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
machtime(void)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
machtime_stream(int s)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
machtime_dg(int s,const struct sockaddr * sap,int sa_len,const void * buf,size_t sz)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
main(int argc,char * argv[])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 }
97