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 #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 if (locale == NULL) 111 return (category != LC_ALL ? 112 current_categories[category] : currentlocale()); 113 114 /* 115 * Default to the current locale for everything. 116 */ 117 for (i = 1; i < _LC_LAST; ++i) 118 (void)strcpy(new_categories[i], current_categories[i]); 119 120 /* 121 * Now go fill up new_categories from the locale argument 122 */ 123 if (!*locale) { 124 if (category == LC_ALL) { 125 for (i = 1; i < _LC_LAST; ++i) { 126 env = __get_locale_env(i); 127 if (strlen(env) > ENCODING_LEN) { 128 errno = EINVAL; 129 return (NULL); 130 } 131 (void)strcpy(new_categories[i], env); 132 } 133 } else { 134 env = __get_locale_env(category); 135 if (strlen(env) > ENCODING_LEN) { 136 errno = EINVAL; 137 return (NULL); 138 } 139 (void)strcpy(new_categories[category], env); 140 } 141 } else if (category != LC_ALL) { 142 if (strlen(locale) > ENCODING_LEN) { 143 errno = EINVAL; 144 return (NULL); 145 } 146 (void)strcpy(new_categories[category], locale); 147 } else { 148 if ((r = strchr(locale, '/')) == NULL) { 149 if (strlen(locale) > ENCODING_LEN) { 150 errno = EINVAL; 151 return (NULL); 152 } 153 for (i = 1; i < _LC_LAST; ++i) 154 (void)strcpy(new_categories[i], locale); 155 } else { 156 for (i = 1; r[1] == '/'; ++r) 157 ; 158 if (!r[1]) { 159 errno = EINVAL; 160 return (NULL); /* Hmm, just slashes... */ 161 } 162 do { 163 if (i == _LC_LAST) 164 break; /* Too many slashes... */ 165 if ((len = r - locale) > ENCODING_LEN) { 166 errno = EINVAL; 167 return (NULL); 168 } 169 (void)strlcpy(new_categories[i], locale, 170 len + 1); 171 i++; 172 while (*r == '/') 173 r++; 174 locale = r; 175 while (*r && *r != '/') 176 r++; 177 } while (*locale); 178 while (i < _LC_LAST) { 179 (void)strcpy(new_categories[i], 180 new_categories[i - 1]); 181 i++; 182 } 183 } 184 } 185 186 if (category != LC_ALL) 187 return (loadlocale(category)); 188 189 for (i = 1; i < _LC_LAST; ++i) { 190 (void)strcpy(saved_categories[i], current_categories[i]); 191 if (loadlocale(i) == NULL) { 192 saverr = errno; 193 for (j = 1; j < i; j++) { 194 (void)strcpy(new_categories[j], 195 saved_categories[j]); 196 if (loadlocale(j) == NULL) { 197 (void)strcpy(new_categories[j], "C"); 198 (void)loadlocale(j); 199 } 200 } 201 errno = saverr; 202 return (NULL); 203 } 204 } 205 return (currentlocale()); 206 } 207 208 static char * 209 currentlocale(void) 210 { 211 int i; 212 213 (void)strcpy(current_locale_string, current_categories[1]); 214 215 for (i = 2; i < _LC_LAST; ++i) 216 if (strcmp(current_categories[1], current_categories[i])) { 217 for (i = 2; i < _LC_LAST; ++i) { 218 (void)strcat(current_locale_string, "/"); 219 (void)strcat(current_locale_string, 220 current_categories[i]); 221 } 222 break; 223 } 224 return (current_locale_string); 225 } 226 227 static char * 228 loadlocale(int category) 229 { 230 char *new = new_categories[category]; 231 char *old = current_categories[category]; 232 int (*func) (const char *); 233 int saved_errno; 234 235 if ((new[0] == '.' && 236 (new[1] == '\0' || (new[1] == '.' && new[2] == '\0'))) || 237 strchr(new, '/') != NULL) { 238 errno = EINVAL; 239 return (NULL); 240 } 241 saved_errno = errno; 242 errno = __detect_path_locale(); 243 if (errno != 0) 244 return (NULL); 245 errno = saved_errno; 246 247 switch (category) { 248 case LC_CTYPE: 249 func = __wrap_setrunelocale; 250 break; 251 case LC_COLLATE: 252 func = __collate_load_tables; 253 break; 254 case LC_TIME: 255 func = __time_load_locale; 256 break; 257 case LC_NUMERIC: 258 func = __numeric_load_locale; 259 break; 260 case LC_MONETARY: 261 func = __monetary_load_locale; 262 break; 263 case LC_MESSAGES: 264 func = __messages_load_locale; 265 break; 266 default: 267 errno = EINVAL; 268 return (NULL); 269 } 270 271 if (strcmp(new, old) == 0) 272 return (old); 273 274 if (func(new) != _LDP_ERROR) { 275 (void)strcpy(old, new); 276 (void)strcpy(__xlocale_global_locale.components[category-1]->locale, new); 277 return (old); 278 } 279 280 return (NULL); 281 } 282 283 const char * 284 __get_locale_env(int category) 285 { 286 const char *env; 287 288 /* 1. check LC_ALL. */ 289 env = getenv(categories[0]); 290 291 /* 2. check LC_* */ 292 if (env == NULL || !*env) 293 env = getenv(categories[category]); 294 295 /* 3. check LANG */ 296 if (env == NULL || !*env) 297 env = getenv("LANG"); 298 299 /* 4. if none is set, fall to "C" */ 300 if (env == NULL || !*env) 301 env = "C"; 302 303 return (env); 304 } 305 306 /* 307 * Detect locale storage location and store its value to _PathLocale variable 308 */ 309 int 310 __detect_path_locale(void) 311 { 312 if (_PathLocale == NULL) { 313 char *p = secure_getenv("PATH_LOCALE"); 314 315 if (p != NULL) { 316 if (strlen(p) + 1/*"/"*/ + ENCODING_LEN + 317 1/*"/"*/ + CATEGORY_LEN >= PATH_MAX) 318 return (ENAMETOOLONG); 319 _PathLocale = strdup(p); 320 if (_PathLocale == NULL) 321 return (errno == 0 ? ENOMEM : errno); 322 } else 323 _PathLocale = _PATH_LOCALE; 324 } 325 return (0); 326 } 327