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abbde1b0 | 1 | /* Convert between the kernel's `struct stat' format, and libc's. |
d614a753 | 2 | Copyright (C) 1991-2020 Free Software Foundation, Inc. |
abbde1b0 UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
3214b89b AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
abbde1b0 UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
3214b89b | 13 | Lesser General Public License for more details. |
abbde1b0 | 14 | |
3214b89b | 15 | You should have received a copy of the GNU Lesser General Public |
ab84e3ff | 16 | License along with the GNU C Library. If not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
abbde1b0 | 18 | |
b8ba6f06 AJ |
19 | #include <errno.h> |
20 | #include <sys/stat.h> | |
21 | #include <kernel_stat.h> | |
22 | ||
abbde1b0 UD |
23 | #include <string.h> |
24 | ||
b8ba6f06 AJ |
25 | int |
26 | __xstat_conv (int vers, struct kernel_stat *kbuf, void *ubuf) | |
abbde1b0 UD |
27 | { |
28 | switch (vers) | |
29 | { | |
30 | case _STAT_VER_KERNEL: | |
31 | /* Nothing to do. The struct is in the form the kernel expects. | |
32 | We should have short-circuted before we got here, but for | |
33 | completeness... */ | |
34 | *(struct kernel_stat *) ubuf = *kbuf; | |
35 | break; | |
36 | ||
37 | case _STAT_VER_LINUX: | |
38 | { | |
39 | struct stat *buf = ubuf; | |
40 | ||
41 | /* Convert to current kernel version of `struct stat'. */ | |
42 | buf->st_dev = kbuf->st_dev; | |
6ea63025 | 43 | memset (&buf->st_pad1, 0, sizeof (buf->st_pad1)); |
abbde1b0 | 44 | buf->st_ino = kbuf->st_ino; |
6ea63025 DJ |
45 | /* Check for overflow. */ |
46 | if (buf->st_ino != kbuf->st_ino) | |
47 | { | |
48 | __set_errno (EOVERFLOW); | |
49 | return -1; | |
50 | } | |
abbde1b0 UD |
51 | buf->st_mode = kbuf->st_mode; |
52 | buf->st_nlink = kbuf->st_nlink; | |
53 | buf->st_uid = kbuf->st_uid; | |
54 | buf->st_gid = kbuf->st_gid; | |
55 | buf->st_rdev = kbuf->st_rdev; | |
6ea63025 | 56 | memset (&buf->st_pad2, 0, sizeof (buf->st_pad2)); |
abbde1b0 | 57 | buf->st_size = kbuf->st_size; |
6ea63025 DJ |
58 | /* Check for overflow. */ |
59 | if (buf->st_size != kbuf->st_size) | |
60 | { | |
61 | __set_errno (EOVERFLOW); | |
62 | return -1; | |
63 | } | |
64 | buf->st_pad3 = 0; | |
d7f9cd89 DJ |
65 | buf->st_atim.tv_sec = kbuf->st_atime_sec; |
66 | buf->st_atim.tv_nsec = kbuf->st_atime_nsec; | |
67 | buf->st_mtim.tv_sec = kbuf->st_mtime_sec; | |
68 | buf->st_mtim.tv_nsec = kbuf->st_mtime_nsec; | |
69 | buf->st_ctim.tv_sec = kbuf->st_ctime_sec; | |
70 | buf->st_ctim.tv_nsec = kbuf->st_ctime_nsec; | |
6ea63025 DJ |
71 | buf->st_blksize = kbuf->st_blksize; |
72 | buf->st_blocks = kbuf->st_blocks; | |
73 | /* Check for overflow. */ | |
74 | if (buf->st_blocks != kbuf->st_blocks) | |
75 | { | |
76 | __set_errno (EOVERFLOW); | |
77 | return -1; | |
78 | } | |
79 | memset (&buf->st_pad5, 0, sizeof (buf->st_pad5)); | |
abbde1b0 UD |
80 | } |
81 | break; | |
82 | ||
83 | default: | |
84 | __set_errno (EINVAL); | |
85 | return -1; | |
86 | } | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
b8ba6f06 AJ |
91 | int |
92 | __xstat64_conv (int vers, struct kernel_stat *kbuf, void *ubuf) | |
abbde1b0 | 93 | { |
d2e1e973 | 94 | #if XSTAT_IS_XSTAT64 |
abbde1b0 UD |
95 | return xstat_conv (vers, kbuf, ubuf); |
96 | #else | |
97 | switch (vers) | |
98 | { | |
99 | case _STAT_VER_LINUX: | |
100 | { | |
101 | struct stat64 *buf = ubuf; | |
102 | ||
103 | buf->st_dev = kbuf->st_dev; | |
6ea63025 | 104 | memset (&buf->st_pad1, 0, sizeof (buf->st_pad1)); |
