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/*
* 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 (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright 1999,2001-2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <sys/systm.h>
#include <sys/tuneable.h>
#include <sys/errno.h>
#include <sys/proc.h>
#include <sys/time.h>
#include <sys/debug.h>
#include <sys/model.h>
#include <sys/policy.h>
int
adjtime(const struct timeval *delta, struct timeval *olddelta)
{
struct timeval atv, oatv;
int64_t ndelta;
int64_t old_delta;
int s;
model_t datamodel = get_udatamodel();
if (secpolicy_settime(CRED()) != 0)
return (set_errno(EPERM));
if (datamodel == DATAMODEL_NATIVE) {
if (copyin(delta, &atv, sizeof (atv)))
return (set_errno(EFAULT));
} else {
struct timeval32 atv32;
if (copyin(delta, &atv32, sizeof (atv32)))
return (set_errno(EFAULT));
TIMEVAL32_TO_TIMEVAL(&atv, &atv32);
}
if (atv.tv_usec <= -MICROSEC || atv.tv_usec >= MICROSEC)
return (set_errno(EINVAL));
/*
* The SVID specifies that if delta is 0, then there is
* no effect upon time correction, just return olddelta.
*/
ndelta = (int64_t)atv.tv_sec * NANOSEC + atv.tv_usec * 1000;
mutex_enter(&tod_lock);
s = hr_clock_lock();
old_delta = timedelta;
if (ndelta)
timedelta = ndelta;
/*
* Always set tod_needsync on all adjtime() calls, since it implies
* someone is watching over us and keeping the local clock in sync.
*/
tod_needsync = 1;
hr_clock_unlock(s);
mutex_exit(&tod_lock);
if (olddelta) {
oatv.tv_sec = old_delta / NANOSEC;
oatv.tv_usec = (old_delta % NANOSEC) / 1000;
if (datamodel == DATAMODEL_NATIVE) {
if (copyout(&oatv, olddelta, sizeof (oatv)))
return (set_errno(EFAULT));
} else {
struct timeval32 oatv32;
if (TIMEVAL_OVERFLOW(&oatv))
return (set_errno(EOVERFLOW));
TIMEVAL_TO_TIMEVAL32(&oatv32, &oatv);
if (copyout(&oatv32, olddelta, sizeof (oatv32)))
return (set_errno(EFAULT));
}
}
return (0);
}
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