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ce4d8b66 | 1 | /* Functions to read locale data files. |
d614a753 | 2 | Copyright (C) 1996-2020 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 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 17 | License along with the GNU C Library; if not, see |
5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
933e73fa | 19 | |
e43e0dd6 | 20 | #include <assert.h> |
933e73fa RM |
21 | #include <errno.h> |
22 | #include <fcntl.h> | |
3e154a6f | 23 | #include <locale.h> |
933e73fa RM |
24 | #include <stdlib.h> |
25 | #include <string.h> | |
7a12c6bb | 26 | #include <unistd.h> |
b6aa34eb UD |
27 | #ifdef _POSIX_MAPPED_FILES |
28 | # include <sys/mman.h> | |
29 | #endif | |
7a12c6bb RM |
30 | #include <sys/stat.h> |
31 | ||
72ef277e | 32 | #include <not-cancel.h> |
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 | ||
f301e533 RL |
47 | /* The size of the array must be specified explicitly because some of |
48 | the 'items' may be subarrays, which will cause the compiler to deduce | |
49 | an incorrect size from the initializer. */ | |
4b10dd6c | 50 | #define DEFINE_CATEGORY(category, category_name, items, a) \ |
f301e533 RL |
51 | static const enum value_type _nl_value_type_##category \ |
52 | [_NL_ITEM_INDEX (_NL_NUM_##category)] = { NO_PAREN items }; | |
19bc17a9 RM |
53 | #define DEFINE_ELEMENT(element, element_name, optstd, type, rest...) \ |
54 | [_NL_ITEM_INDEX (element)] = type, | |
55 | #include "categories.def" | |
56 | #undef DEFINE_CATEGORY | |
57 | ||
aa87e915 | 58 | static const enum value_type *const _nl_value_types[] = |
19bc17a9 | 59 | { |
4b10dd6c | 60 | #define DEFINE_CATEGORY(category, category_name, items, a) \ |
19bc17a9 RM |
61 | [category] = _nl_value_type_##category, |
62 | #include "categories.def" | |
63 | #undef DEFINE_CATEGORY | |
64 | }; | |
65 | ||
933e73fa | 66 | |
f095bb72 | 67 | struct __locale_data * |
cb09a2cd | 68 | _nl_intern_locale_data (int category, const void *data, size_t datasize) |
933e73fa | 69 | { |
cb09a2cd | 70 | const struct |
933e73fa RM |
71 | { |
72 | unsigned int magic; | |
73 | unsigned int nstrings; | |
74 | unsigned int strindex[0]; | |
cb09a2cd | 75 | } *const filedata = data; |
f095bb72 | 76 | struct __locale_data *newdata; |
cb09a2cd RM |
77 | size_t cnt; |
78 | ||
79 | if (__builtin_expect (datasize < sizeof *filedata, 0) | |
80 | || __builtin_expect (filedata->magic != LIMAGIC (category), 0)) | |
81 | { | |
82 | /* Bad data file. */ | |
83 | __set_errno (EINVAL); | |
84 | return NULL; | |
85 | } | |
86 | ||
87 | if (__builtin_expect (filedata->nstrings < _nl_category_num_items[category], | |
88 | 0) | |
89 | || (__builtin_expect (sizeof *filedata | |
90 | + filedata->nstrings * sizeof (unsigned int) | |
91 | >= datasize, 0))) | |
92 | { | |
93 | /* Insufficient data. */ | |
94 | __set_errno (EINVAL); | |
95 | return NULL; | |
96 | } | |
97 | ||
98 | newdata = malloc (sizeof *newdata | |
99 | + filedata->nstrings * sizeof (union locale_data_value)); | |
100 | if (newdata == NULL) | |
101 | return NULL; | |
102 | ||
103 | newdata->filedata = (void *) filedata; | |
104 | newdata->filesize = datasize; | |
df9f41c9 RM |
105 | newdata->private.data = NULL; |
106 | newdata->private.cleanup = NULL; | |
cb09a2cd RM |
107 | newdata->usage_count = 0; |
108 | newdata->use_translit = 0; | |
109 | newdata->nstrings = filedata->nstrings; | |
110 | for (cnt = 0; cnt < newdata->nstrings; ++cnt) | |
111 | { | |
112 | size_t idx = filedata->strindex[cnt]; | |
a1ffb40e | 113 | if (__glibc_unlikely (idx > (size_t) newdata->filesize)) |
cb09a2cd RM |
114 | { |
