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 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