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4f031072 | 1 | /* Copyright (C) 1996-2003, 2006, 2010, 2011 Free Software Foundation, Inc. |
e4cf5070 | 2 | This file is part of the GNU C Library. |
4b10dd6c | 3 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. |
7a12c6bb | 4 | |
e4cf5070 | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 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. | |
7a12c6bb | 9 | |
e4cf5070 UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
7a12c6bb | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
7a12c6bb | 18 | |
e7f21fa6 | 19 | #include <assert.h> |
7a12c6bb RM |
20 | #include <locale.h> |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
3081378b | 23 | #include <unistd.h> |
72c74375 UD |
24 | #ifdef _POSIX_MAPPED_FILES |
25 | # include <sys/mman.h> | |
26 | #endif | |
7a12c6bb RM |
27 | |
28 | #include "localeinfo.h" | |
e7f21fa6 | 29 | #include "../iconv/gconv_charset.h" |
dd9423a6 | 30 | #include "../iconv/gconv_int.h" |
7a12c6bb RM |
31 | |
32 | ||
9a411bf5 RM |
33 | #ifdef NL_CURRENT_INDIRECT |
34 | # define DEFINE_CATEGORY(category, category_name, items, a) \ | |
f095bb72 | 35 | extern struct __locale_data _nl_C_##category; \ |
9a411bf5 RM |
36 | weak_extern (_nl_C_##category) |
37 | # include "categories.def" | |
38 | # undef DEFINE_CATEGORY | |
39 | ||
40 | /* Array indexed by category of pointers to _nl_C_CATEGORY slots. | |
41 | Elements are zero for categories whose data is never used. */ | |
f095bb72 | 42 | struct __locale_data *const _nl_C[] attribute_hidden = |
9a411bf5 RM |
43 | { |
44 | # define DEFINE_CATEGORY(category, category_name, items, a) \ | |
45 | [category] = &_nl_C_##category, | |
46 | # include "categories.def" | |
47 | # undef DEFINE_CATEGORY | |
48 | }; | |
30c14c31 RM |
49 | #else |
50 | # define _nl_C (_nl_C_locobj.__locales) | |
51 | #endif | |
7a12c6bb RM |
52 | |
53 | ||
54 | /* For each category we keep a list of records for the locale files | |
55 | which are somehow addressed. */ | |
5746ef6f | 56 | struct loaded_l10nfile *_nl_locale_file_list[__LC_LAST]; |
7a12c6bb | 57 | |
cb09a2cd RM |
58 | const char _nl_default_locale_path[] attribute_hidden = LOCALEDIR; |
59 | ||
7a12c6bb | 60 | |
f095bb72 | 61 | struct __locale_data * |
cb09a2cd | 62 | internal_function |
7a12c6bb | 63 | _nl_find_locale (const char *locale_path, size_t locale_path_len, |
c84142e8 | 64 | int category, const char **name) |
7a12c6bb RM |
65 | { |
66 | int mask; | |
67 | /* Name of the locale for this category. */ | |
68 | char *loc_name; | |
69 | const char *language; | |
70 | const char *modifier; | |
71 | const char *territory; | |
72 | const char *codeset; | |
73 | const char *normalized_codeset; | |
7a12c6bb RM |
74 | struct loaded_l10nfile *locale_file; |
75 | ||
63336471 | 76 | if ((*name)[0] == '\0') |
7a12c6bb RM |
77 | { |
78 | /* The user decides which locale to use by setting environment | |
79 | variables. */ | |
80 | *name = getenv ("LC_ALL"); | |
81 | if (*name == NULL || (*name)[0] == '\0') | |
9446614c UD |
82 | *name = getenv (_nl_category_names.str |
83 | + _nl_category_name_idxs[category]); | |
7a12c6bb RM |
84 | if (*name == NULL || (*name)[0] == '\0') |
