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/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <sys/types.h> 43 #include <sys/stat.h> 44 #include <errno.h> 45 #include <limits.h> 46 #include <locale.h> 47 #include <paths.h> /* for _PATH_LOCALE */ 48 #include <stdlib.h> 49 #include <string.h> 50 #include <unistd.h> 51 #include "collate.h" 52 #include "lmonetary.h" /* for __monetary_load_locale() */ 53 #include "lnumeric.h" /* for __numeric_load_locale() */ 54 #include "lmessages.h" /* for __messages_load_locale() */ 55 #include "setlocale.h" 56 #include "ldpart.h" 57 #include "../stdtime/timelocal.h" /* for __time_load_locale() */ 58 59 /* 60 * Category names for getenv() 61 */ 62 static const char categories[_LC_LAST][12] = { 63 "LC_ALL", 64 "LC_COLLATE", 65 "LC_CTYPE", 66 "LC_MONETARY", 67 "LC_NUMERIC", 68 "LC_TIME", 69 "LC_MESSAGES", 70 }; 71 72 /* 73 * Current locales for each category 74 */ 75 static char current_categories[_LC_LAST][ENCODING_LEN + 1] = { 76 "C", 77 "C", 78 "C", 79 "C", 80 "C", 81 "C", 82 "C", 83 }; 84 85 /* 86 * Path to locale storage directory 87 */ 88 char *_PathLocale; 89 90 /* 91 * The locales we are going to try and load 92 */ 93 static char new_categories[_LC_LAST][ENCODING_LEN + 1]; 94 static char saved_categories[_LC_LAST][ENCODING_LEN + 1]; 95 96 static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)]; 97 98 static char *currentlocale(void); 99 static char *loadlocale(int); 100 const char *__get_locale_env(int); 101 102 char * 103 setlocale(int category, 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 if (locale == NULL) 113 return (category != LC_ALL ? 114 current_categories[category] : currentlocale()); 115 116 /* 117 * Default to the current locale for everything. 118 */ 119 for (i = 1; i < _LC_LAST; ++i) 120 (void)strcpy(new_categories[i], current_categories[i]); 121 122 /* 123 * Now go fill up new_categories from the locale argument 124 */ 125 if (!*locale) { 126 if (category == LC_ALL) { 127 for (i = 1; i < _LC_LAST; ++i) { 128 env = __get_locale_env(i); 129 if (strlen(env) > ENCODING_LEN) { 130 errno = EINVAL; 131 return (NULL); 132 } 133 (void)strcpy(new_categories[i], env); 134 } 135 } else { 136 env = __get_locale_env(category); 137 if (strlen(env) > ENCODING_LEN) { 138 errno = EINVAL; 139 return (NULL); 140 } 141 (void)strcpy(new_categories[category], env); 142 } 143 } else if (category != LC_ALL) { 144 if (strlen(locale) > ENCODING_LEN) { 145 errno = EINVAL; 146 return (NULL); 147 } 148 (void)strcpy(new_categories[category], locale); 149 } else { 150 if ((r = strchr(locale, '/')) == NULL) { 151 if (strlen(locale) > ENCODING_LEN) { 152 errno = EINVAL; 153 return (NULL); 154 } 155 for (i = 1; i < _LC_LAST; ++i) 156 (void)strcpy(new_categories[i], locale); 157 } else { 158 for (i = 1; r[1] == '/'; ++r) 159 ; 160 if (!r[1]) { 161 errno = EINVAL; 162 return (NULL); /* Hmm, just slashes... */ 163 } 164 do { 165 if (i == _LC_LAST) 166 break; /* Too many slashes... */ 167 if ((len = r - locale) > ENCODING_LEN) { 168 errno = EINVAL; 169 return (NULL); 170 } 171 (void)strlcpy(new_categories[i], locale, 172 len + 1); 173 i++; 174 while (*r == '/') 175 r++; 176 locale = r; 177 while (*r && *r != '/') 178 r++; 179 } while (*locale); 180 while (i < _LC_LAST) { 181 (void)strcpy(new_categories[i], 182 new_categories[i - 1]); 183 i++; 184 } 185 } 186 } 187 188 if (category != LC_ALL) 189 return (loadlocale(category)); 190 191 for (i = 1; i < _LC_LAST; ++i) { 192 (void)strcpy(saved_categories[i], current_categories[i]); 193 if (loadlocale(i) == NULL) { 194 saverr = errno; 195 for (j = 1; j < i; j++) { 196 (void)strcpy(new_categories[j], 197 saved_categories[j]); 198 if (loadlocale(j) == NULL) { 199 (void)strcpy(new_categories[j], "C"); 200 (void)loadlocale(j); 201 } 202 } 203 errno = saverr; 204 return (NULL); 205 } 206 } 207 return (currentlocale()); 208 } 209 210 static char * 211 currentlocale(void) 212 { 213 int i; 214 215 (void)strcpy(current_locale_string, current_categories[1]); 216 217 for (i = 2; i < _LC_LAST; ++i) 218 if (strcmp(current_categories[1], current_categories[i])) { 219 for (i = 2; i < _LC_LAST; ++i) { 220 (void)strcat(current_locale_string, "/"); 221 (void)strcat(current_locale_string, 222 current_categories[i]); 223 } 224 break; 225 } 226 return (current_locale_string); 227 } 228 229 static char * 230 loadlocale(int category) 231 { 232 char *new = new_categories[category]; 233 char *old = current_categories[category]; 234 int (*func) (const char *); 235 int saved_errno; 236 237 if ((new[0] == '.' && 238 (new[1] == '\0' || (new[1] == '.' && new[2] == '\0'))) || 239 strchr(new, '/') != NULL) { 240 errno = EINVAL; 241 return (NULL); 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