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 <limits.h> 47 #include <locale.h> 48 #include <rune.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 #include "collate.h" 53 #include "lmonetary.h" /* for __monetary_load_locale() */ 54 #include "lnumeric.h" /* for __numeric_load_locale() */ 55 #include "lmessages.h" /* for __messages_load_locale() */ 56 #include "setlocale.h" 57 #include "../stdtime/timelocal.h" /* for __time_load_locale() */ 58 59 /* 60 * Category names for getenv() 61 */ 62 static char *categories[_LC_LAST] = { 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 * The locales we are going to try and load 87 */ 88 static char new_categories[_LC_LAST][ENCODING_LEN + 1]; 89 static char saved_categories[_LC_LAST][ENCODING_LEN + 1]; 90 91 static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)]; 92 93 static char *currentlocale(void); 94 static char *loadlocale(int); 95 96 char * 97 setlocale(category, locale) 98 int category; 99 const char *locale; 100 { 101 int i, j, len; 102 char *env, *r; 103 104 if (category < LC_ALL || category >= _LC_LAST) 105 return (NULL); 106 107 if (!locale) 108 return (category != LC_ALL ? 109 current_categories[category] : currentlocale()); 110 111 /* 112 * Default to the current locale for everything. 113 */ 114 for (i = 1; i < _LC_LAST; ++i) 115 (void)strcpy(new_categories[i], current_categories[i]); 116 117 /* 118 * Now go fill up new_categories from the locale argument 119 */ 120 if (!*locale) { 121 env = getenv("LC_ALL"); 122 123 if (category != LC_ALL && (!env || !*env)) 124 env = getenv(categories[category]); 125 126 if (!env || !*env) 127 env = getenv("LANG"); 128 129 if (!env || !*env || strchr(env, '/')) 130 env = "C"; 131 132 (void) strncpy(new_categories[category], env, ENCODING_LEN); 133 new_categories[category][ENCODING_LEN] = '\0'; 134 if (category == LC_ALL) { 135 for (i = 1; i < _LC_LAST; ++i) { 136 if (!(env = getenv(categories[i])) || !*env) 137 env = new_categories[LC_ALL]; 138 (void)strncpy(new_categories[i], env, ENCODING_LEN); 139 new_categories[i][ENCODING_LEN] = '\0'; 140 } 141 } 142 } else if (category != LC_ALL) { 143 (void)strncpy(new_categories[category], locale, ENCODING_LEN); 144 new_categories[category][ENCODING_LEN] = '\0'; 145 } else { 146 if ((r = strchr(locale, '/')) == NULL) { 147 for (i = 1; i < _LC_LAST; ++i) { 148 (void)strncpy(new_categories[i], locale, ENCODING_LEN); 149 new_categories[i][ENCODING_LEN] = '\0'; 150 } 151 } else { 152 for (i = 1; r[1] == '/'; ++r); 153 if (!r[1]) 154 return (NULL); /* Hmm, just slashes... */ 155 do { 156 len = r - locale > ENCODING_LEN ? ENCODING_LEN : r - locale; 157 (void)strncpy(new_categories[i], locale, len); 158 new_categories[i][len] = '\0'; 159 i++; 160 locale = r; 161 while (*locale == '/') 162 ++locale; 163 while (*++r && *r != '/'); 164 } while (*locale); 165 while (i < _LC_LAST) { 166 (void)strcpy(new_categories[i], 167 new_categories[i-1]); 168 i++; 169 } 170 } 171 } 172 173 if (category != LC_ALL) 174 return (loadlocale(category)); 175 176 for (i = 1; i < _LC_LAST; ++i) { 177 (void)strcpy(saved_categories[i], current_categories[i]); 178 if (loadlocale(i) == NULL) { 179 for (j = 1; j < i; j++) { 180 (void)strcpy(new_categories[j], 181 saved_categories[j]); 182 /* XXX can fail too */ 183 (void)loadlocale(j); 184 } 185 return (NULL); 186 } 187 } 188 return (currentlocale()); 189 } 190 191 static char * 192 currentlocale() 193 { 194 int i; 195 196 (void)strcpy(current_locale_string, current_categories[1]); 197 198 for (i = 2; i < _LC_LAST; ++i) 199 if (strcmp(current_categories[1], current_categories[i])) { 200 for (i = 2; i < _LC_LAST; ++i) { 201 (void) strcat(current_locale_string, "/"); 202 (void) strcat(current_locale_string, current_categories[i]); 203 } 204 break; 205 } 206 return (current_locale_string); 207 } 208 209 static char * 210 loadlocale(category) 211 int category; 212 { 213 char *ret; 214 char *new = new_categories[category]; 215 char *old = current_categories[category]; 216 217 if (_PathLocale == NULL) { 218 char *p = getenv("PATH_LOCALE"); 219 220 if (p != NULL 221 #ifndef __NETBSD_SYSCALLS 222 && !issetugid() 223 #endif 224 ) { 225 if (strlen(p) + 1/*"/"*/ + ENCODING_LEN + 226 1/*"/"*/ + CATEGORY_LEN >= PATH_MAX) 227 return (NULL); 228 _PathLocale = strdup(p); 229 if (_PathLocale == NULL) 230 return (NULL); 231 } else 232 _PathLocale = _PATH_LOCALE; 233 } 234 235 if (strcmp(new, old) == 0) 236 return (old); 237 238 if (category == LC_CTYPE) { 239 ret = setrunelocale(new) ? NULL : new; 240 if (!ret) 241 (void)setrunelocale(old); 242 else 243 (void)strcpy(old, new); 244 return (ret); 245 } 246 247 #define LOAD_CATEGORY(CAT, FUNC) \ 248 if (category == CAT) { \ 249 ret = (FUNC(new) < 0) ? NULL : new; \ 250 if (!ret) \ 251 (void)FUNC(old); \ 252 else \ 253 (void)strcpy(old, new); \ 254 return (ret); \ 255 } 256 257 LOAD_CATEGORY(LC_COLLATE, __collate_load_tables); 258 LOAD_CATEGORY(LC_TIME, __time_load_locale); 259 LOAD_CATEGORY(LC_NUMERIC, __numeric_load_locale); 260 LOAD_CATEGORY(LC_MONETARY, __monetary_load_locale); 261 LOAD_CATEGORY(LC_MESSAGES, __messages_load_locale); 262 263 /* Just in case...*/ 264 return (NULL); 265 } 266 267