1 /* $OpenBSD: ttyflags.c,v 1.11 2005/04/20 13:05:51 jmc Exp $ */
2 /* $NetBSD: ttyflags.c,v 1.8 1996/04/09 05:20:30 cgd Exp $ */
3
4 /*
5 * Copyright (c) 1996 Theo de Raadt
6 * Copyright (c) 1994 Christopher G. Demetriou
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by Christopher G. Demetriou.
20 * 4. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #ifndef lint
36 char copyright[] =
37 "@(#) Copyright (c) 1994 Christopher G. Demetriou\n\
38 All rights reserved.\n";
39 #endif /* not lint */
40
41 #ifndef lint
42 static char rcsid[] = "$OpenBSD: ttyflags.c,v 1.11 2005/04/20 13:05:51 jmc Exp $";
43 #endif /* not lint */
44
45 #include <sys/types.h>
46 #include <sys/cdefs.h>
47 #include <sys/ioctl.h>
48
49 #include <err.h>
50 #include <errno.h>
51 #include <fcntl.h>
52 #include <limits.h>
53 #include <paths.h>
54 #include <stdio.h>
55 #include <stdlib.h>
56 #include <string.h>
57 #include <ttyent.h>
58 #include <unistd.h>
59
60 int all(int);
61 int ttys(char **, int);
62 int ttyflags(struct ttyent *, int);
63 void usage(void);
64
65 int nflag, vflag;
66
67 /*
68 * Ttyflags sets the device-specific tty flags, based on the contents
69 * of /etc/ttys. It can either set all of the ttys' flags, or set
70 * the flags of the ttys specified on the command line.
71 */
72 int
main(int argc,char * argv[])73 main(int argc, char *argv[])
74 {
75 int aflag, ch, rval, pflag = 0;
76
77 aflag = nflag = vflag = 0;
78 while ((ch = getopt(argc, argv, "panv")) != -1)
79 switch (ch) {
80 case 'a':
81 aflag = 1;
82 break;
83 case 'n': /* undocumented */
84 nflag = 1;
85 break;
86 case 'p':
87 pflag = 1;
88 break;
89 case 'v':
90 vflag = 1;
91 break;
92 case '?':
93 default:
94 usage();
95 }
96 argc -= optind;
97 argv += optind;
98
99 if (aflag && argc != 0)
100 usage();
101
102 if (setttyent() == 0)
103 err(1, "setttyent");
104
105 if (aflag)
106 rval = all(pflag);
107 else
108 rval = ttys(argv, pflag);
109
110 if (endttyent() == 0)
111 warn("endttyent");
112
113 exit(rval);
114 }
115
116 /*
117 * Change all /etc/ttys entries' flags.
118 */
119 int
all(int print)120 all(int print)
121 {
122 struct ttyent *tep;
123 int rval;
124
125 rval = 0;
126 for (tep = getttyent(); tep != NULL; tep = getttyent())
127 if (ttyflags(tep, print))
128 rval = 1;
129 return (rval);
130 }
131
132 /*
133 * Change the specified ttys' flags.
134 */
135 int
ttys(char ** ttylist,int print)136 ttys(char **ttylist, int print)
137 {
138 struct ttyent *tep;
139 int rval;
140
141 rval = 0;
142 for (; *ttylist != NULL; ttylist++) {
143 tep = getttynam(*ttylist);
144 if (tep == NULL) {
145 warnx("couldn't find an entry in %s for \"%s\"",
146 _PATH_TTYS, *ttylist);
147 rval = 1;
148 continue;
149 }
150
151 if (ttyflags(tep, print))
152 rval = 1;
153 }
154 return (rval);
155 }
156
157
158 /*
159 * Actually do the work; find out what the new flags value should be,
160 * open the device, and change the flags.
