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