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. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 #if defined(LIBC_SCCS) && !defined(lint) 39 static char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93"; 40 #endif /* LIBC_SCCS and not lint */ 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 43 44 #include <sys/types.h> 45 #include <sys/stat.h> 46 #include <errno.h> 47 #include <limits.h> 48 #include <locale.h> 49 #include <paths.h> /* for _PATH_LOCALE */ 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 #include "collate.h" 54 #include "lmonetary.h" /* for __monetary_load_locale() */ 55 #include "lnumeric.h" /* for __numeric_load_locale() */ 56 #include "lmessages.h" /* for __messages_load_locale() */ 57 #include "setlocale.h" 58 #include "ldpart.h" 59 #include "../stdtime/timelocal.h" /* for __time_load_locale() */ 60 61 /* 62 * Category names for getenv() 63 */ 64 static char *categories[_LC_LAST] = { 65 "LC_ALL", 66 "LC_COLLATE", 67 "LC_CTYPE", 68 "LC_MONETARY", 69 "LC_NUMERIC", 70 "LC_TIME", 71 "LC_MESSAGES", 72 }; 73 74 /* 75 * Current locales for each category 76 */ 77 static char current_categories[_LC_LAST][ENCODING_LEN + 1] = { 78 "C", 79 "C", 80 "C", 81 "C", 82 "C", 83 "C", 84 "C", 85 }; 86 87 /* 88 * Path to locale storage directory 89 */ 90 char *_PathLocale; 91 92 /* 93 * The locales we are going to try and load 94 */ 95 static char new_categories[_LC_LAST][ENCODING_LEN + 1]; 96 static char saved_categories[_LC_LAST][ENCODING_LEN + 1]; 97 98 static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)]; 99 100 static char *currentlocale(void); 101 static char *loadlocale(int); 102 static const char *__get_locale_env(int); 103 104 char * 105 setlocale(category, locale) 106 int category; 107 const char *locale; 108 { 109 int i, j, len, saverr; 110 const char *env, *r; 111 112 if (category < LC_ALL || category >= _LC_LAST) { 113 errno = EINVAL; 114 return (NULL); 115 } 116 117 if (locale == NULL) 118 return (category != LC_ALL ? 119 current_categories[category] : currentlocale()); 120 121 /* 122 * Default to the current locale for everything. 123 */ 124 for (i = 1; i < _LC_LAST; ++i) 125 (void)strcpy(new_categories[i], current_categories[i]); 126 127 /* 128 * Now go fill up new_categories from the locale argument 129 */ 130 if (!*locale) { 131 if (category == LC_ALL) { 132 for (i = 1; i < _LC_LAST; ++i) { 133 env = __get_locale_env(i); 134 if (strlen(env) > ENCODING_LEN) { 135 errno = EINVAL; 136 return (NULL); 137 } 138 (void)strcpy(new_categories[i], env); 139 } 140 } else { 141 env = __get_locale_env(category); 142 if (strlen(env) > ENCODING_LEN) { 143 errno = EINVAL; 144 return (NULL); 145 } 146 (void)strcpy(new_categories[category], env); 147 } 148 } else if (category != LC_ALL) { 149 if (strlen(locale) > ENCODING_LEN) { 150 errno = EINVAL; 151 return (NULL); 152 } 153 (void)strcpy(new_categories[category], locale); 154 } else { 155 if ((r = strchr(locale, '/')) == NULL) { 156 if (strlen(locale) > ENCODING_LEN) { 157 errno = EINVAL; 158 return (NULL); 159 } 160 for (i = 1; i < _LC_LAST; ++i) 161 (void)strcpy(new_categories[i], locale); 162 } else { 163 for (i = 1; r[1] == '/'; ++r) 164 ; 165 if (!r[1]) { 166 errno = EINVAL; 167 return (NULL); /* Hmm, just slashes... */ 168 } 169 do { 170 if (i == _LC_LAST) 171 break; /* Too many slashes... */ 172 if ((len = r - locale) > ENCODING_LEN) { 173 errno = EINVAL; 174 return (NULL); 