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 #pragma ident "%Z%%M% %I% %E% SMI" /* from SVr4.0 1.78 */ 32 33 #include <sys/param.h> 34 #include <sys/types.h> 35 #include <sys/sysmacros.h> 36 #include <sys/systm.h> 37 #include <sys/tuneable.h> 38 #include <sys/errno.h> 39 #include <sys/proc.h> 40 #include <sys/time.h> 41 #include <sys/debug.h> 42 #include <sys/model.h> 43 #include <sys/policy.h> 44 45 int 46 adjtime(struct timeval *delta, struct timeval *olddelta) 47 { 48 struct timeval atv, oatv; 49 int64_t ndelta; 50 int64_t old_delta; 51 int s; 52 model_t datamodel = get_udatamodel(); 53 54 if (secpolicy_settime(CRED()) != 0) 55 return (set_errno(EPERM)); 56 57 if (datamodel == DATAMODEL_NATIVE) { 58 if (copyin(delta, &atv, sizeof (atv))) 59 return (set_errno(EFAULT)); 60 } else { 61 struct timeval32 atv32; 62 63 if (copyin(delta, &atv32, sizeof (atv32))) 64 return (set_errno(EFAULT)); 65 TIMEVAL32_TO_TIMEVAL(&atv, &atv32); 66 } 67 68 if (atv.tv_usec <= -MICROSEC || atv.tv_usec >= MICROSEC) 69 return (set_errno(EINVAL)); 70 71 /* 72 * The SVID specifies that if delta is 0, then there is 73 * no effect upon time correction, just return olddelta. 74 */ 75 ndelta = (int64_t)atv.tv_sec * NANOSEC + atv.tv_usec * 1000; 76 mutex_enter(&tod_lock); 77 s = hr_clock_lock(); 78 old_delta = timedelta; 79 if (ndelta) 80 timedelta = ndelta; 81 /* 82 * Always set tod_needsync on all adjtime() calls, since it implies 83 * someone is watching over us and keeping the local clock in sync. 84 */ 85 tod_needsync = 1; 86 hr_clock_unlock(s); 87 mutex_exit(&tod_lock); 88 89 if (olddelta) { 90 oatv.tv_sec = old_delta / NANOSEC; 91 oatv.tv_usec = (old_delta % NANOSEC) / 1000; 92 if (datamodel == DATAMODEL_NATIVE) { 93 if (copyout(&oatv, olddelta, sizeof (oatv))) 94 return (set_errno(EFAULT)); 95 } else { 96 struct timeval32 oatv32; 97 98 if (TIMEVAL_OVERFLOW(&oatv)) 99 return (set_errno(EOVERFLOW)); 100 101 TIMEVAL_TO_TIMEVAL32(&oatv32, &oatv); 102 103 if (copyout(&oatv32, olddelta, sizeof (oatv32))) 104 return (set_errno(EFAULT)); 105 } 106 } 107 return (0); 108 } 109