1 /*
2 * Copyright (c) 1996 - 2002 FreeBSD Project
3 * Copyright (c) 1991, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Paul Borman at Krystal Technologies.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)setlocale.c 8.1 (Berkeley) 7/4/93
34 * $FreeBSD: head/lib/libc/locale/setlocale.c 228921 2011-12-27 23:28:01Z jilles $
35 */
36
37
38 #include <sys/types.h>
39 #include <sys/stat.h>
40 #include <errno.h>
41 #include <limits.h>
42 #include <locale.h>
43 #include <paths.h> /* for _PATH_LOCALE */
44 #include <stdlib.h>
45 #include <string.h>
46 #include <unistd.h>
47 #include "collate.h"
48 #include "lmonetary.h" /* for __monetary_load_locale() */
49 #include "lnumeric.h" /* for __numeric_load_locale() */
50 #include "lmessages.h" /* for __messages_load_locale() */
51 #include "setlocale.h"
52 #include "ldpart.h"
53 #include "../stdtime/timelocal.h" /* for __time_load_locale() */
54
55 /*
56 * Category names for getenv()
57 */
58 static const char categories[_LC_LAST][12] = {
59 "LC_ALL",
60 "LC_COLLATE",
61 "LC_CTYPE",
62 "LC_MONETARY",
63 "LC_NUMERIC",
64 "LC_TIME",
65 "LC_MESSAGES",
66 };
67
68 /*
69 * Current locales for each category
70 */
71 static char current_categories[_LC_LAST][ENCODING_LEN + 1] = {
72 "C",
73 "C",
74 "C",
75 "C",
76 "C",
77 "C",
78 "C",
79 };
80
81 /*
82 * Path to locale storage directory
83 */
84 char *_PathLocale;
85
86 /*
87 * The locales we are going to try and load
88 */
89 static char new_categories[_LC_LAST][ENCODING_LEN + 1];
90 static char saved_categories[_LC_LAST][ENCODING_LEN + 1];
91
92 static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)];
93
94 static char *currentlocale(void);
95 static char *loadlocale(int);
96 const char *__get_locale_env(int);
97 int __get_locale_str(int category, const char *str, char * const res);
98
99 char *
setlocale(int category,const char * locale)100 setlocale(int category, const char *locale)
101 {
102 int i, j, len, saverr;
103 const char *env, *r;
104 char lres[ENCODING_LEN + 1] = "";
105
106 if (category < LC_ALL || category >= _LC_LAST) {
107 errno = EINVAL;
108 return (NULL);
109 }
110
111 if (locale == NULL)
112 return (category != LC_ALL ?
113 current_categories[category] : currentlocale());
114
115 /*
116 * Default to the current locale for everything.
117 */
118 for (i = 1; i < _LC_LAST; ++i)
119 (void)strcpy(new_categories[i], current_categories[i]);
120
121 /*
122 * Now go fill up new_categories from the locale argument
123 */
124 if (!*locale) {
125 if (category == LC_ALL) {
126 for (i = 1; i < _LC_LAST; ++i) {
127 env = __get_locale_env(i);
128 if (strlen(env) > ENCODING_LEN) {
129 errno = EINVAL;
130 return (NULL);
131 }
132 (void)strcpy(new_categories[i], env);
133 }
134 } else {
135 env = __get_locale_env(category);
136 if (strlen(env) > ENCODING_LEN) {
137 errno = EINVAL;
138 return (NULL);
139 }
140 (void)strcpy(new_categories[category], env);
141 }
142 } else if (category != LC_ALL) {
143 if (strlen(locale) > ENCODING_LEN) {
144 errno = EINVAL;
145 return (NULL);
146 }
147 (void)strcpy(new_categories[category], locale);
148 } else {
149 if ((r = strchr(locale, '/')) != NULL) {
150 for (i = 1; r[1] == '/'; ++r)
151 ;
152 if (!r[1]) {
153 errno = EINVAL;
154 return (NULL); /* Hmm, just slashes... */
155 }
156 do {
157 if (i == _LC_LAST)
158 break; /* Too many slashes... */
159 if ((len = r - locale) > ENCODING_LEN) {
160 errno = EINVAL;
161 return (NULL);
162 }
163 (void)strlcpy(new_categories[i], locale,
164 len + 1);
165 i++;
166 while (*r == '/')
167 r++;
168 locale = r;
169 while (*r && *r != '/')
170 r++;
171 } while (*locale);
172 while (i < _LC_LAST) {
173 (void)strcpy(new_categories[i],
174 new_categories[i - 1]);
175 i++;
176 }
177 } else if ('L' == locale[0] && strchr(locale, ';')) {
178 for (i = 1; i < _LC_LAST; ++i) {
179 __get_locale_str(i, locale, lres);
180 (void)strcpy(new_categories[i], lres);
181 }
182 } else {
183 if (strlen(locale) > ENCODING_LEN) {
184 errno = EINVAL;
185 return (NULL);
186 }
187 for (i = 1; i < _LC_LAST; ++i)
188 (void)strcpy(new_categories[i], locale);
189 }
190 }
191
192 if (category != LC_ALL)
193 return (loadlocale(category));
194
195 for (i = 1; i < _LC_LAST; ++i) {
196 (void)strcpy(saved_categories[i], current_categories[i]);
197 if (loadlocale(i) == NULL) {
198 saverr = errno;
199 for (j = 1; j < i; j++) {
