a1158cce42
be used to point to a bad locale file. This is only believed to be a minor security risk - the only risk is if some program uses the result of a localized string as a format specifier in a vulnerable function like sprintf(). No such code is believed to exist in the FreeBSD base system, although it is possible that badly written third party code would do that. Submitted by: imp Approved by: ache
310 lines
7.7 KiB
C
310 lines
7.7 KiB
C
/*
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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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* $FreeBSD$
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*/
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#ifdef LIBC_RCS
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static const char rcsid[] =
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"$FreeBSD$";
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#endif
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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/types.h>
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#include <sys/stat.h>
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#include <limits.h>
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#include <locale.h>
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#include <rune.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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#include "collate.h"
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#include "setlocale.h"
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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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* 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 __P((void));
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static char *loadlocale __P((int));
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static int stub_load_locale __P((const char *));
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extern int __time_load_locale __P((const char *)); /* strftime.c */
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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;
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char *env, *r;
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if (category < LC_ALL || category >= _LC_LAST)
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return (NULL);
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if (!locale)
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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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env = getenv(categories[category]);
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if (category != LC_ALL && (!env || !*env))
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env = getenv(categories[LC_ALL]);
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if (!env || !*env)
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env = getenv("LANG");
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if (!env || !*env || strchr(env, '/'))
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env = "C";
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(void) strncpy(new_categories[category], env, ENCODING_LEN);
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new_categories[category][ENCODING_LEN] = '\0';
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if (category == LC_ALL) {
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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[LC_ALL];
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(void)strncpy(new_categories[i], env, ENCODING_LEN);
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new_categories[i][ENCODING_LEN] = '\0';
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}
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}
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} else if (category != LC_ALL) {
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(void)strncpy(new_categories[category], locale, ENCODING_LEN);
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new_categories[category][ENCODING_LEN] = '\0';
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} else {
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if ((r = strchr(locale, '/')) == NULL) {
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for (i = 1; i < _LC_LAST; ++i) {
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(void)strncpy(new_categories[i], locale, ENCODING_LEN);
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new_categories[i][ENCODING_LEN] = '\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 > ENCODING_LEN ? ENCODING_LEN : 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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i++;
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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)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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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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/* XXX can fail too */
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(void)loadlocale(j);
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}
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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, 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 *ret;
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char *new = new_categories[category];
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char *old = current_categories[category];
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if (_PathLocale == NULL) {
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char *p = getenv("PATH_LOCALE");
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if (p != NULL
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#ifndef __NETBSD_SYSCALLS
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&& !issetugid()
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#endif
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) {
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if (strlen(p) + 1/*"/"*/ + ENCODING_LEN +
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1/*"/"*/ + CATEGORY_LEN >= PATH_MAX)
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return (NULL);
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_PathLocale = strdup(p);
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if (_PathLocale == NULL)
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return (NULL);
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} else
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_PathLocale = _PATH_LOCALE;
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}
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if (strcmp(new, old) == 0)
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return (old);
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if (category == LC_CTYPE) {
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ret = setrunelocale(new) ? NULL : new;
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if (!ret)
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(void)setrunelocale(old);
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else
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(void)strcpy(old, new);
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return (ret);
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}
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if (category == LC_COLLATE) {
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ret = (__collate_load_tables(new) < 0) ? NULL : new;
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if (!ret)
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(void)__collate_load_tables(old);
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else
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(void)strcpy(old, new);
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return (ret);
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}
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if (category == LC_TIME) {
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ret = (__time_load_locale(new) < 0) ? NULL : new;
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if (!ret)
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(void)__time_load_locale(old);
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else
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(void)strcpy(old, new);
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return (ret);
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}
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if (category == LC_MONETARY ||
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category == LC_MESSAGES ||
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category == LC_NUMERIC) {
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ret = stub_load_locale(new) ? NULL : new;
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if (!ret)
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(void)stub_load_locale(old);
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else
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(void)strcpy(old, new);
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return (ret);
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}
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/* Just in case...*/
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return (NULL);
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}
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static int
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stub_load_locale(encoding)
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const char *encoding;
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{
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char name[PATH_MAX];
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struct stat st;
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if (!encoding)
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return(1);
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/*
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* The "C" and "POSIX" locale are always here.
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*/
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if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX"))
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return(0);
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if (!_PathLocale)
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return(1);
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/* Range checking not needed, encoding has fixed size */
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strcpy(name, _PathLocale);
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strcat(name, "/");
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strcat(name, encoding);
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#if 0
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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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#endif
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return (stat(name, &st) != 0 || !S_ISDIR(st.st_mode));
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}
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