1/*	$OpenBSD: stty.c,v 1.22 2021/10/23 16:45:32 mestre Exp $	*/
2/*	$NetBSD: stty.c,v 1.11 1995/03/21 09:11:30 cgd Exp $	*/
3
4/*-
5 * Copyright (c) 1989, 1991, 1993, 1994
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/types.h>
34#include <sys/ioctl.h>
35
36#include <ctype.h>
37#include <err.h>
38#include <errno.h>
39#include <fcntl.h>
40#include <limits.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <string.h>
44#include <termios.h>
45#include <unistd.h>
46
47#include "stty.h"
48#include "extern.h"
49
50int
51main(int argc, char *argv[])
52{
53	struct info i;
54	enum FMT fmt;
55	int ch;
56
57	fmt = NOTSET;
58	i.fd = STDIN_FILENO;
59
60	opterr = 0;
61	while (optind < argc &&
62	    strspn(argv[optind], "-aefg") == strlen(argv[optind]) &&
63	    (ch = getopt(argc, argv, "aef:g")) != -1)
64		switch(ch) {
65		case 'a':
66			fmt = POSIX;
67			break;
68		case 'e':
69			fmt = BSD;
70			break;
71		case 'f':
72			if ((i.fd = open(optarg, O_RDONLY | O_NONBLOCK)) == -1)
73				err(1, "%s", optarg);
74			break;
75		case 'g':
76			fmt = GFLAG;
77			break;
78		default:
79			goto args;
80		}
81
82args:	argc -= optind;
83	argv += optind;
84
85	if (unveil("/", "") == -1)
86		err(1, "unveil /");
87	if (unveil(NULL, NULL) == -1)
88		err(1, "unveil");
89
90	if (ioctl(i.fd, TIOCGETD, &i.ldisc) == -1)
91		err(1, "TIOCGETD");
92
93	if (tcgetattr(i.fd, &i.t) == -1)
94		errx(1, "not a terminal");
95	if (ioctl(i.fd, TIOCGWINSZ, &i.win) == -1)
96		warn("TIOCGWINSZ");
97
98	switch(fmt) {
99	case NOTSET:
100		if (*argv)
101			break;
102		/* FALLTHROUGH */
103	case BSD:
104	case POSIX:
105		if (*argv)
106			errx(1, "either display or modify");
107		if (pledge("stdio", NULL) == -1)
108			err(1, "pledge");
109		print(&i.t, &i.win, i.ldisc, fmt);
110		break;
111	case GFLAG:
112		if (*argv)
113			errx(1, "either display or modify");
114		if (pledge("stdio", NULL) == -1)
115			err(1, "pledge");
116		gprint(&i.t, &i.win, i.ldisc);
117		break;
118	}
119
120	/*
121	 * Cannot pledge, because of "extproc", "ostart" and "ostop"
122	 */
123
124	for (i.set = i.wset = 0; *argv; ++argv) {
125		if (ksearch(&argv, &i))
126			continue;
127
128		if (csearch(&argv, &i))
129			continue;
130
131		if (msearch(&argv, &i))
132			continue;
133
134		if (isdigit((unsigned char)**argv)) {
135			const char *error;
136			int speed;
137
138			speed = strtonum(*argv, 0, INT_MAX, &error);
139			if (error)
140				err(1, "%s", *argv);
141			cfsetospeed(&i.t, speed);
142			cfsetispeed(&i.t, speed);
143			i.set = 1;
144			continue;
145		}
146
147		if (!strncmp(*argv, "gfmt1", sizeof("gfmt1") - 1)) {
148			gread(&i.t, *argv + sizeof("gfmt1") - 1);
149			i.set = 1;
150			continue;
151		}
152
153		warnx("illegal option -- %s", *argv);
154		usage();
155	}
156
157	if (i.set && tcsetattr(i.fd, 0, &i.t) == -1)
158		err(1, "tcsetattr");
159	if (i.wset && ioctl(i.fd, TIOCSWINSZ, &i.win) == -1)
160		warn("TIOCSWINSZ");
161	return (0);
162}
163
164void
165usage(void)
166{
167	fprintf(stderr, "usage: %s [-a | -e | -g] [-f file] [operands]\n",
168	    __progname);
169	exit (1);
170}
171