2 * Copyright (c) 1988, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
34 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 static const char copyright[] =
40 "@(#) Copyright (c) 1988, 1990, 1993\n\
41 The Regents of the University of California. All rights reserved.\n";
45 static const char sccsid[] = "@(#)wall.c 8.2 (Berkeley) 11/16/93";
49 * This program is not related to David Wall, whose Stanford Ph.D. thesis
50 * is entitled "Mechanisms for Broadcast and Selective Broadcast".
53 #include <sys/param.h>
72 static void makemsg(char *);
73 static void usage(void);
76 struct wallgroup *next;
88 char ttybuf[MAXPATHLEN];
90 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line);
91 if (stat(ttybuf, &sb) == 0) {
98 main(int argc, char *argv[])
110 (void)setlocale(LC_CTYPE, "");
112 while ((ch = getopt(argc, argv, "g:n")) != -1)
115 /* undoc option for shutdown: suppress banner */
120 g = (struct wallgroup *)malloc(sizeof *g);
135 for (g = grouplist; g; g = g->next) {
136 grp = getgrnam(g->name);
138 g->gid = grp->gr_gid;
140 warnx("%s: no such group", g->name);
146 iov.iov_len = mbufsize;
148 while ((utmp = getutxent()) != NULL) {
149 if (utmp->ut_type != USER_PROCESS)
151 if (ttystat(utmp->ut_line) != 0)
155 pw = getpwnam(utmp->ut_user);
158 for (g = grouplist; g && ingroup == 0; g = g->next) {
159 if (g->gid == (gid_t)-1)
161 if (g->gid == pw->pw_gid)
163 else if ((grp = getgrgid(g->gid)) != NULL) {
164 for (np = grp->gr_mem; *np; np++) {
165 if (strcmp(*np, utmp->ut_user) == 0) {
175 if ((p = ttymsg(&iov, 1, utmp->ut_line, 60*5)) != NULL)
184 (void)fprintf(stderr, "usage: wall [-g group] [file]\n");
199 char *p, hostname[MAXHOSTNAMELEN], lbuf[256], tmpname[64];
204 (void)snprintf(tmpname, sizeof(tmpname), "%s/wall.XXXXXX", _PATH_TMP);
205 if ((fd = mkstemp(tmpname)) == -1 || !(fp = fdopen(fd, "r+")))
206 err(1, "can't open temporary file");
207 (void)unlink(tmpname);
210 tty = ttyname(STDERR_FILENO);
214 if (!(whom = getlogin()))
215 whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
216 (void)gethostname(hostname, sizeof(hostname));
218 lt = localtime(&now);
221 * all this stuff is to blank out a square for the message;
222 * we wrap message lines at column 79, not 80, because some
223 * terminals wrap after 79, some do not, and we can't tell.
224 * Which means that we may leave a non-blank character
225 * in column 80, but that can't be helped.
227 (void)fprintf(fp, "\r%79s\r\n", " ");
228 (void)snprintf(lbuf, sizeof(lbuf),
229 "Broadcast Message from %s@%s",
231 (void)fprintf(fp, "%-79.79s\007\007\r\n", lbuf);
232 (void)snprintf(lbuf, sizeof(lbuf),
233 " (%s) at %d:%02d %s...", tty,
234 lt->tm_hour, lt->tm_min, lt->tm_zone);
235 (void)fprintf(fp, "%-79.79s\r\n", lbuf);
237 (void)fprintf(fp, "%79s\r\n", " ");
242 if (freopen(fname, "r", stdin) == NULL)
243 err(1, "can't read %s", fname);
246 while (fgets(lbuf, sizeof(lbuf), stdin)) {
247 for (cnt = 0, p = lbuf; (ch = *p) != '\0'; ++p, ++cnt) {
252 } else if (ch == '\n') {
253 for (; cnt < 79; ++cnt)
264 if (((ch & 0x80) && ch < 0xA0) ||
265 /* disable upper controls */
266 (!isprint(ch) && !isspace(ch) &&
267 ch != '\a' && ch != '\b')
297 (void)fprintf(fp, "%79s\r\n", " ");
300 if (fstat(fd, &sbuf))
301 err(1, "can't stat temporary file");
302 mbufsize = sbuf.st_size;
303 if (!(mbuf = malloc((u_int)mbufsize)))
304 err(1, "out of memory");
305 if ((int)fread(mbuf, sizeof(*mbuf), mbufsize, fp) != mbufsize)
306 err(1, "can't read temporary file");