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75683450 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2014 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
11c3a366 TA |
20 | #include <dirent.h> |
21 | #include <errno.h> | |
22 | #include <fcntl.h> | |
8752c575 | 23 | #include <langinfo.h> |
11c3a366 | 24 | #include <libintl.h> |
8752c575 | 25 | #include <locale.h> |
11c3a366 TA |
26 | #include <stddef.h> |
27 | #include <stdint.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
75683450 | 30 | #include <sys/mman.h> |
11c3a366 | 31 | #include <sys/stat.h> |
75683450 | 32 | |
a0956174 | 33 | #include "dirent-util.h" |
3ffd4af2 | 34 | #include "fd-util.h" |
93cc7779 | 35 | #include "hashmap.h" |
3ffd4af2 | 36 | #include "locale-util.h" |
bb15fafe | 37 | #include "path-util.h" |
75683450 | 38 | #include "set.h" |
8b43440b | 39 | #include "string-table.h" |
07630cea | 40 | #include "string-util.h" |
75683450 | 41 | #include "strv.h" |
07630cea | 42 | #include "utf8.h" |
75683450 LP |
43 | |
44 | static int add_locales_from_archive(Set *locales) { | |
45 | /* Stolen from glibc... */ | |
46 | ||
47 | struct locarhead { | |
48 | uint32_t magic; | |
49 | /* Serial number. */ | |
50 | uint32_t serial; | |
51 | /* Name hash table. */ | |
52 | uint32_t namehash_offset; | |
53 | uint32_t namehash_used; | |
54 | uint32_t namehash_size; | |
55 | /* String table. */ | |
56 | uint32_t string_offset; | |
57 | uint32_t string_used; | |
58 | uint32_t string_size; | |
59 | /* Table with locale records. */ | |
60 | uint32_t locrectab_offset; | |
61 | uint32_t locrectab_used; | |
62 | uint32_t locrectab_size; | |
63 | /* MD5 sum hash table. */ | |
64 | uint32_t sumhash_offset; | |
65 | uint32_t sumhash_used; | |
66 | uint32_t sumhash_size; | |
67 | }; | |
68 | ||
69 | struct namehashent { | |
70 | /* Hash value of the name. */ | |
71 | uint32_t hashval; | |
72 | /* Offset of the name in the string table. */ | |
73 | uint32_t name_offset; | |
74 | /* Offset of the locale record. */ | |
75 | uint32_t locrec_offset; | |
76 | }; | |
77 | ||
78 | const struct locarhead *h; | |
79 | const struct namehashent *e; | |
80 | const void *p = MAP_FAILED; | |
81 | _cleanup_close_ int fd = -1; | |
82 | size_t sz = 0; | |
83 | struct stat st; | |
84 | unsigned i; | |
85 | int r; | |
86 | ||
87 | fd = open("/usr/lib/locale/locale-archive", O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
88 | if (fd < 0) | |
89 | return errno == ENOENT ? 0 : -errno; | |
90 | ||
91 | if (fstat(fd, &st) < 0) | |
92 | return -errno; | |
93 | ||
94 | if (!S_ISREG(st.st_mode)) | |
95 | return -EBADMSG; | |
96 | ||
97 | if (st.st_size < (off_t) sizeof(struct locarhead)) | |
98 | return -EBADMSG; | |
99 | ||
100 | p = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0); | |
101 | if (p == MAP_FAILED) | |
102 | return -errno; | |
103 | ||
104 | h = (const struct locarhead *) p; | |
105 | if (h->magic != 0xde020109 || | |
106 | h->namehash_offset + h->namehash_size > st.st_size || | |
107 | h->string_offset + h->string_size > st.st_size || | |
