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 * $FreeBSD$ 37 */ 38 39 #ifdef LIBC_RCS 40 static const char rcsid[] = 41 "$FreeBSD$"; 42 #endif 43 44 #if defined(LIBC_SCCS) && !defined(lint) 45 static char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93"; 46 #endif /* LIBC_SCCS and not lint */ 47 48 #include <sys/types.h> 49 #include <sys/stat.h> 50 #include <limits.h> 51 #include <locale.h> 52 #include <rune.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <unistd.h> 56 #include "collate.h" 57 #include "setlocale.h" 58 59 /* 60 * Category names for getenv() 61 */ 62 static char *categories[_LC_LAST] = { 63 "LC_ALL", 64 "LC_COLLATE", 65 "LC_CTYPE", 66 "LC_MONETARY", 67 "LC_NUMERIC", 68 "LC_TIME", 69 }; 70 71 /* 72 * Current locales for each category 73 */ 74 static char current_categories[_LC_LAST][ENCODING_LEN + 1] = { 75 "C", 76 "C", 77 "C", 78 "C", 79 "C", 80 "C", 81 }; 82 83 /* 84 * The locales we are going to try and load 85 */ 86 static char new_categories[_LC_LAST][ENCODING_LEN + 1]; 87 static char saved_categories[_LC_LAST][ENCODING_LEN + 1]; 88 89 static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)]; 90 91 static char *currentlocale __P((void)); 92 static char *loadlocale __P((int)); 93 static int stub_load_locale __P((const char *)); 94 95 extern int __time_load_locale __P((const char *)); /* strftime.c */ 96 97 #ifdef XPG4 98 extern int _xpg4_setrunelocale __P((char *)); 99 #endif 100 101 char * 102 setlocale(category, locale) 103 int category; 104 const char *locale; 105 { 106 int i, j, len; 107 char *env, *r; 108 109 if (category < LC_ALL || category >= _LC_LAST) 110 return (NULL); 111 112 if (!locale) 113 return (category != LC_ALL ? 114 current_categories[category] : currentlocale()); 115 116 /* 117 * Default to the current locale for everything. 118 */ 119 for (i = 1; i < _LC_LAST; ++i) 120 (void)strcpy(new_categories[i], current_categories[i]); 121 122 /* 123 * Now go fill up new_categories from the locale argument 124 */ 125 if (!*locale) { 126 env = getenv(categories[category]); 127 128 if (category != LC_ALL && (!env || !*env)) 129 env = getenv(categories[LC_ALL]); 130 131 if (!env || !*env) 132 env = getenv("LANG"); 133 134 if (!env || !*env) 135 env = "C"; 136 137 (void) strncpy(new_categories[category], env, ENCODING_LEN); 138 new_categories[category][ENCODING_LEN] = '\0'; 139 if (category == LC_ALL) { 140 for (i = 1; i < _LC_LAST; ++i) { 141 if (!(env = getenv(categories[i])) || !*env) 142 env = new_categories[LC_ALL]; 143 (void)strncpy(new_categories[i], env, ENCODING_LEN); 144 new_categories[i][ENCODING_LEN] = '\0'; 145 } 146 } 147 } else if (category != LC_ALL) { 148 (void)strncpy(new_categories[category], locale, ENCODING_LEN); 149 new_categories[category][ENCODING_LEN] = '\0'; 150 } else { 151 if ((r = strchr(locale, '/')) == NULL) { 152 for (i = 1; i < _LC_LAST; ++i) { 153 (void)strncpy(new_categories[i], locale, ENCODING_LEN); 154 new_categories[i][ENCODING_LEN] = '\0'; 155 } 156 } else { 157 for (i = 1; r[1] == '/'; ++r); 158 if (!r[1]) 159 return (NULL); /* Hmm, just slashes... */ 160 do { 161 len = r - locale > ENCODING_LEN ? ENCODING_LEN : r - locale; 162 (void)strncpy(new_categories[i], locale, len); 163 new_categories[i][len] = '\0'; 164 i++; 165 locale = r; 166 while (*locale == '/') 167 ++locale; 168 while (*++r && *r != '/'); 169 } while (*locale); 170 while (i < _LC_LAST) 171 (void)strcpy(new_categories[i], 172 new_categories[i-1]); 173 } 174 } 175 176 if (category) 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 } 193 194 static char * 195 currentlocale() 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 (void) strcpy(current_locale_string, current_categories[1]); 204 (void) strcat(current_locale_string, "/"); 205 (void) strcat(current_locale_string, current_categories[2]); 206 (void) strcat(current_locale_string, "/"); 207 (void) strcat(current_locale_string, current_categories[3]); 208 (void) strcat(current_locale_string, "/"); 209 (void) strcat(current_locale_string, current_categories[4]); 210 (void) strcat(current_locale_string, "/"); 211 (void) strcat(current_locale_string, current_categories[5]); 212 break; 213 } 214 return (current_locale_string); 215 } 216 217 static char * 218 loadlocale(category) 219 int category; 220 { 221 char *ret; 222 char *new = new_categories[category]; 223 char *old = current_categories[category]; 224 225 if (!_PathLocale) 226 _PathLocale = _PATH_LOCALE; 227 228 if (strcmp(new, old) == 0) 229 return (old); 230 231 if (category == LC_CTYPE) { 232 #ifdef XPG4 233 ret = _xpg4_setrunelocale(new) ? NULL : new; 234 #else 235 ret = setrunelocale(new) ? NULL : new; 236 #endif 237 if (!ret) { 238 #ifdef XPG4 239 (void)_xpg4_setrunelocale(old); 240 #else 241 (void)setrunelocale(old); 242 #endif 243 } else 244 (void)strcpy(old, new); 245 return (ret); 246 } 247 248 if (category == LC_COLLATE) { 249 ret = (__collate_load_tables(new) < 0) ? NULL : new; 250 if (!ret) 251 (void)__collate_load_tables(old); 252 else 253 (void)strcpy(old, new); 254 return (ret); 255 } 256 257 if (category == LC_TIME) { 258 ret = (__time_load_locale(new) < 0) ? NULL : new; 259 if (!ret) 260 (void)__time_load_locale(old); 261 else 262 (void)strcpy(old, new); 263 return (ret); 264 } 265 266 if (category == LC_MONETARY || category == LC_NUMERIC) { 267 ret = stub_load_locale(new) ? NULL : new; 268 if (!ret) 269 (void)stub_load_locale(old); 270 else 271 (void)strcpy(old, new); 272 return (ret); 273 } 274 275 /* Just in case...*/ 276 return (NULL); 277 } 278 279 static int 280 stub_load_locale(encoding) 281 const char *encoding; 282 { 283 char name[PATH_MAX]; 284 struct stat st; 285 286 if (!encoding) 287 return(1); 288 /* 289 * The "C" and "POSIX" locale are always here. 290 */ 291 if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX")) 292 return(0); 293 if (!_PathLocale) 294 return(1); 295 /* Range checking not needed, encoding has fixed size */ 296 strcpy(name, _PathLocale); 297 strcat(name, "/"); 298 strcat(name, encoding); 299 #if 0 300 /* 301 * Some day we will actually look at this file. 302 */ 303 #endif 304 return (stat(name, &st) != 0 || !S_ISDIR(st.st_mode)); 305 } 306