2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1988, 1990, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
37 static const char copyright[] =
38 "@(#) Copyright (c) 1988, 1990, 1993\n\
39 The Regents of the University of California. All rights reserved.\n";
43 static const char sccsid[] = "@(#)wall.c 8.2 (Berkeley) 11/16/93";
47 * This program is not related to David Wall, whose Stanford Ph.D. thesis
48 * is entitled "Mechanisms for Broadcast and Selective Broadcast".
51 #include <sys/param.h>
72 static void makemsg(char *);
73 static void usage(void);
75 static struct wallgroup {
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 hostname[MAXHOSTNAMELEN], tmpname[64];
200 wchar_t *p, *tmp, lbuf[256], codebuf[13];
205 (void)snprintf(tmpname, sizeof(tmpname), "%s/wall.XXXXXX", _PATH_TMP);
206 if ((fd = mkstemp(tmpname)) == -1 || !(fp = fdopen(fd, "r+")))
207 err(1, "can't open temporary file");
208 (void)unlink(tmpname);
211 tty = ttyname(STDERR_FILENO);
215 if (!(whom = getlogin()))
216 whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
217 (void)gethostname(hostname, sizeof(hostname));
219 lt = localtime(&now);
222 * all this stuff is to blank out a square for the message;
223 * we wrap message lines at column 79, not 80, because some
224 * terminals wrap after 79, some do not, and we can't tell.
225 * Which means that we may leave a non-blank character
226 * in column 80, but that can't be helped.
228 (void)fwprintf(fp, L"\r%79s\r\n", " ");
229 (void)swprintf(lbuf, sizeof(lbuf)/sizeof(wchar_t),
230 L"Broadcast Message from %s@%s",
232 (void)fwprintf(fp, L"%-79.79S\007\007\r\n", lbuf);
233 (void)swprintf(lbuf, sizeof(lbuf)/sizeof(wchar_t),
234 L" (%s) at %d:%02d %s...", tty,
235 lt->tm_hour, lt->tm_min, lt->tm_zone);
236 (void)fwprintf(fp, L"%-79.79S\r\n", lbuf);
238 (void)fwprintf(fp, L"%79s\r\n", " ");
243 if (freopen(fname, "r", stdin) == NULL)
244 err(1, "can't read %s", fname);
245 if (setegid(egid) != 0)
246 err(1, "setegid failed");
249 while (fgetws(lbuf, sizeof(lbuf)/sizeof(wchar_t), stdin)) {
250 for (p = lbuf; (ch = *p) != L'\0'; ++p, ++cnt) {
255 } else if (ch == L'\n') {
256 for (; cnt < 79; ++cnt)
267 if (iswprint(ch) || iswspace(ch) || ch == L'\a' || ch == L'\b') {
270 (void)swprintf(codebuf, sizeof(codebuf)/sizeof(wchar_t), L"<0x%X>", ch);
271 for (tmp = codebuf; *tmp != L'\0'; ++tmp) {
283 (void)fwprintf(fp, L"%79s\r\n", " ");
286 if (fstat(fd, &sbuf))
287 err(1, "can't stat temporary file");
288 mbufsize = sbuf.st_size;
289 if (!(mbuf = malloc((u_int)mbufsize)))
290 err(1, "out of memory");
291 if ((int)fread(mbuf, sizeof(*mbuf), mbufsize, fp) != mbufsize)
292 err(1, "can't read temporary file");