2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 static const char copyright[] =
34 "@(#) Copyright (c) 1983, 1993\n\
35 The Regents of the University of California. All rights reserved.\n";
40 static char sccsid[] = "@(#)talkd.c 8.1 (Berkeley) 6/4/93";
42 static const char rcsid[] =
47 * The top level of the daemon, the format is heavily borrowed
48 * from rwhod.c. Basically: find out who and where you are;
49 * disconnect all descriptors and ttys, and then endless
50 * loop on waiting for and processing requests
52 #include <sys/types.h>
53 #include <sys/socket.h>
54 #include <sys/param.h>
55 #include <netinet/in.h>
56 #include <protocols/talkd.h>
70 static CTL_MSG request;
71 static CTL_RESPONSE response;
74 static long lastmsgtime;
76 char hostname[MAXHOSTNAMELEN];
82 main(int argc, char *argv[])
84 register CTL_MSG *mp = &request;
86 struct sockaddr ctl_addr;
90 * removed so ntalkd can run in tty sandbox
93 errx(1, "getuid: not super-user");
95 openlog("talkd", LOG_PID, LOG_DAEMON);
96 if (gethostname(hostname, sizeof(hostname) - 1) < 0) {
97 syslog(LOG_ERR, "gethostname: %m");
100 hostname[sizeof(hostname) - 1] = '\0';
101 if (chdir(_PATH_DEV) < 0) {
102 syslog(LOG_ERR, "chdir: %s: %m", _PATH_DEV);
105 if (argc > 1 && strcmp(argv[1], "-d") == 0)
107 signal(SIGALRM, timeout);
110 cc = recv(0, (char *)mp, sizeof(*mp), 0);
111 if (cc != sizeof (*mp)) {
112 if (cc < 0 && errno != EINTR)
113 syslog(LOG_WARNING, "recv: %m");
116 lastmsgtime = time(0);
117 (void)memcpy(&ctl_addr, &mp->ctl_addr, sizeof(ctl_addr));
118 ctl_addr.sa_family = ntohs(mp->ctl_addr.sa_family);
119 ctl_addr.sa_len = sizeof(ctl_addr);
120 process_request(mp, &response);
121 /* can block here, is this what I want? */
122 cc = sendto(STDIN_FILENO, (char *)&response,
123 sizeof(response), 0, &ctl_addr, sizeof(ctl_addr));
124 if (cc != sizeof (response))
125 syslog(LOG_WARNING, "sendto: %m");
130 timeout(int sig __unused)
132 int save_errno = errno;
134 if (time(0) - lastmsgtime >= MAXIDLE)