setlocale.c revision 1.18
1 /* $NetBSD: setlocale.c,v 1.18 2000/08/08 22:31:14 tshiozak Exp $ */ 2 3 /* 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Paul Borman at Krystal Technologies. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #if defined(LIBC_SCCS) && !defined(lint) 41 #if 0 42 static char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93"; 43 #else 44 __RCSID("$NetBSD: setlocale.c,v 1.18 2000/08/08 22:31:14 tshiozak Exp $"); 45 #endif 46 #endif /* LIBC_SCCS and not lint */ 47 48 #define _CTYPE_PRIVATE 49 50 #include "namespace.h" 51 #include <sys/localedef.h> 52 #include <ctype.h> 53 #include <limits.h> 54 #define __SETLOCALE_SOURCE__ 55 #include <locale.h> 56 #include <paths.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include "ctypeio.h" 61 62 /* 63 * Category names for getenv() 64 */ 65 static const char *const 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][32] = { 79 "C", 80 "C", 81 "C", 82 "C", 83 "C", 84 "C", 85 "C" 86 }; 87 int __mb_cur_max = 1; 88 89 /* 90 * The locales we are going to try and load 91 */ 92 static char new_categories[_LC_LAST][32]; 93 94 static char current_locale_string[_LC_LAST * 33]; 95 static char *PathLocale; 96 97 static char *currentlocale __P((void)); 98 static char *loadlocale __P((int)); 99 100 char * 101 __setlocale_mb_len_max_32(category, locale) 102 int category; 103 const char *locale; 104 { 105 int i; 106 size_t len; 107 char *env, *r; 108 109 /* 110 * XXX potential security problem here with set-id programs 111 * being able to read files the user can not normally read. 112 */ 113 if (!PathLocale && !(PathLocale = getenv("PATH_LOCALE"))) 114 PathLocale = _PATH_LOCALE; 115 116 if (category < 0 || category >= _LC_LAST) 117 return (NULL); 118 119 if (!locale) 120 return (category ? 121 current_categories[category] : currentlocale()); 122 123 /* 124 * Default to the current locale for everything. 125 */ 126 for (i = 1; i < _LC_LAST; ++i) 127 (void)strncpy(new_categories[i], current_categories[i], 128 sizeof(new_categories[i]) - 1); 129 130 /* 131 * Now go fill up new_categories from the locale argument 132 */ 133 if (!*locale) { 134 env = getenv(categories[category]); 135 136 if (!env || !*env) 137 env = getenv(categories[0]); 138 139 if (!env || !*env) 140 env = getenv("LANG"); 141 142 if (!env || !*env) 143 env = "C"; 144 145 (void)strncpy(new_categories[category], env, 31); 146 new_categories[category][31] = 0; 147 if (!category) { 148 for (i = 1; i < _LC_LAST; ++i) { 149 if (!(env = getenv(categories[i])) || !*env) 150 env = new_categories[0]; 151 (void)strncpy(new_categories[i], env, 31); 152 new_categories[i][31] = 0; 153 } 154 } 155 } else if (category) { 156 (void)strncpy(new_categories[category], locale, 31); 157 new_categories[category][31] = 0; 158 } else { 159 if ((r = strchr(locale, '/')) == 0) { 160 for (i = 1; i < _LC_LAST; ++i) { 161 (void)strncpy(new_categories[i], locale, 31); 162 new_categories[i][31] = 0; 163 } 164 } else { 165 for (i = 1; r[1] == '/'; ++r); 166 if (!r[1]) 167 return (NULL); /* Hmm, just slashes... */ 168 do { 169 len = r - locale > 31 ? 31 : r - locale; 170 (void)strncpy(new_categories[i++], locale, len); 171 new_categories[i++][len] = 0; 172 locale = r; 173 while (*locale == '/') 174 ++locale; 175 while (*++r && *r != '/'); 176 } while (*locale); 177 while (i < _LC_LAST) 178 (void)strncpy(new_categories[i], 179 new_categories[i-1], 180 sizeof(new_categories[i]) - 1); 181 } 182 } 183 184 if (category) 185 return (loadlocale(category)); 186 187 for (i = 1; i < _LC_LAST; ++i) 188 (void) loadlocale(i); 189 190 return (currentlocale()); 191 } 192 193 static char * 194 currentlocale() 195 { 196 int i; 197 198 (void)strncpy(current_locale_string, current_categories[1], 199 sizeof(current_locale_string) - 1); 200 201 for (i = 2; i < _LC_LAST; ++i) 202 if (strcmp(current_categories[1], current_categories[i])) { 203 (void)snprintf(current_locale_string, 204 sizeof(current_locale_string), "%s/%s/%s/%s/%s", 205 current_categories[1], current_categories[2], 206 current_categories[3], current_categories[4], 207 current_categories[5]); 208 break; 209 } 210 return (current_locale_string); 211 } 212 213 static char * 214 loadlocale(category) 215 int category; 216 { 217 char name[PATH_MAX]; 218 219 if (strcmp(new_categories[category], current_categories[category]) == 0) 220 return (current_categories[category]); 221 222 if (!strcmp(new_categories[category], "C") || 223 !strcmp(new_categories[category], "POSIX")) { 224 225 switch (category) { 226 case LC_CTYPE: 227 if (_ctype_ != _C_ctype_) { 228 /* LINTED const castaway */ 229 free((void *)_ctype_); 230 _ctype_ = _C_ctype_; 231 } 232 if (_toupper_tab_ != _C_toupper_) { 233 /* LINTED const castaway */ 234 free((void *)_toupper_tab_); 235 _toupper_tab_ = _C_toupper_; 236 } 237 if (_tolower_tab_ != _C_tolower_) { 238 /* LINTED const castaway */ 239 free((void *)_tolower_tab_); 240 _tolower_tab_ = _C_tolower_; 241 } 242 } 243 244 (void)strncpy(current_categories[category], 245 new_categories[category], 246 sizeof(current_categories[category]) - 1); 247 return current_categories[category]; 248 } 249 250 /* 251 * Some day we will actually look at this file. 252 */ 253 (void)snprintf(name, sizeof(name), "%s/%s/%s", 254 PathLocale, new_categories[category], categories[category]); 255 256 switch (category) { 257 case LC_CTYPE: 258 if (__loadctype(name)) { 259 (void)strncpy(current_categories[category], 260 new_categories[category], 261 sizeof(current_categories[category]) - 1); 262 return current_categories[category]; 263 } 264 return NULL; 265 266 case LC_COLLATE: 267 case LC_MESSAGES: 268 case LC_MONETARY: 269 case LC_NUMERIC: 270 case LC_TIME: 271 return NULL; 272 } 273 274 return NULL; 275 } 276
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