2 * SPDX-License-Identifier: BSD-4-Clause
4 * Copyright (c) 1993 Christopher G. Demetriou
5 * Copyright (c) 1988, 1990 Regents of the University of California.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 static const char copyright[] =
39 "@(#) Copyright (c) 1988 Regents of the University of California.\n\
40 All rights reserved.\n";
44 static const char sccsid[] = "from: @(#)wall.c 5.14 (Berkeley) 3/2/91";
47 #include <sys/cdefs.h>
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>
57 #include <rpcsvc/rwall.h>
69 static char notty[] = "no tty";
71 static void makemsg(const char *);
72 static void usage(void) __dead2;
76 main(int argc, char *argv[])
82 if ((argc < 2) || (argc > 3))
90 * Create client "handle" used for calling MESSAGEPROG on the
91 * server designated on the command line. We tell the rpc package
92 * to use the "tcp" protocol when contacting the server.
94 cl = clnt_create(wallhost, WALLPROG, WALLVERS, "udp");
97 * Couldn't establish connection with server.
98 * Print error message and die.
100 errx(1, "%s", clnt_spcreateerror(wallhost));
103 tv.tv_sec = 15; /* XXX ?? */
105 if (clnt_call(cl, WALLPROC_WALL, (xdrproc_t)xdr_wrapstring, &mbuf,
106 (xdrproc_t)xdr_void, &res, tv) != RPC_SUCCESS) {
108 * An error occurred while calling the server.
109 * Print error message and die.
111 errx(1, "%s", clnt_sperror(cl, wallhost));
120 fprintf(stderr, "usage: rwall host [file]\n");
125 makemsg(const char *fname)
134 char *tty, hostname[MAXHOSTNAMELEN], lbuf[256], tmpname[64];
137 snprintf(tmpname, sizeof(tmpname), "%s/wall.XXXXXX", _PATH_TMP);
138 if ((fd = mkstemp(tmpname)) == -1 || (fp = fdopen(fd, "r+")) == NULL)
139 err(1, "can't open temporary file");
144 pw = getpwuid(getuid());
145 whom = pw ? pw->pw_name : "???";
147 gethostname(hostname, sizeof(hostname));
149 lt = localtime(&now);
152 * all this stuff is to blank out a square for the message;
153 * we wrap message lines at column 79, not 80, because some
154 * terminals wrap after 79, some do not, and we can't tell.
155 * Which means that we may leave a non-blank character
156 * in column 80, but that can't be helped.
158 fprintf(fp, "Remote Broadcast Message from %s@%s\n",
160 tty = ttyname(STDERR_FILENO);
163 fprintf(fp, " (%s) at %d:%02d ...\n", tty,
164 lt->tm_hour, lt->tm_min);
168 if (fname && !(freopen(fname, "r", stdin)))
169 err(1, "can't read %s", fname);
170 while (fgets(lbuf, sizeof(lbuf), stdin))
174 if (fstat(fd, &sbuf))
175 err(1, "can't stat temporary file");
176 mbufsize = (size_t)sbuf.st_size;
177 mbuf = malloc(mbufsize);
179 err(1, "out of memory");
180 if (fread(mbuf, sizeof(*mbuf), mbufsize, fp) != (u_int)mbufsize)
181 err(1, "can't read temporary file");