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 98 char * 99 setlocale(int category, const char *locale) 100 { 101 int i, j, len, saverr; 102 const char *env, *r; 103 104 if (category < LC_ALL || category >= _LC_LAST) { 105 errno = EINVAL; 106 return (NULL); 107 } 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 * 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 * 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 } 240 241 saved_errno = errno; 242 errno = __detect_path_locale(); 243 if (errno != 0) 244 return (NULL); 245 errno = saved_errno; 246 247 switch (category) { 248 case LC_CTYPE: 249 func = __wrap_setrunelocale; 250 break; 251 case LC_COLLATE: 252 func = __collate_load_tables; 253 break; 254 case LC_TIME: 255 func = __time_load_locale; 256 break; 257 case LC_NUMERIC: 258 func = __numeric_load_locale; 259 break; 260 case LC_MONETARY: 261 func = __monetary_load_locale; 262 break; 263 case LC_MESSAGES: 264 func = __messages_load_locale; 265 break; 266 default: 267 errno = EINVAL; 268 return (NULL); 269 } 270 271 if (strcmp(new, old) == 0) 272 return (old); 273 274 if (func(new) != _LDP_ERROR) { 275 (void)strcpy(old, new); 276 (void)strcpy(__xlocale_global_locale.components[category-1]->locale, new); 277 return (old); 278 } 279 280 return (NULL); 281 } 282 283 const char * 284 __get_locale_env(int category) 285 { 286 const char *env; 287 288 /* 1. check LC_ALL. */ 289 env = getenv(categories[0]); 290 291 /* 2. check LC_* */ 292 if (env == NULL || !*env) 293 env = getenv(categories[category]); 294 295 /* 3. check LANG */ 296 if (env == NULL || !*env) 297 env = getenv("LANG"); 298 299 /* 4. if none is set, fall to "C" */ 300 if (env == NULL || !*env) 301 env = "C"; 302 303 return (env); 304 } 305 306 /* 307 * Detect locale storage location and store its value to _PathLocale variable 308 */ 309 int 310 __detect_path_locale(void) 311 { 312 if (_PathLocale == NULL) { 313 char *p = getenv("PATH_LOCALE"); 314 315 if (p != NULL && !issetugid()) { 316 if (strlen(p) + 1/*"/"*/ + ENCODING_LEN + 317 1/*"/"*/ + CATEGORY_LEN >= PATH_MAX) 318 return (ENAMETOOLONG); 319 _PathLocale = strdup(p); 320 if (_PathLocale == NULL) 321 return (errno == 0 ? ENOMEM : errno); 322 } else 323 _PathLocale = _PATH_LOCALE; 324 } 325 return (0); 326 } 327