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[] =
42 #include <sys/types.h>
47 #include <sys/socket.h>
49 #include <protocols/talkd.h>
63 extern char hostname[];
66 * Announce an invitation to talk.
70 * See if the user is accepting messages. If so, announce that
71 * a talk is requested.
74 announce(CTL_MSG *request, const char *remote_machine)
80 (void)snprintf(full_tty, sizeof(full_tty),
81 "%s%s", _PATH_DEV, request->r_tty);
82 if (stat(full_tty, &stbuf) < 0 || (stbuf.st_mode&020) == 0)
83 return (PERMISSION_DENIED);
84 return (print_mesg(request->r_tty, tf, request, remote_machine));
87 #define max(a,b) ( (a) > (b) ? (a) : (b) )
92 * Build a block of characters containing the message.
93 * It is sent blank filled and in a single block to
94 * try to keep the message in one piece if the recipient
95 * in in vi at the time
98 print_mesg(const char *tty, FILE *tf, CTL_MSG *request,
99 const char *remote_machine)
101 struct timeval clock;
103 struct timezone zone;
104 struct tm *localtime();
105 struct tm *localclock;
107 char line_buf[N_LINES][N_CHARS];
109 char big_buf[N_LINES*N_CHARS];
110 char *bptr, *lptr, *vis_user;
115 gettimeofday(&clock, &zone);
116 clock_sec = clock.tv_sec;
117 localclock = localtime(&clock_sec);
118 (void)snprintf(line_buf[i], N_CHARS, " ");
119 sizes[i] = strlen(line_buf[i]);
120 max_size = max(max_size, sizes[i]);
122 (void)snprintf(line_buf[i], N_CHARS,
123 "Message from Talk_Daemon@%s at %d:%02d on %d/%.2d/%.2d ...",
124 hostname, localclock->tm_hour , localclock->tm_min,
125 localclock->tm_year + 1900, localclock->tm_mon + 1,
126 localclock->tm_mday);
127 sizes[i] = strlen(line_buf[i]);
128 max_size = max(max_size, sizes[i]);
131 vis_user = malloc(strlen(request->l_name) * 4 + 1);
132 strvis(vis_user, request->l_name, VIS_CSTYLE);
133 (void)snprintf(line_buf[i], N_CHARS,
134 "talk: connection requested by %s@%s", vis_user, remote_machine);
135 sizes[i] = strlen(line_buf[i]);
136 max_size = max(max_size, sizes[i]);
138 (void)snprintf(line_buf[i], N_CHARS, "talk: respond with: talk %s@%s",
139 vis_user, remote_machine);
140 sizes[i] = strlen(line_buf[i]);
141 max_size = max(max_size, sizes[i]);
143 (void)snprintf(line_buf[i], N_CHARS, " ");
144 sizes[i] = strlen(line_buf[i]);
145 max_size = max(max_size, sizes[i]);
148 *bptr++ = '\007'; /* send something to wake them up */
149 *bptr++ = '\r'; /* add a \r in case of raw mode */
151 for (i = 0; i < N_LINES; i++) {
152 /* copy the line into the big buffer */
154 while (*lptr != '\0')
155 *(bptr++) = *(lptr++);
156 /* pad out the rest of the lines with blanks */
157 for (j = sizes[i]; j < max_size + 2; j++)
159 *(bptr++) = '\r'; /* add a \r in case of raw mode */
163 iovec.iov_base = big_buf;
164 iovec.iov_len = bptr - big_buf;
166 * we choose a timeout of RING_WAIT-5 seconds so that we don't
167 * stack up processes trying to write messages to a tty
168 * that is permanently blocked.
170 if (ttymsg(&iovec, 1, tty, RING_WAIT - 5) != NULL)