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 "LC_MESSAGES", 70 }; 71 72 /* 73 * Current locales for each category 74 */ 75 static char current_categories[_LC_LAST][ENCODING_LEN + 1] = { 76 "C", 77 "C", 78 "C", 79 "C", 80 "C", 81 "C", 82 "C", 83 }; 84 85 /* 86 * The locales we are going to try and load 87 */ 88 static char new_categories[_LC_LAST][ENCODING_LEN + 1]; 89 static char saved_categories[_LC_LAST][ENCODING_LEN + 1]; 90 91 static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)]; 92 93 static char *currentlocale __P((void)); 94 static char *loadlocale __P((int)); 95 static int stub_load_locale __P((const char *)); 96 97 extern int __time_load_locale __P((const char *)); /* strftime.c */ 98 99 char * 100 setlocale(category, locale) 101 int category; 102 const char *locale; 103 { 104 int i, j, len; 105 char *env, *r; 106 107 if (category < LC_ALL || category >= _LC_LAST) 108 return (NULL); 109 110 if (!locale) 111 return (category != LC_ALL ? 112 current_categories[category] : currentlocale()); 113 114 /* 115 * Default to the current locale for everything. 116 */ 117 for (i = 1; i < _LC_LAST; ++i) 118 (void)strcpy(new_categories[i], current_categories[i]); 119 120 /* 121 * Now go fill up new_categories from the locale argument 122 */ 123 if (!*locale) { 124 env = getenv(categories[category]); 125 126 if (category != LC_ALL && (!env || !*env)) 127 env = getenv(categories[LC_ALL]); 128 129 if (!env || !*env) 130 env = getenv("LANG"); 131 132 if (!env || !*env || strchr(env, '/')) 133 env = "C"; 134 135 (void) strncpy(new_categories[category], env, ENCODING_LEN); 136 new_categories[category][ENCODING_LEN] = '\0'; 137 if (category == LC_ALL) { 138 for (i = 1; i < _LC_LAST; ++i) { 139 if (!(env = getenv(categories[i])) || !*env) 140 env = new_categories[LC_ALL]; 141 (void)strncpy(new_categories[i], env, ENCODING_LEN); 142 new_categories[i][ENCODING_LEN] = '\0'; 143 } 144 } 145 } else if (category != LC_ALL) { 146 (void)strncpy(new_categories[category], locale, ENCODING_LEN); 147 new_categories[category][ENCODING_LEN] = '\0'; 148 } else { 149 if ((r = strchr(locale, '/')) == NULL) { 150 for (i = 1; i < _LC_LAST; ++i) { 151 (void)strncpy(new_categories[i], locale, ENCODING_LEN); 152 new_categories[i][ENCODING_LEN] = '\0'; 153 } 154 } else { 155 for (i = 1; r[1] == '/'; ++r); 156 if (!r[1]) 157 return (NULL); /* Hmm, just slashes... */ 158 do { 159 len = r - locale > ENCODING_LEN ? ENCODING_LEN : r - locale; 160 (void)strncpy(new_categories[i], locale, len); 161 new_categories[i][len] = '\0'; 162 i++; 163 locale = r; 164 while (*locale == '/') 165 ++locale; 166 while (*++r && *r != '/'); 167 } while (*locale); 168 while (i < _LC_LAST) { 169 (void)strcpy(new_categories[i], 170 new_categories[i-1]); 171 i++; 172 } 173 } 174 } 175 176 if (category != LC_ALL) 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 for (i = 2; i < _LC_LAST; ++i) { 204 (void) strcat(current_locale_string, "/"); 205 (void) strcat(current_locale_string, current_categories[i]); 206 } 207 break; 208 } 209 return (current_locale_string); 210 } 211 212 static char * 213 loadlocale(category) 214 int category; 215 { 216 char *ret; 217 char *new = new_categories[category]; 218 char *old = current_categories[category]; 219 220 if (_PathLocale == NULL) { 221 char *p = getenv("PATH_LOCALE"); 222 223 if (p != NULL 224 #ifndef __NETBSD_SYSCALLS 225 && !issetugid() 226 #endif 227 ) { 228 if (strlen(p) + 1/*"/"*/ + ENCODING_LEN + 229 1/*"/"*/ + CATEGORY_LEN >= PATH_MAX) 230 return (NULL); 231 _PathLocale = strdup(p); 232 if (_PathLocale == NULL) 233 return (NULL); 234 } else 235 _PathLocale = _PATH_LOCALE; 236 } 237 238 if (strcmp(new, old) == 0) 239 return (old); 240 241 if (category == LC_CTYPE) { 242 ret = setrunelocale(new) ? NULL : new; 243 if (!ret) 244 (void)setrunelocale(old); 245 else 246 (void)strcpy(old, new); 247 return (ret); 248 } 249 250 if (category == LC_COLLATE) { 251 ret = (__collate_load_tables(new) < 0) ? NULL : new; 252 if (!ret) 253 (void)__collate_load_tables(old); 254 else 255 (void)strcpy(old, new); 256 return (ret); 257 } 258 259 if (category == LC_TIME) { 260 ret = (__time_load_locale(new) < 0) ? NULL : new; 261 if (!ret) 262 (void)__time_load_locale(old); 263 else 264 (void)strcpy(old, new); 265 return (ret); 266 } 267 268 if (category == LC_MONETARY || 269 category == LC_MESSAGES || 270 category == LC_NUMERIC) { 271 ret = stub_load_locale(new) ? NULL : new; 272 if (!ret) 273 (void)stub_load_locale(old); 274 else 275 (void)strcpy(old, new); 276 return (ret); 277 } 278 279 /* Just in case...*/ 280 return (NULL); 281 } 282 283 static int 284 stub_load_locale(encoding) 285 const char *encoding; 286 { 287 char name[PATH_MAX]; 288 struct stat st; 289 290 if (!encoding) 291 return(1); 292 /* 293 * The "C" and "POSIX" locale are always here. 294 */ 295 if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX")) 296 return(0); 297 if (!_PathLocale) 298 return(1); 299 /* Range checking not needed, encoding has fixed size */ 300 strcpy(name, _PathLocale); 301 strcat(name, "/"); 302 strcat(name, encoding); 303 #if 0 304 /* 305 * Some day we will actually look at this file. 306 */ 307 #endif 308 return (stat(name, &st) != 0 || !S_ISDIR(st.st_mode)); 309 } 310