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/types.h>
40 #include <sys/stat.h>
41 #include <errno.h>
42 #include <limits.h>
43 #include <locale.h>
44 #include <paths.h> /* for _PATH_LOCALE */
45 #include <stdlib.h>
46 #include <string.h>
47 #include <unistd.h>
48 #include "collate.h"
49 #include "lmonetary.h" /* for __monetary_load_locale() */
50 #include "lnumeric.h" /* for __numeric_load_locale() */
51 #include "lmessages.h" /* for __messages_load_locale() */
52 #include "setlocale.h"
53 #include "ldpart.h"
54 #include "../stdtime/timelocal.h" /* for __time_load_locale() */
55
56 /*
57 * Category names for getenv()
58 */
59 static const char categories[_LC_LAST][12] = {
60 "LC_ALL",
61 "LC_COLLATE",
62 "LC_CTYPE",
63 "LC_MONETARY",
64 "LC_NUMERIC",
65 "LC_TIME",
66 "LC_MESSAGES",
67 };
68
69 /*
70 * Current locales for each category
71 */
72 static char current_categories[_LC_LAST][ENCODING_LEN + 1] = {
73 "C",
74 "C",
75 "C",
76 "C",
77 "C",
78 "C",
79 "C",
80 };
81
82 /*
83 * Path to locale storage directory
84 */
85 char *_PathLocale;
86
87 /*
88 * The locales we are going to try and load
89 */
90 static char new_categories[_LC_LAST][ENCODING_LEN + 1];
91 static char saved_categories[_LC_LAST][ENCODING_LEN + 1];
92
93 static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)];
94
95 static char *currentlocale(void);
96 static char *loadlocale(int);
97 const char *__get_locale_env(int);
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
105 if (category < LC_ALL || category >= _LC_LAST) {
106 errno = EINVAL;
107 return (NULL);
108 }
109 if (locale == NULL)
110 return (category != LC_ALL ?
111 current_categories[category] : currentlocale());
112
113 /*
114 * Default to the current locale for everything.
115 */
116 for (i = 1; i < _LC_LAST; ++i)
117 (void)strcpy(new_categories[i], current_categories[i]);
118
119 /*
120 * Now go fill up new_categories from the locale argument
121 */
122 if (!*locale) {
123 if (category == LC_ALL) {
124 for (i = 1; i < _LC_LAST; ++i) {
125 env = __get_locale_env(i);
126 if (strlen(env) > ENCODING_LEN) {
127 errno = EINVAL;
128 return (NULL);
129 }
130 (void)strcpy(new_categories[i], env);
131 }
132 } else {
133 env = __get_locale_env(category);
134 if (strlen(env) > ENCODING_LEN) {
135 errno = EINVAL;
136 return (NULL);
137 }
138 (void)strcpy(new_categories[category], env);
139 }
140 } else if (category != LC_ALL) {
141 if (strlen(locale) > ENCODING_LEN) {
142 errno = EINVAL;
143 return (NULL);
144 }
145 (void)strcpy(new_categories[category], locale);
146 } else {
147 if ((r = strchr(locale, '/')) == NULL) {
148 if (strlen(locale) > ENCODING_LEN) {
149 errno = EINVAL;
150 return (NULL);
151 }
152 for (i = 1; i < _LC_LAST; ++i)
153 (void)strcpy(new_categories[i], locale);
154 } else {
155 for (i = 1; r[1] == '/'; ++r)
156 ;
157 if (!r[1]) {
158 errno = EINVAL;
159 return (NULL); /* Hmm, just slashes... */
160 }
161 do {
162 if (i == _LC_LAST)
163 break; /* Too many slashes... */
164 if ((len = r - locale) > ENCODING_LEN) {
165 errno = EINVAL;
166 return (NULL);
167 }
168 (void)strlcpy(new_categories[i], locale,
169 len + 1);
170 i++;
171 while (*r == '/')
172 r++;
173 locale = r;
174 while (*r && *r != '/')
175 r++;
176 } while (*locale);
177 while (i < _LC_LAST) {
178 (void)strcpy(new_categories[i],