108 | h->locrectab_offset + h->locrectab_size > st.st_size || | |
109 | h->sumhash_offset + h->sumhash_size > st.st_size) { | |
110 | r = -EBADMSG; | |
111 | goto finish; | |
112 | } | |
113 | ||
114 | e = (const struct namehashent*) ((const uint8_t*) p + h->namehash_offset); | |
115 | for (i = 0; i < h->namehash_size; i++) { | |
116 | char *z; | |
117 | ||
118 | if (e[i].locrec_offset == 0) | |
119 | continue; | |
120 | ||
121 | if (!utf8_is_valid((char*) p + e[i].name_offset)) | |
122 | continue; | |
123 | ||
124 | z = strdup((char*) p + e[i].name_offset); | |
125 | if (!z) { | |
126 | r = -ENOMEM; | |
127 | goto finish; | |
128 | } | |
129 | ||
130 | r = set_consume(locales, z); | |
131 | if (r < 0) | |
132 | goto finish; | |
133 | } | |
134 | ||
135 | r = 0; | |
136 | ||
137 | finish: | |
138 | if (p != MAP_FAILED) | |
139 | munmap((void*) p, sz); | |
140 | ||
141 | return r; | |
142 | } | |
143 | ||
144 | static int add_locales_from_libdir (Set *locales) { | |
145 | _cleanup_closedir_ DIR *dir = NULL; | |
146 | struct dirent *entry; | |
147 | int r; | |
148 | ||
149 | dir = opendir("/usr/lib/locale"); | |
150 | if (!dir) | |
151 | return errno == ENOENT ? 0 : -errno; | |
152 | ||
153 | FOREACH_DIRENT(entry, dir, return -errno) { | |
154 | char *z; | |
155 | ||
331fb4ca EV |
156 | dirent_ensure_type(dir, entry); |
157 | ||
75683450 LP |
158 | if (entry->d_type != DT_DIR) |
159 | continue; | |
160 | ||
161 | z = strdup(entry->d_name); | |
162 | if (!z) | |
163 | return -ENOMEM; | |
164 | ||
165 | r = set_consume(locales, z); | |
166 | if (r < 0 && r != -EEXIST) | |
167 | return r; | |
168 | } | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | int get_locales(char ***ret) { | |
174 | _cleanup_set_free_ Set *locales = NULL; | |
175 | _cleanup_strv_free_ char **l = NULL; | |
176 | int r; | |
177 | ||
d5099efc | 178 | locales = set_new(&string_hash_ops); |
75683450 LP |
179 | if (!locales) |
180 | return -ENOMEM; | |
181 | ||
182 | r = add_locales_from_archive(locales); | |
183 | if (r < 0 && r != -ENOENT) | |
184 | return r; | |
185 | ||
186 | r = add_locales_from_libdir(locales); | |
187 | if (r < 0) | |
188 | return r; | |
189 | ||
190 | l = set_get_strv(locales); | |
191 | if (!l) | |
192 | return -ENOMEM; | |
193 | ||
194 | strv_sort(l); | |
195 | ||
196 | *ret = l; | |
197 | l = NULL; | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | bool locale_is_valid(const char *name) { | |
203 | ||
204 | if (isempty(name)) | |
205 | return false; | |
206 | ||
207 | if (strlen(name) >= 128) | |
208 | return false; | |
209 | ||
210 | if (!utf8_is_valid(name)) | |
211 | return false; | |
212 | ||
ae6c3cc0 | 213 | if (!filename_is_valid(name)) |
75683450 LP |
214 | return false; |
215 | ||
216 | if (!string_is_safe(name)) | |
217 | return false; | |
218 | ||
219 | return true; | |
220 | } | |
a3428668 | 221 | |
8752c575 LP |
222 | void init_gettext(void) { |
223 | setlocale(LC_ALL, ""); | |
224 | textdomain(GETTEXT_PACKAGE); | |
225 | } | |
226 | ||
227 | bool is_locale_utf8(void) { | |
228 | const char *set; | |
229 | static int cached_answer = -1; | |
