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 #ifdef LIBC_RCS 39 static const char rcsid[] = 40 "$FreeBSD$"; 41 #endif 42 43 #if defined(LIBC_SCCS) && !defined(lint) 44 static char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93"; 45 #endif /* LIBC_SCCS and not lint */ 46 47 #include <sys/types.h> 48 #include <sys/stat.h> 49 #include <limits.h> 50 #include <locale.h> 51 #include <rune.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <unistd.h> 55 #include "collate.h" 56 #include "lmonetary.h" /* for __monetary_load_locale() */ 57 #include "lnumeric.h" /* for __numeric_load_locale() */ 58 #include "lmessages.h" /* for __messages_load_locale() */ 59 #include "setlocale.h" 60 #include "../stdtime/timelocal.h" /* for __time_load_locale() */ 61 62 /* 63 * Category names for getenv() 64 */ 65 static char *categories[_LC_LAST] = { 66 "LC_ALL", 67 "LC_COLLATE", 68 "LC_CTYPE", 69 "LC_MONETARY", 70 "LC_NUMERIC", 71 "LC_TIME", 72 "LC_MESSAGES", 73 }; 74 75 /* 76 * Current locales for each category 77 */ 78 static char current_categories[_LC_LAST][ENCODING_LEN + 1] = { 79 "C", 80 "C", 81 "C", 82 "C", 83 "C", 84 "C", 85 "C", 86 }; 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 __P((void)); 97 static char *loadlocale __P((int)); 98 99 char * 100 setlocale(category, locale) 101 int category; 102 const char *locale; 103 { 104 int i, j, len; 105 char *env, *r; 106 107 if (category < LC_ALL || category >= _LC_LAST) 108 return (NULL); 109 110 if (!locale) 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 env = getenv("LC_ALL"); 125 126 if (category != LC_ALL && (!env || !*env)) 127 env = getenv(categories[category]); 128 129 if (!env || !*env) 130 env = getenv("LANG"); 131 132 if (!env || !*env || strchr(env, '/')) 133 env = "C"; 134 135 (void) strncpy(new_categories[category], env, ENCODING_LEN); 136 new_categories[category][ENCODING_LEN] = '\0'; 137 if (category == LC_ALL) { 138 for (i = 1; i < _LC_LAST; ++i) { 139 if (!(env = getenv(categories[i])) || !*env) 140 env = new_categories[LC_ALL]; 141 (void)strncpy(new_categories[i], env, ENCODING_LEN); 142 new_categories[i][ENCODING_LEN] = '\0'; 143 } 144 } 145 } else if (category != LC_ALL) { 146 (void)strncpy(new_categories[category], locale, ENCODING_LEN); 147 new_categories[category][ENCODING_LEN] = '\0'; 148 } else { 149 if ((r = strchr(locale, '/')) == NULL) { 150 for (i = 1; i < _LC_LAST; ++i) { 151 (void)strncpy(new_categories[i], locale, ENCODING_LEN); 152 new_categories[i][ENCODING_LEN] = '\0'; 153 } 154 } else { 155 for (i = 1; r[1] == '/'; ++r); 156 if (!r[1]) 157 return (NULL); /* Hmm, just slashes... */ 158 do { 159 len = r - locale > ENCODING_LEN ? ENCODING_LEN : r - locale; 160 (void)strncpy(new_categories[i], locale, len); 161 new_categories[i][len] = '\0'; 162 i++; 163 locale = r; 164 while (*locale == '/') 165 ++locale; 166 while (*++r && *r != '/'); 167 } while (*locale); 168 while (i < _LC_LAST) { 169 (void)strcpy(new_categories[i], 170 new_categories[i-1]); 171 i++; 172 } 173 } 174 } 175 176 if (category != LC_ALL) 177 return (loadlocale(category)); 178 179 for (i = 1; i < _LC_LAST; ++i) { 180 (void)strcpy(saved_categories[i], current_categories[i]); 181 if (loadlocale(i) == NULL) { 182 for (j = 1; j < i; j++) { 183 (void)strcpy(new_categories[j], 184 saved_categories[j]); 185 /* XXX can fail too */ 186 (void)loadlocale(j); 187 } 188 return (NULL); 189 } 190 } 191 return (currentlocale()); 192 } 193 194 static char * 195 currentlocale() 196 { 197 int i; 198 199 (void)strcpy(current_locale_string, current_categories[1]); 200 201 for (i = 2; i < _LC_LAST; ++i) 202 if (strcmp(current_categories[1], current_categories[i])) { 203 for (i = 2; i < _LC_LAST; ++i) { 204 (void) strcat(current_locale_string, "/"); 205 (void) strcat(current_locale_string, current_categories[i]); 206 } 207 break; 208 } 209 return (current_locale_string); 210 } 211 212 static char * 213 loadlocale(category) 214 int category; 215 { 216 char *ret; 217 char *new = new_categories[category]; 218 char *old = current_categories[category]; 219 220 if (_PathLocale == NULL) { 221 char *p = getenv("PATH_LOCALE"); 222 223 if (p != NULL 224 #ifndef __NETBSD_SYSCALLS 225 && !issetugid() 226 #endif 227 ) { 228 if (strlen(p) + 1/*"/"*/ + ENCODING_LEN + 229 1/*"/"*/ + CATEGORY_LEN >= PATH_MAX) 230 return (NULL); 231 _PathLocale = strdup(p); 232 if (_PathLocale == NULL) 233 return (NULL); 234 } else 235 _PathLocale = _PATH_LOCALE; 236 } 237 238 if (strcmp(new, old) == 0) 239 return (old); 240 241 if (category == LC_CTYPE) { 242 ret = setrunelocale(new) ? NULL : new; 243 if (!ret) 244 (void)setrunelocale(old); 245 else 246 (void)strcpy(old, new); 247 return (ret); 248 } 249 250 #define LOAD_CATEGORY(CAT, FUNC) \ 251 if (category == CAT) { \ 252 ret = (FUNC(new) < 0) ? NULL : new; \ 253 if (!ret) \ 254 (void)FUNC(old); \ 255 else \ 256 (void)strcpy(old, new); \ 257 return (ret); \ 258 } 259 260 LOAD_CATEGORY(LC_COLLATE, __collate_load_tables); 261 LOAD_CATEGORY(LC_TIME, __time_load_locale); 262 LOAD_CATEGORY(LC_NUMERIC, __numeric_load_locale); 263 LOAD_CATEGORY(LC_MONETARY, __monetary_load_locale); 264 LOAD_CATEGORY(LC_MESSAGES, __messages_load_locale); 265 266 /* Just in case...*/ 267 return (NULL); 268 } 269 270