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 #include <sys/types.h> 37 #include <sys/stat.h> 38 #include <errno.h> 39 #include <limits.h> 40 #include <locale.h> 41 #include <paths.h> /* for _PATH_LOCALE */ 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 #include "collate.h" 46 #include "lmonetary.h" /* for __monetary_load_locale() */ 47 #include "lnumeric.h" /* for __numeric_load_locale() */ 48 #include "lmessages.h" /* for __messages_load_locale() */ 49 #include "setlocale.h" 50 #include "ldpart.h" 51 #include "../stdtime/timelocal.h" /* for __time_load_locale() */ 52 53 /* 54 * Category names for getenv() 55 */ 56 static const char categories[_LC_LAST][12] = { 57 "LC_ALL", 58 "LC_COLLATE", 59 "LC_CTYPE", 60 "LC_MONETARY", 61 "LC_NUMERIC", 62 "LC_TIME", 63 "LC_MESSAGES", 64 }; 65 66 /* 67 * Current locales for each category 68 */ 69 static char current_categories[_LC_LAST][ENCODING_LEN + 1] = { 70 "C", 71 "C", 72 "C", 73 "C", 74 "C", 75 "C", 76 "C", 77 }; 78 79 /* 80 * Path to locale storage directory 81 */ 82 char *_PathLocale; 83 84 /* 85 * The locales we are going to try and load 86 */ 87 static char new_categories[_LC_LAST][ENCODING_LEN + 1]; 88 static char saved_categories[_LC_LAST][ENCODING_LEN + 1]; 89 90 static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)]; 91 92 static char *currentlocale(void); 93 static char *loadlocale(int); 94 const char *__get_locale_env(int); 95 96 char * 97 setlocale(int category, const char *locale) 98 { 99 int i, j, len, saverr; 100 const char *env, *r; 101 102 if (category < LC_ALL || category >= _LC_LAST) { 103 errno = EINVAL; 104 return (NULL); 105 } 106 if (locale == NULL) 107 return (category != LC_ALL ? 108 current_categories[category] : currentlocale()); 109 110 /* 111 * Default to the current locale for everything. 112 */ 113 for (i = 1; i < _LC_LAST; ++i) 114 (void)strcpy(new_categories[i], current_categories[i]); 115 116 /* 117 * Now go fill up new_categories from the locale argument 118 */ 119 if (!*locale) { 120 if (category == LC_ALL) { 121 for (i = 1; i < _LC_LAST; ++i) { 122 env = __get_locale_env(i); 123 if (strlen(env) > ENCODING_LEN) { 124 errno = EINVAL; 125 return (NULL); 126 } 127 (void)strcpy(new_categories[i], env); 128 } 129 } else { 130 env = __get_locale_env(category); 131 if (strlen(env) > ENCODING_LEN) { 132 errno = EINVAL; 133 return (NULL); 134 } 135 (void)strcpy(new_categories[category], env); 136 } 137 } else if (category != LC_ALL) { 138 if (strlen(locale) > ENCODING_LEN) { 139 errno = EINVAL; 140 return (NULL); 141 } 142 (void)strcpy(new_categories[category], locale); 143 } else { 144 if ((r = strchr(locale, '/')) == NULL) { 145 if (strlen(locale) > ENCODING_LEN) { 146 errno = EINVAL; 147 return (NULL); 148 } 149 for (i = 1; i < _LC_LAST; ++i) 150 (void)strcpy(new_categories[i], locale); 151 } else { 152 for (i = 1; r[1] == '/'; ++r) 153 ; 154 if (!r[1]) { 155 errno = EINVAL; 156 return (NULL); /* Hmm, just slashes... */ 157 } 158 do { 159 if (i == _LC_LAST) 160 break; /* Too many slashes... */ 161 if ((len = r - locale) > ENCODING_LEN) { 162 errno = EINVAL; 163 return (NULL); 164 } 165 (void)strlcpy(new_categories[i], locale, 166 len + 1); 167 i++; 168 while (*r == '/') 169 r++; 170 locale = r; 171 while (*r && *r != '/') 172 r++; 173 } while (*locale); 174 while (i < _LC_LAST) { 175 (void)strcpy(new_categories[i], 176 new_categories[i - 1]); 177 i++; 178 } 179 } 180 } 181 182 if (category != LC_ALL) 183 return (loadlocale(category)); 184 185 for (i = 1; i < _LC_LAST; ++i) { 186 (void)strcpy(saved_categories[i], current_categories[i]); 187 if (loadlocale(i) == NULL) { 188 saverr = errno; 189 for (j = 1; j < i; j++) { 190 (void)strcpy(new_categories[j], 191 saved_categories[j]); 192 if (loadlocale(j) == NULL) { 193 (void)strcpy(new_categories[j], "C"); 194 (void)loadlocale(j); 195 } 196 } 197 errno = saverr; 198 return (NULL); 199 } 200 } 201 return (currentlocale()); 202 } 203 204 static char * 205 currentlocale(void) 206 { 207 int i; 208 209 (void)strcpy(current_locale_string, current_categories[1]); 210 211 for (i = 2; i < _LC_LAST; ++i) 212 if (strcmp(current_categories[1], current_categories[i])) { 213 for (i = 2; i < _LC_LAST; ++i) { 214 (void)strcat(current_locale_string, "/"); 215 (void)strcat(current_locale_string, 216 current_categories[i]); 217 } 218 break; 219 } 220 return (current_locale_string); 221 } 222 223 static char * 224 loadlocale(int category) 225 { 226 char *new = new_categories[category]; 227 char *old = current_categories[category]; 228 int (*func) (const char *); 229 int saved_errno; 230 231 if ((new[0] == '.' && 232 (new[1] == '\0' || (new[1] == '.' && new[2] == '\0'))) || 233 strchr(new, '/') != NULL) { 234 errno = EINVAL; 235 return (NULL); 236 } 237 saved_errno = errno; 238 errno = __detect_path_locale(); 239 if (errno != 0) 240 return (NULL); 241 errno = saved_errno; 242 243 switch (category) { 244 case LC_CTYPE: 245 func = __wrap_setrunelocale; 246 break; 247 case LC_COLLATE: 248 func = __collate_load_tables; 249 break; 250 case LC_TIME: 251 func = __time_load_locale; 252 break; 253 case LC_NUMERIC: 254 func = __numeric_load_locale; 255 break; 256 case LC_MONETARY: 257 func = __monetary_load_locale; 258 break; 259 case LC_MESSAGES: 260 func = __messages_load_locale; 261 break; 262 default: 263 errno = EINVAL; 264 return (NULL); 265 } 266 267 if (strcmp(new, old) == 0) 268 return (old); 269 270 if (func(new) != _LDP_ERROR) { 271 (void)strcpy(old, new); 272 (void)strcpy(__xlocale_global_locale.components[category-1]->locale, new); 273 return (old); 274 } 275 276 return (NULL); 277 } 278 279 const char * 280 __get_locale_env(int category) 281 { 282 const char *env; 283 284 /* 1. check LC_ALL. */ 285 env = getenv(categories[0]); 286 287 /* 2. check LC_* */ 288 if (env == NULL || !*env) 289 env = getenv(categories[category]); 290 291 /* 3. check LANG */ 292 if (env == NULL || !*env) 293 env = getenv("LANG"); 294 295 /* 4. if none is set, fall to "C" */ 296 if (env == NULL || !*env) 297 env = "C"; 298 299 return (env); 300 } 301 302 /* 303 * Detect locale storage location and store its value to _PathLocale variable 304 */ 305 int 306 __detect_path_locale(void) 307 { 308 if (_PathLocale == NULL) { 309 char *p = secure_getenv("PATH_LOCALE"); 310 311 if (p != NULL) { 312 if (strlen(p) + 1/*"/"*/ + ENCODING_LEN + 313 1/*"/"*/ + CATEGORY_LEN >= PATH_MAX) 314 return (ENAMETOOLONG); 315 _PathLocale = strdup(p); 316 if (_PathLocale == NULL) 317 return (errno == 0 ? ENOMEM : errno); 318 } else 319 _PathLocale = _PATH_LOCALE; 320 } 321 return (0); 322 } 323