179 new_categories[i - 1]);
180 i++;
181 }
182 }
183 }
184
185 if (category != LC_ALL)
186 return (loadlocale(category));
187
188 for (i = 1; i < _LC_LAST; ++i) {
189 (void)strcpy(saved_categories[i], current_categories[i]);
190 if (loadlocale(i) == NULL) {
191 saverr = errno;
192 for (j = 1; j < i; j++) {
193 (void)strcpy(new_categories[j],
194 saved_categories[j]);
195 if (loadlocale(j) == NULL) {
196 (void)strcpy(new_categories[j], "C");
197 (void)loadlocale(j);
198 }
199 }
200 errno = saverr;
201 return (NULL);
202 }
203 }
204 return (currentlocale());
205 }
206
207 static char *
currentlocale(void)208 currentlocale(void)
209 {
210 int i;
211
212 (void)strcpy(current_locale_string, current_categories[1]);
213
214 for (i = 2; i < _LC_LAST; ++i)
215 if (strcmp(current_categories[1], current_categories[i])) {
216 for (i = 2; i < _LC_LAST; ++i) {
217 (void)strcat(current_locale_string, "/");
218 (void)strcat(current_locale_string,
219 current_categories[i]);
220 }
221 break;
222 }
223 return (current_locale_string);
224 }
225
226 static char *
loadlocale(int category)227 loadlocale(int category)
228 {
229 char *new = new_categories[category];
230 char *old = current_categories[category];
231 int (*func) (const char *);
232 int saved_errno;
233
234 if ((new[0] == '.' &&
235 (new[1] == '\0' || (new[1] == '.' && new[2] == '\0'))) ||
236 strchr(new, '/') != NULL) {
237 errno = EINVAL;
238 return (NULL);
239 }
240 saved_errno = errno;
241 errno = __detect_path_locale();
242 if (errno != 0)
243 return (NULL);
244 errno = saved_errno;
245
246 switch (category) {
247 case LC_CTYPE:
248 func = __wrap_setrunelocale;
249 break;
250 case LC_COLLATE:
251 func = __collate_load_tables;
252 break;
253 case LC_TIME:
254 func = __time_load_locale;
255 break;
256 case LC_NUMERIC:
257 func = __numeric_load_locale;
258 break;
259 case LC_MONETARY:
260 func = __monetary_load_locale;
261 break;
262 case LC_MESSAGES:
263 func = __messages_load_locale;
264 break;
265 default:
266 errno = EINVAL;
267 return (NULL);
268 }
269
270 if (strcmp(new, old) == 0)
271 return (old);
272
273 if (func(new) != _LDP_ERROR) {
274 (void)strcpy(old, new);
275 (void)strcpy(__xlocale_global_locale.components[category-1]->locale, new);
276 return (old);
277 }
278
279 return (NULL);
280 }
281
282 const char *
__get_locale_env(int category)283 __get_locale_env(int category)
284 {
285 const char *env;
286
287 /* 1. check LC_ALL. */
288 env = getenv(categories[0]);
289
290 /* 2. check LC_* */
291 if (env == NULL || !*env)
292 env = getenv(categories[category]);
293
294 /* 3. check LANG */
295 if (env == NULL || !*env)
296 env = getenv("LANG");
297
298 /* 4. if none is set, fall to "C" */
299 if (env == NULL || !*env)
300 env = "C";
301
302 return (env);
303 }
304
305 /*
306 * Detect locale storage location and store its value to _PathLocale variable
307 */
308 int
__detect_path_locale(void)309 __detect_path_locale(void)
310 {
311 if (_PathLocale == NULL) {
312 char *p = secure_getenv("PATH_LOCALE");
313
314 if (p != NULL) {
315 if (strlen(p) + 1/*"/"*/ + ENCODING_LEN +
316 1/*"/"*/ + CATEGORY_LEN >= PATH_MAX)
317 return (ENAMETOOLONG);
318 _PathLocale = strdup(p);
319 if (_PathLocale == NULL)
320 return (errno == 0 ? ENOMEM : errno);
321 } else
322 _PathLocale = _PATH_LOCALE;
323 }
324 return (0);
325 }
326