kernel/syscall/time.c

   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 1994-2003 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  28 /*      All rights reserved.    */
  29
  30
  31 #pragma ident   "%Z%%M% %I%     %E% SMI"
  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/policy.h>
  43
  44 time_t
  45 gtime(void)
  46 {
  47         return (gethrestime_sec());
  48 }
  49
  50 int
  51 stime(time_t time)
  52 {
  53         timestruc_t ts;
  54
  55         if (secpolicy_settime(CRED()) != 0)
  56                 return (set_errno(EPERM));
  57
  58         if (time < 0)
  59                 return (set_errno(EINVAL));
  60
  61         ts.tv_sec = time;
  62         ts.tv_nsec = 0;
  63         mutex_enter(&tod_lock);
  64         tod_set(ts);
  65         set_hrestime(&ts);
  66         mutex_exit(&tod_lock);
  67
  68         return (0);
  69 }
  70
  71 #if defined(_SYSCALL32_IMPL)
  72 int
  73 stime32(time32_t time)
  74 {
  75         if (time < 0)
  76                 return (set_errno(EINVAL));
  77
  78         return (stime((time_t)time));
  79 }
  80 #endif