1 /* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Paul Borman at Krystal Technologies. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #if defined(LIBC_SCCS) && !defined(lint) 38 static char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93"; 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include <sys/localedef.h> 42 #include <locale.h> 43 #include <limits.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <paths.h> 47 48 /* 49 * Category names for getenv() 50 */ 51 static char *categories[_LC_LAST] = { 52 "LC_ALL", 53 "LC_COLLATE", 54 "LC_CTYPE", 55 "LC_MONETARY", 56 "LC_NUMERIC", 57 "LC_TIME", 58 "LC_MESSAGES" 59 }; 60 61 /* 62 * Current locales for each category 63 */ 64 static char current_categories[_LC_LAST][32] = { 65 "C", 66 "C", 67 "C", 68 "C", 69 "C", 70 "C", 71 "C" 72 }; 73 74 /* 75 * The locales we are going to try and load 76 */ 77 static char new_categories[_LC_LAST][32]; 78 79 static char current_locale_string[_LC_LAST * 33]; 80 static char *PathLocale; 81 82 static char *currentlocale __P((void)); 83 static char *loadlocale __P((int)); 84 85 char * 86 setlocale(category, locale) 87 int category; 88 const char *locale; 89 { 90 int found, i, len; 91 char *env, *r; 92 93 if (!PathLocale && !(PathLocale = getenv("PATH_LOCALE"))) 94 PathLocale = _PATH_LOCALE; 95 96 if (category < 0 || category >= _LC_LAST) 97 return (NULL); 98 99 if (!locale) 100 return (category ? 101 current_categories[category] : currentlocale()); 102 103 /* 104 * Default to the current locale for everything. 105 */ 106 for (i = 1; i < _LC_LAST; ++i) 107 (void)strcpy(new_categories[i], current_categories[i]); 108 109 /* 110 * Now go fill up new_categories from the locale argument 111 */ 112 if (!*locale) { 113 env = getenv(categories[category]); 114 115 if (!env) 116 env = getenv(categories[0]); 117 118 if (!env) 119 env = getenv("LANG"); 120 121 if (!env) 122 env = "C"; 123 124 (void) strncpy(new_categories[category], env, 31); 125 new_categories[category][31] = 0; 126 if (!category) { 127 for (i = 1; i < _LC_LAST; ++i) { 128 if (!(env = getenv(categories[i]))) 129 env = new_categories[0]; 130 (void)strncpy(new_categories[i], env, 31); 131 new_categories[i][31] = 0; 132 } 133 } 134 } else if (category) { 135 (void)strncpy(new_categories[category], locale, 31); 136 new_categories[category][31] = 0; 137 } else { 138 if ((r = strchr(locale, '/')) == 0) { 139 for (i = 1; i < _LC_LAST; ++i) { 140 (void)strncpy(new_categories[i], locale, 31); 141 new_categories[i][31] = 0; 142 } 143 } else { 144 for (i = 1; r[1] == '/'; ++r); 145 if (!r[1]) 146 return (NULL); /* Hmm, just slashes... */ 147 do { 148 len = r - locale > 31 ? 31 : r - locale; 149 (void)strncpy(new_categories[i++], locale, len); 150 new_categories[i++][len] = 0; 151 locale = r; 152 while (*locale == '/') 153 ++locale; 154 while (*++r && *r != '/'); 155 } while (*locale); 156 while (i < _LC_LAST) 157 (void)strcpy(new_categories[i], 158 new_categories[i-1]); 159 } 160 } 161 162 if (category) 163 return (loadlocale(category)); 164 165 found = 0; 166 for (i = 1; i < _LC_LAST; ++i) 167 if (loadlocale(i) != NULL) 168 found = 1; 169 if (found) 170 return (currentlocale()); 171 return (NULL); 172 } 173 174 static char * 175 currentlocale() 176 { 177 int i; 178 179 (void)strcpy(current_locale_string, current_categories[1]); 180 181 for (i = 2; i < _LC_LAST; ++i) 182 if (strcmp(current_categories[1], current_categories[i])) { 183 (void)snprintf(current_locale_string, 184 sizeof(current_locale_string), "%s/%s/%s/%s/%s", 185 current_categories[1], current_categories[2], 186 current_categories[3], current_categories[4], 187 current_categories[5]); 188 break; 189 } 190 return (current_locale_string); 191 } 192 193 static char * 194 loadlocale(category) 195 int category; 196 { 197 char name[PATH_MAX]; 198 199 if (strcmp(new_categories[category], 200 current_categories[category]) == 0) 201 return (current_categories[category]); 202 203 if (!strcmp(new_categories[category], "C") || 204 !strcmp(new_categories[category], "POSIX")) { 205 206 /* 207 * Some day this will need to reset the locale to the default 208 * C locale. Since we have no way to change them as of yet, 209 * there is no need to reset them. 210 */ 211 (void)strcpy(current_categories[category], 212 new_categories[category]); 213 return (current_categories[category]); 214 } 215 216 /* 217 * Some day we will actually look at this file. 218 */ 219 (void)snprintf(name, sizeof(name), "%s/%s/%s", 220 PathLocale, new_categories[category], categories[category]); 221 222 switch (category) { 223 case LC_CTYPE: 224 case LC_COLLATE: 225 case LC_MESSAGES: 226 case LC_MONETARY: 227 case LC_NUMERIC: 228 case LC_TIME: 229 return (NULL); 230 } 231 } 232