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- /*
- * Copyright (c) 1983, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char copyright[] =
- "@(#) Copyright (c) 1983, 1993\n\
- The Regents of the University of California. All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)talkd.c 8.1 (Berkeley) 6/4/93";
- #endif /* not lint */
-
- /*
- * The top level of the daemon, the format is heavily borrowed
- * from rwhod.c. Basically: find out who and where you are;
- * disconnect all descriptors and ttys, and then endless
- * loop on waiting for and processing requests
- */
-
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif
-
- #include <sys/types.h>
- #include <sys/socket.h>
- #ifndef HAVE_OSOCKADDR
- #include <osockaddr.h>
- #endif
- #include <protocols/talkd.h>
- #include <signal.h>
- #include <syslog.h>
- #include <time.h>
- #include <errno.h>
- #include <unistd.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <paths.h>
-
- extern char *localhost ();
-
- CTL_MSG request;
- CTL_RESPONSE response;
-
- int sockt;
- int debug = 0;
- void timeout();
- long lastmsgtime;
-
- char *hostname;
-
- #define TIMEOUT 30
- #define MAXIDLE 120
-
- main(argc, argv)
- int argc;
- char *argv[];
- {
- register CTL_MSG *mp = &request;
- int cc;
-
- if (getuid()) {
- fprintf(stderr, "%s: getuid: not super-user\n", argv[0]);
- exit(1);
- }
- openlog("talkd", LOG_PID, LOG_DAEMON);
- hostname = localhost ();
- if (! hostname) {
- syslog(LOG_ERR, "localhost: %m");
- _exit(1);
- }
- if (chdir(_PATH_DEV) < 0) {
- syslog(LOG_ERR, "chdir: %s: %m", _PATH_DEV);
- _exit(1);
- }
- if (argc > 1 && strcmp(argv[1], "-d") == 0)
- debug = 1;
- signal(SIGALRM, timeout);
- alarm(TIMEOUT);
- for (;;) {
- extern int errno;
-
- cc = recv(0, (char *)mp, sizeof (*mp), 0);
- if (cc != sizeof (*mp)) {
- if (cc < 0 && errno != EINTR)
- syslog(LOG_WARNING, "recv: %m");
- continue;
- }
- lastmsgtime = time(0);
- process_request(mp, &response);
- /* can block here, is this what I want? */
- cc = sendto(sockt, (char *)&response,
- sizeof (response), 0, (struct sockaddr *)&mp->ctl_addr,
- sizeof (mp->ctl_addr));
- if (cc != sizeof (response))
- syslog(LOG_WARNING, "sendto: %m");
- }
- }
-
- void
- timeout()
- {
-
- if (time(0) - lastmsgtime >= MAXIDLE)
- _exit(0);
- alarm(TIMEOUT);
- }
-