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setlocale.c revision 1.57 
      1 /* $NetBSD: setlocale.c,v 1.57 2009/03/09 02:22:25 tnozaki Exp $ */
      2 
      3 /*-
      4  * Copyright (c)2008 Citrus Project,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 #if defined(LIBC_SCCS) && !defined(lint)
     31 __RCSID("$NetBSD: setlocale.c,v 1.57 2009/03/09 02:22:25 tnozaki Exp $");
     32 #endif /* LIBC_SCCS and not lint */
     33 
     34 #include <sys/cdefs.h>
     35 #include <sys/types.h>
     36 #include <langinfo.h>
     37 #define __SETLOCALE_SOURCE__
     38 #include <locale.h>
     39 #include <paths.h>
     40 #include <stdlib.h>
     41 #include <string.h>
     42 #include <unistd.h>
     43 
     44 #include "setlocale_local.h"
     45 
     46 const char *_PathLocale = NULL;
     47 
     48 __link_set_decl(all_categories, _locale_category_t);
     49 
     50 extern const _locale_category_t _generic_LC_ALL_desc;
     51 extern const _locale_category_t _dummy_LC_COLLATE_desc;
     52 #ifdef WITH_RUNE
     53 extern const _locale_category_t _citrus_LC_CTYPE_desc;
     54 extern const _locale_category_t _citrus_LC_MONETARY_desc;
     55 extern const _locale_category_t _citrus_LC_NUMERIC_desc;
     56 extern const _locale_category_t _citrus_LC_TIME_desc;
     57 extern const _locale_category_t _citrus_LC_MESSAGES_desc;
     58 #else
     59 extern const _locale_category_t _localeio_LC_CTYPE_desc;
     60 extern const _locale_category_t _localeio_LC_MONETARY_desc;
     61 extern const _locale_category_t _localeio_LC_NUMERIC_desc;
     62 extern const _locale_category_t _localeio_LC_TIME_desc;
     63 extern const _locale_category_t _localeio_LC_MESSAGES_desc;
     64 #endif
     65 
     66 __link_set_add_data(all_categories, _generic_LC_ALL_desc);
     67 __link_set_add_data(all_categories, _dummy_LC_COLLATE_desc);
     68 #ifdef WITH_RUNE
     69 __link_set_add_data(all_categories, _citrus_LC_CTYPE_desc);
     70 __link_set_add_data(all_categories, _citrus_LC_MONETARY_desc);
     71 __link_set_add_data(all_categories, _citrus_LC_NUMERIC_desc);
     72 __link_set_add_data(all_categories, _citrus_LC_TIME_desc);
     73 __link_set_add_data(all_categories, _citrus_LC_MESSAGES_desc);
     74 #else
     75 __link_set_add_data(all_categories, _localeio_LC_CTYPE_desc);
     76 __link_set_add_data(all_categories, _localeio_LC_MONETARY_desc);
     77 __link_set_add_data(all_categories, _localeio_LC_NUMERIC_desc);
     78 __link_set_add_data(all_categories, _localeio_LC_TIME_desc);
     79 __link_set_add_data(all_categories, _localeio_LC_MESSAGES_desc);
     80 #endif
     81 
     82 _locale_category_t *
     83 _find_category(int category)
     84 {
     85 	_locale_category_t * const *p;
     86 
     87 	__link_set_foreach(p, all_categories) {
     88 		if ((*p)->category == category)
     89 			return *p;
     90 	}
     91 	return NULL;
     92 }
     93 
     94 const char *
     95 _get_locale_env(const char *category)
     96 {
     97 	const char *name;
     98 
     99 	/* 1. check LC_ALL */
    100 	name = (const char *)getenv("LC_ALL");
    101 	if (name == NULL || *name == '\0') {
    102 		/* 2. check LC_* */
    103 		name = (const char *)getenv(category);
    104 		if (name == NULL || *name == '\0') {
    105 			/* 3. check LANG */
    106 			name = getenv("LANG");
    107 		}
    108 	}
    109 	if (name == NULL || *name == '\0' || strchr(name, '/'))
    110 		/* 4. if none is set, fall to "C" */
    111 		name = _C_LOCALE;
    112 	return name;
    113 }
    114 
    115 char *
    116 __setlocale(int category, const char *name)
    117 {
    118 	_locale_category_t *l;
    119 	struct _locale_impl_t *impl;
    120 
    121 	if (category >= LC_ALL && category < _LC_LAST) {
    122 		l = _find_category(category);
    123 		if (l != NULL) {
    124 			if (issetugid() || ((_PathLocale == NULL &&
    125 			    (_PathLocale = getenv("PATH_LOCALE")) == NULL) ||
    126 			    *_PathLocale == '\0'))
    127 				_PathLocale = _PATH_LOCALE;
    128 			impl = *_current_locale();
    129 			return __UNCONST((*l->setlocale)(name, impl));
    130 		}
    131 	}
    132 	return NULL;
    133 }
    134