/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1996 - 2002 FreeBSD Project
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Paul Borman at Krystal Technologies.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <limits.h>
#include <locale.h>
#include <paths.h> /* for _PATH_LOCALE */
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "collate.h"
#include "lmonetary.h" /* for __monetary_load_locale() */
#include "lnumeric.h" /* for __numeric_load_locale() */
#include "lmessages.h" /* for __messages_load_locale() */
#include "setlocale.h"
#include "ldpart.h"
#include "../stdtime/timelocal.h" /* for __time_load_locale() */
/*
* Category names for getenv()
*/
static const char categories[_LC_LAST][12] = {
"LC_ALL",
"LC_COLLATE",
"LC_CTYPE",
"LC_MONETARY",
"LC_NUMERIC",
"LC_TIME",
"LC_MESSAGES",
};
/*
* Current locales for each category
*/
static char current_categories[_LC_LAST][ENCODING_LEN + 1] = {
"C",
"C",
"C",
"C",
"C",
"C",
"C",
};
/*
* Path to locale storage directory
*/
char *_PathLocale;
/*
* The locales we are going to try and load
*/
static char new_categories[_LC_LAST][ENCODING_LEN + 1];
static char saved_categories[_LC_LAST][ENCODING_LEN + 1];
static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)];
static char *currentlocale(void);
static char *loadlocale(int);
const char *__get_locale_env(int);
char *
setlocale(int category, const char *locale)
{
int i, j, len, saverr;
const char *env, *r;
if (category < LC_ALL || category >= _LC_LAST) {
errno = EINVAL;
return (NULL);
}
if (locale == NULL)
return (category != LC_ALL ?
current_categories[category] : currentlocale());
/*
* Default to the current locale for everything.
*/
for (i = 1; i < _LC_LAST; ++i)
(void)strcpy(new_categories[i], current_categories[i]);
/*
* Now go fill up new_categories from the locale argument
*/
if (!*locale) {
if (category == LC_ALL) {
for (i = 1; i < _LC_LAST; ++i) {
env = __get_locale_env(i);
if (strlen(env) > ENCODING_LEN) {
errno = EINVAL;
return (NULL);
}
(void)strcpy(new_categories[i], env);
}
} else {
env = __get_locale_env(category);
if (strlen(env) > ENCODING_LEN) {
errno = EINVAL;
return (NULL);
}
(void)strcpy(new_categories[category], env);
}
} else if (category != LC_ALL) {
if (strlen(locale) > ENCODING_LEN) {
errno = EINVAL;
return (NULL);
}
(void)strcpy(new_categories[category], locale);
} else {
if ((r = strchr(locale, '/')) == NULL) {
if (strlen(locale) > ENCODING_LEN) {
errno = EINVAL;
return (NULL);
}
for (i = 1; i < _LC_LAST; ++i)
(void)strcpy(new_categories[i], locale);
} else {
for (i = 1; r[1] == '/'; ++r)
;
if (!r[1]) {
errno = EINVAL;
return (NULL); /* Hmm, just slashes... */
}
do {
if (i == _LC_LAST)
break; /* Too many slashes... */
if ((len = r - locale) > ENCODING_LEN) {
errno = EINVAL;
return (NULL);
}
(void)strlcpy(new_categories[i], locale,
len + 1);
i++;
while (*r == '/')
r++;
locale = r;
while (*r && *r != '/')
r++;
} while (*locale);
while (i < _LC_LAST) {
(void)strcpy(new_categories[i],
new_categories[i - 1]);
i++;
}
}
}
if (category != LC_ALL)
return (loadlocale(category));
for (i = 1; i < _LC_LAST; ++i) {
(void)strcpy(saved_categories[i], current_categories[i]);
if (loadlocale(i) == NULL) {
saverr = errno;
for (j = 1; j < i; j++) {
(void)strcpy(new_categories[j],
saved_categories[j]);
if (loadlocale(j) == NULL) {
(void)strcpy(new_categories[j], "C");
(void)loadlocale(j);
}
}
errno = saverr;
return (NULL);
}
}
return (currentlocale());
}
static char *
currentlocale(void)
{
int i;
(void)strcpy(current_locale_string, current_categories[1]);
for (i = 2; i < _LC_LAST; ++i)
if (strcmp(current_categories[1], current_categories[i])) {
for (i = 2; i < _LC_LAST; ++i) {
(void)strcat(current_locale_string, "/");
(void)strcat(current_locale_string,
current_categories[i]);
}
break;
}
return (current_locale_string);
}
static char *
loadlocale(int category)
{
char *new = new_categories[category];
char *old = current_categories[category];
int (*func) (const char *);
int saved_errno;
if ((new[0] == '.' &&
(new[1] == '\0' || (new[1] == '.' && new[2] == '\0'))) ||
strchr(new, '/') != NULL) {
errno = EINVAL;
return (NULL);
}
saved_errno = errno;
errno = __detect_path_locale();
if (errno != 0)
return (NULL);
errno = saved_errno;
switch (category) {
case LC_CTYPE:
func = __wrap_setrunelocale;
break;
case LC_COLLATE:
func = __collate_load_tables;
break;
case LC_TIME:
func = __time_load_locale;
break;
case LC_NUMERIC:
func = __numeric_load_locale;
break;
case LC_MONETARY:
func = __monetary_load_locale;
break;
case LC_MESSAGES:
func = __messages_load_locale;
break;
default:
errno = EINVAL;
return (NULL);
}
if (strcmp(new, old) == 0)
return (old);
if (func(new) != _LDP_ERROR) {
(void)strcpy(old, new);
(void)strcpy(__xlocale_global_locale.components[category-1]->locale, new);
return (old);
}
return (NULL);
}
const char *
__get_locale_env(int category)
{
const char *env;
/* 1. check LC_ALL. */
env = getenv(categories[0]);
/* 2. check LC_* */
if (env == NULL || !*env)
env = getenv(categories[category]);
/* 3. check LANG */
if (env == NULL || !*env)
env = getenv("LANG");
/* 4. if none is set, fall to "C" */
if (env == NULL || !*env)
env = "C";
return (env);
}
/*
* Detect locale storage location and store its value to _PathLocale variable
*/
int
__detect_path_locale(void)
{
if (_PathLocale == NULL) {
char *p = getenv("PATH_LOCALE");
if (p != NULL && !issetugid()) {
if (strlen(p) + 1/*"/"*/ + ENCODING_LEN +
1/*"/"*/ + CATEGORY_LEN >= PATH_MAX)
return (ENAMETOOLONG);
_PathLocale = strdup(p);
if (_PathLocale == NULL)
return (errno == 0 ? ENOMEM : errno);
} else
_PathLocale = _PATH_LOCALE;
}
return (0);
}
