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 } 176 } 177 178 if (category) 179 return (loadlocale(category)); 180 181 for (i = 1; i < _LC_LAST; ++i) { 182 (void)strcpy(saved_categories[i], current_categories[i]); 183 if (loadlocale(i) == NULL) { 184 for (j = 1; j < i; j++) { 185 (void)strcpy(new_categories[j], 186 saved_categories[j]); 187 /* XXX can fail too */ 188 (void)loadlocale(j); 189 } 190 return (NULL); 191 } 192 } 193 return (currentlocale()); 194 } 195 196 static char * 197 currentlocale() 198 { 199 int i; 200 201 (void)strcpy(current_locale_string, current_categories[1]); 202 203 for (i = 2; i < _LC_LAST; ++i) 204 if (strcmp(current_categories[1], current_categories[i])) { 205 for (i = 2; i < _LC_LAST; ++i) { 206 (void) strcat(current_locale_string, "/"); 207 (void) strcat(current_locale_string, current_categories[i]); 208 } 209 break; 210 } 211 return (current_locale_string); 212 } 213 214 static char * 215 loadlocale(category) 216 int category; 217 { 218 char *ret; 219 char *new = new_categories[category]; 220 char *old = current_categories[category]; 221 222 if (_PathLocale == NULL) { 223 char *p = getenv("PATH_LOCALE"); 224 225 if (p != NULL 226 #ifndef __NETBSD_SYSCALLS 227 && !issetugid() 228 #endif 229 ) { 230 if (strlen(p) + 1/*"/"*/ + ENCODING_LEN + 231 1/*"/"*/ + CATEGORY_LEN >= PATH_MAX) 232 return (NULL); 233 _PathLocale = strdup(p); 234 if (_PathLocale == NULL) 235 return (NULL); 236 } else 237 _PathLocale = _PATH_LOCALE; 238 } 239 240 if (strcmp(new, old) == 0) 241 return (old); 242 243 if (category == LC_CTYPE) { 244 #ifdef XPG4 245 ret = _xpg4_setrunelocale(new) ? NULL : new; 246 #else 247 ret = setrunelocale(new) ? NULL : new; 248 #endif 249 if (!ret) { 250 #ifdef XPG4 251 (void)_xpg4_setrunelocale(old); 252 #else 253 (void)setrunelocale(old); 254 #endif 255 } else 256 (void)strcpy(old, new); 257 return (ret); 258 } 259 260 if (category == LC_COLLATE) { 261 ret = (__collate_load_tables(new) < 0) ? NULL : new; 262 if (!ret) 263 (void)__collate_load_tables(old); 264 else 265 (void)strcpy(old, new); 266 return (ret); 267 } 268 269 if (category == LC_TIME) { 270 ret = (__time_load_locale(new) < 0) ? NULL : new; 271 if (!ret) 272 (void)__time_load_locale(old); 273 else 274 (void)strcpy(old, new); 275 return (ret); 276 } 277 278 if (category == LC_MONETARY || 279 category == LC_MESSAGES || 280 category == LC_NUMERIC) { 281 ret = stub_load_locale(new) ? NULL : new; 282 if (!ret) 283 (void)stub_load_locale(old); 284 else 285 (void)strcpy(old, new); 286 return (ret); 287 } 288 289 /* Just in case...*/ 290 return (NULL); 291 } 292 293 static int 294 stub_load_locale(encoding) 295 const char *encoding; 296 { 297 char name[PATH_MAX]; 298 struct stat st; 299 300 if (!encoding) 301 return(1); 302 /* 303 * The "C" and "POSIX" locale are always here. 304 */ 305 if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX")) 306 return(0); 307 if (!_PathLocale) 308 return(1); 309 /* Range checking not needed, encoding has fixed size */ 310 strcpy(name, _PathLocale); 311 strcat(name, "/"); 312 strcat(name, encoding); 313 #if 0 314 /* 315 * Some day we will actually look at this file. 316 */ 317 #endif 318 return (stat(name, &st) != 0 || !S_ISDIR(st.st_mode)); 319 } 320