317 lines
8.2 KiB
C
317 lines
8.2 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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* $Id: setlocale.c,v 1.20 1997/02/22 14:59:56 peter Exp $
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*/
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#ifdef LIBC_RCS
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static const char rcsid[] =
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"$Id: setlocale.c,v 1.20 1997/02/22 14:59:56 peter Exp $";
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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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};
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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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};
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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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#ifdef XPG4
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extern int _xpg4_setrunelocale __P((char *));
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#endif
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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)
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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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}
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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)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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(void) strcpy(current_locale_string, current_categories[1]);
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(void) strcat(current_locale_string, "/");
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(void) strcat(current_locale_string, current_categories[2]);
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(void) strcat(current_locale_string, "/");
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(void) strcat(current_locale_string, current_categories[3]);
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(void) strcat(current_locale_string, "/");
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(void) strcat(current_locale_string, current_categories[4]);
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(void) strcat(current_locale_string, "/");
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(void) strcat(current_locale_string, 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 *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 && !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 (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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#ifdef XPG4
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ret = _xpg4_setrunelocale(new) ? NULL : new;
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#else
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ret = setrunelocale(new) ? NULL : new;
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#endif
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if (!ret) {
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#ifdef XPG4
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(void)_xpg4_setrunelocale(old);
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#else
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(void)setrunelocale(old);
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#endif
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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 || 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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