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ce4d8b66 | 1 | /* Functions to read locale data files. |
3e154a6f | 2 | Copyright (C) 1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc. |
c84142e8 | 3 | This file is part of the GNU C Library. |
4b10dd6c | 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. |
933e73fa | 5 | |
c84142e8 | 6 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
933e73fa | 10 | |
c84142e8 UD |
11 | The GNU C Library is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
933e73fa | 15 | |
41bdb6e2 AJ |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
19 | 02111-1307 USA. */ | |
933e73fa | 20 | |
e43e0dd6 | 21 | #include <assert.h> |
933e73fa RM |
22 | #include <errno.h> |
23 | #include <fcntl.h> | |
3e154a6f | 24 | #include <locale.h> |
933e73fa RM |
25 | #include <stdlib.h> |
26 | #include <string.h> | |
7a12c6bb | 27 | #include <unistd.h> |
b6aa34eb UD |
28 | #ifdef _POSIX_MAPPED_FILES |
29 | # include <sys/mman.h> | |
30 | #endif | |
7a12c6bb RM |
31 | #include <sys/stat.h> |
32 | ||
933e73fa RM |
33 | #include "localeinfo.h" |
34 | ||
7a12c6bb RM |
35 | |
36 | static const size_t _nl_category_num_items[] = | |
19bc17a9 | 37 | { |
4b10dd6c | 38 | #define DEFINE_CATEGORY(category, category_name, items, a) \ |
19bc17a9 | 39 | [category] = _NL_ITEM_INDEX (_NL_NUM_##category), |
933e73fa RM |
40 | #include "categories.def" |
41 | #undef DEFINE_CATEGORY | |
19bc17a9 RM |
42 | }; |
43 | ||
44 | ||
45 | #define NO_PAREN(arg, rest...) arg, ##rest | |
46 | ||
4b10dd6c | 47 | #define DEFINE_CATEGORY(category, category_name, items, a) \ |
19bc17a9 RM |
48 | static const enum value_type _nl_value_type_##category[] = { NO_PAREN items }; |
49 | #define DEFINE_ELEMENT(element, element_name, optstd, type, rest...) \ | |
50 | [_NL_ITEM_INDEX (element)] = type, | |
51 | #include "categories.def" | |
52 | #undef DEFINE_CATEGORY | |
53 | ||
54 | static const enum value_type *_nl_value_types[] = | |
55 | { | |
4b10dd6c | 56 | #define DEFINE_CATEGORY(category, category_name, items, a) \ |
19bc17a9 RM |
57 | [category] = _nl_value_type_##category, |
58 | #include "categories.def" | |
59 | #undef DEFINE_CATEGORY | |
60 | }; | |
61 | ||
933e73fa | 62 | |
7a12c6bb RM |
63 | void |
64 | _nl_load_locale (struct loaded_l10nfile *file, int category) | |
933e73fa | 65 | { |
933e73fa RM |
66 | int fd; |
67 | struct | |
68 | { | |
69 | unsigned int magic; | |
70 | unsigned int nstrings; | |
71 | unsigned int strindex[0]; | |
72 | } *filedata; | |
8edf6e0d | 73 | struct stat64 st; |
933e73fa | 74 | struct locale_data *newdata; |
7a12c6bb | 75 | int save_err; |
c84142e8 | 76 | int mmaped = 1; |
7a12c6bb | 77 | size_t cnt; |
933e73fa | 78 | |
7a12c6bb RM |
79 | file->decided = 1; |
80 | file->data = NULL; | |
81 | ||
82 | fd = __open (file->filename, O_RDONLY); | |
3a31f6f4 | 83 | if (__builtin_expect (fd, 0) < 0) |
7a12c6bb RM |
84 | /* Cannot open the file. */ |
85 | return; | |
86 | ||
8edf6e0d | 87 | if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0) |
7a12c6bb | 88 | goto puntfd; |
