Add some missing $DragonFly$ keywords.
[dragonfly.git] / usr.bin / rwall / rwall.c
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1/*
2 * Copyright (c) 1993 Christopher G. Demetriou
3 * Copyright (c) 1988, 1990 Regents of the University of California.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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.
21 *
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
32 * SUCH DAMAGE.
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33 *
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 $
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38 */
39
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40/*
41 * This program is not related to David Wall, whose Stanford Ph.D. thesis
42 * is entitled "Mechanisms for Broadcast and Selective Broadcast".
43 */
44
45#include <sys/param.h>
46#include <sys/stat.h>
47#include <sys/time.h>
48#include <sys/uio.h>
49#include <err.h>
50#include <paths.h>
51#include <pwd.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55#include <time.h>
56#include <unistd.h>
57#include <utmp.h>
58
59#include <rpc/rpc.h>
60#include <rpcsvc/rwall.h>
61
62int mbufsize;
63char *mbuf;
64
65void makemsg __P((char *));
66static void usage __P((void));
67char *ttymsg __P((struct iovec *, int, char *, int));
68
69/* ARGSUSED */
70int
71main(argc, argv)
72 int argc;
73 char **argv;
74{
75 char *wallhost, res;
76 CLIENT *cl;
77 struct timeval tv;
78
79 if ((argc < 2) || (argc > 3))
80 usage();
81
82 wallhost = argv[1];
83
84 makemsg(argv[2]);
85
86 /*
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.
90 */
91 cl = clnt_create(wallhost, WALLPROG, WALLVERS, "udp");
92 if (cl == NULL) {
93 /*
94 * Couldn't establish connection with server.
95 * Print error message and die.
96 */
97 errx(1, "%s", clnt_spcreateerror(wallhost));
98 }
99
100 tv.tv_sec = 15; /* XXX ?? */
101 tv.tv_usec = 0;
102 if (clnt_call(cl, WALLPROC_WALL, xdr_wrapstring, &mbuf, xdr_void, &res, tv) != RPC_SUCCESS) {
103 /*
104 * An error occurred while calling the server.
105 * Print error message and die.
106 */
107 errx(1, "%s", clnt_sperror(cl, wallhost));
108 }
109
110 exit(0);
111}
112
113static void
114usage()
115{
116 (void)fprintf(stderr, "usage: rwall hostname [file]\n");
117 exit(1);
118}
119
120void
121makemsg(fname)
122 char *fname;
123{
124 struct tm *lt;
125 struct passwd *pw;
126 struct stat sbuf;
127 time_t now;
128 FILE *fp;
129 int fd;
130 char *tty, hostname[MAXHOSTNAMELEN], lbuf[256], tmpname[64];
131 const char *whom;
132
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);
137
138 if (!(whom = getlogin()))
139 whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
140 (void)gethostname(hostname, sizeof(hostname));
141 (void)time(&now);
142 lt = localtime(&now);
143
144 /*
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.
150 */
151 (void)fprintf(fp, "Remote Broadcast Message from %s@%s\n",
152 whom, hostname);
153 tty = ttyname(STDERR_FILENO);
154 if (tty == NULL)
155 tty = "no tty";
156 (void)fprintf(fp, " (%s) at %d:%02d ...\n", tty,
157 lt->tm_hour, lt->tm_min);
158
159 putc('\n', fp);
160
161 if (fname && !(freopen(fname, "r", stdin)))
162 err(1, "can't read %s", fname);
163 while (fgets(lbuf, sizeof(lbuf), stdin))
164 fputs(lbuf, fp);
165 rewind(fp);
166
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");
174 (void)close(fd);
175}