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.
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.
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.
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/>. */
27 #ifdef _POSIX_MAPPED_FILES
28 # include <sys/mman.h>
32 #include <not-cancel.h>
33 #include "localeinfo.h"
36 static const size_t _nl_category_num_items[] =
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
45 #define NO_PAREN(arg, rest...) arg, ##rest
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
54 static const enum value_type *const _nl_value_types[] =
56 #define DEFINE_CATEGORY(category, category_name, items, a) \
57 [category] = _nl_value_type_##category,
58 #include "categories.def"
59 #undef DEFINE_CATEGORY
63 struct __locale_data *
65 _nl_intern_locale_data (int category, const void *data, size_t datasize)
70 unsigned int nstrings;
71 unsigned int strindex[0];
72 } *const filedata = data;
73 struct __locale_data *newdata;
76 if (__builtin_expect (datasize < sizeof *filedata, 0)
77 || __builtin_expect (filedata->magic != LIMAGIC (category), 0))
84 if (__builtin_expect (filedata->nstrings < _nl_category_num_items[category],
86 || (__builtin_expect (sizeof *filedata
87 + filedata->nstrings * sizeof (unsigned int)
90 /* Insufficient data. */
95 newdata = malloc (sizeof *newdata
96 + filedata->nstrings * sizeof (union locale_data_value));
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)
109 size_t idx = filedata->strindex[cnt];
110 if (__glibc_unlikely (idx > (size_t) newdata->filesize))
114 __set_errno (EINVAL);
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. */
123 #define CATTEST(cat) \
125 assert (cnt < (sizeof (_nl_value_type_LC_##cat) \
126 / sizeof (_nl_value_type_LC_##cat[0]))); \
137 CATTEST (MEASUREMENT);
138 CATTEST (IDENTIFICATION);
140 assert (category == LC_CTYPE);
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;
151 if (!LOCFILE_ALIGNED_P (idx))
153 newdata->values[cnt].word =
154 *((const u_int32_t *) (newdata->filedata + idx));
163 _nl_load_locale (struct loaded_l10nfile *file, int category)
168 struct __locale_data *newdata;
170 int alloc = ld_mapped;
175 fd = open_not_cancel_2 (file->filename, O_RDONLY | O_CLOEXEC);
176 if (__builtin_expect (fd, 0) < 0)
177 /* Cannot open the file. */
180 if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0)
183 close_not_cancel_no_status (fd);
186 if (__glibc_unlikely (S_ISDIR (st.st_mode)))
188 /* LOCALE/LC_foo is a directory; open LOCALE/LC_foo/SYS_LC_foo
193 close_not_cancel_no_status (fd);
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),
200 _nl_category_names.str + _nl_category_name_idxs[category],
201 _nl_category_name_sizes[category] + 1);
203 fd = open_not_cancel_2 (newp, O_RDONLY | O_CLOEXEC);
204 if (__builtin_expect (fd, 0) < 0)
207 if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0)
211 /* Map in the file's data. */
213 #ifdef _POSIX_MAPPED_FILES
215 /* Linux seems to lack read-only copy-on-write. */
216 # define MAP_COPY MAP_PRIVATE
219 /* Some systems do not have this flag; it is superfluous. */
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))
227 if (__builtin_expect (errno, ENOSYS) == ENOSYS)
229 #endif /* _POSIX_MAPPED_FILES */
230 /* No mmap; allocate a buffer and read from the file. */
232 filedata = malloc (st.st_size);
233 if (filedata != NULL)
235 off_t to_read = st.st_size;
237 char *p = (char *) filedata;
240 nread = read_not_cancel (fd, p, to_read);
241 if (__builtin_expect (nread, 1) <= 0)
245 __set_errno (EINVAL); /* Bizarreness going on. */
251 __set_errno (save_err);
253 #ifdef _POSIX_MAPPED_FILES
256 #endif /* _POSIX_MAPPED_FILES */
258 /* We have mapped the data, so we no longer need the descriptor. */
259 close_not_cancel_no_status (fd);
261 if (__glibc_unlikely (filedata == NULL))
262 /* We failed to map or read the data. */
265 newdata = _nl_intern_locale_data (category, filedata, st.st_size);
266 if (__glibc_unlikely (newdata == NULL))
269 #ifdef _POSIX_MAPPED_FILES
270 if (alloc == ld_mapped)
271 __munmap ((caddr_t) filedata, st.st_size);
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;
280 file->data = newdata;
285 _nl_unload_locale (struct __locale_data *locale)
287 if (locale->private.cleanup)
288 (*locale->private.cleanup) (locale);
290 switch (__builtin_expect (locale->alloc, ld_mapped))
293 free ((void *) locale->filedata);
296 #ifdef _POSIX_MAPPED_FILES
297 __munmap ((caddr_t) locale->filedata, locale->filesize);
300 case ld_archive: /* Nothing to do. */
304 if (__builtin_expect (locale->alloc, ld_mapped) != ld_archive)
305 free ((char *) locale->name);