1 /* $NetBSD: linux_time.c,v 1.8 2003/01/18 21:21:39 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Emmanuel Dreyfus. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: linux_time.c,v 1.8 2003/01/18 21:21:39 thorpej Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/ucred.h> 44 #include <sys/mount.h> 45 #include <sys/signal.h> 46 #include <sys/stdint.h> 47 #include <sys/time.h> 48 #include <sys/systm.h> 49 #include <sys/sa.h> 50 #include <sys/syscallargs.h> 51 52 #include <compat/linux/common/linux_types.h> 53 #include <compat/linux/common/linux_signal.h> 54 55 #include <compat/linux/linux_syscallargs.h> 56 57 /* 58 * This is not implemented for alpha yet 59 */ 60 #if defined (__i386__) || defined (__m68k__) || \ 61 defined (__powerpc__) || defined (__mips__) || defined(__arm__) 62 63 /* 64 * Linux keeps track of a system timezone in the kernel. It is readen 65 * by gettimeofday and set by settimeofday. This emulates this behavior 66 * See linux/kernel/time.c 67 */ 68 struct timezone linux_sys_tz; 69 70 int linux_sys_gettimeofday(l, v, retval) 71 struct lwp *l; 72 void *v; 73 register_t *retval; 74 { 75 struct linux_sys_gettimeofday_args /* { 76 syscallarg(struct timeval *) tz; 77 syscallarg(struct timezone *) tzp; 78 } */ *uap = v; 79 int error = 0; 80 81 if (SCARG(uap, tp)) { 82 error = sys_gettimeofday (l, v, retval); 83 if (error) 84 return (error); 85 } 86 87 if (SCARG(uap, tzp)) { 88 error = copyout(&linux_sys_tz, SCARG(uap, tzp), sizeof(linux_sys_tz)); 89 if (error) 90 return (error); 91 } 92 93 return (0); 94 } 95 96 int linux_sys_settimeofday(l, v, retval) 97 struct lwp *l; 98 void *v; 99 register_t *retval; 100 { 101 struct linux_sys_settimeofday_args /* { 102 syscallarg(struct timeval *) tz; 103 syscallarg(struct timezone *) tzp; 104 } */ *uap = v; 105 int error = 0; 106 107 if (SCARG(uap, tp)) { 108 error = sys_settimeofday(l, v, retval); 109 if (error) 110 return (error); 111 } 112 113 /* 114 * If user is not the superuser, we returned 115 * after the sys_settimeofday() call. 116 */ 117 if (SCARG(uap, tzp)) { 118 error = copyin(SCARG(uap, tzp), &linux_sys_tz, sizeof(linux_sys_tz)); 119 if (error) 120 return (error); 121 } 122 123 return (0); 124 } 125 126 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 127