/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights * Reserved. This file contains Original Code and/or Modifications of * Original Code as defined in and that are subject to the Apple Public * Source License Version 1.0 (the 'License'). You may not use this file * except in compliance with the License. Please obtain a copy of the * License at http://www.apple.com/publicsource and read it before using * this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License." * * @APPLE_LICENSE_HEADER_END@ */ /* * 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 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "talkd.h" CTL_MSG request; CTL_RESPONSE response; int sockt; int debug = 0; void timeout(); long lastmsgtime; char hostname[MAXHOSTNAMELEN + 1]; #define TIMEOUT 30 #define MAXIDLE 120 void 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); if (gethostname(hostname, sizeof (hostname) - 1) < 0) { syslog(LOG_ERR, "gethostname: %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); }