3a31f6f4 | 89 | if (__builtin_expect (S_ISDIR (st.st_mode), 0)) |
933e73fa | 90 | { |
7a12c6bb RM |
91 | /* LOCALE/LC_foo is a directory; open LOCALE/LC_foo/SYS_LC_foo |
92 | instead. */ | |
93 | char *newp; | |
b6aa34eb | 94 | size_t filenamelen; |
036cc82f | 95 | |
7a12c6bb RM |
96 | __close (fd); |
97 | ||
b6aa34eb UD |
98 | filenamelen = strlen (file->filename); |
99 | newp = (char *) alloca (filenamelen | |
7a12c6bb | 100 | + 5 + _nl_category_name_sizes[category] + 1); |
b6aa34eb UD |
101 | __mempcpy (__mempcpy (__mempcpy (newp, file->filename, filenamelen), |
102 | "/SYS_", 5), | |
103 | _nl_category_names[category], | |
104 | _nl_category_name_sizes[category] + 1); | |
7a12c6bb RM |
105 | |
106 | fd = __open (newp, O_RDONLY); | |
3a31f6f4 | 107 | if (__builtin_expect (fd, 0) < 0) |
7a12c6bb RM |
108 | return; |
109 | ||
8edf6e0d | 110 | if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0) |
7a12c6bb | 111 | goto puntfd; |
933e73fa RM |
112 | } |
113 | ||
7a12c6bb RM |
114 | /* Map in the file's data. */ |
115 | save_err = errno; | |
b6aa34eb UD |
116 | #ifdef _POSIX_MAPPED_FILES |
117 | # ifndef MAP_COPY | |
7a12c6bb | 118 | /* Linux seems to lack read-only copy-on-write. */ |
b6aa34eb UD |
119 | # define MAP_COPY MAP_PRIVATE |
120 | # endif | |
121 | # ifndef MAP_FILE | |
7a12c6bb | 122 | /* Some systems do not have this flag; it is superfluous. */ |
b6aa34eb UD |
123 | # define MAP_FILE 0 |
124 | # endif | |
125 | # ifndef MAP_INHERIT | |
7a12c6bb | 126 | /* Some systems might lack this; they lose. */ |
b6aa34eb UD |
127 | # define MAP_INHERIT 0 |
128 | # endif | |
7a12c6bb RM |
129 | filedata = (void *) __mmap ((caddr_t) 0, st.st_size, PROT_READ, |
130 | MAP_FILE|MAP_COPY|MAP_INHERIT, fd, 0); | |
3a31f6f4 | 131 | if (__builtin_expect ((void *) filedata != MAP_FAILED, 1)) |
b6aa34eb | 132 | { |
3a31f6f4 | 133 | if (__builtin_expect (st.st_size < sizeof (*filedata), 0)) |
b6aa34eb UD |
134 | /* This cannot be a locale data file since it's too small. */ |
135 | goto puntfd; | |
136 | } | |
137 | else | |
7a12c6bb | 138 | { |
3a31f6f4 | 139 | if (__builtin_expect (errno, ENOSYS) == ENOSYS) |
7a12c6bb | 140 | { |
b6aa34eb | 141 | #endif /* _POSIX_MAPPED_FILES */ |
7a12c6bb | 142 | /* No mmap; allocate a buffer and read from the file. */ |
c84142e8 | 143 | mmaped = 0; |
7a12c6bb RM |
144 | filedata = malloc (st.st_size); |
145 | if (filedata != NULL) | |
146 | { | |
147 | off_t to_read = st.st_size; | |
148 | ssize_t nread; | |
149 | char *p = (char *) filedata; | |
150 | while (to_read > 0) | |
151 | { | |
152 | nread = __read (fd, p, to_read); | |
3a31f6f4 | 153 | if (__builtin_expect (nread, 1) <= 0) |
7a12c6bb RM |
154 | { |
155 | free (filedata); | |
156 | if (nread == 0) | |
c4029823 | 157 | __set_errno (EINVAL); /* Bizarreness going on. */ |
7a12c6bb RM |
158 | goto puntfd; |
159 | } | |
160 | p += nread; | |
161 | to_read -= nread; | |
162 | } | |
163 | } | |
164 | else | |
165 | goto puntfd; | |
c4029823 | 166 | __set_errno (save_err); |
b6aa34eb | 167 | #ifdef _POSIX_MAPPED_FILES |