161 */
162 int
ttyflags(struct ttyent * tep,int print)163 ttyflags(struct ttyent *tep, int print)
164 {
165 int fd, flags = 0, rval = 0, st, sep = 0;
166 char path[PATH_MAX];
167 char strflags[256];
168
169 st = tep->ty_status;
170 strflags[0] = '\0';
171
172 /* Find the full device path name. */
173 (void)snprintf(path, sizeof path, "%s%s", _PATH_DEV, tep->ty_name);
174
175 if (print == 0) {
176 /* Convert ttyent.h flags into ioctl flags. */
177 if (st & TTY_LOCAL) {
178 flags |= TIOCFLAG_CLOCAL;
179 (void)strlcat(strflags, "local", sizeof strflags);
180 sep++;
181 }
182 if (st & TTY_RTSCTS) {
183 flags |= TIOCFLAG_CRTSCTS;
184 if (sep++)
185 (void)strlcat(strflags, "|", sizeof strflags);
186 (void)strlcat(strflags, "rtscts", sizeof strflags);
187 }
188 if (st & TTY_SOFTCAR) {
189 flags |= TIOCFLAG_SOFTCAR;
190 if (sep++)
191 (void)strlcat(strflags, "|", sizeof strflags);
192 (void)strlcat(strflags, "softcar", sizeof strflags);
193 }
194 if (st & TTY_MDMBUF) {
195 flags |= TIOCFLAG_MDMBUF;
196 if (sep++)
197 (void)strlcat(strflags, "|", sizeof strflags);
198 (void)strlcat(strflags, "mdmbuf", sizeof strflags);
199 }
200 if (vflag)
201 printf("%s setting flags to: %s\n", path, strflags);
202 }
203
204 if (nflag)
205 return (0);
206
207 /* Open the device NON-BLOCKING, set the flags, and close it. */
208 if ((fd = open(path, O_RDONLY | O_NONBLOCK, 0)) == -1) {
209 if (!(errno == ENXIO ||
210 (errno == ENOENT && (st & TTY_ON) == 0)))
211 rval = 1;
212 if (vflag)
213 warn("open %s", path);
214 return (rval);
215 }
216 if (print == 0) {
217 if (ioctl(fd, TIOCSFLAGS, &flags) == -1)
218 if (errno != ENOTTY || vflag) {
219 warn("TIOCSFLAGS on %s", path);
220 rval = (errno != ENOTTY);
221 }
222 } else {
223 if (ioctl(fd, TIOCGFLAGS, &flags) == -1)
224 if (errno != ENOTTY || vflag) {
225 warn("TIOCGFLAGS on %s", path);
226 rval = (errno != ENOTTY);
227 }
228 if (flags & TIOCFLAG_CLOCAL) {
229 (void)strlcat(strflags, "local", sizeof strflags);
230 sep++;
231 }
232 if (flags & TIOCFLAG_CRTSCTS) {
233 if (sep++)
234 (void)strlcat(strflags, "|", sizeof strflags);
235 (void)strlcat(strflags, "rtscts", sizeof strflags);
236 }
237 if (flags & TIOCFLAG_SOFTCAR) {
238 if (sep++)
239 (void)strlcat(strflags, "|", sizeof strflags);
240 (void)strlcat(strflags, "softcar", sizeof strflags);
241 }
242 if (flags & TIOCFLAG_MDMBUF) {
243 if (sep++)
244 (void)strlcat(strflags, "|", sizeof strflags);
245 (void)strlcat(strflags, "mdmbuf", sizeof strflags);
246 }
247 printf("%s flags are: %s\n", path, strflags);
248 }
249 if (close(fd) == -1) {
250 warn("close %s", path);
251 return (1);
252 }
253 return (rval);
254 }
255
256 /*
257 * Print usage information when a bogus set of arguments is given.
258 */
259 void
usage(void)260 usage(void)
261 {
262 (void)fprintf(stderr, "usage: ttyflags [-pv] [-a | tty ...]\n");
263 exit(1);
264 }
265