setlocale.c revision 22288
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: head/lib/libc/locale/setlocale.c 22288 1997-02-05 09:53:25Z dg $ 37 */ 38 39#ifdef LIBC_RCS 40static const char rcsid[] = 41 "$FreeBSD: head/lib/libc/locale/setlocale.c 22288 1997-02-05 09:53:25Z dg $"; 42#endif 43 44#if defined(LIBC_SCCS) && !defined(lint) 45static 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 58/* 59 * Category names for getenv() 60 */ 61static char *categories[_LC_LAST] = { 62 "LC_ALL", 63 "LC_COLLATE", 64 "LC_CTYPE", 65 "LC_MONETARY", 66 "LC_NUMERIC", 67 "LC_TIME", 68}; 69 70/* 71 * Current locales for each category 72 */ 73static char current_categories[_LC_LAST][32] = { 74 "C", 75 "C", 76 "C", 77 "C", 78 "C", 79 "C", 80}; 81 82/* 83 * The locales we are going to try and load 84 */ 85static char new_categories[_LC_LAST][32]; 86static char saved_categories[_LC_LAST][32]; 87 88static char current_locale_string[_LC_LAST * 33]; 89char *_PathLocale; 90 91static char *currentlocale __P((void)); 92static char *loadlocale __P((int)); 93static int stub_load_locale __P((const char *)); 94 95extern int __time_load_locale __P((const char *)); /* strftime.c */ 96 97#ifdef XPG4 98extern int _xpg4_setrunelocale __P((char *)); 99#endif 100 101char * 102setlocale(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, 31); 138 new_categories[category][31] = 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, 31); 144 new_categories[i][31] = 0; 145 } 146 } 147 } else if (category != LC_ALL) { 148 (void)strncpy(new_categories[category], locale, 31); 149 new_categories[category][31] = 0; 150 } else { 151 if ((r = strchr(locale, '/')) == 0) { 152 for (i = 1; i < _LC_LAST; ++i) { 153 (void)strncpy(new_categories[i], locale, 31); 154 new_categories[i][31] = 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 > 31 ? 31 : r - locale; 162 (void)strncpy(new_categories[i++], locale, len); 163 new_categories[i++][len] = 0; 164 locale = r; 165 while (*locale == '/') 166 ++locale; 167 while (*++r && *r != '/'); 168 } while (*locale); 169 while (i < _LC_LAST) 170 (void)strcpy(new_categories[i], 171 new_categories[i-1]); 172 } 173 } 174 175 if (category) 176 return (loadlocale(category)); 177 178 for (i = 1; i < _LC_LAST; ++i) { 179 (void)strcpy(saved_categories[i], current_categories[i]); 180 if (loadlocale(i) == NULL) { 181 for (j = 1; j < i; j++) { 182 (void)strcpy(new_categories[j], 183 saved_categories[j]); 184 /* XXX can fail too */ 185 (void)loadlocale(j); 186 } 187 return (NULL); 188 } 189 } 190 return (currentlocale()); 191} 192 193/* To be compatible with crt0 hack */ 194void 195_startup_setlocale(category, locale) 196 int category; 197 const char *locale; 198{ 199#ifndef XPG4 200 (void) setlocale(category, locale); 201#endif 202} 203 204static char * 205currentlocale() 206{ 207 int i; 208 209 (void)strcpy(current_locale_string, current_categories[1]); 210 211 for (i = 2; i < _LC_LAST; ++i) 212 if (strcmp(current_categories[1], current_categories[i])) { 213 (void) strcpy(current_locale_string, current_categories[1]); 214 (void) strcat(current_locale_string, "/"); 215 (void) strcat(current_locale_string, current_categories[2]); 216 (void) strcat(current_locale_string, "/"); 217 (void) strcat(current_locale_string, current_categories[3]); 218 (void) strcat(current_locale_string, "/"); 219 (void) strcat(current_locale_string, current_categories[4]); 220 (void) strcat(current_locale_string, "/"); 221 (void) strcat(current_locale_string, current_categories[5]); 222 break; 223 } 224 return (current_locale_string); 225} 226 227static char * 228loadlocale(category) 229 int category; 230{ 231 char *ret; 232 char *new = new_categories[category]; 233 char *old = current_categories[category]; 234 235 if (!_PathLocale) 236 _PathLocale = _PATH_LOCALE; 237 238 if (strcmp(new, old) == 0) 239 return (old); 240 241 if (category == LC_CTYPE) { 242#ifdef XPG4 243 ret = _xpg4_setrunelocale(new) ? NULL : new; 244#else 245 ret = setrunelocale(new) ? NULL : new; 246#endif 247 if (!ret) { 248#ifdef XPG4 249 (void)_xpg4_setrunelocale(old); 250#else 251 (void)setrunelocale(old); 252#endif 253 } else 254 (void)strcpy(old, new); 255 return (ret); 256 } 257 258 if (category == LC_COLLATE) { 259 ret = (__collate_load_tables(new) < 0) ? NULL : new; 260 if (!ret) 261 (void)__collate_load_tables(old); 262 else 263 (void)strcpy(old, new); 264 return (ret); 265 } 266 267 if (category == LC_TIME) { 268 ret = (__time_load_locale(new) < 0) ? NULL : new; 269 if (!ret) 270 (void)__time_load_locale(old); 271 else 272 (void)strcpy(old, new); 273 return (ret); 274 } 275 276 if (category == LC_MONETARY || category == LC_NUMERIC) { 277 ret = stub_load_locale(new) ? NULL : new; 278 if (!ret) 279 (void)stub_load_locale(old); 280 else 281 (void)strcpy(old, new); 282 return (ret); 283 } 284 285 /* Just in case...*/ 286 return (NULL); 287} 288 289static int 290stub_load_locale(encoding) 291const char *encoding; 292{ 293 char name[PATH_MAX]; 294 struct stat st; 295 296 if (!encoding) 297 return(1); 298 /* 299 * The "C" and "POSIX" locale are always here. 300 */ 301 if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX")) 302 return(0); 303 if (!_PathLocale) 304 return(1); 305 /* Range checking already done at upper level caller */ 306 strcpy(name, _PathLocale); 307 strcat(name, "/"); 308 strcat(name, encoding); 309#if 0 310 /* 311 * Some day we will actually look at this file. 312 */ 313#endif 314 return (stat(name, &st) != 0 || !S_ISDIR(st.st_mode)); 315} 316