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 * 4. 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 34 #if defined(LIBC_SCCS) && !defined(lint) 35 static char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93"; 36 #endif /* LIBC_SCCS and not lint */ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/types.h> 41 #include <sys/stat.h> 42 #include <errno.h> 43 #include <limits.h> 44 #include <locale.h> 45 #include <paths.h> /* for _PATH_LOCALE */ 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.h> 49 #include "collate.h" 50 #include "lmonetary.h" /* for __monetary_load_locale() */ 51 #include "lnumeric.h" /* for __numeric_load_locale() */ 52 #include "lmessages.h" /* for __messages_load_locale() */ 53 #include "setlocale.h" 54 #include "ldpart.h" 55 #include "../stdtime/timelocal.h" /* for __time_load_locale() */ 56 57 /* 58 * Category names for getenv() 59 */ 60 static const char categories[_LC_LAST][12] = { 61 "LC_ALL", 62 "LC_COLLATE", 63 "LC_CTYPE", 64 "LC_MONETARY", 65 "LC_NUMERIC", 66 "LC_TIME", 67 "LC_MESSAGES", 68 }; 69 70 /* 71 * Current locales for each category 72 */ 73 static char current_categories[_LC_LAST][ENCODING_LEN + 1] = { 74 "C", 75 "C", 76 "C", 77 "C", 78 "C", 79 "C", 80 "C", 81 }; 82 83 /* 84 * Path to locale storage directory 85 */ 86 char *_PathLocale; 87 88 /* 89 * The locales we are going to try and load 90 */ 91 static char new_categories[_LC_LAST][ENCODING_LEN + 1]; 92 static char saved_categories[_LC_LAST][ENCODING_LEN + 1]; 93 94 static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)]; 95 96 static char *currentlocale(void); 97 static char *loadlocale(int); 98 const char *__get_locale_env(int); 99 100 char * 101 setlocale(int category, const char *locale) 102 { 103 int i, j, len, saverr; 104 const char *env, *r; 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 if (strlen(locale) > ENCODING_LEN) { 151 errno = EINVAL; 152 return (NULL); 153 } 154 for (i = 1; i < _LC_LAST; ++i) 155 (void)strcpy(new_categories[i], locale); 156 } else { 157 for (i = 1; r[1] == '/'; ++r) 158 ; 159 if (!r[1]) { 160 errno = EINVAL; 161 return (NULL); /* Hmm, just slashes... */ 162 } 163 do { 164 if (i == _LC_LAST) 165 break; /* Too many slashes... */ 166 if ((len = r - locale) > ENCODING_LEN) { 167 errno = EINVAL; 168 return (NULL); 169 } 170 (void)strlcpy(new_categories[i], locale, 171 len + 1); 172 i++; 173 while (*r == '/') 174 r++; 175 locale = r; 176 while (*r && *r != '/') 177 r++; 178 } while (*locale); 179 while (i < _LC_LAST) { 180 (void)strcpy(new_categories[i], 181 new_categories[i-1]); 182 i++; 183 } 184 } 185 } 186 187 if (category != LC_ALL) 188 return (loadlocale(category)); 189 190 for (i = 1; i < _LC_LAST; ++i) { 191 (void)strcpy(saved_categories[i], current_categories[i]); 192 if (loadlocale(i) == NULL) { 193 saverr = errno; 194 for (j = 1; j < i; j++) { 195 (void)strcpy(new_categories[j], 196 saved_categories[j]); 197 if (loadlocale(j) == NULL) { 198 (void)strcpy(new_categories[j], "C"); 199 (void)loadlocale(j); 200 } 201 } 202 errno = saverr; 203 return (NULL); 204 } 205 } 206 return (currentlocale()); 207 } 208 209 static char * 210 currentlocale(void) 211 { 212 int i; 213 214 (void)strcpy(current_locale_string, current_categories[1]); 215 216 for (i = 2; i < _LC_LAST; ++i) 217 if (strcmp(current_categories[1], current_categories[i])) { 218 for (i = 2; i < _LC_LAST; ++i) { 219 (void)strcat(current_locale_string, "/"); 220 (void)strcat(current_locale_string, 221 current_categories[i]); 222 } 223 break; 224 } 225 return (current_locale_string); 226 } 227 228 static char * 229 loadlocale(int category) 230 { 231 char *new = new_categories[category]; 232 char *old = current_categories[category]; 233 int (*func)(const char *); 234 int saved_errno; 235 236 if ((new[0] == '.' && 237 (new[1] == '\0' || (new[1] == '.' && new[2] == '\0'))) || 238 strchr(new, '/') != NULL) { 239 errno = EINVAL; 240 return (NULL); 241 } 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 * 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 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 } 329 330