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6973fc01 | 1 | /* Handle configuration data. |
2b778ceb | 2 | Copyright (C) 1997-2021 Free Software Foundation, Inc. |
6973fc01 UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
6973fc01 UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
6973fc01 | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 17 | License along with the GNU C Library; if not, see |
5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
6973fc01 | 19 | |
d6204268 | 20 | #include <assert.h> |
6973fc01 | 21 | #include <ctype.h> |
e34b0f29 | 22 | #include <errno.h> |
fab6d621 | 23 | #include <limits.h> |
5db91571 | 24 | #include <locale.h> |
6973fc01 | 25 | #include <search.h> |
17427edd | 26 | #include <stddef.h> |
6973fc01 | 27 | #include <stdio.h> |
2706ee38 | 28 | #include <stdio_ext.h> |
6973fc01 UD |
29 | #include <stdlib.h> |
30 | #include <string.h> | |
31 | #include <unistd.h> | |
32 | #include <sys/param.h> | |
33 | ||
ec999b8e | 34 | #include <libc-lock.h> |
e62c19f1 | 35 | #include <gconv_int.h> |
d8e8097f | 36 | #include <gconv_parseconfdir.h> |
6973fc01 UD |
37 | |
38 | /* This is the default path where we look for module lists. */ | |
39 | static const char default_gconv_path[] = GCONV_PATH; | |
40 | ||
335a3b0a AS |
41 | /* Type to represent search path. */ |
42 | struct path_elem | |
43 | { | |
44 | const char *name; | |
45 | size_t len; | |
46 | }; | |
47 | ||
835bf8e0 UD |
48 | /* The path elements, as determined by the __gconv_get_path function. |
49 | All path elements end in a slash. */ | |
17427edd | 50 | struct path_elem *__gconv_path_elem; |
835bf8e0 | 51 | /* Maximum length of a single path element in __gconv_path_elem. */ |
d6204268 UD |
52 | size_t __gconv_max_path_elem_len; |
53 | ||
54 | /* We use the following struct if we couldn't allocate memory. */ | |
4c038b68 | 55 | static const struct path_elem empty_path_elem = { NULL, 0 }; |
d6204268 | 56 | |
e34b0f29 UD |
57 | /* Filename extension for the modules. */ |
58 | #ifndef MODULE_EXT | |
59 | # define MODULE_EXT ".so" | |
60 | #endif | |
61 | static const char gconv_module_ext[] = MODULE_EXT; | |
62 | ||
6973fc01 UD |
63 | /* We have a few builtin transformations. */ |
64 | static struct gconv_module builtin_modules[] = | |
65 | { | |
f9ad060c UD |
66 | #define BUILTIN_TRANSFORMATION(From, To, Cost, Name, Fct, BtowcFct, \ |
67 | MinF, MaxF, MinT, MaxT) \ | |
6973fc01 | 68 | { \ |
0274d73c RM |
69 | .from_string = From, \ |
70 | .to_string = To, \ | |
71 | .cost_hi = Cost, \ | |
72 | .cost_lo = INT_MAX, \ | |
73 | .module_name = Name \ | |
6973fc01 | 74 | }, |
5891046a UD |
75 | #define BUILTIN_ALIAS(From, To) |
76 | ||
77 | #include "gconv_builtin.h" | |
5891046a UD |
78 | |
79 | #undef BUILTIN_TRANSFORMATION | |
80 | #undef BUILTIN_ALIAS | |
f9ad060c | 81 | }; |
5891046a | 82 | |
88dbff8c | 83 | static const char builtin_aliases[] = |
5891046a | 84 | { |
f9ad060c UD |
85 | #define BUILTIN_TRANSFORMATION(From, To, Cost, Name, Fct, BtowcFct, \ |
86 | MinF, MaxF, MinT, MaxT) | |
88dbff8c | 87 | #define BUILTIN_ALIAS(From, To) From "\0" To "\0" |
6973fc01 UD |
88 | |
89 | #include "gconv_builtin.h" | |
f9ad060c UD |
90 | |
