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 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
23 /* All Rights Reserved */
24
25
26 /*
27 * Copyright 1999,2001-2003 Sun Microsystems, Inc. All rights reserved.
28 * Use is subject to license terms.
29 */
30
31 #include <sys/param.h>
32 #include <sys/types.h>
33 #include <sys/sysmacros.h>
34 #include <sys/systm.h>
35 #include <sys/tuneable.h>
36 #include <sys/errno.h>
37 #include <sys/proc.h>
38 #include <sys/time.h>
39 #include <sys/debug.h>
40 #include <sys/model.h>
41 #include <sys/policy.h>
42
43 int
adjtime(const struct timeval * delta,struct timeval * olddelta)44 adjtime(const struct timeval *delta, struct timeval *olddelta)
45 {
46 struct timeval atv, oatv;
47 int64_t ndelta;
48 int64_t old_delta;
49 int s;
50 model_t datamodel = get_udatamodel();
51
52 if (secpolicy_settime(CRED()) != 0)
53 return (set_errno(EPERM));
54
55 if (datamodel == DATAMODEL_NATIVE) {
56 if (copyin(delta, &atv, sizeof (atv)))
57 return (set_errno(EFAULT));
58 } else {
59 struct timeval32 atv32;
60
61 if (copyin(delta, &atv32, sizeof (atv32)))
62 return (set_errno(EFAULT));
63 TIMEVAL32_TO_TIMEVAL(&atv, &atv32);
64 }
65
66 if (atv.tv_usec <= -MICROSEC || atv.tv_usec >= MICROSEC)
67 return (set_errno(EINVAL));
68
69 /*
70 * The SVID specifies that if delta is 0, then there is
71 * no effect upon time correction, just return olddelta.
72 */
73 ndelta = (int64_t)atv.tv_sec * NANOSEC + atv.tv_usec * 1000;
74 mutex_enter(&tod_lock);
75 s = hr_clock_lock();
76 old_delta = timedelta;
77 if (ndelta)
78 timedelta = ndelta;
79 /*
80 * Always set tod_needsync on all adjtime() calls, since it implies
81 * someone is watching over us and keeping the local clock in sync.
82 */
83 tod_needsync = 1;
84 hr_clock_unlock(s);
85 mutex_exit(&tod_lock);
86
87 if (olddelta) {
88 oatv.tv_sec = old_delta / NANOSEC;
89 oatv.tv_usec = (old_delta % NANOSEC) / 1000;
90 if (datamodel == DATAMODEL_NATIVE) {
91 if (copyout(&oatv, olddelta, sizeof (oatv)))
92 return (set_errno(EFAULT));
93 } else {
94 struct timeval32 oatv32;
95
96 if (TIMEVAL_OVERFLOW(&oatv))
97 return (set_errno(EOVERFLOW));
98
99 TIMEVAL_TO_TIMEVAL32(&oatv32, &oatv);
100
101 if (copyout(&oatv32, olddelta, sizeof (oatv32)))
102 return (set_errno(EFAULT));
103 }
104 }
105 return (0);
106 }
107