lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Functions to read locale data files. |
| 2 | Copyright (C) 1996-2015 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 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. |
| 10 | |
| 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 |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include <assert.h> |
| 21 | #include <errno.h> |
| 22 | #include <fcntl.h> |
| 23 | #include <locale.h> |
| 24 | #include <stdlib.h> |
| 25 | #include <string.h> |
| 26 | #include <unistd.h> |
| 27 | #ifdef _POSIX_MAPPED_FILES |
| 28 | # include <sys/mman.h> |
| 29 | #endif |
| 30 | #include <sys/stat.h> |
| 31 | |
| 32 | #include <not-cancel.h> |
| 33 | #include "localeinfo.h" |
| 34 | |
| 35 | |
| 36 | static const size_t _nl_category_num_items[] = |
| 37 | { |
| 38 | #define DEFINE_CATEGORY(category, category_name, items, a) \ |
| 39 | [category] = _NL_ITEM_INDEX (_NL_NUM_##category), |
| 40 | #include "categories.def" |
| 41 | #undef DEFINE_CATEGORY |
| 42 | }; |
| 43 | |
| 44 | |
| 45 | #define NO_PAREN(arg, rest...) arg, ##rest |
| 46 | |
| 47 | #define DEFINE_CATEGORY(category, category_name, items, a) \ |
| 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 *const _nl_value_types[] = |
| 55 | { |
| 56 | #define DEFINE_CATEGORY(category, category_name, items, a) \ |
| 57 | [category] = _nl_value_type_##category, |
| 58 | #include "categories.def" |
| 59 | #undef DEFINE_CATEGORY |
| 60 | }; |
| 61 | |
| 62 | |
| 63 | struct __locale_data * |
| 64 | internal_function |
| 65 | _nl_intern_locale_data (int category, const void *data, size_t datasize) |
| 66 | { |
| 67 | const struct |
| 68 | { |
| 69 | unsigned int magic; |
| 70 | unsigned int nstrings; |
| 71 | unsigned int strindex[0]; |
| 72 | } *const filedata = data; |
| 73 | struct __locale_data *newdata; |
| 74 | size_t cnt; |
| 75 | |
| 76 | if (__builtin_expect (datasize < sizeof *filedata, 0) |
| 77 | || __builtin_expect (filedata->magic != LIMAGIC (category), 0)) |
| 78 | { |
| 79 | /* Bad data file. */ |
| 80 | __set_errno (EINVAL); |
| 81 | return NULL; |
| 82 | } |
| 83 | |
| 84 | if (__builtin_expect (filedata->nstrings < _nl_category_num_items[category], |
| 85 | 0) |
| 86 | || (__builtin_expect (sizeof *filedata |
| 87 | + filedata->nstrings * sizeof (unsigned int) |
| 88 | >= datasize, 0))) |
| 89 | { |
| 90 | /* Insufficient data. */ |
| 91 | __set_errno (EINVAL); |
| 92 | return NULL; |
| 93 | } |
| 94 | |
| 95 | newdata = malloc (sizeof *newdata |
| 96 | + filedata->nstrings * sizeof (union locale_data_value)); |
| 97 | if (newdata == NULL) |
| 98 | return NULL; |
| 99 | |
| 100 | newdata->filedata = (void *) filedata; |
| 101 | newdata->filesize = datasize; |
| 102 | newdata->private.data = NULL; |
| 103 | newdata->private.cleanup = NULL; |
| 104 | newdata->usage_count = 0; |
| 105 | newdata->use_translit = 0; |
| 106 | newdata->nstrings = filedata->nstrings; |
| 107 | for (cnt = 0; cnt < newdata->nstrings; ++cnt) |
| 108 | { |
| 109 | size_t idx = filedata->strindex[cnt]; |
| 110 | if (__glibc_unlikely (idx > (size_t) newdata->filesize)) |
| 111 | { |
| 112 | puntdata: |
