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 * daytime inetd service - both stream and dgram based.
31 * Return human-readable time of day.
32 */
33
34#include <sys/types.h>
35#include <sys/socket.h>
36#include <unistd.h>
37#include <stdio.h>
38#include <strings.h>
39#include <netinet/in.h>
40#include <inetsvc.h>
41
42
43#define	TIMEBUF_SIZE	26
44
45
46static const char *
47daytime(void)
48{
49	time_t		clock;
50	static char	buf[TIMEBUF_SIZE];
51
52	clock = time(NULL);
53	(void) strlcpy(buf, ctime(&clock), sizeof (buf));
54	/*
55	 * Format of ctime is "Fri Sep 13 00:00:00 1986\n\0". To conform to the
56	 * required format as specified in RFCs 867 and 854 we replace the
57	 * "\n\0" with "\r\n".
58	 */
59	buf[TIMEBUF_SIZE - 2] = '\r';
60	buf[TIMEBUF_SIZE - 1] = '\n';
61
62	return (buf);
63}
64
65/* ARGSUSED3 */
66static void
67daytime_dg(int s, const struct sockaddr *sap, int sa_size, const void *buf,
68    size_t sz)
69{
70	(void) safe_sendto(s, daytime(), TIMEBUF_SIZE, 0, sap, sa_size);
71}
72
73int
74main(int argc, char *argv[])
75{
76	opterr = 0;	/* disable getopt error msgs */
77	switch (getopt(argc, argv, "ds")) {
78	case 'd':
79		dg_template(daytime_dg, STDIN_FILENO, NULL, 0);
80		break;
81	case 's':
82		(void) safe_write(STDIN_FILENO, daytime(), TIMEBUF_SIZE);
83		break;
84	default:
85		return (1);
86	}
87
88	return (0);
89}
90