274 lines
7.1 KiB
C
274 lines
7.1 KiB
C
/* $NetBSD: setlocale.c,v 1.17 1999/10/15 17:17:07 jdolecek Exp $ */
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/*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Paul Borman at Krystal Technologies.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93";
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#else
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__RCSID("$NetBSD: setlocale.c,v 1.17 1999/10/15 17:17:07 jdolecek Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#define _CTYPE_PRIVATE
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#include "namespace.h"
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#include <sys/localedef.h>
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#include <ctype.h>
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#include <limits.h>
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#include <locale.h>
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "ctypeio.h"
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/*
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* Category names for getenv()
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*/
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static const char *const categories[_LC_LAST] = {
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"LC_ALL",
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"LC_COLLATE",
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"LC_CTYPE",
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"LC_MONETARY",
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"LC_NUMERIC",
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"LC_TIME",
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"LC_MESSAGES"
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};
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/*
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* Current locales for each category
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*/
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static char current_categories[_LC_LAST][32] = {
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"C",
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"C",
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"C",
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"C",
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"C",
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"C",
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"C"
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};
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/*
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* The locales we are going to try and load
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*/
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static char new_categories[_LC_LAST][32];
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static char current_locale_string[_LC_LAST * 33];
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static char *PathLocale;
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static char *currentlocale __P((void));
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static char *loadlocale __P((int));
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char *
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setlocale(category, locale)
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int category;
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const char *locale;
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{
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int i;
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size_t len;
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char *env, *r;
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/*
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* XXX potential security problem here with set-id programs
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* being able to read files the user can not normally read.
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*/
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if (!PathLocale && !(PathLocale = getenv("PATH_LOCALE")))
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PathLocale = _PATH_LOCALE;
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if (category < 0 || category >= _LC_LAST)
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return (NULL);
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if (!locale)
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return (category ?
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current_categories[category] : currentlocale());
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/*
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* Default to the current locale for everything.
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*/
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for (i = 1; i < _LC_LAST; ++i)
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(void)strncpy(new_categories[i], current_categories[i],
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sizeof(new_categories[i]) - 1);
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/*
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* Now go fill up new_categories from the locale argument
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*/
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if (!*locale) {
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env = getenv(categories[category]);
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if (!env || !*env)
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env = getenv(categories[0]);
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if (!env || !*env)
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env = getenv("LANG");
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if (!env || !*env)
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env = "C";
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(void)strncpy(new_categories[category], env, 31);
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new_categories[category][31] = 0;
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if (!category) {
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for (i = 1; i < _LC_LAST; ++i) {
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if (!(env = getenv(categories[i])) || !*env)
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env = new_categories[0];
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(void)strncpy(new_categories[i], env, 31);
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new_categories[i][31] = 0;
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}
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}
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} else if (category) {
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(void)strncpy(new_categories[category], locale, 31);
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new_categories[category][31] = 0;
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} else {
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if ((r = strchr(locale, '/')) == 0) {
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for (i = 1; i < _LC_LAST; ++i) {
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(void)strncpy(new_categories[i], locale, 31);
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new_categories[i][31] = 0;
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}
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} else {
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for (i = 1; r[1] == '/'; ++r);
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if (!r[1])
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return (NULL); /* Hmm, just slashes... */
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do {
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len = r - locale > 31 ? 31 : r - locale;
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(void)strncpy(new_categories[i++], locale, len);
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new_categories[i++][len] = 0;
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locale = r;
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while (*locale == '/')
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++locale;
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while (*++r && *r != '/');
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} while (*locale);
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while (i < _LC_LAST)
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(void)strncpy(new_categories[i],
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new_categories[i-1],
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sizeof(new_categories[i]) - 1);
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}
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}
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if (category)
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return (loadlocale(category));
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for (i = 1; i < _LC_LAST; ++i)
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(void) loadlocale(i);
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return (currentlocale());
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}
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static char *
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currentlocale()
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{
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int i;
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(void)strncpy(current_locale_string, current_categories[1],
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sizeof(current_locale_string) - 1);
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for (i = 2; i < _LC_LAST; ++i)
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if (strcmp(current_categories[1], current_categories[i])) {
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(void)snprintf(current_locale_string,
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sizeof(current_locale_string), "%s/%s/%s/%s/%s",
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current_categories[1], current_categories[2],
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current_categories[3], current_categories[4],
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current_categories[5]);
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break;
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}
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return (current_locale_string);
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}
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static char *
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loadlocale(category)
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int category;
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{
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char name[PATH_MAX];
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if (strcmp(new_categories[category], current_categories[category]) == 0)
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return (current_categories[category]);
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if (!strcmp(new_categories[category], "C") ||
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!strcmp(new_categories[category], "POSIX")) {
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switch (category) {
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case LC_CTYPE:
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if (_ctype_ != _C_ctype_) {
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/* LINTED const castaway */
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free((void *)_ctype_);
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_ctype_ = _C_ctype_;
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}
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if (_toupper_tab_ != _C_toupper_) {
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/* LINTED const castaway */
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free((void *)_toupper_tab_);
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_toupper_tab_ = _C_toupper_;
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}
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if (_tolower_tab_ != _C_tolower_) {
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/* LINTED const castaway */
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free((void *)_tolower_tab_);
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_tolower_tab_ = _C_tolower_;
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}
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}
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(void)strncpy(current_categories[category],
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new_categories[category],
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sizeof(current_categories[category]) - 1);
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return current_categories[category];
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}
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/*
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* Some day we will actually look at this file.
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*/
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(void)snprintf(name, sizeof(name), "%s/%s/%s",
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PathLocale, new_categories[category], categories[category]);
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switch (category) {
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case LC_CTYPE:
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if (__loadctype(name)) {
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(void)strncpy(current_categories[category],
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new_categories[category],
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sizeof(current_categories[category]) - 1);
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return current_categories[category];
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}
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return NULL;
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case LC_COLLATE:
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case LC_MESSAGES:
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case LC_MONETARY:
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case LC_NUMERIC:
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case LC_TIME:
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return NULL;
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}
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return NULL;
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}
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