91 | #undef BUILTIN_TRANSFORMATION | |
92 | #undef BUILTIN_ALIAS | |
6973fc01 UD |
93 | }; |
94 | ||
95 | ||
6b98979f UD |
96 | /* Value of the GCONV_PATH environment variable. */ |
97 | const char *__gconv_path_envvar; | |
98 | ||
99 | ||
2bd60880 | 100 | /* Test whether there is already a matching module known. */ |
6973fc01 | 101 | static int |
d2dfc5de | 102 | detect_conflict (const char *alias) |
6973fc01 | 103 | { |
2bd60880 | 104 | struct gconv_module *node = __gconv_modules_db; |
6973fc01 | 105 | |
2bd60880 | 106 | while (node != NULL) |
6973fc01 | 107 | { |
d2dfc5de | 108 | int cmpres = strcmp (alias, node->from_string); |
8c479619 | 109 | |
2bd60880 | 110 | if (cmpres == 0) |
d2dfc5de UD |
111 | /* We have a conflict. */ |
112 | return 1; | |
2bd60880 UD |
113 | else if (cmpres < 0) |
114 | node = node->left; | |
115 | else | |
116 | node = node->right; | |
8c479619 | 117 | } |
2bd60880 UD |
118 | |
119 | return node != NULL; | |
8c479619 UD |
120 | } |
121 | ||
122 | ||
88dbff8c UD |
123 | /* The actual code to add aliases. */ |
124 | static void | |
23e15ea1 | 125 | add_alias2 (const char *from, const char *to, const char *wp) |
88dbff8c UD |
126 | { |
127 | /* Test whether this alias conflicts with any available module. */ | |
128 | if (detect_conflict (from)) | |
129 | /* It does conflict, don't add the alias. */ | |
130 | return; | |
131 | ||
132 | struct gconv_alias *new_alias = (struct gconv_alias *) | |
133 | malloc (sizeof (struct gconv_alias) + (wp - from)); | |
134 | if (new_alias != NULL) | |
135 | { | |
136 | void **inserted; | |
137 | ||
138 | new_alias->fromname = memcpy ((char *) new_alias | |
139 | + sizeof (struct gconv_alias), | |
140 | from, wp - from); | |
141 | new_alias->toname = new_alias->fromname + (to - from); | |
142 | ||
143 | inserted = (void **) __tsearch (new_alias, &__gconv_alias_db, | |
144 | __gconv_alias_compare); | |
145 | if (inserted == NULL || *inserted != new_alias) | |
146 | /* Something went wrong, free this entry. */ | |
147 | free (new_alias); | |
148 | } | |
149 | } | |
150 | ||
151 | ||
a334319f | 152 | /* Add new alias. */ |
dd9423a6 | 153 | static void |
23e15ea1 | 154 | add_alias (char *rp) |
6973fc01 | 155 | { |
a334319f UD |
156 | /* We now expect two more string. The strings are normalized |
157 | (converted to UPPER case) and strored in the alias database. */ | |
a334319f UD |
158 | char *from, *to, *wp; |
159 | ||
4b5b009c | 160 | while (__isspace_l (*rp, _nl_C_locobj_ptr)) |
a334319f UD |
161 | ++rp; |
162 | from = wp = rp; | |
4b5b009c UD |
163 | while (*rp != '\0' && !__isspace_l (*rp, _nl_C_locobj_ptr)) |
164 | *wp++ = __toupper_l (*rp++, _nl_C_locobj_ptr); | |
a334319f UD |
165 | if (*rp == '\0') |
166 | /* There is no `to' string on the line. Ignore it. */ | |
167 | return; | |
168 | *wp++ = '\0'; | |
169 | to = ++rp; | |
4b5b009c | 170 | while (__isspace_l (*rp, _nl_C_locobj_ptr)) |
a334319f | 171 | ++rp; |
4b5b009c UD |
172 | while (*rp != '\0' && !__isspace_l (*rp, _nl_C_locobj_ptr)) |
173 | *wp++ = __toupper_l (*rp++, _nl_C_locobj_ptr); | |
a334319f UD |
174 | if (to == wp) |
175 | /* No `to' string, ignore the line. */ | |
176 | return; | |
177 | *wp++ = '\0'; | |
178 | ||