115 | puntdata: | |
116 | free (newdata); | |
117 | __set_errno (EINVAL); | |
118 | return NULL; | |
119 | } | |
fe6ce170 UD |
120 | |
121 | /* Determine the type. There is one special case: the LC_CTYPE | |
122 | category can have more elements than there are in the | |
123 | _nl_value_type_LC_XYZ array. There are all pointers. */ | |
124 | switch (category) | |
125 | { | |
126 | #define CATTEST(cat) \ | |
0062ace2 LC |
127 | case LC_##cat: \ |
128 | if (cnt >= (sizeof (_nl_value_type_LC_##cat) \ | |
129 | / sizeof (_nl_value_type_LC_##cat[0]))) \ | |
130 | goto puntdata; \ | |
fe6ce170 UD |
131 | break |
132 | CATTEST (NUMERIC); | |
133 | CATTEST (TIME); | |
134 | CATTEST (COLLATE); | |
135 | CATTEST (MONETARY); | |
136 | CATTEST (MESSAGES); | |
137 | CATTEST (PAPER); | |
138 | CATTEST (NAME); | |
139 | CATTEST (ADDRESS); | |
140 | CATTEST (TELEPHONE); | |
141 | CATTEST (MEASUREMENT); | |
142 | CATTEST (IDENTIFICATION); | |
143 | default: | |
144 | assert (category == LC_CTYPE); | |
145 | break; | |
146 | } | |
147 | ||
148 | if ((category == LC_CTYPE | |
149 | && cnt >= (sizeof (_nl_value_type_LC_CTYPE) | |
150 | / sizeof (_nl_value_type_LC_CTYPE[0]))) | |
151 | || __builtin_expect (_nl_value_types[category][cnt] != word, 1)) | |
152 | newdata->values[cnt].string = newdata->filedata + idx; | |
153 | else | |
cb09a2cd | 154 | { |
7602d070 | 155 | if (!LOCFILE_ALIGNED_P (idx)) |
cb09a2cd RM |
156 | goto puntdata; |
157 | newdata->values[cnt].word = | |
d9fee042 | 158 | *((const uint32_t *) (newdata->filedata + idx)); |
cb09a2cd | 159 | } |
cb09a2cd RM |
160 | } |
161 | ||
162 | return newdata; | |
163 | } | |
164 | ||
165 | void | |
cb09a2cd RM |
166 | _nl_load_locale (struct loaded_l10nfile *file, int category) |
167 | { | |
168 | int fd; | |
169 | void *filedata; | |
8edf6e0d | 170 | struct stat64 st; |
f095bb72 | 171 | struct __locale_data *newdata; |
7a12c6bb | 172 | int save_err; |
cb09a2cd | 173 | int alloc = ld_mapped; |
933e73fa | 174 | |
7a12c6bb RM |
175 | file->decided = 1; |
176 | file->data = NULL; | |
177 | ||
c2284574 | 178 | fd = __open_nocancel (file->filename, O_RDONLY | O_CLOEXEC); |
3a31f6f4 | 179 | if (__builtin_expect (fd, 0) < 0) |
7a12c6bb RM |
180 | /* Cannot open the file. */ |
181 | return; | |
182 | ||
04986243 | 183 | if (__builtin_expect (__fstat64 (fd, &st), 0) < 0) |
cb09a2cd RM |
184 | { |
185 | puntfd: | |
c181840c | 186 | __close_nocancel_nostatus (fd); |
cb09a2cd RM |
187 | return; |
188 | } | |
a1ffb40e | 189 | if (__glibc_unlikely (S_ISDIR (st.st_mode))) |
933e73fa | 190 | { |
7a12c6bb | 191 | /* LOCALE/LC_foo is a directory; open LOCALE/LC_foo/SYS_LC_foo |
f095bb72 | 192 | instead. */ |
7a12c6bb | 193 | char *newp; |
b6aa34eb | 194 | size_t filenamelen; |
036cc82f | 195 | |
c181840c | 196 | __close_nocancel_nostatus (fd); |
7a12c6bb | 197 | |
b6aa34eb UD |
198 | filenamelen = strlen (file->filename); |
199 | newp = (char *) alloca (filenamelen | |
7a12c6bb | 200 | + 5 + _nl_category_name_sizes[category] + 1); |
b6aa34eb | 201 | __mempcpy (__mempcpy (__mempcpy (newp, file->filename, filenamelen), |
de18a706 | 202 | "/SYS_", 5), _nl_category_names_get (category), |
b6aa34eb | 203 | _nl_category_name_sizes[category] + 1); |
7a12c6bb | 204 | |
c2284574 | 205 | fd = __open_nocancel (newp, O_RDONLY | O_CLOEXEC); |
3a31f6f4 | 206 | if (__builtin_expect (fd, 0) < 0) |
7a12c6bb RM |
207 | return; |
208 | ||
04986243 | 209 | if (__builtin_expect (__fstat64 (fd, &st), 0) < 0) |
7a12c6bb | 210 | goto puntfd; |
933e73fa RM |
211 | } |
212 | ||
7a12c6bb RM |
213 | /* Map in the file's data. */ |
214 | save_err = errno; | |
