setlocale.c revision 1.21
1 /* $NetBSD: setlocale.c,v 1.21 2000/09/09 20:50:33 veego 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 1.21 2000/09/09 20:50:33 veego 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 <unistd.h> 61 #include "ctypeio.h" 62 63 /* 64 * Category names for getenv() 65 */ 66 static const char *const categories[_LC_LAST] = { 67 "LC_ALL", 68 "LC_COLLATE", 69 "LC_CTYPE", 70 "LC_MONETARY", 71 "LC_NUMERIC", 72 "LC_TIME", 73 "LC_MESSAGES" 74 }; 75 76 /* 77 * Current locales for each category 78 */ 79 static char current_categories[_LC_LAST][32] = { 80 "C", 81 "C", 82 "C", 83 "C", 84 "C", 85 "C", 86 "C" 87 }; 88 89 size_t __mb_cur_max = 1; 90 91 /* 92 * The locales we are going to try and load 93 */ 94 static char new_categories[_LC_LAST][32]; 95 96 static char current_locale_string[_LC_LAST * 33]; 97 static char *PathLocale; 98 99 static char *currentlocale __P((void)); 100 static char *loadlocale __P((int)); 101 102 char * 103 __setlocale_mb_len_max_32(category, locale) 104 int category; 105 const char *locale; 106 { 107 int i; 108 size_t len; 109 char *env, *r; 110 111 if (issetugid() || 112 (!PathLocale && !(PathLocale = getenv("PATH_LOCALE")))) 113 PathLocale = _PATH_LOCALE; 114 115 if (category < 0 || category >= _LC_LAST) 116 return (NULL); 117 118 if (!locale) 119 return (category ? 120 current_categories[category] : currentlocale()); 121 122 /* 123 * Default to the current locale for everything. 124 */ 125 for (i = 1; i < _LC_LAST; ++i) 126 (void)strncpy(new_categories[i], current_categories[i], 127 sizeof(new_categories[i]) - 1); 128 129 /* 130 * Now go fill up new_categories from the locale argument 131 */ 132 if (!*locale) { 133 env = getenv(categories[category]); 134 135 if (!env || !*env) 136 env = getenv(categories[0]); 137 138 if (!env || !*env) 139 env = getenv("LANG"); 140 141 if (!env || !*env || strchr(env, '/')) 142 env = "C"; 143 144 (void)strncpy(new_categories[category], env, 31); 145 new_categories[category][31] = 0; 146 if (!category) { 147 for (i = 1; i < _LC_LAST; ++i) { 148 if (!(env = getenv(categories[i])) || !*env) 149 env = new_categories[0]; 150 (void)strncpy(new_categories[i], env, 31); 151 new_categories[i][31] = 0; 152 } 153 } 154 } else if (category) { 155 (void)strncpy(new_categories[category], locale, 31); 156 new_categories[category][31] = 0; 157 } else { 158 if ((r = strchr(locale, '/')) == 0) { 159 for (i = 1; i < _LC_LAST; ++i) { 160 (void)strncpy(new_categories[i], locale, 31); 161 new_categories[i][31] = 0; 162 } 163 } else { 164 for (i = 1; r[1] == '/'; ++r); 165 if (!r[1]) 166 return (NULL); /* Hmm, just slashes... */ 167 do { 168 len = r - locale > 31 ? 31 : r - locale; 169 (void)strncpy(new_categories[i++], locale, len); 170 new_categories[i++][len] = 0; 171 locale = r; 172 while (*locale == '/') 173 ++locale; 174 while (*++r && *r != '/'); 175 } while (*locale); 176 while (i < _LC_LAST) 177 (void)strncpy(new_categories[i], 178 new_categories[i-1], 179 sizeof(new_categories[i]) - 1); 180 } 181 } 182 183 if (category) 184 return (loadlocale(category)); 185 186 for (i = 1; i < _LC_LAST; ++i) 187 (void) loadlocale(i); 188 189 return (currentlocale()); 190 } 191 192 static char * 193 currentlocale() 194 { 195 int i; 196 197 (void)strncpy(current_locale_string, current_categories[1], 198 sizeof(current_locale_string) - 1); 199 200 for (i = 2; i < _LC_LAST; ++i) 201 if (strcmp(current_categories[1], current_categories[i])) { 202 (void)snprintf(current_locale_string, 203 sizeof(current_locale_string), "%s/%s/%s/%s/%s", 204 current_categories[1], current_categories[2], 205 current_categories[3], current_categories[4], 206 current_categories[5]); 207 break; 208 } 209 return (current_locale_string); 210 } 211 212 static char * 213 loadlocale(category) 214 int category; 215 { 216 char name[PATH_MAX]; 217 218 if (strcmp(new_categories[category], current_categories[category]) == 0) 219 return (current_categories[category]); 220 221 if (!strcmp(new_categories[category], "C") || 222 !strcmp(new_categories[category], "POSIX")) { 223 224 switch (category) { 225 case LC_CTYPE: 226 if (_ctype_ != _C_ctype_) { 227 /* LINTED const castaway */ 228 free((void *)_ctype_); 229 _ctype_ = _C_ctype_; 230 } 231 if (_toupper_tab_ != _C_toupper_) { 232 /* LINTED const castaway */ 233 free((void *)_toupper_tab_); 234 _toupper_tab_ = _C_toupper_; 235 } 236 if (_tolower_tab_ != _C_tolower_) { 237 /* LINTED const castaway */ 238 free((void *)_tolower_tab_); 239 _tolower_tab_ = _C_tolower_; 240 } 241 } 242 243 (void)strncpy(current_categories[category], 244 new_categories[category], 245 sizeof(current_categories[category]) - 1); 246 return current_categories[category]; 247 } 248 249 /* 250 * Some day we will actually look at this file. 251 */ 252 (void)snprintf(name, sizeof(name), "%s/%s/%s", 253 PathLocale, new_categories[category], categories[category]); 254 255 switch (category) { 256 case LC_CTYPE: 257 if (__loadctype(name)) { 258 (void)strncpy(current_categories[category], 259 new_categories[category], 260 sizeof(current_categories[category]) - 1); 261 return current_categories[category]; 262 } 263 return NULL; 264 265 case LC_COLLATE: 266 case LC_MESSAGES: 267 case LC_MONETARY: 268 case LC_NUMERIC: 269 case LC_TIME: 270 return NULL; 271 } 272 273 return NULL; 274 } 275
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