23e15ea1 | 179 | add_alias2 (from, to, wp); |
6973fc01 UD |
180 | } |
181 | ||
182 | ||
2bd60880 | 183 | /* Insert a data structure for a new module in the search tree. */ |
dd9423a6 | 184 | static void |
b2fe29dd | 185 | insert_module (struct gconv_module *newp, int tobefreed) |
2bd60880 UD |
186 | { |
187 | struct gconv_module **rootp = &__gconv_modules_db; | |
188 | ||
189 | while (*rootp != NULL) | |
190 | { | |
191 | struct gconv_module *root = *rootp; | |
2bd60880 UD |
192 | int cmpres; |
193 | ||
d2dfc5de | 194 | cmpres = strcmp (newp->from_string, root->from_string); |
2bd60880 UD |
195 | if (cmpres == 0) |
196 | { | |
d2dfc5de UD |
197 | /* Both strings are identical. Insert the string at the |
198 | end of the `same' list if it is not already there. */ | |
199 | while (strcmp (newp->from_string, root->from_string) != 0 | |
200 | || strcmp (newp->to_string, root->to_string) != 0) | |
2bd60880 | 201 | { |
d2dfc5de UD |
202 | rootp = &root->same; |
203 | root = *rootp; | |
204 | if (root == NULL) | |
205 | break; | |
2bd60880 UD |
206 | } |
207 | ||
d2dfc5de | 208 | if (root != NULL) |
b2fe29dd | 209 | { |
2debc8c5 UD |
210 | /* This is a no new conversion. But maybe the cost is |
211 | better. */ | |
212 | if (newp->cost_hi < root->cost_hi | |
213 | || (newp->cost_hi == root->cost_hi | |
214 | && newp->cost_lo < root->cost_lo)) | |
215 | { | |
9c0592ab UD |
216 | newp->left = root->left; |
217 | newp->right = root->right; | |
218 | newp->same = root->same; | |
219 | *rootp = newp; | |
2debc8c5 | 220 | |
9c0592ab UD |
221 | free (root); |
222 | } | |
223 | else if (tobefreed) | |
b2fe29dd UD |
224 | free (newp); |
225 | return; | |
226 | } | |
2bd60880 | 227 | |
d2dfc5de | 228 | break; |
2bd60880 UD |
229 | } |
230 | else if (cmpres < 0) | |
231 | rootp = &root->left; | |
232 | else | |
233 | rootp = &root->right; | |
234 | } | |
235 | ||
236 | /* Plug in the new node here. */ | |
237 | *rootp = newp; | |
238 | } | |
239 | ||
240 | ||
6973fc01 | 241 | /* Add new module. */ |
d2dfc5de | 242 | static void |
23e15ea1 | 243 | add_module (char *rp, const char *directory, size_t dir_len, int modcounter) |
6973fc01 UD |
244 | { |
245 | /* We expect now | |
246 | 1. `from' name | |
247 | 2. `to' name | |
248 | 3. filename of the module | |
249 | 4. an optional cost value | |
250 | */ | |
d2dfc5de | 251 | struct gconv_alias fake_alias; |
6973fc01 UD |
252 | struct gconv_module *new_module; |
253 | char *from, *to, *module, *wp; | |
e34b0f29 | 254 | int need_ext; |
fab6d621 | 255 | int cost_hi; |
6973fc01 | 256 | |
4b5b009c | 257 | while (__isspace_l (*rp, _nl_C_locobj_ptr)) |
6973fc01 UD |
258 | ++rp; |
259 | from = rp; | |
4b5b009c | 260 | while (*rp != '\0' && !__isspace_l (*rp, _nl_C_locobj_ptr)) |
6973fc01 | 261 | { |
4b5b009c | 262 | *rp = __toupper_l (*rp, _nl_C_locobj_ptr); |
6973fc01 UD |
263 | ++rp; |
264 | } | |
265 | if (*rp == '\0') | |
266 | return; | |
267 | *rp++ = '\0'; | |
268 | to = wp = rp; | |
4b5b009c | 269 | while (__isspace_l (*rp, _nl_C_locobj_ptr)) |
6973fc01 | 270 | ++rp; |
4b5b009c UD |
271 | while (*rp != '\0' && !__isspace_l (*rp, _nl_C_locobj_ptr)) |
272 | *wp++ = __toupper_l (*rp++, _nl_C_locobj_ptr); | |
6973fc01 UD |