7a12c6bb RM |
168 | } |
169 | else | |
170 | goto puntfd; | |
171 | } | |
b6aa34eb | 172 | #endif /* _POSIX_MAPPED_FILES */ |
933e73fa | 173 | |
3a31f6f4 | 174 | if (__builtin_expect (filedata->magic != LIMAGIC (category), 0)) |
4a33c2f5 | 175 | /* Bad data file in either byte order. */ |
933e73fa | 176 | { |
4a33c2f5 | 177 | puntmap: |
b6aa34eb | 178 | #ifdef _POSIX_MAPPED_FILES |
4a33c2f5 | 179 | __munmap ((caddr_t) filedata, st.st_size); |
b6aa34eb | 180 | #endif |
4a33c2f5 UD |
181 | puntfd: |
182 | __close (fd); | |
183 | return; | |
933e73fa RM |
184 | } |
185 | ||
3a31f6f4 UD |
186 | if (__builtin_expect (filedata->nstrings < _nl_category_num_items[category], |
187 | 0) | |
188 | || (__builtin_expect (sizeof *filedata | |
189 | + filedata->nstrings * sizeof (unsigned int) | |
190 | >= (size_t) st.st_size, 0))) | |
933e73fa RM |
191 | { |
192 | /* Insufficient data. */ | |
c4029823 | 193 | __set_errno (EINVAL); |
933e73fa RM |
194 | goto puntmap; |
195 | } | |
196 | ||
4b10dd6c | 197 | newdata = malloc (sizeof *newdata |
bece1bc4 | 198 | + filedata->nstrings * sizeof (union locale_data_value)); |
3a31f6f4 | 199 | if (newdata == NULL) |
933e73fa RM |
200 | goto puntmap; |
201 | ||
7a12c6bb | 202 | newdata->name = NULL; /* This will be filled if necessary in findlocale.c. */ |
933e73fa RM |
203 | newdata->filedata = (void *) filedata; |
204 | newdata->filesize = st.st_size; | |
c84142e8 UD |
205 | newdata->mmaped = mmaped; |
206 | newdata->usage_count = 0; | |
323fb88d UD |
207 | newdata->use_translit = 0; |
208 | newdata->options = NULL; | |
bece1bc4 | 209 | newdata->nstrings = filedata->nstrings; |
7a12c6bb | 210 | for (cnt = 0; cnt < newdata->nstrings; ++cnt) |
933e73fa | 211 | { |
4a33c2f5 | 212 | off_t idx = filedata->strindex[cnt]; |
3a31f6f4 | 213 | if (__builtin_expect (idx > newdata->filesize, 0)) |
933e73fa RM |
214 | { |
215 | free (newdata); | |
c4029823 | 216 | __set_errno (EINVAL); |
933e73fa RM |
217 | goto puntmap; |
218 | } | |
3a31f6f4 | 219 | if (__builtin_expect (_nl_value_types[category][cnt] == word, 0)) |
e43e0dd6 | 220 | { |
09bf6406 | 221 | assert (idx % __alignof__ (u_int32_t) == 0); |
e43e0dd6 UD |
222 | newdata->values[cnt].word = |
223 | *((u_int32_t *) (newdata->filedata + idx)); | |
224 | } | |
19bc17a9 | 225 | else |
7a12c6bb | 226 | newdata->values[cnt].string = newdata->filedata + idx; |
933e73fa RM |
227 | } |
228 | ||
f0bf9cb9 | 229 | __close (fd); |
7a12c6bb | 230 | file->data = newdata; |
933e73fa | 231 | } |
a5a0310d UD |
232 | |
233 | void | |
234 | _nl_unload_locale (struct locale_data *locale) | |
235 | { | |
b6aa34eb | 236 | #ifdef _POSIX_MAPPED_FILES |
3a31f6f4 | 237 | if (__builtin_expect (locale->mmaped, 1)) |
a5a0310d UD |
238 | __munmap ((caddr_t) locale->filedata, locale->filesize); |
239 | else | |
b6aa34eb | 240 | #endif |
a5a0310d UD |
241 | free ((void *) locale->filedata); |
242 | ||
6e5f8285 | 243 | free ((char *) locale->options); |
f1ba489e | 244 | free ((char *) locale->name); |
a5a0310d UD |
245 | free (locale); |
246 | } |