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 #ifdef XPG4 100 extern int _xpg4_setrunelocale __P((char *)); 101 #endif 102 103 char * 104 setlocale(category, locale) 105 int category; 106 const char *locale; 107 { 108 int i, j, len; 109 char *env, *r; 110 111 if (category < LC_ALL || category >= _LC_LAST) 112 return (NULL); 113 114 if (!locale) 115 return (category != LC_ALL ? 116 current_categories[category] : currentlocale()); 117 118 /* 119 * Default to the current locale for everything. 120 */ 121 for (i = 1; i < _LC_LAST; ++i) 122 (void)strcpy(new_categories[i], current_categories[i]); 123 124 /* 125 * Now go fill up new_categories from the locale argument 126 */ 127 if (!*locale) { 128 env = getenv(categories[category]); 129 130 if (category != LC_ALL && (!env || !*env)) 131 env = getenv(categories[LC_ALL]); 132 133 if (!env || !*env) 134 env = getenv("LANG"); 135 136 if (!env || !*env) 137 env = "C"; 138 139 (void) strncpy(new_categories[category], env, ENCODING_LEN); 140 new_categories[category][ENCODING_LEN] = '\0'; 141 if (category == LC_ALL) { 142 for (i = 1; i < _LC_LAST; ++i) { 143 if (!(env = getenv(categories[i])) || !*env) 144 env = new_categories[LC_ALL]; 145 (void)strncpy(new_categories[i], env, ENCODING_LEN); 146 new_categories[i][ENCODING_LEN] = '\0'; 147 } 148 } 149 } else if (category != LC_ALL) { 150 (void)strncpy(new_categories[category], locale, ENCODING_LEN); 151 new_categories[category][ENCODING_LEN] = '\0'; 152 } else { 153 if ((r = strchr(locale, '/')) == NULL) { 154 for (i = 1; i < _LC_LAST; ++i) { 155 (void)strncpy(new_categories[i], locale, ENCODING_LEN); 156 new_categories[i][ENCODING_LEN] = '\0'; 157 } 158 } else { 159 for (i = 1; r[1] == '/'; ++r); 160 if (!r[1]) 161 return (NULL); /* Hmm, just slashes... */ 162 do { 163 len = r - locale > ENCODING_LEN ? ENCODING_LEN : r - locale; 164 (void)strncpy(new_categories[i], locale, len); 165 new_categories[i][len] = '\0'; 166 i++; 167 locale = r; 168 while (*locale == '/') 169 ++locale; 170 while (*++r && *r != '/'); 171 } while (*locale); 172 while (i < _LC_LAST) { 173 (void)strcpy(new_categories[i], 174 new_categories[i-1]); 175 i++; 176 } 177 } 178 } 179 180 if (category) 181 return (loadlocale(category)); 182 183 for (i = 1; i < _LC_LAST; ++i) { 184 (void)strcpy(saved_categories[i], current_categories[i]); 185 if (loadlocale(i) == NULL) { 186 for (j = 1; j < i; j++) { 187 (void)strcpy(new_categories[j], 188 saved_categories[j]); 189 /* XXX can fail too */ 190 (void)loadlocale(j); 191 } 192 return (NULL); 193 } 194 } 195 return (currentlocale()); 196 } 197 198 static char * 199 currentlocale() 200 { 201 int i; 202 203 (void)strcpy(current_locale_string, current_categories[1]); 204 205 for (i = 2; i < _LC_LAST; ++i) 206 if (strcmp(current_categories[1], current_categories[i])) { 207 for (i = 2; i < _LC_LAST; ++i) { 208 (void) strcat(current_locale_string, "/"); 209 (void) strcat(current_locale_string, current_categories[i]); 210 } 211 break; 212 } 213 return (current_locale_string); 214 } 215 216 static char * 217 loadlocale(category) 218 int category; 219 { 220 char *ret; 221 char *new = new_categories[category]; 222 char *old = current_categories[category]; 223 224 if (_PathLocale == NULL) { 225 char *p = getenv("PATH_LOCALE"); 226 227 if (p != NULL 228 #ifndef __NETBSD_SYSCALLS 229 && !issetugid() 230 #endif 231 ) { 232 if (strlen(p) + 1/*"/"*/ + ENCODING_LEN + 233 1/*"/"*/ + CATEGORY_LEN >= PATH_MAX) 234 return (NULL); 235 _PathLocale = strdup(p); 236 if (_PathLocale == NULL) 237 return (NULL); 238 } else 239 _PathLocale = _PATH_LOCALE; 240 } 241 242 if (strcmp(new, old) == 0) 243 return (old); 244 245 if (category == LC_CTYPE) { 246 #ifdef XPG4 247 ret = _xpg4_setrunelocale(new) ? NULL : new; 248 #else 249 ret = setrunelocale(new) ? NULL : new; 250 #endif 251 if (!ret) { 252 #ifdef XPG4 253 (void)_xpg4_setrunelocale(old); 254 #else 255 (void)setrunelocale(old); 256 #endif 257 } else 258 (void)strcpy(old, new); 259 return (ret); 260 } 261 262 if (category == LC_COLLATE) { 263 ret = (__collate_load_tables(new) < 0) ? NULL : new; 264 if (!ret) 265 (void)__collate_load_tables(old); 266 else 267 (void)strcpy(old, new); 268 return (ret); 269 } 270 271 if (category == LC_TIME) { 272 ret = (__time_load_locale(new) < 0) ? NULL : new; 273 if (!ret) 274 (void)__time_load_locale(old); 275 else 276 (void)strcpy(old, new); 277 return (ret); 278 } 279 280 if (category == LC_MONETARY || 281 category == LC_MESSAGES || 282 category == LC_NUMERIC) { 283 ret = stub_load_locale(new) ? NULL : new; 284 if (!ret) 285 (void)stub_load_locale(old); 286 else 287 (void)strcpy(old, new); 288 return (ret); 289 } 290 291 /* Just in case...*/ 292 return (NULL); 293 } 294 295 static int 296 stub_load_locale(encoding) 297 const char *encoding; 298 { 299 char name[PATH_MAX]; 300 struct stat st; 301 302 if (!encoding) 303 return(1); 304 /* 305 * The "C" and "POSIX" locale are always here. 306 */ 307 if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX")) 308 return(0); 309 if (!_PathLocale) 310 return(1); 311 /* Range checking not needed, encoding has fixed size */ 312 strcpy(name, _PathLocale); 313 strcat(name, "/"); 314 strcat(name, encoding); 315 #if 0 316 /* 317 * Some day we will actually look at this file. 318 */ 319 #endif 320 return (stat(name, &st) != 0 || !S_ISDIR(st.st_mode)); 321 } 322