273 | if (*rp == '\0') |
274 | return; | |
275 | *wp++ = '\0'; | |
276 | do | |
277 | ++rp; | |
4b5b009c | 278 | while (__isspace_l (*rp, _nl_C_locobj_ptr)); |
6973fc01 | 279 | module = wp; |
4b5b009c | 280 | while (*rp != '\0' && !__isspace_l (*rp, _nl_C_locobj_ptr)) |
6973fc01 UD |
281 | *wp++ = *rp++; |
282 | if (*rp == '\0') | |
283 | { | |
284 | /* There is no cost, use one by default. */ | |
285 | *wp++ = '\0'; | |
fab6d621 | 286 | cost_hi = 1; |
6973fc01 UD |
287 | } |
288 | else | |
289 | { | |
290 | /* There might be a cost value. */ | |
291 | char *endp; | |
292 | ||
293 | *wp++ = '\0'; | |
fab6d621 | 294 | cost_hi = strtol (rp, &endp, 10); |
2bd60880 | 295 | if (rp == endp || cost_hi < 1) |
6973fc01 | 296 | /* No useful information. */ |
fab6d621 | 297 | cost_hi = 1; |
6973fc01 UD |
298 | } |
299 | ||
300 | if (module[0] == '\0') | |
301 | /* No module name given. */ | |
302 | return; | |
303 | if (module[0] == '/') | |
304 | dir_len = 0; | |
6973fc01 | 305 | |
e34b0f29 UD |
306 | /* See whether we must add the ending. */ |
307 | need_ext = 0; | |
17427edd | 308 | if (wp - module < (ptrdiff_t) sizeof (gconv_module_ext) |
e34b0f29 UD |
309 | || memcmp (wp - sizeof (gconv_module_ext), gconv_module_ext, |
310 | sizeof (gconv_module_ext)) != 0) | |
311 | /* We must add the module extension. */ | |
312 | need_ext = sizeof (gconv_module_ext) - 1; | |
313 | ||
d2dfc5de UD |
314 | /* See whether we have already an alias with this name defined. */ |
315 | fake_alias.fromname = strndupa (from, to - from); | |
6973fc01 | 316 | |
d2dfc5de UD |
317 | if (__tfind (&fake_alias, &__gconv_alias_db, __gconv_alias_compare) != NULL) |
318 | /* This module duplicates an alias. */ | |
319 | return; | |
6973fc01 | 320 | |
2bd60880 UD |
321 | new_module = (struct gconv_module *) calloc (1, |
322 | sizeof (struct gconv_module) | |
e34b0f29 UD |
323 | + (wp - from) |
324 | + dir_len + need_ext); | |
6973fc01 UD |
325 | if (new_module != NULL) |
326 | { | |
e34b0f29 UD |
327 | char *tmp; |
328 | ||
17427edd UD |
329 | new_module->from_string = tmp = (char *) (new_module + 1); |
330 | tmp = __mempcpy (tmp, from, to - from); | |
e34b0f29 | 331 | |
17427edd UD |
332 | new_module->to_string = tmp; |
333 | tmp = __mempcpy (tmp, to, module - to); | |
6973fc01 | 334 | |
fab6d621 UD |
335 | new_module->cost_hi = cost_hi; |
336 | new_module->cost_lo = modcounter; | |
6973fc01 | 337 | |
17427edd | 338 | new_module->module_name = tmp; |
e34b0f29 | 339 | |
17427edd UD |
340 | if (dir_len != 0) |
341 | tmp = __mempcpy (tmp, directory, dir_len); | |
6973fc01 | 342 | |
e34b0f29 UD |
343 | tmp = __mempcpy (tmp, module, wp - module); |
344 | ||
345 | if (need_ext) | |
346 | memcpy (tmp - 1, gconv_module_ext, sizeof (gconv_module_ext)); | |
347 | ||
2bd60880 | 348 | /* Now insert the new module data structure in our search tree. */ |
b2fe29dd | 349 | insert_module (new_module, 1); |
6973fc01 UD |
350 | } |
351 | } | |
352 | ||
353 | ||
c5288d37 AS |
354 | /* Determine the directories we are looking for data in. This function should |
355 | only be called from __gconv_read_conf. */ | |
335a3b0a | 356 | static void |
d6204268 UD |
357 | __gconv_get_path (void) |
358 | { | |
