1 #include <locale.h>
2 #include <string.h>
3 #include <sys/mman.h>
4 #include "locale_impl.h"
5 #include "libc.h"
6 #include "lock.h"
7
__lctrans_impl(const char * msg,const struct __locale_map * lm)8 const char *__lctrans_impl(const char *msg, const struct __locale_map *lm)
9 {
10 const char *trans = 0;
11 if (lm) trans = __mo_lookup(lm->map, lm->map_size, msg);
12 return trans ? trans : msg;
13 }
14
15 static const char envvars[][12] = {
16 "LC_CTYPE",
17 "LC_NUMERIC",
18 "LC_TIME",
19 "LC_COLLATE",
20 "LC_MONETARY",
21 "LC_MESSAGES",
22 };
23
__get_locale(int cat,const char * val)24 const struct __locale_map *__get_locale(int cat, const char *val)
25 {
26 static volatile int lock[1];
27 static void *volatile loc_head;
28 const struct __locale_map *p;
29 struct __locale_map *new = 0;
30 const char *path = 0, *z;
31 char buf[256];
32 size_t l, n;
33
34 if (!*val) {
35 (val = getenv("LC_ALL")) && *val ||
36 (val = getenv(envvars[cat])) && *val ||
37 (val = getenv("LANG")) && *val ||
38 (val = "C.UTF-8");
39 }
40
41 /* Limit name length and forbid leading dot or any slashes. */
42 for (n=0; n<LOCALE_NAME_MAX && val[n] && val[n]!='/'; n++);
43 if (val[0]=='.' || val[n]) val = "C.UTF-8";
44 int builtin = (val[0]=='C' && !val[1])
45 || !strcmp(val, "C.UTF-8")
46 || !strcmp(val, "POSIX");
47
48 if (builtin) {
49 if (cat == LC_CTYPE && val[1]=='.')
50 return (void *)&__c_dot_utf8;
51 return 0;
52 }
53
54 for (p=loc_head; p; p=p->next)
55 if (!strcmp(val, p->name)) return p;
56
57 LOCK(lock);
58
59 for (p=loc_head; p; p=p->next)
60 if (!strcmp(val, p->name)) {
61 UNLOCK(lock);
62 return p;
63 }
64
65 if (!libc.secure) path = getenv("MUSL_LOCPATH");
66 /* FIXME: add a default path? */
67
68 if (path) for (; *path; path=z+!!*z) {
69 z = __strchrnul(path, ':');
70 l = z - path - !!*z;
71 if (l >= sizeof buf - n - 2) continue;
72 memcpy(buf, path, l);
73 buf[l] = '/';
74 memcpy(buf+l+1, val, n);
75 buf[l+1+n] = 0;
76 size_t map_size;
77 const void *map = __map_file(buf, &map_size);
78 if (map) {
79 new = malloc(sizeof *new);
80 if (!new) {
81 __munmap((void *)map, map_size);
82 break;
83 }
84 new->map = map;
85 new->map_size = map_size;
86 memcpy(new->name, val, n);
87 new->name[n] = 0;
88 new->next = loc_head;
89 loc_head = new;
90 break;
91 }
92 }
93
94 /* If no locale definition was found, make a locale map
95 * object anyway to store the name, which is kept for the
96 * sake of being able to do message translations at the
97 * application level. */
98 if (!new && (new = malloc(sizeof *new))) {
99 new->map = __c_dot_utf8.map;
100 new->map_size = __c_dot_utf8.map_size;
101 memcpy(new->name, val, n);
102 new->name[n] = 0;
103 new->next = loc_head;
104 loc_head = new;
105 }
106
107 /* For LC_CTYPE, never return a null pointer unless the
108 * requested name was "C" or "POSIX". */
109 if (!new && cat == LC_CTYPE) new = (void *)&__c_dot_utf8;
110
111 UNLOCK(lock);
112 return new;
113 }
114