85 | *name = getenv ("LANG"); | |
7a12c6bb RM |
86 | } |
87 | ||
63336471 UD |
88 | if (*name == NULL || (*name)[0] == '\0' |
89 | || (__builtin_expect (__libc_enable_secure, 0) | |
6adc15f5 | 90 | && strchr (*name, '/') != NULL)) |
63336471 UD |
91 | *name = (char *) _nl_C_name; |
92 | ||
3a31f6f4 UD |
93 | if (__builtin_expect (strcmp (*name, _nl_C_name), 1) == 0 |
94 | || __builtin_expect (strcmp (*name, _nl_POSIX_name), 1) == 0) | |
7a12c6bb RM |
95 | { |
96 | /* We need not load anything. The needed data is contained in | |
97 | the library itself. */ | |
98 | *name = (char *) _nl_C_name; | |
99 | return _nl_C[category]; | |
100 | } | |
101 | ||
cb09a2cd RM |
102 | /* We really have to load some data. First we try the archive, |
103 | but only if there was no LOCPATH environment variable specified. */ | |
104 | if (__builtin_expect (locale_path == NULL, 1)) | |
105 | { | |
f095bb72 UD |
106 | struct __locale_data *data |
107 | = _nl_load_locale_from_archive (category, name); | |
cb09a2cd RM |
108 | if (__builtin_expect (data != NULL, 1)) |
109 | return data; | |
110 | ||
111 | /* Nothing in the archive. Set the default path to search below. */ | |
112 | locale_path = _nl_default_locale_path; | |
113 | locale_path_len = sizeof _nl_default_locale_path; | |
114 | } | |
115 | ||
7a12c6bb RM |
116 | /* We really have to load some data. First see whether the name is |
117 | an alias. Please note that this makes it impossible to have "C" | |
118 | or "POSIX" as aliases. */ | |
fa0bc87c | 119 | loc_name = (char *) _nl_expand_alias (*name); |
7a12c6bb RM |
120 | if (loc_name == NULL) |
121 | /* It is no alias. */ | |
c84142e8 | 122 | loc_name = (char *) *name; |
7a12c6bb RM |
123 | |
124 | /* Make a writable copy of the locale name. */ | |
72c74375 | 125 | loc_name = strdupa (loc_name); |
7a12c6bb RM |
126 | |
127 | /* LOCALE can consist of up to four recognized parts for the XPG syntax: | |
128 | ||
129 | language[_territory[.codeset]][@modifier] | |
130 | ||
7a12c6bb RM |
131 | Beside the first all of them are allowed to be missing. If the |
132 | full specified locale is not found, the less specific one are | |
cb09a2cd | 133 | looked for. The various part will be stripped off according to |
7a12c6bb | 134 | the following order: |
e155c801 UD |
135 | (1) codeset |
136 | (2) normalized codeset | |
137 | (3) territory | |
138 | (4) modifier | |
7a12c6bb RM |
139 | */ |
140 | mask = _nl_explode_name (loc_name, &language, &modifier, &territory, | |
e155c801 | 141 | &codeset, &normalized_codeset); |
4f031072 UD |
142 | if (mask == -1) |
143 | /* Memory allocate problem. */ | |
144 | return NULL; | |
7a12c6bb RM |
145 | |
146 | /* If exactly this locale was already asked for we have an entry with | |
147 | the complete name. */ | |
5746ef6f | 148 | locale_file = _nl_make_l10nflist (&_nl_locale_file_list[category], |
7a12c6bb RM |
149 | locale_path, locale_path_len, mask, |
150 | language, territory, codeset, | |
e155c801 | 151 | normalized_codeset, modifier, |
9446614c UD |
152 | _nl_category_names.str |
153 | + _nl_category_name_idxs[category], 0); | |
7a12c6bb RM |
154 | |
155 | if (locale_file == NULL) | |
156 | { | |
157 | /* Find status record for addressed locale file. We have to search | |
