2 * Copyright (c) 1993 Christopher G. Demetriou
3 * Copyright (c) 1988, 1990 Regents of the University of California.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by the University of
17 * California, Berkeley and its contributors.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * @(#) Copyright (c) 1988 Regents of the University of California. All rights reserved.
35 * @(#)wall.c 5.14 (Berkeley) 3/2/91
36 * $FreeBSD: src/usr.bin/rwall/rwall.c,v 1.8.2.1 2001/02/18 02:27:54 kris Exp $
37 * $DragonFly: src/usr.bin/rwall/rwall.c,v 1.2 2003/06/17 04:29:31 dillon Exp $
41 * This program is not related to David Wall, whose Stanford Ph.D. thesis
42 * is entitled "Mechanisms for Broadcast and Selective Broadcast".
45 #include <sys/param.h>
60 #include <rpcsvc/rwall.h>
65 void makemsg __P((char *));
66 static void usage __P((void));
67 char *ttymsg __P((struct iovec *, int, char *, int));
79 if ((argc < 2) || (argc > 3))
87 * Create client "handle" used for calling MESSAGEPROG on the
88 * server designated on the command line. We tell the rpc package
89 * to use the "tcp" protocol when contacting the server.
91 cl = clnt_create(wallhost, WALLPROG, WALLVERS, "udp");
94 * Couldn't establish connection with server.
95 * Print error message and die.
97 errx(1, "%s", clnt_spcreateerror(wallhost));
100 tv.tv_sec = 15; /* XXX ?? */
102 if (clnt_call(cl, WALLPROC_WALL, xdr_wrapstring, &mbuf, xdr_void, &res, tv) != RPC_SUCCESS) {
104 * An error occurred while calling the server.
105 * Print error message and die.
107 errx(1, "%s", clnt_sperror(cl, wallhost));
116 (void)fprintf(stderr, "usage: rwall hostname [file]\n");
130 char *tty, hostname[MAXHOSTNAMELEN], lbuf[256], tmpname[64];
133 (void)snprintf(tmpname, sizeof(tmpname), "%s/wall.XXXXXX", _PATH_TMP);
134 if ((fd = mkstemp(tmpname)) == -1 || !(fp = fdopen(fd, "r+")))
135 err(1, "can't open temporary file");
136 (void)unlink(tmpname);
138 if (!(whom = getlogin()))
139 whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
140 (void)gethostname(hostname, sizeof(hostname));
142 lt = localtime(&now);
145 * all this stuff is to blank out a square for the message;
146 * we wrap message lines at column 79, not 80, because some
147 * terminals wrap after 79, some do not, and we can't tell.
148 * Which means that we may leave a non-blank character
149 * in column 80, but that can't be helped.
151 (void)fprintf(fp, "Remote Broadcast Message from %s@%s\n",
153 tty = ttyname(STDERR_FILENO);
156 (void)fprintf(fp, " (%s) at %d:%02d ...\n", tty,
157 lt->tm_hour, lt->tm_min);
161 if (fname && !(freopen(fname, "r", stdin)))
162 err(1, "can't read %s", fname);
163 while (fgets(lbuf, sizeof(lbuf), stdin))
167 if (fstat(fd, &sbuf))
168 err(1, "can't stat temporary file");
169 mbufsize = sbuf.st_size;
170 if (!(mbuf = malloc((u_int)mbufsize)))
171 err(1, "out of memory");
172 if (fread(mbuf, sizeof(*mbuf), mbufsize, fp) != mbufsize)
173 err(1, "can't read temporary file");