b6aa34eb UD |
215 | #ifdef _POSIX_MAPPED_FILES |
216 | # ifndef MAP_COPY | |
7a12c6bb | 217 | /* Linux seems to lack read-only copy-on-write. */ |
b6aa34eb UD |
218 | # define MAP_COPY MAP_PRIVATE |
219 | # endif | |
220 | # ifndef MAP_FILE | |
7a12c6bb | 221 | /* Some systems do not have this flag; it is superfluous. */ |
b6aa34eb UD |
222 | # define MAP_FILE 0 |
223 | # endif | |
cb09a2cd RM |
224 | filedata = __mmap ((caddr_t) 0, st.st_size, |
225 | PROT_READ, MAP_FILE|MAP_COPY, fd, 0); | |
a1ffb40e | 226 | if (__glibc_unlikely (filedata == MAP_FAILED)) |
7a12c6bb | 227 | { |
8b2f25c2 | 228 | filedata = NULL; |
3a31f6f4 | 229 | if (__builtin_expect (errno, ENOSYS) == ENOSYS) |
7a12c6bb | 230 | { |
b6aa34eb | 231 | #endif /* _POSIX_MAPPED_FILES */ |
7a12c6bb | 232 | /* No mmap; allocate a buffer and read from the file. */ |
cb09a2cd | 233 | alloc = ld_malloced; |
7a12c6bb RM |
234 | filedata = malloc (st.st_size); |
235 | if (filedata != NULL) | |
236 | { | |
237 | off_t to_read = st.st_size; | |
238 | ssize_t nread; | |
239 | char *p = (char *) filedata; | |
240 | while (to_read > 0) | |
241 | { | |
a748eb31 | 242 | nread = __read_nocancel (fd, p, to_read); |
3a31f6f4 | 243 | if (__builtin_expect (nread, 1) <= 0) |
7a12c6bb RM |
244 | { |
245 | free (filedata); | |
246 | if (nread == 0) | |
c4029823 | 247 | __set_errno (EINVAL); /* Bizarreness going on. */ |
7a12c6bb RM |
248 | goto puntfd; |
249 | } | |
250 | p += nread; | |
251 | to_read -= nread; | |
252 | } | |
cb09a2cd | 253 | __set_errno (save_err); |
7a12c6bb | 254 | } |
b6aa34eb | 255 | #ifdef _POSIX_MAPPED_FILES |
7a12c6bb | 256 | } |
7a12c6bb | 257 | } |
b6aa34eb | 258 | #endif /* _POSIX_MAPPED_FILES */ |
933e73fa | 259 | |
cb09a2cd | 260 | /* We have mapped the data, so we no longer need the descriptor. */ |
c181840c | 261 | __close_nocancel_nostatus (fd); |
cb09a2cd | 262 | |
a1ffb40e | 263 | if (__glibc_unlikely (filedata == NULL)) |
cb09a2cd RM |
264 | /* We failed to map or read the data. */ |
265 | return; | |
266 | ||
267 | newdata = _nl_intern_locale_data (category, filedata, st.st_size); | |
a1ffb40e | 268 | if (__glibc_unlikely (newdata == NULL)) |
cb09a2cd | 269 | /* Bad data. */ |
933e73fa | 270 | { |
b6aa34eb | 271 | #ifdef _POSIX_MAPPED_FILES |
cb09a2cd RM |
272 | if (alloc == ld_mapped) |
273 | __munmap ((caddr_t) filedata, st.st_size); | |
b6aa34eb | 274 | #endif |
4a33c2f5 | 275 | return; |
933e73fa RM |
276 | } |
277 | ||
cb09a2cd | 278 | /* _nl_intern_locale_data leaves us these fields to initialize. */ |
7a12c6bb | 279 | newdata->name = NULL; /* This will be filled if necessary in findlocale.c. */ |
cb09a2cd | 280 | newdata->alloc = alloc; |
933e73fa | 281 | |
7a12c6bb | 282 | file->data = newdata; |
933e73fa | 283 | } |
a5a0310d UD |
284 | |
285 | void | |
f095bb72 | 286 | _nl_unload_locale (struct __locale_data *locale) |
a5a0310d | 287 | { |
df9f41c9 RM |
288 | if (locale->private.cleanup) |
289 | (*locale->private.cleanup) (locale); | |
290 | ||
cb09a2cd RM |
291 | switch (__builtin_expect (locale->alloc, ld_mapped)) |
292 | { | |
293 | case ld_malloced: | |
294 | free ((void *) locale->filedata); | |
295 | break; | |
296 | case ld_mapped: | |
b6aa34eb | 297 | #ifdef _POSIX_MAPPED_FILES |
cb09a2cd RM |
298 | __munmap ((caddr_t) locale->filedata, locale->filesize); |
299 | break; | |
b6aa34eb | 300 | #endif |
cb09a2cd RM |
301 | case ld_archive: /* Nothing to do. */ |
302 | break; | |
303 | } | |
304 | ||
305 | if (__builtin_expect (locale->alloc, ld_mapped) != ld_archive) | |
306 | free ((char *) locale->name); | |
a5a0310d UD |
307 | |
308 | free (locale); | |
309 | } |