158 | through all directories in the locale path. */ | |
5746ef6f | 159 | locale_file = _nl_make_l10nflist (&_nl_locale_file_list[category], |
7a12c6bb RM |
160 | locale_path, locale_path_len, mask, |
161 | language, territory, codeset, | |
e155c801 | 162 | normalized_codeset, modifier, |
9446614c UD |
163 | _nl_category_names.str |
164 | + _nl_category_name_idxs[category], 1); | |
7a12c6bb RM |
165 | if (locale_file == NULL) |
166 | /* This means we are out of core. */ | |
167 | return NULL; | |
168 | } | |
7a12c6bb | 169 | |
727211c4 UD |
170 | /* The space for normalized_codeset is dynamically allocated. Free it. */ |
171 | if (mask & XPG_NORM_CODESET) | |
172 | free ((void *) normalized_codeset); | |
173 | ||
7a12c6bb RM |
174 | if (locale_file->decided == 0) |
175 | _nl_load_locale (locale_file, category); | |
176 | ||
177 | if (locale_file->data == NULL) | |
178 | { | |
179 | int cnt; | |
180 | for (cnt = 0; locale_file->successor[cnt] != NULL; ++cnt) | |
181 | { | |
182 | if (locale_file->successor[cnt]->decided == 0) | |
183 | _nl_load_locale (locale_file->successor[cnt], category); | |
184 | if (locale_file->successor[cnt]->data != NULL) | |
185 | break; | |
186 | } | |
187 | /* Move the entry we found (or NULL) to the first place of | |
188 | successors. */ | |
189 | locale_file->successor[0] = locale_file->successor[cnt]; | |
190 | locale_file = locale_file->successor[cnt]; | |
7a12c6bb | 191 | |
3a31f6f4 UD |
192 | if (locale_file == NULL) |
193 | return NULL; | |
194 | } | |
7a12c6bb | 195 | |
e7f21fa6 UD |
196 | /* The LC_CTYPE category allows to check whether a locale is really |
197 | usable. If the locale name contains a charset name and the | |
198 | charset name used in the locale (present in the LC_CTYPE data) is | |
199 | not the same (after resolving aliases etc) we reject the locale | |
200 | since using it would irritate users expecting the charset named | |
201 | in the locale name. */ | |
202 | if (codeset != NULL) | |
203 | { | |
204 | /* Get the codeset information from the locale file. */ | |
205 | static const int codeset_idx[] = | |
206 | { | |
207 | [__LC_CTYPE] = _NL_ITEM_INDEX (CODESET), | |
208 | [__LC_NUMERIC] = _NL_ITEM_INDEX (_NL_NUMERIC_CODESET), | |
209 | [__LC_TIME] = _NL_ITEM_INDEX (_NL_TIME_CODESET), | |
210 | [__LC_COLLATE] = _NL_ITEM_INDEX (_NL_COLLATE_CODESET), | |
211 | [__LC_MONETARY] = _NL_ITEM_INDEX (_NL_MONETARY_CODESET), | |
212 | [__LC_MESSAGES] = _NL_ITEM_INDEX (_NL_MESSAGES_CODESET), | |
213 | [__LC_PAPER] = _NL_ITEM_INDEX (_NL_PAPER_CODESET), | |
214 | [__LC_NAME] = _NL_ITEM_INDEX (_NL_NAME_CODESET), | |
215 | [__LC_ADDRESS] = _NL_ITEM_INDEX (_NL_ADDRESS_CODESET), | |
216 | [__LC_TELEPHONE] = _NL_ITEM_INDEX (_NL_TELEPHONE_CODESET), | |
217 | [__LC_MEASUREMENT] = _NL_ITEM_INDEX (_NL_MEASUREMENT_CODESET), | |
218 | [__LC_IDENTIFICATION] = _NL_ITEM_INDEX (_NL_IDENTIFICATION_CODESET) | |
219 | }; | |
f095bb72 | 220 | const struct __locale_data *data; |
e7f21fa6 UD |
221 | const char *locale_codeset; |
222 | char *clocale_codeset; | |
223 | char *ccodeset; | |
224 | ||
f095bb72 | 225 | data = (const struct __locale_data *) locale_file->data; |
e7f21fa6 UD |
226 | locale_codeset = |