| 113 | free (newdata); |
| 114 | __set_errno (EINVAL); |
| 115 | return NULL; |
| 116 | } |
| 117 | |
| 118 | /* Determine the type. There is one special case: the LC_CTYPE |
| 119 | category can have more elements than there are in the |
| 120 | _nl_value_type_LC_XYZ array. There are all pointers. */ |
| 121 | switch (category) |
| 122 | { |
| 123 | #define CATTEST(cat) \ |
| 124 | case LC_##cat: \ |
| 125 | assert (cnt < (sizeof (_nl_value_type_LC_##cat) \ |
| 126 | / sizeof (_nl_value_type_LC_##cat[0]))); \ |
| 127 | break |
| 128 | CATTEST (NUMERIC); |
| 129 | CATTEST (TIME); |
| 130 | CATTEST (COLLATE); |
| 131 | CATTEST (MONETARY); |
| 132 | CATTEST (MESSAGES); |
| 133 | CATTEST (PAPER); |
| 134 | CATTEST (NAME); |
| 135 | CATTEST (ADDRESS); |
| 136 | CATTEST (TELEPHONE); |
| 137 | CATTEST (MEASUREMENT); |
| 138 | CATTEST (IDENTIFICATION); |
| 139 | default: |
| 140 | assert (category == LC_CTYPE); |
| 141 | break; |
| 142 | } |
| 143 | |
| 144 | if ((category == LC_CTYPE |
| 145 | && cnt >= (sizeof (_nl_value_type_LC_CTYPE) |
| 146 | / sizeof (_nl_value_type_LC_CTYPE[0]))) |
| 147 | || __builtin_expect (_nl_value_types[category][cnt] != word, 1)) |
| 148 | newdata->values[cnt].string = newdata->filedata + idx; |
| 149 | else |
| 150 | { |
| 151 | if (!LOCFILE_ALIGNED_P (idx)) |
| 152 | goto puntdata; |
| 153 | newdata->values[cnt].word = |
| 154 | *((const u_int32_t *) (newdata->filedata + idx)); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | return newdata; |
| 159 | } |
| 160 | |
| 161 | void |
| 162 | internal_function |
| 163 | _nl_load_locale (struct loaded_l10nfile *file, int category) |
| 164 | { |
| 165 | int fd; |
| 166 | void *filedata; |
| 167 | struct stat64 st; |
| 168 | struct __locale_data *newdata; |
| 169 | int save_err; |
| 170 | int alloc = ld_mapped; |
| 171 | |
| 172 | file->decided = 1; |
| 173 | file->data = NULL; |
| 174 | |
| 175 | fd = open_not_cancel_2 (file->filename, O_RDONLY | O_CLOEXEC); |
| 176 | if (__builtin_expect (fd, 0) < 0) |
| 177 | /* Cannot open the file. */ |
| 178 | return; |
| 179 | |
| 180 | if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0) |
| 181 | { |
| 182 | puntfd: |
| 183 | close_not_cancel_no_status (fd); |
| 184 | return; |
| 185 | } |
| 186 | if (__glibc_unlikely (S_ISDIR (st.st_mode))) |
| 187 | { |
| 188 | /* LOCALE/LC_foo is a directory; open LOCALE/LC_foo/SYS_LC_foo |
| 189 | instead. */ |
| 190 | char *newp; |
| 191 | size_t filenamelen; |
| 192 | |
| 193 | close_not_cancel_no_status (fd); |
| 194 | |
| 195 | filenamelen = strlen (file->filename); |
| 196 | newp = (char *) alloca (filenamelen |
| 197 | + 5 + _nl_category_name_sizes[category] + 1); |
| 198 | __mempcpy (__mempcpy (__mempcpy (newp, file->filename, filenamelen), |
| 199 | "/SYS_", 5), |
| 200 | _nl_category_names.str + _nl_category_name_idxs[category], |
| 201 | _nl_category_name_sizes[category] + 1); |
| 202 | |
| 203 | fd = open_not_cancel_2 (newp, O_RDONLY | O_CLOEXEC); |
| 204 | if (__builtin_expect (fd, 0) < 0) |
| 205 | return; |
| 206 | |
| 207 | if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0) |
| 208 | goto puntfd; |
| 209 | } |
| 210 | |
