d0d398da1c
Obtained from: NetBSD PR: 62047
337 lines
8.1 KiB
C
337 lines
8.1 KiB
C
/*
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* Copyright (c) 1996 - 2002 FreeBSD Project
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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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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <limits.h>
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#include <locale.h>
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#include <paths.h> /* for _PATH_LOCALE */
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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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#include "collate.h"
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#include "lmonetary.h" /* for __monetary_load_locale() */
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#include "lnumeric.h" /* for __numeric_load_locale() */
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#include "lmessages.h" /* for __messages_load_locale() */
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#include "setlocale.h"
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#include "ldpart.h"
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#include "../stdtime/timelocal.h" /* for __time_load_locale() */
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/*
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* Category names for getenv()
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*/
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static char *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][ENCODING_LEN + 1] = {
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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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* Path to locale storage directory
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*/
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char *_PathLocale;
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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][ENCODING_LEN + 1];
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static char saved_categories[_LC_LAST][ENCODING_LEN + 1];
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static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)];
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static char *currentlocale(void);
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static char *loadlocale(int);
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static const char *__get_locale_env(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, j, len, saverr;
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const char *env, *r;
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if (category < LC_ALL || category >= _LC_LAST) {
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errno = EINVAL;
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return (NULL);
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}
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if (locale == NULL)
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return (category != LC_ALL ?
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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)strcpy(new_categories[i], current_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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if (strlen(env) > ENCODING_LEN) {
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errno = EINVAL;
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return (NULL);
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}
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(void)strcpy(new_categories[i], env);
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}
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} else {
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env = __get_locale_env(category);
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if (strlen(env) > ENCODING_LEN) {
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errno = EINVAL;
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return (NULL);
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}
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(void)strcpy(new_categories[category], env);
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}
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} else if (category != LC_ALL) {
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if (strlen(locale) > ENCODING_LEN) {
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errno = EINVAL;
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return (NULL);
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}
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(void)strcpy(new_categories[category], locale);
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} else {
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if ((r = strchr(locale, '/')) == NULL) {
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if (strlen(locale) > ENCODING_LEN) {
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errno = EINVAL;
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return (NULL);
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}
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for (i = 1; i < _LC_LAST; ++i)
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(void)strcpy(new_categories[i], locale);
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} else {
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for (i = 1; r[1] == '/'; ++r)
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;
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if (!r[1]) {
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errno = EINVAL;
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return (NULL); /* Hmm, just slashes... */
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}
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do {
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if (i == _LC_LAST)
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break; /* Too many slashes... */
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if ((len = r - locale) > ENCODING_LEN) {
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errno = EINVAL;
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return (NULL);
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}
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(void)strlcpy(new_categories[i], locale,
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len + 1);
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i++;
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while (*r == '/')
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r++;
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locale = r;
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while (*r && *r != '/')
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r++;
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} while (*locale);
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while (i < _LC_LAST) {
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(void)strcpy(new_categories[i],
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new_categories[i-1]);
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i++;
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}
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}
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}
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if (category != LC_ALL)
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return (loadlocale(category));
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for (i = 1; i < _LC_LAST; ++i) {
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(void)strcpy(saved_categories[i], current_categories[i]);
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if (loadlocale(i) == NULL) {
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saverr = errno;
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for (j = 1; j < i; j++) {
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(void)strcpy(new_categories[j],
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saved_categories[j]);
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if (loadlocale(j) == NULL) {
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(void)strcpy(new_categories[j], "C");
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(void)loadlocale(j);
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}
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}
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errno = saverr;
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return (NULL);
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}
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}
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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)strcpy(current_locale_string, current_categories[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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for (i = 2; i < _LC_LAST; ++i) {
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(void)strcat(current_locale_string, "/");
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(void)strcat(current_locale_string,
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current_categories[i]);
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}
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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 *new = new_categories[category];
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char *old = current_categories[category];
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int (*func)(const char *);
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int saved_errno;
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if ((new[0] == '.' &&
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(new[1] == '\0' || (new[1] == '.' && new[2] == '\0'))) ||
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strchr(new, '/') != NULL) {
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errno = EINVAL;
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return (NULL);
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}
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saved_errno = errno;
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errno = __detect_path_locale();
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if (errno != 0)
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return (NULL);
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errno = saved_errno;
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switch (category) {
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case LC_CTYPE:
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func = __wrap_setrunelocale;
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break;
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case LC_COLLATE:
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func = __collate_load_tables;
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break;
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case LC_TIME:
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func = __time_load_locale;
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break;
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case LC_NUMERIC:
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func = __numeric_load_locale;
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break;
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case LC_MONETARY:
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func = __monetary_load_locale;
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break;
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case LC_MESSAGES:
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func = __messages_load_locale;
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break;
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default:
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errno = EINVAL;
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return (NULL);
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}
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if (strcmp(new, old) == 0)
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return (old);
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if (func(new) != _LDP_ERROR) {
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(void)strcpy(old, new);
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return (old);
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}
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return (NULL);
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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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/* 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 == NULL || !*env)
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env = getenv(categories[category]);
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/* 3. check LANG */
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if (env == NULL || !*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 == NULL || !*env)
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env = "C";
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return (env);
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}
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/*
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* Detect locale storage location and store its value to _PathLocale variable
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*/
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int
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__detect_path_locale(void)
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{
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if (_PathLocale == NULL) {
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char *p = getenv("PATH_LOCALE");
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if (p != NULL && !issetugid()) {
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if (strlen(p) + 1/*"/"*/ + ENCODING_LEN +
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1/*"/"*/ + CATEGORY_LEN >= PATH_MAX)
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return (ENAMETOOLONG);
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_PathLocale = strdup(p);
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if (_PathLocale == NULL)
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return (errno == 0 ? ENOMEM : errno);
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} else
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_PathLocale = _PATH_LOCALE;
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}
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return (0);
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}
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