in.daytimed.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* daytime inetd service - both stream and dgram based.
* Return human-readable time of day.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <stdio.h>
#include <strings.h>
#include <netinet/in.h>
#include <inetsvc.h>
#define TIMEBUF_SIZE 26
static const char *
daytime(void)
{
time_t clock;
static char buf[TIMEBUF_SIZE];
clock = time(NULL);
(void) strlcpy(buf, ctime(&clock), sizeof (buf));
/*
* Format of ctime is "Fri Sep 13 00:00:00 1986\n\0". To conform to the
* required format as specified in RFCs 867 and 854 we replace the
* "\n\0" with "\r\n".
*/
buf[TIMEBUF_SIZE - 2] = '\r';
buf[TIMEBUF_SIZE - 1] = '\n';
return (buf);
}
/* ARGSUSED3 */
static void
daytime_dg(int s, const struct sockaddr *sap, int sa_size, const void *buf,
size_t sz)
{
(void) safe_sendto(s, daytime(), TIMEBUF_SIZE, 0, sap, sa_size);
}
int
main(int argc, char *argv[])
{
opterr = 0; /* disable getopt error msgs */
switch (getopt(argc, argv, "ds")) {
case 'd':
dg_template(daytime_dg, STDIN_FILENO, NULL, 0);
break;
case 's':
(void) safe_write(STDIN_FILENO, daytime(), TIMEBUF_SIZE);
break;
default:
return (1);
}
return (0);
}