stty.c revision 141578 
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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if 0
31#ifndef lint
32static char const copyright[] =
33"@(#) Copyright (c) 1989, 1991, 1993, 1994\n\
34	The Regents of the University of California.  All rights reserved.\n";
35#endif /* not lint */
36
37#ifndef lint
38static char sccsid[] = "@(#)stty.c	8.3 (Berkeley) 4/2/94";
39#endif /* not lint */
40#endif
41#include <sys/cdefs.h>
42__FBSDID("$FreeBSD: head/bin/stty/stty.c 141578 2005-02-09 17:37:39Z ru $");
43
44#include <sys/types.h>
45
46#include <ctype.h>
47#include <err.h>
48#include <errno.h>
49#include <fcntl.h>
50#include <stdio.h>
51#include <stdlib.h>
52#include <string.h>
53#include <unistd.h>
54
55#include "stty.h"
56#include "extern.h"
57
58int
59main(int argc, char *argv[])
60{
61	struct info i;
62	enum FMT fmt;
63	int ch;
64
65	fmt = NOTSET;
66	i.fd = STDIN_FILENO;
67
68	opterr = 0;
69	while (optind < argc &&
70	    strspn(argv[optind], "-aefg") == strlen(argv[optind]) &&
71	    (ch = getopt(argc, argv, "aef:g")) != -1)
72		switch(ch) {
73		case 'a':		/* undocumented: POSIX compatibility */
74			fmt = POSIX;
75			break;
76		case 'e':
77			fmt = BSD;
78			break;
79		case 'f':
80			if ((i.fd = open(optarg, O_RDONLY | O_NONBLOCK)) < 0)
81				err(1, "%s", optarg);
82			break;
83		case 'g':
84			fmt = GFLAG;
85			break;
86		case '?':
87		default:
88			goto args;
89		}
90
91args:	argc -= optind;
92	argv += optind;
93
94	if (tcgetattr(i.fd, &i.t) < 0)
95		errx(1, "stdin isn't a terminal");
96	if (ioctl(i.fd, TIOCGETD, &i.ldisc) < 0)
97		err(1, "TIOCGETD");
98	if (ioctl(i.fd, TIOCGWINSZ, &i.win) < 0)
99		warn("TIOCGWINSZ");
100
101	checkredirect();			/* conversion aid */
102
103	switch(fmt) {
104	case NOTSET:
105		if (*argv)
106			break;
107		/* FALLTHROUGH */
108	case BSD:
109	case POSIX:
110		print(&i.t, &i.win, i.ldisc, fmt);
111		break;
112	case GFLAG:
113		gprint(&i.t, &i.win, i.ldisc);
114		break;
115	}
116
117	for (i.set = i.wset = 0; *argv; ++argv) {
118		if (ksearch(&argv, &i))
119			continue;
120
121		if (csearch(&argv, &i))
122			continue;
123
124		if (msearch(&argv, &i))
125			continue;
126
127		if (isdigit(**argv)) {
128			speed_t speed;
129
130			speed = atoi(*argv);
131			cfsetospeed(&i.t, speed);
132			cfsetispeed(&i.t, speed);
133			i.set = 1;
134			continue;
135		}
136
137		if (!strncmp(*argv, "gfmt1", sizeof("gfmt1") - 1)) {
138			gread(&i.t, *argv + sizeof("gfmt1") - 1);
139			i.set = 1;
140			continue;
141		}
142
143		warnx("illegal option -- %s", *argv);
144		usage();
145	}
146
147	if (i.set && tcsetattr(i.fd, 0, &i.t) < 0)
148		err(1, "tcsetattr");
149	if (i.wset && ioctl(i.fd, TIOCSWINSZ, &i.win) < 0)
150		warn("TIOCSWINSZ");
151	exit(0);
152}
153
154void
155usage(void)
156{
157
158	(void)fprintf(stderr,
159	    "usage: stty [-a | -e | -g] [-f file] [arguments]\n");
160	exit (1);
161}
162