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
50 int
main(int argc,char * argv[])51 main(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
82 args: 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
164 void
usage(void)165 usage(void)
166 {
167 fprintf(stderr, "usage: %s [-a | -e | -g] [-f file] [operands]\n",
168 __progname);
169 exit (1);
170 }
171