2 * Copyright (c) 1983, 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
36 static char sccsid[] = "@(#)announce.c 8.3 (Berkeley) 4/28/95";
38 static const char rcsid[] =
39 "$FreeBSD: src/libexec/talkd/announce.c,v 1.11.2.3 2001/10/18 12:30:42 des Exp $";
42 #include <sys/types.h>
47 #include <sys/socket.h>
49 #include <protocols/talkd.h>
62 extern char hostname[];
64 int print_mesg __P((char *, FILE *, CTL_MSG *, char *));
67 * Announce an invitation to talk.
71 * See if the user is accepting messages. If so, announce that
72 * a talk is requested.
75 announce(request, remote_machine)
83 (void)snprintf(full_tty, sizeof(full_tty),
84 "%s%s", _PATH_DEV, request->r_tty);
85 if (stat(full_tty, &stbuf) < 0 || (stbuf.st_mode&020) == 0)
86 return (PERMISSION_DENIED);
87 return (print_mesg(request->r_tty, tf, request, remote_machine));
90 #define max(a,b) ( (a) > (b) ? (a) : (b) )
95 * Build a block of characters containing the message.
96 * It is sent blank filled and in a single block to
97 * try to keep the message in one piece if the recipient
98 * in in vi at the time
101 print_mesg(tty, tf, request, remote_machine)
105 char *remote_machine;
107 struct timeval clock;
109 struct timezone zone;
110 struct tm *localtime();
111 struct tm *localclock;
113 char line_buf[N_LINES][N_CHARS];
115 char big_buf[N_LINES*N_CHARS];
116 char *bptr, *lptr, *vis_user;
121 gettimeofday(&clock, &zone);
122 clock_sec = clock.tv_sec;
123 localclock = localtime(&clock_sec);
124 (void)snprintf(line_buf[i], N_CHARS, " ");
125 sizes[i] = strlen(line_buf[i]);
126 max_size = max(max_size, sizes[i]);
128 (void)snprintf(line_buf[i], N_CHARS,
129 "Message from Talk_Daemon@%s at %d:%02d on %d/%.2d/%.2d ...",
130 hostname, localclock->tm_hour , localclock->tm_min,
131 localclock->tm_year + 1900, localclock->tm_mon + 1,
132 localclock->tm_mday);
133 sizes[i] = strlen(line_buf[i]);
134 max_size = max(max_size, sizes[i]);
137 vis_user = malloc(strlen(request->l_name) * 4 + 1);
138 strvis(vis_user, request->l_name, VIS_CSTYLE);
139 (void)snprintf(line_buf[i], N_CHARS,
140 "talk: connection requested by %s@%s", vis_user, remote_machine);
141 sizes[i] = strlen(line_buf[i]);
142 max_size = max(max_size, sizes[i]);
144 (void)snprintf(line_buf[i], N_CHARS, "talk: respond with: talk %s@%s",
145 vis_user, remote_machine);
146 sizes[i] = strlen(line_buf[i]);
147 max_size = max(max_size, sizes[i]);
149 (void)snprintf(line_buf[i], N_CHARS, " ");
150 sizes[i] = strlen(line_buf[i]);
151 max_size = max(max_size, sizes[i]);
154 *bptr++ = '\007'; /* send something to wake them up */
155 *bptr++ = '\r'; /* add a \r in case of raw mode */
157 for (i = 0; i < N_LINES; i++) {
158 /* copy the line into the big buffer */
160 while (*lptr != '\0')
161 *(bptr++) = *(lptr++);
162 /* pad out the rest of the lines with blanks */
163 for (j = sizes[i]; j < max_size + 2; j++)
165 *(bptr++) = '\r'; /* add a \r in case of raw mode */
169 iovec.iov_base = big_buf;
170 iovec.iov_len = bptr - big_buf;
172 * we choose a timeout of RING_WAIT-5 seconds so that we don't
173 * stack up processes trying to write messages to a tty
174 * that is permanently blocked.
176 if (ttymsg(&iovec, 1, tty, RING_WAIT - 5) != NULL)