348 lines
8.7 KiB
C
348 lines
8.7 KiB
C
/* $NetBSD: setlocale.c,v 1.42 2002/08/07 04:42:42 enami 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 1.42 2002/08/07 04:42:42 enami 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 <sys/types.h>
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#include <sys/stat.h>
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#include <assert.h>
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#include <limits.h>
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#include <ctype.h>
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#define __SETLOCALE_SOURCE__
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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 <unistd.h>
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#ifdef WITH_RUNE
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#include "rune.h"
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#include "rune_local.h"
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#else
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#include "ctypeio.h"
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#endif
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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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char *_PathLocale;
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static char *currentlocale __P((void));
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static char *loadlocale __P((int));
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static const char *__get_locale_env __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, loadlocale_success;
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size_t len;
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const char *env, *r;
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if (issetugid() ||
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(!_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)strlcpy(new_categories[i], current_categories[i],
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sizeof(new_categories[i]));
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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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if (category == LC_ALL) {
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for (i = 1; i < _LC_LAST; ++i) {
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env = __get_locale_env(i);
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(void)strlcpy(new_categories[i], env,
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sizeof(new_categories[i]));
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}
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}
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else {
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env = __get_locale_env(category);
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(void)strlcpy(new_categories[category], env,
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sizeof(new_categories[category]));
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}
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} else if (category) {
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(void)strlcpy(new_categories[category], locale,
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sizeof(new_categories[category]));
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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)strlcpy(new_categories[i], locale,
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sizeof(new_categories[i]));
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}
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} else {
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for (i = 1;;) {
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_DIAGASSERT(*r == '/' || *r == 0);
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_DIAGASSERT(*locale != 0);
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if (*locale == '/')
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return (NULL); /* invalid format. */
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len = r - locale;
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if (len + 1 > sizeof(new_categories[i]))
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return (NULL); /* too long */
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(void)memcpy(new_categories[i], locale, len);
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new_categories[i][len] = '\0';
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if (*r == 0)
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break;
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_DIAGASSERT(*r == '/');
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if (*(locale = ++r) == 0)
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/* slash followed by NUL */
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return (NULL);
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/* skip until NUL or '/' */
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while (*r && *r != '/')
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r++;
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if (++i == _LC_LAST)
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return (NULL); /* too many slashes. */
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}
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if (i + 1 != _LC_LAST)
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return (NULL); /* too few slashes. */
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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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loadlocale_success = 0;
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for (i = 1; i < _LC_LAST; ++i) {
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if (loadlocale(i) != NULL)
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loadlocale_success = 1;
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}
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/*
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* If all categories failed, return NULL; we don't need to back
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* changes off, since none happened.
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*/
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if (!loadlocale_success)
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return NULL;
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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)strlcpy(current_locale_string, current_categories[1],
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sizeof(current_locale_string));
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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/%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], current_categories[6]);
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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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_DIAGASSERT(0 < category && category < _LC_LAST);
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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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#ifdef WITH_RUNE
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(void)_xpg4_setrunelocale("C");
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(void)__runetable_to_netbsd_ctype("C");
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#else
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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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#endif
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}
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(void)strlcpy(current_categories[category],
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new_categories[category],
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sizeof(current_categories[category]));
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return current_categories[category];
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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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#ifdef WITH_RUNE
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if (_xpg4_setrunelocale(new_categories[category]))
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return NULL;
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if (__runetable_to_netbsd_ctype(new_categories[category])) {
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/* very unfortunate, but need to go to "C" locale */
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(void)_xpg4_setrunelocale("C");
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(void)__runetable_to_netbsd_ctype("C");
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return NULL;
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}
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#else
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if (!__loadctype(name))
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return NULL;
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#endif
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break;
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case LC_MESSAGES:
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/*
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* XXX we don't have LC_MESSAGES support yet,
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* but catopen may use the value of LC_MESSAGES category.
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* so return successfully if locale directory is present.
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*/
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(void)snprintf(name, sizeof(name), "%s/%s",
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_PathLocale, new_categories[category]);
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/* local */
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{
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struct stat st;
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if (stat(name, &st) < 0)
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return NULL;
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if (!S_ISDIR(st.st_mode))
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return NULL;
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}
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break;
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case LC_COLLATE:
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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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(void)strlcpy(current_categories[category],
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new_categories[category],
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sizeof(current_categories[category]));
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return current_categories[category];
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}
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static const char *
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__get_locale_env(category)
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int category;
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{
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const char *env;
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_DIAGASSERT(category != LC_ALL);
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/* 1. check LC_ALL. */
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env = getenv(categories[0]);
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/* 2. check LC_* */
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if (!env || !*env)
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env = getenv(categories[category]);
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/* 3. check LANG */
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if (!env || !*env)
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env = getenv("LANG");
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/* 4. if none is set, fall to "C" */
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if (!env || !*env || strchr(env, '/'))
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env = "C";
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return env;
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}
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