stty.c revision 8855 
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 *	$Id: stty.c,v 1.3 1995/04/29 15:00:34 bde Exp $
34 */
35
36#ifndef lint
37static char copyright[] =
38"@(#) Copyright (c) 1989, 1991, 1993, 1994\n\
39	The Regents of the University of California.  All rights reserved.\n";
40#endif /* not lint */
41
42#ifndef lint
43static char sccsid[] = "@(#)stty.c	8.3 (Berkeley) 4/2/94";
44#endif /* not lint */
45
46#include <sys/types.h>
47
48#include <ctype.h>
49#include <err.h>
50#include <errno.h>
51#include <fcntl.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55#include <unistd.h>
56
57#include "stty.h"
58#include "extern.h"
59
60int
61main(argc, argv)
62	int argc;
63	char *argv[];
64{
65	struct info i;
66	enum FMT fmt;
67	int ch;
68
69	fmt = NOTSET;
70	i.fd = STDIN_FILENO;
71
72	opterr = 0;
73	while (optind < argc &&
74	    strspn(argv[optind], "-aefg") == strlen(argv[optind]) &&
75	    (ch = getopt(argc, argv, "aef:g")) != EOF)
76		switch(ch) {
77		case 'a':		/* undocumented: POSIX compatibility */
78			fmt = POSIX;
79			break;
80		case 'e':
81			fmt = BSD;
82			break;
83		case 'f':
84			if ((i.fd = open(optarg, O_RDONLY | O_NONBLOCK)) < 0)
85				err(1, "%s", optarg);
86			break;
87		case 'g':
88			fmt = GFLAG;
89			break;
90		case '?':
91		default:
92			goto args;
93		}
94
95args:	argc -= optind;
96	argv += optind;
97
98	if (ioctl(i.fd, TIOCGETD, &i.ldisc) < 0)
99		err(1, "TIOCGETD");
100	if (tcgetattr(i.fd, &i.t) < 0)
101		err(1, "tcgetattr");
102	if (ioctl(i.fd, TIOCGWINSZ, &i.win) < 0)
103		warn("TIOCGWINSZ: %s\n", strerror(errno));
104
105	checkredirect();			/* conversion aid */
106
107	switch(fmt) {
108	case NOTSET:
109		if (*argv)
110			break;
111		/* FALLTHROUGH */
112	case BSD:
113	case POSIX:
114		print(&i.t, &i.win, i.ldisc, fmt);
115		break;
116	case GFLAG:
117		gprint(&i.t, &i.win, i.ldisc);
118		break;
119	}
120
121	for (i.set = i.wset = 0; *argv; ++argv) {
122		if (ksearch(&argv, &i))
123			continue;
124
125		if (csearch(&argv, &i))
126			continue;
127
128		if (msearch(&argv, &i))
129			continue;
130
131		if (isdigit(**argv)) {
132			int speed;
133
134			speed = atoi(*argv);
135			cfsetospeed(&i.t, speed);
136			cfsetispeed(&i.t, speed);
137			i.set = 1;
138			continue;
139		}
140
141		if (!strncmp(*argv, "gfmt1", sizeof("gfmt1") - 1)) {
142			gread(&i.t, *argv + sizeof("gfmt1") - 1);
143			i.set = 1;
144			continue;
145		}
146
147		warnx("illegal option -- %s", *argv);
148		usage();
149	}
150
151	if (i.set && tcsetattr(i.fd, 0, &i.t) < 0)
152		err(1, "tcsetattr");
153	if (i.wset && ioctl(i.fd, TIOCSWINSZ, &i.win) < 0)
154		warn("TIOCSWINSZ");
155	exit(0);
156}
157
158void
159usage()
160{
161
162	(void)fprintf(stderr, "usage: stty: [-a|-e|-g] [-f file] [options]\n");
163	exit (1);
164}
165