Return to talkd.c CVS log

Up to [CSRG BSD Unix] / 43BSDTahoe / etc / talkd

Annotation of 43BSDTahoe/etc/talkd/talkd.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that the above copyright notice and this paragraph are
                      7:  * duplicated in all such forms and that any documentation,
                      8:  * advertising materials, and other materials related to such
                      9:  * distribution and use acknowledge that the software was developed
                     10:  * by the University of California, Berkeley.  The name of the
                     11:  * University may not be used to endorse or promote products derived
                     12:  * from this software without specific prior written permission.
                     13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     16:  */
                     17: 
                     18: #ifndef lint
                     19: char copyright[] =
                     20: "@(#) Copyright (c) 1983 Regents of the University of California.\n\
                     21:  All rights reserved.\n";
                     22: #endif /* not lint */
                     23: 
                     24: #ifndef lint
                     25: static char sccsid[] = "@(#)talkd.c    5.4 (Berkeley) 6/18/88";
                     26: #endif /* not lint */
                     27: 
                     28: /*
                     29:  * The top level of the daemon, the format is heavily borrowed
                     30:  * from rwhod.c. Basically: find out who and where you are; 
                     31:  * disconnect all descriptors and ttys, and then endless
                     32:  * loop on waiting for and processing requests
                     33:  */
                     34: #include <stdio.h>
                     35: #include <errno.h>
                     36: #include <signal.h>
                     37: #include <syslog.h>
                     38: 
                     39: #include <protocols/talkd.h>
                     40: 
                     41: CTL_MSG                request;
                     42: CTL_RESPONSE   response;
                     43: 
                     44: int    sockt;
                     45: int    debug = 0;
                     46: int    timeout();
                     47: long   lastmsgtime;
                     48: 
                     49: char   hostname[32];
                     50: 
                     51: #define TIMEOUT 30
                     52: #define MAXIDLE 120
                     53: 
                     54: main(argc, argv)
                     55:        int argc;
                     56:        char *argv[];
                     57: {
                     58:        register CTL_MSG *mp = &request;
                     59:        int cc;
                     60: 
                     61:        if (getuid()) {
                     62:                fprintf(stderr, "%s: getuid: not super-user", argv[0]);
                     63:                exit(1);
                     64:        }
                     65:        openlog("talkd", LOG_PID, LOG_DAEMON);
                     66:        if (gethostname(hostname, sizeof (hostname) - 1) < 0) {
                     67:                syslog(LOG_ERR, "gethostname: %m");
                     68:                _exit(1);
                     69:        }
                     70:        if (chdir("/dev") < 0) {
                     71:                syslog(LOG_ERR, "chdir: /dev: %m");
                     72:                _exit(1);
                     73:        }
                     74:        if (argc > 1 && strcmp(argv[1], "-d") == 0)
                     75:                debug = 1;
                     76:        signal(SIGALRM, timeout);
                     77:        alarm(TIMEOUT);
                     78:        for (;;) {
                     79:                extern int errno;
                     80: 
                     81:                cc = recv(0, (char *)mp, sizeof (*mp), 0);
                     82:                if (cc != sizeof (*mp)) {
                     83:                        if (cc < 0 && errno != EINTR)
                     84:                                syslog(LOG_WARNING, "recv: %m");
                     85:                        continue;
                     86:                }
                     87:                lastmsgtime = time(0);
                     88:                process_request(mp, &response);
                     89:                /* can block here, is this what I want? */
                     90:                cc = sendto(sockt, (char *)&response,
                     91:                    sizeof (response), 0, &mp->ctl_addr, sizeof (mp->ctl_addr));
                     92:                if (cc != sizeof (response))
                     93:                        syslog(LOG_WARNING, "sendto: %m");
                     94:        }
                     95: }
                     96: 
                     97: timeout()
                     98: {
                     99: 
                    100:        if (time(0) - lastmsgtime >= MAXIDLE)
                    101:                _exit(0);
                    102:        alarm(TIMEOUT);
                    103: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.