| 211 | /* Map in the file's data. */ |
| 212 | save_err = errno; |
| 213 | #ifdef _POSIX_MAPPED_FILES |
| 214 | # ifndef MAP_COPY |
| 215 | /* Linux seems to lack read-only copy-on-write. */ |
| 216 | # define MAP_COPY MAP_PRIVATE |
| 217 | # endif |
| 218 | # ifndef MAP_FILE |
| 219 | /* Some systems do not have this flag; it is superfluous. */ |
| 220 | # define MAP_FILE 0 |
| 221 | # endif |
| 222 | filedata = __mmap ((caddr_t) 0, st.st_size, |
| 223 | PROT_READ, MAP_FILE|MAP_COPY, fd, 0); |
| 224 | if (__glibc_unlikely (filedata == MAP_FAILED)) |
| 225 | { |
| 226 | filedata = NULL; |
| 227 | if (__builtin_expect (errno, ENOSYS) == ENOSYS) |
| 228 | { |
| 229 | #endif /* _POSIX_MAPPED_FILES */ |
| 230 | /* No mmap; allocate a buffer and read from the file. */ |
| 231 | alloc = ld_malloced; |
| 232 | filedata = malloc (st.st_size); |
| 233 | if (filedata != NULL) |
| 234 | { |
| 235 | off_t to_read = st.st_size; |
| 236 | ssize_t nread; |
| 237 | char *p = (char *) filedata; |
| 238 | while (to_read > 0) |
| 239 | { |
| 240 | nread = read_not_cancel (fd, p, to_read); |
| 241 | if (__builtin_expect (nread, 1) <= 0) |
| 242 | { |
| 243 | free (filedata); |
| 244 | if (nread == 0) |
| 245 | __set_errno (EINVAL); /* Bizarreness going on. */ |
| 246 | goto puntfd; |
| 247 | } |
| 248 | p += nread; |
| 249 | to_read -= nread; |
| 250 | } |
| 251 | __set_errno (save_err); |
| 252 | } |
| 253 | #ifdef _POSIX_MAPPED_FILES |
| 254 | } |
| 255 | } |
| 256 | #endif /* _POSIX_MAPPED_FILES */ |
| 257 | |
| 258 | /* We have mapped the data, so we no longer need the descriptor. */ |
| 259 | close_not_cancel_no_status (fd); |
| 260 | |
| 261 | if (__glibc_unlikely (filedata == NULL)) |
| 262 | /* We failed to map or read the data. */ |
| 263 | return; |
| 264 | |
| 265 | newdata = _nl_intern_locale_data (category, filedata, st.st_size); |
| 266 | if (__glibc_unlikely (newdata == NULL)) |
| 267 | /* Bad data. */ |
| 268 | { |
| 269 | #ifdef _POSIX_MAPPED_FILES |
| 270 | if (alloc == ld_mapped) |
| 271 | __munmap ((caddr_t) filedata, st.st_size); |
| 272 | #endif |
| 273 | return; |
| 274 | } |
| 275 | |
| 276 | /* _nl_intern_locale_data leaves us these fields to initialize. */ |
| 277 | newdata->name = NULL; /* This will be filled if necessary in findlocale.c. */ |
| 278 | newdata->alloc = alloc; |
| 279 | |
| 280 | file->data = newdata; |
| 281 | } |
| 282 | |
| 283 | void |
| 284 | internal_function |
| 285 | _nl_unload_locale (struct __locale_data *locale) |
| 286 | { |
| 287 | if (locale->private.cleanup) |
| 288 | (*locale->private.cleanup) (locale); |
| 289 | |
| 290 | switch (__builtin_expect (locale->alloc, ld_mapped)) |
| 291 | { |
| 292 | case ld_malloced: |
| 293 | free ((void *) locale->filedata); |
| 294 | break; |
| 295 | case ld_mapped: |
| 296 | #ifdef _POSIX_MAPPED_FILES |
| 297 | __munmap ((caddr_t) locale->filedata, locale->filesize); |
| 298 | break; |
| 299 | #endif |
| 300 | case ld_archive: /* Nothing to do. */ |
| 301 | break; |
| 302 | } |
| 303 | |
| 304 | if (__builtin_expect (locale->alloc, ld_mapped) != ld_archive) |
| 305 | free ((char *) locale->name); |
| 306 | |
| 307 | free (locale); |
| 308 | } |