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 char *categories[_LC_LAST] = { 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 static const char *__get_locale_env(int); 99 100 char * 101 setlocale(category, locale) 102 int category; 103 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 } 112 113 if (locale == NULL) 114 return (category != LC_ALL ? 115 current_categories[category] : currentlocale()); 116 117 /* 118 * Default to the current locale for everything. 119 */ 120 for (i = 1; i < _LC_LAST; ++i) 121 (void)strcpy(new_categories[i], current_categories[i]); 122 123 /* 124 * Now go fill up new_categories from the locale argument 125 */ 126 if (!*locale) { 127 if (category == LC_ALL) { 128 for (i = 1; i < _LC_LAST; ++i) { 129 env = __get_locale_env(i); 130 if (strlen(env) > ENCODING_LEN) { 131 errno = EINVAL; 132 return (NULL); 133 } 134 (void)strcpy(new_categories[i], env); 135 } 136 } else { 137 env = __get_locale_env(category); 138 if (strlen(env) > ENCODING_LEN) { 139 errno = EINVAL; 140 return (NULL); 141 } 142 (void)strcpy(new_categories[category], env); 143 } 144 } else if (category != LC_ALL) { 145 if (strlen(locale) > ENCODING_LEN) { 146 errno = EINVAL; 147 return (NULL); 148 } 149 (void)strcpy(new_categories[category], locale); 150 } else { 151 if ((r = strchr(locale, '/')) == NULL) { 152 if (strlen(locale) > ENCODING_LEN) { 153 errno = EINVAL; 154 return (NULL); 155 } 156 for (i = 1; i < _LC_LAST; ++i) 157 (void)strcpy(new_categories[i], locale); 158 } else { 159 for (i = 1; r[1] == '/'; ++r) 160 ; 161 if (!r[1]) { 162 errno = EINVAL; 163 return (NULL); /* Hmm, just slashes... */ 164 } 165 do { 166 if (i == _LC_LAST) 167 break; /* Too many slashes... */ 168 if ((len = r - locale) > ENCODING_LEN) { 169 errno = EINVAL; 170 return (NULL); 171 } 172 (void)strlcpy(new_categories[i], locale, 173 len + 1); 174 i++; 175 while (*r == '/') 176 r++; 177 locale = r; 178 while (*r && *r != '/') 179 r++; 180 } while (*locale); 181 while (i < _LC_LAST) { 182 (void)strcpy(new_categories[i], 183 new_categories[i-1]); 184 i++; 185 } 186 } 187 } 188 189 if (category != LC_ALL) 190 return (loadlocale(category)); 191 192 for (i = 1; i < _LC_LAST; ++i) { 193 (void)strcpy(saved_categories[i], current_categories[i]); 194 if (loadlocale(i) == NULL) { 195 saverr = errno; 196 for (j = 1; j < i; j++) { 197 (void)strcpy(new_categories[j], 198 saved_categories[j]); 199 if (loadlocale(j) == NULL) { 200 (void)strcpy(new_categories[j], "C"); 201 (void)loadlocale(j); 202 } 203 } 204 errno = saverr; 205 return (NULL); 206 } 207 } 208 return (currentlocale()); 209 } 210 211 static char * 212 currentlocale() 213 { 214 int i; 215 216 (void)strcpy(current_locale_string, current_categories[1]); 217 218 for (i = 2; i < _LC_LAST; ++i) 219 if (strcmp(current_categories[1], current_categories[i])) { 220 for (i = 2; i < _LC_LAST; ++i) { 221 (void)strcat(current_locale_string, "/"); 222 (void)strcat(current_locale_string, 223 current_categories[i]); 224 } 225 break; 226 } 227 return (current_locale_string); 228 } 229 230 static char * 231 loadlocale(category) 232 int category; 233 { 234 char *new = new_categories[category]; 235 char *old = current_categories[category]; 236 int (*func)(const char *); 237 int saved_errno; 238 239 if ((new[0] == '.' && 240 (new[1] == '\0' || (new[1] == '.' && new[2] == '\0'))) || 241 strchr(new, '/') != NULL) { 242 errno = EINVAL; 243 return (NULL); 244 } 245 246 saved_errno = errno; 247 errno = __detect_path_locale(); 248 if (errno != 0) 249 return (NULL); 250 errno = saved_errno; 251 252 switch (category) { 253 case LC_CTYPE: 254 func = __wrap_setrunelocale; 255 break; 256 case LC_COLLATE: 257 func = __collate_load_tables; 258 break; 259 case LC_TIME: 260 func = __time_load_locale; 261 break; 262 case LC_NUMERIC: 263 func = __numeric_load_locale; 264 break; 265 case LC_MONETARY: 266 func = __monetary_load_locale; 267 break; 268 case LC_MESSAGES: 269 func = __messages_load_locale; 270 break; 271 default: 272 errno = EINVAL; 273 return (NULL); 274 } 275 276 if (strcmp(new, old) == 0) 277 return (old); 278 279 if (func(new) != _LDP_ERROR) { 280 (void)strcpy(old, new); 281 return (old); 282 } 283 284 return (NULL); 285 } 286 287 static const char * 288 __get_locale_env(category) 289 int category; 290 { 291 const char *env; 292 293 /* 1. check LC_ALL. */ 294 env = getenv(categories[0]); 295 296 /* 2. check LC_* */ 297 if (env == NULL || !*env) 298 env = getenv(categories[category]); 299 300 /* 3. check LANG */ 301 if (env == NULL || !*env) 302 env = getenv("LANG"); 303 304 /* 4. if none is set, fall to "C" */ 305 if (env == NULL || !*env) 306 env = "C"; 307 308 return (env); 309 } 310 311 /* 312 * Detect locale storage location and store its value to _PathLocale variable 313 */ 314 int 315 __detect_path_locale(void) 316 { 317 if (_PathLocale == NULL) { 318 char *p = getenv("PATH_LOCALE"); 319 320 if (p != NULL && !issetugid()) { 321 if (strlen(p) + 1/*"/"*/ + ENCODING_LEN + 322 1/*"/"*/ + CATEGORY_LEN >= PATH_MAX) 323 return (ENAMETOOLONG); 324 _PathLocale = strdup(p); 325 if (_PathLocale == NULL) 326 return (errno == 0 ? ENOMEM : errno); 327 } else 328 _PathLocale = _PATH_LOCALE; 329 } 330 return (0); 331 } 332 333