227 | (const char *) data->values[codeset_idx[category]].string; | |
228 | assert (locale_codeset != NULL); | |
229 | /* Note the length of the allocated memory: +3 for up to two slashes | |
230 | and the NUL byte. */ | |
231 | clocale_codeset = (char *) alloca (strlen (locale_codeset) + 3); | |
232 | strip (clocale_codeset, locale_codeset); | |
233 | ||
234 | ccodeset = (char *) alloca (strlen (codeset) + 3); | |
235 | strip (ccodeset, codeset); | |
236 | ||
9a018f6c UD |
237 | if (__gconv_compare_alias (upstr (ccodeset, ccodeset), |
238 | upstr (clocale_codeset, | |
239 | clocale_codeset)) != 0) | |
e7f21fa6 UD |
240 | /* The codesets are not identical, don't use the locale. */ |
241 | return NULL; | |
242 | } | |
243 | ||
7a12c6bb RM |
244 | /* Determine the locale name for which loading succeeded. This |
245 | information comes from the file name. The form is | |
036cc82f | 246 | <path>/<locale>/LC_foo. We must extract the <locale> part. */ |
f095bb72 | 247 | if (((const struct __locale_data *) locale_file->data)->name == NULL) |
7a12c6bb | 248 | { |
036cc82f | 249 | char *cp, *endp; |
7a12c6bb RM |
250 | |
251 | endp = strrchr (locale_file->filename, '/'); | |
252 | cp = endp - 1; | |
253 | while (cp[-1] != '/') | |
254 | --cp; | |
f095bb72 UD |
255 | ((struct __locale_data *) locale_file->data)->name |
256 | = __strndup (cp, endp - cp); | |
7a12c6bb | 257 | } |
7a12c6bb | 258 | |
323fb88d | 259 | /* Determine whether the user wants transliteration or not. */ |
5f078c32 UD |
260 | if (modifier != NULL |
261 | && __strcasecmp_l (modifier, "TRANSLIT", _nl_C_locobj_ptr) == 0) | |
f095bb72 | 262 | ((struct __locale_data *) locale_file->data)->use_translit = 1; |
323fb88d | 263 | |
c84142e8 | 264 | /* Increment the usage count. */ |
f095bb72 | 265 | if (((const struct __locale_data *) locale_file->data)->usage_count |
a5a0310d | 266 | < MAX_USAGE_COUNT) |
f095bb72 | 267 | ++((struct __locale_data *) locale_file->data)->usage_count; |
c84142e8 | 268 | |
f095bb72 | 269 | return (struct __locale_data *) locale_file->data; |
7a12c6bb | 270 | } |
c84142e8 UD |
271 | |
272 | ||
273 | /* Calling this function assumes the lock for handling global locale data | |
274 | is acquired. */ | |
275 | void | |
cb09a2cd | 276 | internal_function |
f095bb72 | 277 | _nl_remove_locale (int locale, struct __locale_data *data) |
c84142e8 UD |
278 | { |
279 | if (--data->usage_count == 0) | |
280 | { | |
0f283ffc | 281 | if (data->alloc != ld_archive) |
c84142e8 | 282 | { |
0f283ffc RM |
283 | /* First search the entry in the list of loaded files. */ |
284 | struct loaded_l10nfile *ptr = _nl_locale_file_list[locale]; | |
285 | ||
286 | /* Search for the entry. It must be in the list. Otherwise it | |
287 | is a bug and we crash badly. */ | |
f095bb72 | 288 | while ((struct __locale_data *) ptr->data != data) |
0f283ffc RM |
289 | ptr = ptr->next; |
290 | ||
291 | /* Mark the data as not available anymore. So when the data has | |
292 | to be used again it is reloaded. */ | |
293 | ptr->decided = 0; | |
294 | ptr->data = NULL; | |
c84142e8 | 295 | } |
c84142e8 | 296 | |
0f283ffc RM |
297 | /* This does the real work. */ |
298 | _nl_unload_locale (data); | |
c84142e8 UD |
299 | } |
300 | } |