/* * Copyright (c) 1991, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Paul Borman at Krystal Technologies. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $Id: setlocale.c,v 1.20 1997/02/22 14:59:56 peter Exp $ */ #ifdef LIBC_RCS static const char rcsid[] = "$Id: setlocale.c,v 1.20 1997/02/22 14:59:56 peter Exp $"; #endif #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93"; #endif /* LIBC_SCCS and not lint */ #include #include #include #include #include #include #include #include #include "collate.h" #include "setlocale.h" /* * Category names for getenv() */ static char *categories[_LC_LAST] = { "LC_ALL", "LC_COLLATE", "LC_CTYPE", "LC_MONETARY", "LC_NUMERIC", "LC_TIME", }; /* * Current locales for each category */ static char current_categories[_LC_LAST][ENCODING_LEN + 1] = { "C", "C", "C", "C", "C", "C", }; /* * The locales we are going to try and load */ static char new_categories[_LC_LAST][ENCODING_LEN + 1]; static char saved_categories[_LC_LAST][ENCODING_LEN + 1]; static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)]; static char *currentlocale __P((void)); static char *loadlocale __P((int)); static int stub_load_locale __P((const char *)); extern int __time_load_locale __P((const char *)); /* strftime.c */ #ifdef XPG4 extern int _xpg4_setrunelocale __P((char *)); #endif char * setlocale(category, locale) int category; const char *locale; { int i, j, len; char *env, *r; if (category < LC_ALL || category >= _LC_LAST) return (NULL); if (!locale) return (category != LC_ALL ? current_categories[category] : currentlocale()); /* * Default to the current locale for everything. */ for (i = 1; i < _LC_LAST; ++i) (void)strcpy(new_categories[i], current_categories[i]); /* * Now go fill up new_categories from the locale argument */ if (!*locale) { env = getenv(categories[category]); if (category != LC_ALL && (!env || !*env)) env = getenv(categories[LC_ALL]); if (!env || !*env) env = getenv("LANG"); if (!env || !*env) env = "C"; (void) strncpy(new_categories[category], env, ENCODING_LEN); new_categories[category][ENCODING_LEN] = '\0'; if (category == LC_ALL) { for (i = 1; i < _LC_LAST; ++i) { if (!(env = getenv(categories[i])) || !*env) env = new_categories[LC_ALL]; (void)strncpy(new_categories[i], env, ENCODING_LEN); new_categories[i][ENCODING_LEN] = '\0'; } } } else if (category != LC_ALL) { (void)strncpy(new_categories[category], locale, ENCODING_LEN); new_categories[category][ENCODING_LEN] = '\0'; } else { if ((r = strchr(locale, '/')) == NULL) { for (i = 1; i < _LC_LAST; ++i) { (void)strncpy(new_categories[i], locale, ENCODING_LEN); new_categories[i][ENCODING_LEN] = '\0'; } } else { for (i = 1; r[1] == '/'; ++r); if (!r[1]) return (NULL); /* Hmm, just slashes... */ do { len = r - locale > ENCODING_LEN ? ENCODING_LEN : r - locale; (void)strncpy(new_categories[i], locale, len); new_categories[i][len] = '\0'; i++; locale = r; while (*locale == '/') ++locale; while (*++r && *r != '/'); } while (*locale); while (i < _LC_LAST) (void)strcpy(new_categories[i], new_categories[i-1]); } } if (category) return (loadlocale(category)); for (i = 1; i < _LC_LAST; ++i) { (void)strcpy(saved_categories[i], current_categories[i]); if (loadlocale(i) == NULL) { for (j = 1; j < i; j++) { (void)strcpy(new_categories[j], saved_categories[j]); /* XXX can fail too */ (void)loadlocale(j); } return (NULL); } } return (currentlocale()); } static char * currentlocale() { int i; (void)strcpy(current_locale_string, current_categories[1]); for (i = 2; i < _LC_LAST; ++i) if (strcmp(current_categories[1], current_categories[i])) { (void) strcpy(current_locale_string, current_categories[1]); (void) strcat(current_locale_string, "/"); (void) strcat(current_locale_string, current_categories[2]); (void) strcat(current_locale_string, "/"); (void) strcat(current_locale_string, current_categories[3]); (void) strcat(current_locale_string, "/"); (void) strcat(current_locale_string, current_categories[4]); (void) strcat(current_locale_string, "/"); (void) strcat(current_locale_string, current_categories[5]); break; } return (current_locale_string); } static char * loadlocale(category) int category; { char *ret; char *new = new_categories[category]; char *old = current_categories[category]; if (_PathLocale == NULL) { char *p = getenv("PATH_LOCALE"); if (p != NULL && !issetugid()) { if (strlen(p) + 1/*"/"*/ + ENCODING_LEN + 1/*"/"*/ + CATEGORY_LEN >= PATH_MAX) return (NULL); _PathLocale = strdup(p); if (_PathLocale == NULL) return (NULL); } else _PathLocale = _PATH_LOCALE; } if (strcmp(new, old) == 0) return (old); if (category == LC_CTYPE) { #ifdef XPG4 ret = _xpg4_setrunelocale(new) ? NULL : new; #else ret = setrunelocale(new) ? NULL : new; #endif if (!ret) { #ifdef XPG4 (void)_xpg4_setrunelocale(old); #else (void)setrunelocale(old); #endif } else (void)strcpy(old, new); return (ret); } if (category == LC_COLLATE) { ret = (__collate_load_tables(new) < 0) ? NULL : new; if (!ret) (void)__collate_load_tables(old); else (void)strcpy(old, new); return (ret); } if (category == LC_TIME) { ret = (__time_load_locale(new) < 0) ? NULL : new; if (!ret) (void)__time_load_locale(old); else (void)strcpy(old, new); return (ret); } if (category == LC_MONETARY || category == LC_NUMERIC) { ret = stub_load_locale(new) ? NULL : new; if (!ret) (void)stub_load_locale(old); else (void)strcpy(old, new); return (ret); } /* Just in case...*/ return (NULL); } static int stub_load_locale(encoding) const char *encoding; { char name[PATH_MAX]; struct stat st; if (!encoding) return(1); /* * The "C" and "POSIX" locale are always here. */ if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX")) return(0); if (!_PathLocale) return(1); /* Range checking not needed, encoding has fixed size */ strcpy(name, _PathLocale); strcat(name, "/"); strcat(name, encoding); #if 0 /* * Some day we will actually look at this file. */ #endif return (stat(name, &st) != 0 || !S_ISDIR(st.st_mode)); }