200 (void)strcpy(new_categories[j],
201 saved_categories[j]);
202 if (loadlocale(j) == NULL) {
203 (void)strcpy(new_categories[j], "C");
204 (void)loadlocale(j);
205 }
206 }
207 errno = saverr;
208 return (NULL);
209 }
210 }
211 return (currentlocale());
212 }
213
214 static char *
currentlocale(void)215 currentlocale(void)
216 {
217 int i;
218
219 (void)strcpy(current_locale_string, current_categories[1]);
220
221 for (i = 2; i < _LC_LAST; ++i)
222 if (strcmp(current_categories[1], current_categories[i])) {
223 for (i = 2; i < _LC_LAST; ++i) {
224 (void)strcat(current_locale_string, "/");
225 (void)strcat(current_locale_string,
226 current_categories[i]);
227 }
228 break;
229 }
230 return (current_locale_string);
231 }
232
233 static char *
loadlocale(int category)234 loadlocale(int category)
235 {
236 char *new = new_categories[category];
237 char *old = current_categories[category];
238 int (*func)(const char *);
239 int saved_errno;
240
241 if ((new[0] == '.' &&
242 (new[1] == '\0' || (new[1] == '.' && new[2] == '\0'))) ||
243 strchr(new, '/') != NULL) {
244 errno = EINVAL;
245 return (NULL);
246 }
247
248 saved_errno = errno;
249 errno = __detect_path_locale();
250 if (errno != 0)
251 return (NULL);
252 errno = saved_errno;
253
254 switch (category) {
255 case LC_CTYPE:
256 func = __wrap_setrunelocale;
257 break;
258 case LC_COLLATE:
259 func = __collate_load_tables;
260 break;
261 case LC_TIME:
262 func = __time_load_locale;
263 break;
264 case LC_NUMERIC:
265 func = __numeric_load_locale;
266 break;
267 case LC_MONETARY:
268 func = __monetary_load_locale;
269 break;
270 case LC_MESSAGES:
271 func = __messages_load_locale;
272 break;
273 default:
274 errno = EINVAL;
275 return (NULL);
276 }
277
278 if (strcmp(new, old) == 0)
279 return (old);
280
281 if (func(new) != _LDP_ERROR) {
282 (void)strcpy(old, new);
283 (void)strcpy(__xlocale_global_locale.components[category-1]->locale, new);
284 return (old);
285 }
286
287 return (NULL);
288 }
289
290 static int
getlocstr(const char * name,const char * str,char * const res)291 getlocstr(const char *name, const char *str, char * const res)
292 {
293 const char *np, *cp;
294 int len;
295
296 np = str;
297
298 while ((cp = strchr (np, '=')) != NULL) {
299 if (!strncmp(np, name, (cp - np))) {
300 np = cp + 1;
301 cp = strchr(cp, ';');
302 if (cp == NULL)
303 cp = str + strlen(str);
304 len = cp - np;
305 if (len > ENCODING_LEN)
306 len = ENCODING_LEN;
307 strncpy(res, np, len);
308 res[len] = '\0';
309 return 0;
310 } else {
311 cp = strchr(cp, ';');
312 if (cp != NULL)
313 np = cp + 1;
314 else
315 break;
316 }
317 }
318
319 return 1;
320 }
321 /*
322 * Similar function like __get_locale_env() but from a string.
323 */
324 int
__get_locale_str(int category,const char * str,char * const res)325 __get_locale_str(int category, const char *str, char * const res)
326 {
327 int check;
328
329 /* 1. check LC_ALL. */
330 check = getlocstr(categories[0], str, res);
331
332 /* 2. check LC_* */
333 if (check)
334 check = getlocstr(categories[category], str, res);
335
336 /* 3. check LANG */
337 if (check)
338 check = getlocstr("LANG", str, res);
339
340 /* 4. if none is set, fall to "C" */
341 if (check) {
342 res[0] = 'C';
343 res[1] = '\0';
344 }
345
346 return check;
347 }
348
349
350 const char *
__get_locale_env(int category)351 __get_locale_env(int category)
352 {
353 const char *env;
354
355 /* 1. check LC_ALL. */
356 env = getenv(categories[0]);
357
358 /* 2. check LC_* */
359 if (env == NULL || !*env)
360 env = getenv(categories[category]);
361
362 /* 3. check LANG */
363 if (env == NULL || !*env)
364 env = getenv("LANG");
365
366 /* 4. if none is set, fall to "C" */
367 if (env == NULL || !*env)
368 env = "C";
369
370 return (env);
371 }
372
373 /*
374 * Detect locale storage location and store its value to _PathLocale variable
375 */
376 int
__detect_path_locale(void)377 __detect_path_locale(void)
378 {
379 if (_PathLocale == NULL) {
380 char *p = getenv("PATH_LOCALE");
381
382 if (p != NULL && !issetugid()) {
383 if (strlen(p) + 1/*"/"*/ + ENCODING_LEN +
384 1/*"/"*/ + CATEGORY_LEN >= PATH_MAX)
385 return (ENAMETOOLONG);
386 _PathLocale = strdup(p);
387 if (_PathLocale == NULL)
388 return (errno == 0 ? ENOMEM : errno);
389 } else
390 _PathLocale = _PATH_LOCALE;
391 }
392 return (0);
393 }
394