1 /* $NetBSD: setlocale.c,v 1.66 2024/06/08 21:35:18 joerg 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 1.66 2024/06/08 21:35:18 joerg Exp $");
32 #endif /* LIBC_SCCS and not lint */
33
34 #include "namespace.h"
35 #include <sys/types.h>
36 #include <sys/localedef.h>
37 #include <locale.h>
38 #include <limits.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 static _locale_set_t all_categories[_LC_LAST] = {
49 [LC_ALL ] = &_generic_LC_ALL_setlocale,
50 [LC_COLLATE ] = &_dummy_LC_COLLATE_setlocale,
51 [LC_CTYPE ] = &_citrus_LC_CTYPE_setlocale,
52 [LC_MONETARY] = &_citrus_LC_MONETARY_setlocale,
53 [LC_NUMERIC ] = &_citrus_LC_NUMERIC_setlocale,
54 [LC_TIME ] = &_citrus_LC_TIME_setlocale,
55 [LC_MESSAGES] = &_citrus_LC_MESSAGES_setlocale,
56 };
57
58 /* XXX Consider locking the list. Race condition leaks memory. */
59 static SLIST_HEAD(, _locale_cache_t) caches = {
60 __UNCONST(&_C_cache)
61 };
62
63 int
_setlocale_cache(locale_t loc,struct _locale_cache_t * cache)64 _setlocale_cache(locale_t loc, struct _locale_cache_t *cache)
65 {
66 const char *monetary_name = loc->part_name[LC_MONETARY];
67 const char *numeric_name = loc->part_name[LC_NUMERIC];
68 const char *message_name = loc->part_name[LC_MESSAGES];
69 _NumericLocale *numeric = loc->part_impl[LC_NUMERIC];
70 _MonetaryLocale *monetary = loc->part_impl[LC_MONETARY];
71 struct lconv *ldata;
72
73 struct _locale_cache_t *old_cache;
74
75 SLIST_FOREACH(old_cache, &caches, cache_link) {
76 if (monetary_name != old_cache->monetary_name &&
77 strcmp(monetary_name, old_cache->monetary_name) != 0)
78 continue;
79 if (numeric_name != old_cache->numeric_name &&
80 strcmp(numeric_name, old_cache->numeric_name) != 0)
81 continue;
82 if (message_name != old_cache->message_name &&
83 strcmp(message_name, old_cache->message_name) != 0)
84 continue;
85 loc->cache = old_cache;
86 free(cache);
87 return 0;
88 }
89
90 if (cache == NULL) {
91 cache = malloc(sizeof(*cache));
92 if (cache == NULL)
93 return -1;
94 }
95
96 cache->monetary_name = monetary_name;
97 cache->numeric_name = numeric_name;
98 cache->message_name = message_name;
99 cache->errlist = NULL;
100 cache->errlistp = &cache->errlist;
101 cache->errlist_prefix = NULL;
102 ldata = &cache->ldata;
103
104 ldata->decimal_point = __UNCONST(numeric->decimal_point);
105 ldata->thousands_sep = __UNCONST(numeric->thousands_sep);
106 ldata->grouping = __UNCONST(numeric->grouping);
107
108 ldata->int_curr_symbol = __UNCONST(monetary->int_curr_symbol);
109 ldata->currency_symbol = __UNCONST(monetary->currency_symbol);
110 ldata->mon_decimal_point = __UNCONST(monetary->mon_decimal_point);
111 ldata->mon_thousands_sep = __UNCONST(monetary->mon_thousands_sep);
112 ldata->mon_grouping = __UNCONST(monetary->mon_grouping);
113 ldata->positive_sign = __UNCONST(monetary->positive_sign);
114 ldata->negative_sign = __UNCONST(monetary->negative_sign);
115
116 ldata->int_frac_digits = monetary->int_frac_digits;
117 ldata->frac_digits = monetary->frac_digits;
118 ldata->p_cs_precedes = monetary->p_cs_precedes;
119 ldata->p_sep_by_space = monetary->p_sep_by_space;
120 ldata->n_cs_precedes = monetary->n_cs_precedes;
121 ldata->n_sep_by_space = monetary->n_sep_by_space;
122 ldata->p_sign_posn = monetary->p_sign_posn;
123 ldata->n_sign_posn = monetary->n_sign_posn;
124 ldata->int_p_cs_precedes = monetary->int_p_cs_precedes;
125 ldata->int_n_cs_precedes = monetary->int_n_cs_precedes;
126 ldata->int_p_sep_by_space = monetary-> int_p_sep_by_space;
127 ldata->int_n_sep_by_space = monetary->int_n_sep_by_space;
128 ldata->int_p_sign_posn = monetary->int_p_sign_posn;
129 ldata->int_n_sign_posn = monetary->int_n_sign_posn;
130 SLIST_INSERT_HEAD(&caches, cache, cache_link);
131
132 loc->cache = cache;
133 return 0;
134 }
135
136 _locale_set_t
_find_category(int category)137 _find_category(int category)
138 {
139 static int initialised;
140
141 if (!initialised) {
142 if (issetugid() || ((_PathLocale == NULL &&
143 (_PathLocale = getenv("PATH_LOCALE")) == NULL) ||
144 *_PathLocale == '\0'))
145 _PathLocale = _PATH_LOCALE;
146 initialised = 1;
147 }
148
149 if (category >= LC_ALL && category < _LC_LAST)
150 return all_categories[category];
151 return NULL;
152 }
153
154 const char *
_get_locale_env(const char * category)155 _get_locale_env(const char *category)
156 {
157 const char *name;
158
159 /* 1. check LC_ALL */
160 name = (const char *)getenv("LC_ALL");
161 if (name == NULL || *name == '\0') {
162 /* 2. check LC_* */
163 name = (const char *)getenv(category);
164 if (name == NULL || *name == '\0') {
165 /* 3. check LANG */
166 name = getenv("LANG");
167 }
168 }
169 if (name == NULL || *name == '\0' || strchr(name, '/'))
170 /* 4. if none is set, fall to "C" */
171 name = _C_LOCALE;
172 return name;
173 }
174
175 char *
__setlocale(int category,const char * name)176 __setlocale(int category, const char *name)
177 {
178 _locale_set_t sl;
179 locale_t loc;
180 struct _locale_cache_t *cache;
181 const char *result;
182
183 sl = _find_category(category);
184 if (sl == NULL)
185 return NULL;
186 cache = malloc(sizeof(*cache));
187 if (cache == NULL)
188 return NULL;
189 loc = _current_locale();
190 result = (*sl)(name, loc);
191 _setlocale_cache(loc, cache);
192 return __UNCONST(result);
193 }
194
195 char *
setlocale(int category,const char * locale)196 setlocale(int category, const char *locale)
197 {
198
199 /* locale may be NULL */
200
201 __mb_len_max_runtime = MB_LEN_MAX;
202 return __setlocale(category, locale);
203 }
204