abbde1b0 UD |
105 | buf->st_ino = kbuf->st_ino; |
106 | buf->st_mode = kbuf->st_mode; | |
107 | buf->st_nlink = kbuf->st_nlink; | |
108 | buf->st_uid = kbuf->st_uid; | |
109 | buf->st_gid = kbuf->st_gid; | |
110 | buf->st_rdev = kbuf->st_rdev; | |
6ea63025 | 111 | memset (&buf->st_pad2, 0, sizeof (buf->st_pad2)); |
abbde1b0 UD |
112 | buf->st_pad3 = 0; |
113 | buf->st_size = kbuf->st_size; | |
114 | buf->st_blksize = kbuf->st_blksize; | |
115 | buf->st_blocks = kbuf->st_blocks; | |
116 | ||
d7f9cd89 DJ |
117 | buf->st_atim.tv_sec = kbuf->st_atime_sec; |
118 | buf->st_atim.tv_nsec = kbuf->st_atime_nsec; | |
119 | buf->st_mtim.tv_sec = kbuf->st_mtime_sec; | |
120 | buf->st_mtim.tv_nsec = kbuf->st_mtime_nsec; | |
121 | buf->st_ctim.tv_sec = kbuf->st_ctime_sec; | |
122 | buf->st_ctim.tv_nsec = kbuf->st_ctime_nsec; | |
abbde1b0 | 123 | |
6ea63025 | 124 | memset (&buf->st_pad4, 0, sizeof (buf->st_pad4)); |
abbde1b0 UD |
125 | } |
126 | break; | |
127 | ||
128 | /* If struct stat64 is different from struct stat then | |
129 | _STAT_VER_KERNEL does not make sense. */ | |
130 | case _STAT_VER_KERNEL: | |
131 | default: | |
132 | __set_errno (EINVAL); | |
133 | return -1; | |
134 | } | |
135 | ||
136 | return 0; | |
137 | #endif | |
138 | } | |
b8ba6f06 | 139 | |
6ea63025 DJ |
140 | #if _MIPS_SIM == _ABIO32 |
141 | int | |
142 | __xstat32_conv (int vers, struct stat64 *kbuf, struct stat *buf) | |
143 | { | |
144 | switch (vers) | |
145 | { | |
146 | case _STAT_VER_LINUX: | |
147 | /* Convert current kernel version of `struct stat64' to | |
148 | `struct stat'. The layout of the fields in the kernel's | |
149 | stat64 is the same as that in the user stat64; the only | |
150 | difference is that the latter has more trailing padding. */ | |
151 | buf->st_dev = kbuf->st_dev; | |
152 | memset (&buf->st_pad1, 0, sizeof (buf->st_pad1)); | |
153 | buf->st_ino = kbuf->st_ino; | |
154 | /* Check for overflow. */ | |
155 | if (buf->st_ino != kbuf->st_ino) | |
156 | { | |
157 | __set_errno (EOVERFLOW); | |
158 | return -1; | |
159 | } | |
160 | buf->st_mode = kbuf->st_mode; | |
161 | buf->st_nlink = kbuf->st_nlink; | |
162 | buf->st_uid = kbuf->st_uid; | |
163 | buf->st_gid = kbuf->st_gid; | |
164 | buf->st_rdev = kbuf->st_rdev; | |
165 | memset (&buf->st_pad2, 0, sizeof (buf->st_pad2)); | |
166 | buf->st_size = kbuf->st_size; | |
167 | /* Check for overflow. */ | |
168 | if (buf->st_size != kbuf->st_size) | |
169 | { | |
170 | __set_errno (EOVERFLOW); | |
171 | return -1; | |
172 | } | |
173 | buf->st_pad3 = 0; | |
174 | buf->st_atim.tv_sec = kbuf->st_atim.tv_sec; | |
175 | buf->st_atim.tv_nsec = kbuf->st_atim.tv_nsec; | |
176 | buf->st_mtim.tv_sec = kbuf->st_mtim.tv_sec; | |
177 | buf->st_mtim.tv_nsec = kbuf->st_mtim.tv_nsec; | |
178 | buf->st_ctim.tv_sec = kbuf->st_ctim.tv_sec; | |
179 | buf->st_ctim.tv_nsec = kbuf->st_ctim.tv_nsec; | |
180 | buf->st_blksize = kbuf->st_blksize; | |
181 | buf->st_blocks = kbuf->st_blocks; | |
182 | /* Check for overflow. */ | |
183 | if (buf->st_blocks != kbuf->st_blocks) | |
184 | { | |
185 | __set_errno (EOVERFLOW); | |
186 | return -1; | |
187 | } | |
188 | memset (&buf->st_pad5, 0, sizeof (buf->st_pad5)); | |
189 | break; | |
190 | ||
191 | /* If struct stat64 is different from struct stat then | |
192 | _STAT_VER_KERNEL does not make sense. */ | |
193 | case _STAT_VER_KERNEL: | |
194 | default: | |
195 | __set_errno (EINVAL); | |
196 | return -1; | |
197 | } | |
198 | ||
199 | return 0; | |
200 | } | |
201 | #endif /* _MIPS_SIM == _ABIO32 */ |