1 /* $NetBSD: linux_time.c,v 1.9 2005/02/26 23:10:19 perry 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 1.9 2005/02/26 23:10:19 perry 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__ */
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