359 | struct path_elem *result; | |
d6204268 | 360 | |
c5288d37 AS |
361 | /* This function is only ever called when __gconv_path_elem is NULL. */ |
362 | result = __gconv_path_elem; | |
363 | assert (result == NULL); | |
364 | ||
365 | /* Determine the complete path first. */ | |
366 | char *gconv_path; | |
367 | size_t gconv_path_len; | |
368 | char *elem; | |
369 | char *oldp; | |
370 | char *cp; | |
371 | int nelems; | |
372 | char *cwd; | |
373 | size_t cwdlen; | |
374 | ||
375 | if (__gconv_path_envvar == NULL) | |
d6204268 | 376 | { |
c5288d37 AS |
377 | /* No user-defined path. Make a modifiable copy of the |
378 | default path. */ | |
379 | gconv_path = strdupa (default_gconv_path); | |
380 | gconv_path_len = sizeof (default_gconv_path); | |
381 | cwd = NULL; | |
382 | cwdlen = 0; | |
383 | } | |
384 | else | |
385 | { | |
386 | /* Append the default path to the user-defined path. */ | |
387 | size_t user_len = strlen (__gconv_path_envvar); | |
388 | ||
389 | gconv_path_len = user_len + 1 + sizeof (default_gconv_path); | |
390 | gconv_path = alloca (gconv_path_len); | |
391 | __mempcpy (__mempcpy (__mempcpy (gconv_path, __gconv_path_envvar, | |
392 | user_len), | |
393 | ":", 1), | |
394 | default_gconv_path, sizeof (default_gconv_path)); | |
395 | cwd = __getcwd (NULL, 0); | |
396 | cwdlen = __glibc_unlikely (cwd == NULL) ? 0 : strlen (cwd); | |
397 | } | |
398 | assert (default_gconv_path[0] == '/'); | |
d6204268 | 399 | |
c5288d37 AS |
400 | /* In a first pass we calculate the number of elements. */ |
401 | oldp = NULL; | |
402 | cp = strchr (gconv_path, ':'); | |
403 | nelems = 1; | |
404 | while (cp != NULL) | |
405 | { | |
406 | if (cp != oldp + 1) | |
407 | ++nelems; | |
408 | oldp = cp; | |
409 | cp = strchr (cp + 1, ':'); | |
410 | } | |
40739d9f | 411 | |
c5288d37 AS |
412 | /* Allocate the memory for the result. */ |
413 | result = malloc ((nelems + 1) | |
414 | * sizeof (struct path_elem) | |
415 | + gconv_path_len + nelems | |
416 | + (nelems - 1) * (cwdlen + 1)); | |
417 | if (result != NULL) | |
418 | { | |
419 | char *strspace = (char *) &result[nelems + 1]; | |
420 | int n = 0; | |
421 | ||
422 | /* Separate the individual parts. */ | |
423 | __gconv_max_path_elem_len = 0; | |
424 | elem = __strtok_r (gconv_path, ":", &gconv_path); | |
425 | assert (elem != NULL); | |
426 | do | |
427 | { | |
428 | result[n].name = strspace; | |
429 | if (elem[0] != '/') | |
430 | { | |
431 | assert (cwd != NULL); | |
432 | strspace = __mempcpy (strspace, cwd, cwdlen); | |
433 | *strspace++ = '/'; | |
434 | } | |
435 | strspace = __stpcpy (strspace, elem); | |
436 | if (strspace[-1] != '/') | |
437 | *strspace++ = '/'; | |
438 | ||
439 | result[n].len = strspace - result[n].name; | |
440 | if (result[n].len > __gconv_max_path_elem_len) | |
441 | __gconv_max_path_elem_len = result[n].len; | |
442 | ||
443 | *strspace++ = '\0'; | |
444 | ++n; | |
445 | } | |
446 | while ((elem = __strtok_r (NULL, ":", &gconv_path)) != NULL); | |
447 | ||
448 | result[n].name = NULL; | |
449 | result[n].len = 0; | |
d6204268 UD |
450 | } |
451 | ||
c5288d37 AS |
452 | __gconv_path_elem = result ?: (struct path_elem *) &empty_path_elem; |
453 | ||
454 | free (cwd); | |
