lib/libc/locale/setlocale.c

   1 /* $NetBSD: setlocale.c,v 1.56 2009/01/11 02:46:29 christos 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 1.56 2009/01/11 02:46:29 christos 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 }