/* $OpenBSD: setlocale.c,v 1.11 2003/06/02 20:18:35 millert Exp $ */ /* * 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. 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. */ #if defined(LIBC_SCCS) && !defined(lint) static char rcsid[] = "$OpenBSD: setlocale.c,v 1.11 2003/06/02 20:18:35 millert Exp $"; #endif /* LIBC_SCCS and not lint */ #include #include #include #include #include #include #include #include /* * Category names for getenv() */ static char *categories[_LC_LAST] = { "LC_ALL", "LC_COLLATE", "LC_CTYPE", "LC_MONETARY", "LC_NUMERIC", "LC_TIME", "LC_MESSAGES" }; /* * Current locales for each category */ static char current_categories[_LC_LAST][32] = { "C", "C", "C", "C", "C", "C", "C" }; /* * The locales we are going to try and load */ static char new_categories[_LC_LAST][32]; static char current_locale_string[_LC_LAST * 33]; static char *PathLocale; static char *currentlocale(void); static char *loadlocale(int); static const char *__get_locale_env __P((int)); char * setlocale(category, locale) int category; const char *locale; { int i, loadlocale_success; size_t len; const char *env, *r; if (issetugid() != 0 || ((!PathLocale && !(PathLocale = getenv("PATH_LOCALE"))) || !*PathLocale)) PathLocale = _PATH_LOCALE; if (category < 0 || category >= _LC_LAST) return (NULL); if (!locale) return (category ? current_categories[category] : currentlocale()); /* * Default to the current locale for everything. */ for (i = 1; i < _LC_LAST; ++i) (void)strlcpy(new_categories[i], current_categories[i], sizeof(new_categories[i])); /* * Now go fill up new_categories from the locale argument */ if (!*locale) { if (category == LC_ALL) { for (i = 1; i < _LC_LAST; ++i) { env = __get_locale_env(i); (void)strlcpy(new_categories[i], env, sizeof(new_categories[i])); } } else { env = __get_locale_env(category); (void)strlcpy(new_categories[category], env, sizeof(new_categories[category])); } } else if (category) { (void)strlcpy(new_categories[category], locale, sizeof(new_categories[category])); } else { if ((r = strchr(locale, '/')) == 0) { for (i = 1; i < _LC_LAST; ++i) { (void)strlcpy(new_categories[i], locale, sizeof(new_categories[i])); } } else { for (i = 1;;) { if (*locale == '/') return (NULL); /* invalid format. */ len = r - locale; if (len + 1 > sizeof(new_categories[i])) return (NULL); /* too long */ (void)memcpy(new_categories[i], locale, len); new_categories[i][len] = '\0'; if (*r == 0) break; if (*(locale = ++r) == 0) /* slash followed by NUL */ return (NULL); /* skip until NUL or '/' */ while (*r && *r != '/') r++; if (++i == _LC_LAST) return (NULL); /* too many slashes. */ } if (i + 1 != _LC_LAST) return (NULL); /* too few slashes. */ } } if (category) return (loadlocale(category)); loadlocale_success = 0; for (i = 1; i < _LC_LAST; ++i) { if (loadlocale(i) != NULL) loadlocale_success = 1; } /* * If all categories failed, return NULL; we don't need to back * changes off, since none happened. */ if (!loadlocale_success) return NULL; return (currentlocale()); } static char * currentlocale() { int i; (void)strlcpy(current_locale_string, current_categories[1], sizeof(current_locale_string)); for (i = 2; i < _LC_LAST; ++i) if (strcmp(current_categories[1], current_categories[i])) { (void)snprintf(current_locale_string, sizeof(current_locale_string), "%s/%s/%s/%s/%s/%s", current_categories[1], current_categories[2], current_categories[3], current_categories[4], current_categories[5], current_categories[6]); break; } return (current_locale_string); } static char * loadlocale(category) int category; { char name[PATH_MAX]; if (strcmp(new_categories[category], current_categories[category]) == 0) return (current_categories[category]); if (!strcmp(new_categories[category], "C") || !strcmp(new_categories[category], "POSIX")) { /* * Some day this will need to reset the locale to the default * C locale. Since we have no way to change them as of yet, * there is no need to reset them. */ (void)strlcpy(current_categories[category], new_categories[category], sizeof(current_categories[category])); return (current_categories[category]); } /* * Some day we will actually look at this file. */ (void)snprintf(name, sizeof(name), "%s/%s/%s", PathLocale, new_categories[category], categories[category]); switch (category) { case LC_CTYPE: case LC_COLLATE: case LC_MESSAGES: case LC_MONETARY: case LC_NUMERIC: case LC_TIME: return (NULL); } (void)strlcpy(current_categories[category], new_categories[category], sizeof(current_categories[category])); return current_categories[category]; } static const char * __get_locale_env(category) int category; { const char *env; /* 1. check LC_ALL. */ env = getenv(categories[0]); /* 2. check LC_* */ if (!env || !*env) env = getenv(categories[category]); /* 3. check LANG */ if (!env || !*env) env = getenv("LANG"); /* 4. if none is set, fall to "C" */ if (!env || !*env || strchr(env, '/')) env = "C"; return env; }