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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 static const char copyright[] =
32 "@(#) Copyright (c) 1983, 1993\n\
33 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)talkd.c 8.1 (Berkeley) 6/4/93";
40 static const char rcsid[] =
45 * The top level of the daemon, the format is heavily borrowed
46 * from rwhod.c. Basically: find out who and where you are;
47 * disconnect all descriptors and ttys, and then endless
48 * loop on waiting for and processing requests
50 #include <sys/types.h>
51 #include <sys/socket.h>
52 #include <sys/param.h>
53 #include <netinet/in.h>
54 #include <protocols/talkd.h>
68 static CTL_MSG request;
69 static CTL_RESPONSE response;
72 static long lastmsgtime;
74 char hostname[MAXHOSTNAMELEN];
80 main(int argc, char *argv[])
82 register CTL_MSG *mp = &request;
84 struct sockaddr ctl_addr;
88 * removed so ntalkd can run in tty sandbox
91 errx(1, "getuid: not super-user");
93 openlog("talkd", LOG_PID, LOG_DAEMON);
94 if (gethostname(hostname, sizeof(hostname) - 1) < 0) {
95 syslog(LOG_ERR, "gethostname: %m");
98 hostname[sizeof(hostname) - 1] = '\0';
99 if (chdir(_PATH_DEV) < 0) {
100 syslog(LOG_ERR, "chdir: %s: %m", _PATH_DEV);
103 if (argc > 1 && strcmp(argv[1], "-d") == 0)
105 signal(SIGALRM, timeout);
108 cc = recv(0, (char *)mp, sizeof(*mp), 0);
109 if (cc != sizeof (*mp)) {
110 if (cc < 0 && errno != EINTR)
111 syslog(LOG_WARNING, "recv: %m");
114 lastmsgtime = time(0);
115 (void)memcpy(&ctl_addr, &mp->ctl_addr, sizeof(ctl_addr));
116 ctl_addr.sa_family = ntohs(mp->ctl_addr.sa_family);
117 ctl_addr.sa_len = sizeof(ctl_addr);
118 process_request(mp, &response);
119 /* can block here, is this what I want? */
120 cc = sendto(STDIN_FILENO, (char *)&response,
121 sizeof(response), 0, &ctl_addr, sizeof(ctl_addr));
122 if (cc != sizeof (response))
123 syslog(LOG_WARNING, "sendto: %m");
128 timeout(int sig __unused)
130 int save_errno = errno;
132 if (time(0) - lastmsgtime >= MAXIDLE)