230 | ||
231 | /* Note that we default to 'true' here, since today UTF8 is | |
232 | * pretty much supported everywhere. */ | |
233 | ||
234 | if (cached_answer >= 0) | |
235 | goto out; | |
236 | ||
237 | if (!setlocale(LC_ALL, "")) { | |
238 | cached_answer = true; | |
239 | goto out; | |
240 | } | |
241 | ||
242 | set = nl_langinfo(CODESET); | |
243 | if (!set) { | |
244 | cached_answer = true; | |
245 | goto out; | |
246 | } | |
247 | ||
248 | if (streq(set, "UTF-8")) { | |
249 | cached_answer = true; | |
250 | goto out; | |
251 | } | |
252 | ||
253 | /* For LC_CTYPE=="C" return true, because CTYPE is effectly | |
254 | * unset and everything can do to UTF-8 nowadays. */ | |
255 | set = setlocale(LC_CTYPE, NULL); | |
256 | if (!set) { | |
257 | cached_answer = true; | |
258 | goto out; | |
259 | } | |
260 | ||
261 | /* Check result, but ignore the result if C was set | |
262 | * explicitly. */ | |
263 | cached_answer = | |
264 | STR_IN_SET(set, "C", "POSIX") && | |
265 | !getenv("LC_ALL") && | |
266 | !getenv("LC_CTYPE") && | |
267 | !getenv("LANG"); | |
268 | ||
269 | out: | |
270 | return (bool) cached_answer; | |
271 | } | |
272 | ||
273 | ||
274 | const char *draw_special_char(DrawSpecialChar ch) { | |
275 | ||
276 | static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = { | |
277 | ||
278 | /* UTF-8 */ { | |
279 | [DRAW_TREE_VERTICAL] = "\342\224\202 ", /* │ */ | |
280 | [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */ | |
281 | [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */ | |
282 | [DRAW_TREE_SPACE] = " ", /* */ | |
283 | [DRAW_TRIANGULAR_BULLET] = "\342\200\243", /* ‣ */ | |
284 | [DRAW_BLACK_CIRCLE] = "\342\227\217", /* ● */ | |
285 | [DRAW_ARROW] = "\342\206\222", /* → */ | |
286 | [DRAW_DASH] = "\342\200\223", /* – */ | |
287 | }, | |
288 | ||
289 | /* ASCII fallback */ { | |
290 | [DRAW_TREE_VERTICAL] = "| ", | |
291 | [DRAW_TREE_BRANCH] = "|-", | |
292 | [DRAW_TREE_RIGHT] = "`-", | |
293 | [DRAW_TREE_SPACE] = " ", | |
294 | [DRAW_TRIANGULAR_BULLET] = ">", | |
295 | [DRAW_BLACK_CIRCLE] = "*", | |
296 | [DRAW_ARROW] = "->", | |
297 | [DRAW_DASH] = "-", | |
298 | } | |
299 | }; | |
300 | ||
301 | return draw_table[!is_locale_utf8()][ch]; | |
302 | } | |
303 | ||
a3428668 MS |
304 | static const char * const locale_variable_table[_VARIABLE_LC_MAX] = { |
305 | [VARIABLE_LANG] = "LANG", | |
306 | [VARIABLE_LANGUAGE] = "LANGUAGE", | |
307 | [VARIABLE_LC_CTYPE] = "LC_CTYPE", | |
308 | [VARIABLE_LC_NUMERIC] = "LC_NUMERIC", | |
309 | [VARIABLE_LC_TIME] = "LC_TIME", | |
310 | [VARIABLE_LC_COLLATE] = "LC_COLLATE", | |
311 | [VARIABLE_LC_MONETARY] = "LC_MONETARY", | |
312 | [VARIABLE_LC_MESSAGES] = "LC_MESSAGES", | |
313 | [VARIABLE_LC_PAPER] = "LC_PAPER", | |
314 | [VARIABLE_LC_NAME] = "LC_NAME", | |
315 | [VARIABLE_LC_ADDRESS] = "LC_ADDRESS", | |
316 | [VARIABLE_LC_TELEPHONE] = "LC_TELEPHONE", | |
317 | [VARIABLE_LC_MEASUREMENT] = "LC_MEASUREMENT", | |
318 | [VARIABLE_LC_IDENTIFICATION] = "LC_IDENTIFICATION" | |
319 | }; | |
320 | ||
321 | DEFINE_STRING_TABLE_LOOKUP(locale_variable, LocaleVariable); |