stty.c revision 36152 
1/*-
2 * Copyright (c) 1989, 1991, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char const copyright[] =
36"@(#) Copyright (c) 1989, 1991, 1993, 1994\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)stty.c	8.3 (Berkeley) 4/2/94";
43#endif
44static const char rcsid[] =
45	"$Id$";
46#endif /* not lint */
47
48#include <sys/types.h>
49
50#include <ctype.h>
51#include <err.h>
52#include <errno.h>
53#include <fcntl.h>
54#include <stdio.h>
55#include <stdlib.h>
56#include <string.h>
57#include <unistd.h>
58
59#include "stty.h"
60#include "extern.h"
61
62int
63main(argc, argv)
64	int argc;
65	char *argv[];
66{
67	struct info i;
68	enum FMT fmt;
69	int ch;
70
71	fmt = NOTSET;
72	i.fd = STDIN_FILENO;
73
74	opterr = 0;
75	while (optind < argc &&
76	    strspn(argv[optind], "-aefg") == strlen(argv[optind]) &&
77	    (ch = getopt(argc, argv, "aef:g")) != -1)
78		switch(ch) {
79		case 'a':		/* undocumented: POSIX compatibility */
80			fmt = POSIX;
81			break;
82		case 'e':
83			fmt = BSD;
84			break;
85		case 'f':
86			if ((i.fd = open(optarg, O_RDONLY | O_NONBLOCK)) < 0)
87				err(1, "%s", optarg);
88			break;
89		case 'g':
90			fmt = GFLAG;
91			break;
92		case '?':
93		default:
94			goto args;
95		}
96
97args:	argc -= optind;
98	argv += optind;
99
100	if (tcgetattr(i.fd, &i.t) < 0)
101		errx(1, "stdin isn't a terminal");
102	if (ioctl(i.fd, TIOCGETD, &i.ldisc) < 0)
103		err(1, "TIOCGETD");
104	if (ioctl(i.fd, TIOCGWINSZ, &i.win) < 0)
105		warn("TIOCGWINSZ: %s\n", strerror(errno));
106
107	checkredirect();			/* conversion aid */
108
109	switch(fmt) {
110	case NOTSET:
111		if (*argv)
112			break;
113		/* FALLTHROUGH */
114	case BSD:
115	case POSIX:
116		print(&i.t, &i.win, i.ldisc, fmt);
117		break;
118	case GFLAG:
119		gprint(&i.t, &i.win, i.ldisc);
120		break;
121	}
122
123	for (i.set = i.wset = 0; *argv; ++argv) {
124		if (ksearch(&argv, &i))
125			continue;
126
127		if (csearch(&argv, &i))
128			continue;
129
130		if (msearch(&argv, &i))
131			continue;
132
133		if (isdigit(**argv)) {
134			int speed;
135
136			speed = atoi(*argv);
137			cfsetospeed(&i.t, speed);
138			cfsetispeed(&i.t, speed);
139			i.set = 1;
140			continue;
141		}
142
143		if (!strncmp(*argv, "gfmt1", sizeof("gfmt1") - 1)) {
144			gread(&i.t, *argv + sizeof("gfmt1") - 1);
145			i.set = 1;
146			continue;
147		}
148
149		warnx("illegal option -- %s", *argv);
150		usage();
151	}
152
153	if (i.set && tcsetattr(i.fd, 0, &i.t) < 0)
154		err(1, "tcsetattr");
155	if (i.wset && ioctl(i.fd, TIOCSWINSZ, &i.win) < 0)
156		warn("TIOCSWINSZ");
157	exit(0);
158}
159
160void
161usage()
162{
163
164	(void)fprintf(stderr, "usage: stty [-a|-e|-g] [-f file] [options]\n");
165	exit (1);
166}
167