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