <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->queue, 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->queue, 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 }
    332