xref: /illumos-gate/usr/src/lib/libc/port/gen/settimeofday.c (revision 4a38094c1dd4980a3761849bfbdf92ae62c568f5)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1988 AT&T	*/
/*	  All Rights Reserved	*/

#include "lint.h"
#include <sys/types.h>
#include <sys/time.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>

/*
 * Set the time.
 * Don't do anything with the timezone information.
 */

int
settimeofday(struct timeval *tp, void *tzp __unused)
{
	time_t t;		/* time in seconds */

	if (tp == NULL)
		return (0);

	if (tp->tv_sec < 0 || tp->tv_usec < 0 || tp->tv_usec >= MICROSEC) {
		errno = EINVAL;
		return (-1);
	}

	t = (time_t)tp->tv_sec;
	if (tp->tv_usec >= (MICROSEC/2))
		/* round up */
		t++;

	return (stime(&t));
}