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      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 }
    333