xref: /illumos-gate/usr/src/lib/libc/port/gen/settimeofday.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
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 /*	Copyright (c) 1988 AT&T	*/
30 /*	  All Rights Reserved  	*/
31 
32 
33 #pragma weak settimeofday = _settimeofday
34 
35 #include "synonyms.h"
36 #include <sys/types.h>
37 #include <sys/time.h>
38 #include <stdio.h>
39 #include <unistd.h>
40 #include <errno.h>
41 
42 /*
43  * Set the time.
44  * Don't do anything with the timezone information.
45  */
46 
47 /*ARGSUSED1*/
48 int
49 settimeofday(struct timeval *tp, void *tzp)
50 {
51 	time_t t;		/* time in seconds */
52 
53 	if (tp == NULL)
54 		return (0);
55 
56 	if (tp->tv_sec < 0 || tp->tv_usec < 0 ||
57 		tp->tv_usec >= MICROSEC) {
58 		errno = EINVAL;
59 		return (-1);
60 	}
61 
62 	t = (time_t)tp->tv_sec;
63 	if (tp->tv_usec >= (MICROSEC/2))
64 		/* round up */
65 		t++;
66 
67 	return (stime(&t));
68 }
69