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 <limits.h> 42 #include <locale.h> 43 #include <rune.h> 44 #include <stdlib.h> 45 #include <string.h> 46 47 /* 48 * Category names for getenv() 49 */ 50 static char *categories[_LC_LAST] = { 51 "LC_ALL", 52 "LC_COLLATE", 53 "LC_CTYPE", 54 "LC_MONETARY", 55 "LC_NUMERIC", 56 "LC_TIME", 57 }; 58 59 /* 60 * Current locales for each category 61 */ 62 static char current_categories[_LC_LAST][32] = { 63 "C", 64 "C", 65 "C", 66 "C", 67 "C", 68 "C", 69 }; 70 71 /* 72 * The locales we are going to try and load 73 */ 74 static char new_categories[_LC_LAST][32]; 75 76 static char current_locale_string[_LC_LAST * 33]; 77 static char *PathLocale; 78 79 static char *currentlocale __P((void)); 80 static char *loadlocale __P((int)); 81 82 char * 83 setlocale(category, locale) 84 int category; 85 const char *locale; 86 { 87 int found, i, len; 88 char *env, *r; 89 90 if (!PathLocale && !(PathLocale = getenv("PATH_LOCALE"))) 91 PathLocale = _PATH_LOCALE; 92 93 if (category < 0 || category >= _LC_LAST) 94 return (NULL); 95 96 if (!locale) 97 return (category ? 98 current_categories[category] : currentlocale()); 99 100 /* 101 * Default to the current locale for everything. 102 */ 103 for (i = 1; i < _LC_LAST; ++i) 104 (void)strcpy(new_categories[i], current_categories[i]); 105 106 /* 107 * Now go fill up new_categories from the locale argument 108 */ 109 if (!*locale) { 110 env = getenv(categories[category]); 111 112 if (!env) 113 env = getenv(categories[0]); 114 115 if (!env) 116 env = getenv("LANG"); 117 118 if (!env) 119 env = "C"; 120 121 (void) strncpy(new_categories[category], env, 31); 122 new_categories[category][31] = 0; 123 if (!category) { 124 for (i = 1; i < _LC_LAST; ++i) { 125 if (!(env = getenv(categories[i]))) 126 env = new_categories[0]; 127 (void)strncpy(new_categories[i], env, 31); 128 new_categories[i][31] = 0; 129 } 130 } 131 } else if (category) { 132 (void)strncpy(new_categories[category], locale, 31); 133 new_categories[category][31] = 0; 134 } else { 135 if ((r = strchr(locale, '/')) == 0) { 136 for (i = 1; i < _LC_LAST; ++i) { 137 (void)strncpy(new_categories[i], locale, 31); 138 new_categories[i][31] = 0; 139 } 140 } else { 141 for (i = 1; r[1] == '/'; ++r); 142 if (!r[1]) 143 return (NULL); /* Hmm, just slashes... */ 144 do { 145 len = r - locale > 31 ? 31 : r - locale; 146 (void)strncpy(new_categories[i++], locale, len); 147 new_categories[i++][len] = 0; 148 locale = r; 149 while (*locale == '/') 150 ++locale; 151 while (*++r && *r != '/'); 152 } while (*locale); 153 while (i < _LC_LAST) 154 (void)strcpy(new_categories[i], 155 new_categories[i-1]); 156 } 157 } 158 159 if (category) 160 return (loadlocale(category)); 161 162 found = 0; 163 for (i = 1; i < _LC_LAST; ++i) 164 if (loadlocale(i) != NULL) 165 found = 1; 166 if (found) 167 return (currentlocale()); 168 return (NULL); 169 } 170 171 static char * 172 currentlocale() 173 { 174 int i; 175 176 (void)strcpy(current_locale_string, current_categories[1]); 177 178 for (i = 2; i < _LC_LAST; ++i) 179 if (strcmp(current_categories[1], current_categories[i])) { 180 (void)snprintf(current_locale_string, 181 sizeof(current_locale_string), "%s/%s/%s/%s/%s", 182 current_categories[1], current_categories[2], 183 current_categories[3], current_categories[4], 184 current_categories[5]); 185 break; 186 } 187 return (current_locale_string); 188 } 189 190 static char * 191 loadlocale(category) 192 int category; 193 { 194 char name[PATH_MAX]; 195 196 if (strcmp(new_categories[category], 197 current_categories[category]) == 0) 198 return (current_categories[category]); 199 200 if (category == LC_CTYPE) { 201 if (setrunelocale(new_categories[LC_CTYPE])) 202 return (NULL); 203 (void)strcpy(current_categories[LC_CTYPE], 204 new_categories[LC_CTYPE]); 205 return (current_categories[LC_CTYPE]); 206 } 207 208 if (!strcmp(new_categories[category], "C") || 209 !strcmp(new_categories[category], "POSIX")) { 210 211 /* 212 * Some day this will need to reset the locale to the default 213 * C locale. Since we have no way to change them as of yet, 214 * there is no need to reset them. 215 */ 216 (void)strcpy(current_categories[category], 217 new_categories[category]); 218 return (current_categories[category]); 219 } 220 221 /* 222 * Some day we will actually look at this file. 223 */ 224 (void)snprintf(name, sizeof(name), "%s/%s/%s", 225 PathLocale, new_categories[category], categories[category]); 226 227 switch (category) { 228 case LC_COLLATE: 229 case LC_MONETARY: 230 case LC_NUMERIC: 231 case LC_TIME: 232 return (NULL); 233 } 234 } 235