usr/src/cmd/cmd-inet/usr.lib/in.timed/in.timed.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 /*
  30  * time inetd service - both stream and dgram based.
  31  */
  32
  33 #include <sys/types.h>
  34 #include <sys/socket.h>
  35 #include <unistd.h>
  36 #include <stdio.h>
  37 #include <netinet/in.h>
  38 #include <sys/time.h>
  39 #include <syslog.h>
  40 #include <inetsvc.h>
  41
  42
  43 /*
  44  * Return a machine readable date and time, in the form of the
  45  * number of seconds since midnight, Jan 1, 1900.  Since gettimeofday
  46  * returns the number of seconds since midnight, Jan 1, 1970,
  47  * we must add 2208988800 seconds to this figure to make up for
  48  * some seventy years Bell Labs was asleep.
  49  */
  50 static uint32_t
  51 machtime(void)
  52 {
  53         struct timeval tv;
  54
  55         if (gettimeofday(&tv, NULL) < 0) {
  56                 syslog(LOG_INFO, "Unable to get time of day");
  57                 return (0);
  58         }
  59         return ((uint32_t)htonl(tv.tv_sec + 2208988800U));
  60 }
  61
  62 static void
  63 machtime_stream(int s)
  64 {
  65         uint32_t result = machtime();
  66
  67         (void) safe_write(s, &result, sizeof (result));
  68 }
  69
  70 /* ARGSUSED3 */
  71 static void
  72 machtime_dg(int s, const struct sockaddr *sap, int sa_len, const void *buf,
  73     size_t sz)
  74 {
  75         uint32_t result = machtime();
  76
  77         (void) safe_sendto(s, &result, sizeof (result), 0, sap, sa_len);
  78 }
  79
  80 int
  81 main(int argc, char *argv[])
  82 {
  83         opterr = 0;     /* disable getopt error msgs */
  84         switch (getopt(argc, argv, "ds")) {
  85         case 'd':
  86                 dg_template(machtime_dg, STDIN_FILENO, NULL, 0);
  87                 break;
  88         case 's':
  89                 machtime_stream(STDIN_FILENO);
  90                 break;
  91         default:
  92                 return (1);
  93         }
  94
  95         return (0);
  96 }