stty.c revision 1.7 
1/*-
2 * Copyright (c) 1989, 1991 The Regents of the University of California.
3 * 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
35char copyright[] =
36"@(#) Copyright (c) 1989, 1991 The Regents of the University of California.\n\
37 All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41/*static char sccsid[] = "from: @(#)stty.c	5.28 (Berkeley) 6/5/91";*/
42static char rcsid[] = "$Id: stty.c,v 1.7 1993/08/01 18:57:36 mycroft Exp $";
43#endif /* not lint */
44
45#include <sys/types.h>
46#include <fcntl.h>
47#include <errno.h>
48#include <unistd.h>
49#include <stdio.h>
50#include <ctype.h>
51#include <stdlib.h>
52#include <string.h>
53#include "stty.h"
54#include "extern.h"
55
56char *usage = "usage: stty: [-eg] [-f file] [options]";
57
58main(argc, argv)
59	int argc;
60	char **argv;
61{
62	struct info i;
63	enum FMT fmt;
64	int ch;
65
66	fmt = NOTSET;
67	i.fd = STDIN_FILENO;
68
69	opterr = 0;
70	while (argv[optind] &&
71	       strspn(argv[optind], "-aefg") == strlen(argv[optind]) &&
72	       (ch = getopt(argc, argv, "aef:g")) != EOF)
73		switch(ch) {
74		case 'a':		/* undocumented: POSIX compatibility */
75			fmt = POSIX;
76			break;
77		case 'e':
78			fmt = BSD;
79			break;
80		case 'f':
81			if ((i.fd = open(optarg, O_RDONLY | O_NONBLOCK)) < 0)
82				err("%s: %s", optarg, strerror(errno));
83			break;
84		case 'g':
85			fmt = GFLAG;
86			break;
87		case '?':
88		default:
89			goto args;
90		}
91
92args:	argc -= optind;
93	argv += optind;
94
95	if (ioctl(i.fd, TIOCGETD, &i.ldisc) < 0)
96		err("TIOCGETD: %s", strerror(errno));
97	if (tcgetattr(i.fd, &i.t) < 0)
98		err("tcgetattr: %s", strerror(errno));
99	if (ioctl(i.fd, TIOCGWINSZ, &i.win) < 0)
100		warn("TIOCGWINSZ: %s\n", strerror(errno));
101
102	checkredirect();			/* conversion aid */
103
104	switch(fmt) {
105	case NOTSET:
106		if (*argv)
107			break;
108		/* FALLTHROUGH */
109	case BSD:
110	case POSIX:
111		print(&i.t, &i.win, i.ldisc, fmt);
112		break;
113	case GFLAG:
114		gprint(&i.t, &i.win, i.ldisc);
115		break;
116	}
117
118	for (i.set = i.wset = 0; *argv; ++argv) {
119		if (ksearch(&argv, &i))
120			continue;
121
122		if (csearch(&argv, &i))
123			continue;
124
125		if (msearch(&argv, &i))
126			continue;
127
128		if (isdigit(**argv)) {
129			int speed;
130
131			speed = atoi(*argv);
132			cfsetospeed(&i.t, speed);
133			cfsetispeed(&i.t, speed);
134			i.set = 1;
135			continue;
136		}
137
138		if (!strncmp(*argv, "gfmt1", sizeof("gfmt1") - 1)) {
139			gread(&i.t, *argv + sizeof("gfmt1") - 1);
140			i.set = 1;
141			continue;
142		}
143
144		err("illegal option -- %s\n%s", *argv, usage);
145	}
146
147	if (i.set && tcsetattr(i.fd, 0, &i.t) < 0)
148		err("tcsetattr: %s", strerror(errno));
149	if (i.wset && ioctl(i.fd, TIOCSWINSZ, &i.win) < 0)
150		warn("TIOCSWINSZ: %s", strerror(errno));
151	exit(0);
152}
153