d6204268 UD |
455 | } |
456 | ||
457 | ||
6973fc01 | 458 | /* Read all configuration files found in the user-specified and the default |
c5288d37 AS |
459 | path. This function should only be called once during the program's |
460 | lifetime. It disregards locking and synchronization because its only | |
461 | caller, __gconv_load_conf, handles this. */ | |
462 | static void | |
6973fc01 UD |
463 | __gconv_read_conf (void) |
464 | { | |
e34b0f29 | 465 | int save_errno = errno; |
5891046a | 466 | size_t cnt; |
6973fc01 | 467 | |
6b98979f UD |
468 | /* First see whether we should use the cache. */ |
469 | if (__gconv_load_cache () == 0) | |
470 | { | |
471 | /* Yes, we are done. */ | |
472 | __set_errno (save_errno); | |
473 | return; | |
474 | } | |
475 | ||
476 | #ifndef STATIC_GCONV | |
d6204268 | 477 | /* Find out where we have to look. */ |
6d6ee046 | 478 | __gconv_get_path (); |
6973fc01 | 479 | |
d6204268 | 480 | for (cnt = 0; __gconv_path_elem[cnt].name != NULL; ++cnt) |
d8e8097f SP |
481 | gconv_parseconfdir (__gconv_path_elem[cnt].name, |
482 | __gconv_path_elem[cnt].len); | |
6b98979f | 483 | #endif |
6973fc01 | 484 | |
2bd60880 UD |
485 | /* Add the internal modules. */ |
486 | for (cnt = 0; cnt < sizeof (builtin_modules) / sizeof (builtin_modules[0]); | |
487 | ++cnt) | |
6973fc01 | 488 | { |
d2dfc5de | 489 | struct gconv_alias fake_alias; |
6973fc01 | 490 | |
8a0746ae | 491 | fake_alias.fromname = (char *) builtin_modules[cnt].from_string; |
6973fc01 | 492 | |
d2dfc5de UD |
493 | if (__tfind (&fake_alias, &__gconv_alias_db, __gconv_alias_compare) |
494 | != NULL) | |
495 | /* It'll conflict so don't add it. */ | |
496 | continue; | |
2bd60880 | 497 | |
b2fe29dd | 498 | insert_module (&builtin_modules[cnt], 0); |
e34b0f29 | 499 | } |
6973fc01 | 500 | |
5891046a | 501 | /* Add aliases for builtin conversions. */ |
88dbff8c UD |
502 | const char *cp = builtin_aliases; |
503 | do | |
5891046a | 504 | { |
88dbff8c UD |
505 | const char *from = cp; |
506 | const char *to = __rawmemchr (from, '\0') + 1; | |
507 | cp = __rawmemchr (to, '\0') + 1; | |
508 | ||
23e15ea1 | 509 | add_alias2 (from, to, cp); |
5891046a | 510 | } |
88dbff8c | 511 | while (*cp != '\0'); |
5891046a | 512 | |
e34b0f29 UD |
513 | /* Restore the error number. */ |
514 | __set_errno (save_errno); | |
6973fc01 | 515 | } |
d6204268 UD |
516 | |
517 | ||
c5288d37 AS |
518 | /* This "once" variable is used to do a one-time load of the configuration. */ |
519 | __libc_once_define (static, once); | |
520 | ||
521 | ||
522 | /* Read all configuration files found in the user-specified and the default | |
523 | path, but do it only "once" using __gconv_read_conf to do the actual | |
524 | work. This is the function that must be called when reading iconv | |
525 | configuration. */ | |
526 | void | |
527 | __gconv_load_conf (void) | |
528 | { | |
529 | __libc_once (once, __gconv_read_conf); | |
530 | } | |
531 | ||
d6204268 UD |
532 | |
533 | /* Free all resources if necessary. */ | |
c877418f | 534 | libc_freeres_fn (free_mem) |
d6204268 UD |
535 | { |
536 | if (__gconv_path_elem != NULL && __gconv_path_elem != &empty_path_elem) | |
537 | free ((void *) __gconv_path_elem); | |
538 | } |