setlocale.c revision 92905
133965Sjdp/* 233965Sjdp * Copyright (c) 1996 - 2002 FreeBSD Project 333965Sjdp * Copyright (c) 1991, 1993 433965Sjdp * The Regents of the University of California. All rights reserved. 533965Sjdp * 633965Sjdp * This code is derived from software contributed to Berkeley by 733965Sjdp * Paul Borman at Krystal Technologies. 833965Sjdp * 933965Sjdp * Redistribution and use in source and binary forms, with or without 1033965Sjdp * modification, are permitted provided that the following conditions 1133965Sjdp * are met: 1233965Sjdp * 1. Redistributions of source code must retain the above copyright 1333965Sjdp * notice, this list of conditions and the following disclaimer. 1433965Sjdp * 2. Redistributions in binary form must reproduce the above copyright 1533965Sjdp * notice, this list of conditions and the following disclaimer in the 1633965Sjdp * documentation and/or other materials provided with the distribution. 1733965Sjdp * 3. All advertising materials mentioning features or use of this software 1838889Sjdp * must display the following acknowledgement: 1933965Sjdp * This product includes software developed by the University of 2033965Sjdp * California, Berkeley and its contributors. 2133965Sjdp * 4. Neither the name of the University nor the names of its contributors 2238889Sjdp * may be used to endorse or promote products derived from this software 2333965Sjdp * without specific prior written permission. 2433965Sjdp * 2533965Sjdp * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2660484Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2733965Sjdp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2833965Sjdp * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2933965Sjdp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3077298Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3177298Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3233965Sjdp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3333965Sjdp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3433965Sjdp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3533965Sjdp * SUCH DAMAGE. 3633965Sjdp */ 3733965Sjdp 3833965Sjdp#ifdef LIBC_RCS 3933965Sjdpstatic const char rcsid[] = 4033965Sjdp "$FreeBSD: head/lib/libc/locale/setlocale.c 92905 2002-03-21 22:49:10Z obrien $"; 4133965Sjdp#endif 4233965Sjdp 4333965Sjdp#if defined(LIBC_SCCS) && !defined(lint) 4433965Sjdpstatic char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93"; 4533965Sjdp#endif /* LIBC_SCCS and not lint */ 4633965Sjdp 4733965Sjdp#include <sys/types.h> 4833965Sjdp#include <sys/stat.h> 4933965Sjdp#include <limits.h> 5033965Sjdp#include <locale.h> 5177298Sobrien#include <rune.h> 5277298Sobrien#include <stdlib.h> 5377298Sobrien#include <string.h> 5477298Sobrien#include <unistd.h> 5533965Sjdp#include "collate.h" 5633965Sjdp#include "lmonetary.h" /* for __monetary_load_locale() */ 5733965Sjdp#include "lnumeric.h" /* for __numeric_load_locale() */ 5833965Sjdp#include "lmessages.h" /* for __messages_load_locale() */ 5933965Sjdp#include "setlocale.h" 6033965Sjdp#include "../stdtime/timelocal.h" /* for __time_load_locale() */ 6133965Sjdp 6233965Sjdp/* 6333965Sjdp * Category names for getenv() 6433965Sjdp */ 6533965Sjdpstatic char *categories[_LC_LAST] = { 6633965Sjdp "LC_ALL", 6733965Sjdp "LC_COLLATE", 6833965Sjdp "LC_CTYPE", 6933965Sjdp "LC_MONETARY", 7033965Sjdp "LC_NUMERIC", 7133965Sjdp "LC_TIME", 7260484Sobrien "LC_MESSAGES", 7360484Sobrien}; 7433965Sjdp 7533965Sjdp/* 7633965Sjdp * Current locales for each category 7733965Sjdp */ 7833965Sjdpstatic 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 */ 91static char new_categories[_LC_LAST][ENCODING_LEN + 1]; 92static char saved_categories[_LC_LAST][ENCODING_LEN + 1]; 93 94static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)]; 95 96static char *currentlocale(void); 97static char *loadlocale(int); 98 99char * 100setlocale(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 194static char * 195currentlocale() 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 212static char * 213loadlocale(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