175 } 176 (void)strlcpy(new_categories[i], locale, 177 len + 1); 178 i++; 179 while (*r == '/') 180 r++; 181 locale = r; 182 while (*r && *r != '/') 183 r++; 184 } while (*locale); 185 while (i < _LC_LAST) { 186 (void)strcpy(new_categories[i], 187 new_categories[i-1]); 188 i++; 189 } 190 } 191 } 192 193 if (category != LC_ALL) 194 return (loadlocale(category)); 195 196 for (i = 1; i < _LC_LAST; ++i) { 197 (void)strcpy(saved_categories[i], current_categories[i]); 198 if (loadlocale(i) == NULL) { 199 saverr = errno; 200 for (j = 1; j < i; j++) { 201 (void)strcpy(new_categories[j], 202 saved_categories[j]); 203 if (loadlocale(j) == NULL) { 204 (void)strcpy(new_categories[j], "C"); 205 (void)loadlocale(j); 206 } 207 } 208 errno = saverr; 209 return (NULL); 210 } 211 } 212 return (currentlocale()); 213 } 214 215 static char * 216 currentlocale() 217 { 218 int i; 219 220 (void)strcpy(current_locale_string, current_categories[1]); 221 222 for (i = 2; i < _LC_LAST; ++i) 223 if (strcmp(current_categories[1], current_categories[i])) { 224 for (i = 2; i < _LC_LAST; ++i) { 225 (void)strcat(current_locale_string, "/"); 226 (void)strcat(current_locale_string, 227 current_categories[i]); 228 } 229 break; 230 } 231 return (current_locale_string); 232 } 233 234 static char * 235 loadlocale(category) 236 int category; 237 { 238 char *new = new_categories[category]; 239 char *old = current_categories[category]; 240 int (*func)(const char *); 241 int saved_errno; 242 243 if ((new[0] == '.' && 244 (new[1] == '\0' || (new[1] == '.' && new[2] == '\0'))) || 245 strchr(new, '/') != NULL) { 246 errno = EINVAL; 247 return (NULL); 248 } 249 250 saved_errno = errno; 251 errno = __detect_path_locale(); 252 if (errno != 0) 253 return (NULL); 254 errno = saved_errno; 255 256 switch (category) { 257 case LC_CTYPE: 258 func = __wrap_setrunelocale; 259 break; 260 case LC_COLLATE: 261 func = __collate_load_tables; 262 break; 263 case LC_TIME: 264 func = __time_load_locale; 265 break; 266 case LC_NUMERIC: 267 func = __numeric_load_locale; 268 break; 269 case LC_MONETARY: 270 func = __monetary_load_locale; 271 break; 272 case LC_MESSAGES: 273 func = __messages_load_locale; 274 break; 275 default: 276 errno = EINVAL; 277 return (NULL); 278 } 279 280 if (strcmp(new, old) == 0) 281 return (old); 282 283 if (func(new) != _LDP_ERROR) { 284 (void)strcpy(old, new); 285 return (old); 286 } 287 288 return (NULL); 289 } 290 291 static const char * 292 __get_locale_env(category) 293 int category; 294 { 295 const char *env; 296 297 /* 1. check LC_ALL. */ 298 env = getenv(categories[0]); 299 300 /* 2. check LC_* */ 301 if (env == NULL || !*env) 302 env = getenv(categories[category]); 303 304 /* 3. check LANG */ 305 if (env == NULL || !*env) 306 env = getenv("LANG"); 307 308 /* 4. if none is set, fall to "C" */ 309 if (env == NULL || !*env) 310 env = "C"; 311 312 return (env); 313 } 314 315 /* 316 * Detect locale storage location and store its value to _PathLocale variable 317 */ 318 int 319 __detect_path_locale(void) 320 { 321 if (_PathLocale == NULL) { 322 char *p = getenv("PATH_LOCALE"); 323 324 if (p != NULL && !issetugid()) { 325 if (strlen(p) + 1/*"/"*/ + ENCODING_LEN + 326 1/*"/"*/ + CATEGORY_LEN >= PATH_MAX) 327 return (ENAMETOOLONG); 328 _PathLocale = strdup(p); 329 if (_PathLocale == NULL) 330 return (errno == 0 ? ENOMEM : errno); 331 } else 332 _PathLocale = _PATH_LOCALE; 333 } 334 return (0); 335 } 336 337