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1 office 1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* xdgmime.c: XDG Mime Spec mime resolver. Based on version 0.11 of the spec.
3 *
4 * More info can be found at http://www.freedesktop.org/standards/
5 *
6 * Copyright (C) 2003,2004 Red Hat, Inc.
7 * Copyright (C) 2003,2004 Jonathan Blandford <jrb@alum.mit.edu>
8 *
9 * Licensed under the Academic Free License version 2.0
10 * Or under the following terms:
11 *
12 * This library is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU Lesser General Public
14 * License as published by the Free Software Foundation; either
15 * version 2 of the License, or (at your option) any later version.
16 *
17 * This library is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * Lesser General Public License for more details.
21 *
22 * You should have received a copy of the GNU Lesser General Public
23 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
24 */
25  
26 #ifdef HAVE_CONFIG_H
27 #include "config.h"
28 #endif
29  
30 #include "xdgmime.h"
31 #include "xdgmimeint.h"
32 #include "xdgmimeglob.h"
33 #include "xdgmimemagic.h"
34 #include "xdgmimealias.h"
35 #include "xdgmimeicon.h"
36 #include "xdgmimeparent.h"
37 #include "xdgmimecache.h"
38 #include <stdio.h>
39 #include <string.h>
40 #include <sys/stat.h>
41 #include <sys/types.h>
42 #include <sys/time.h>
43 #include <unistd.h>
44 #include <assert.h>
45  
46 typedef struct XdgDirTimeList XdgDirTimeList;
47 typedef struct XdgCallbackList XdgCallbackList;
48  
49 static int need_reread = TRUE;
50 static time_t last_stat_time = 0;
51  
52 static XdgGlobHash *global_hash = NULL;
53 static XdgMimeMagic *global_magic = NULL;
54 static XdgAliasList *alias_list = NULL;
55 static XdgParentList *parent_list = NULL;
56 static XdgDirTimeList *dir_time_list = NULL;
57 static XdgCallbackList *callback_list = NULL;
58 static XdgIconList *icon_list = NULL;
59 static XdgIconList *generic_icon_list = NULL;
60  
61 XdgMimeCache **_caches = NULL;
62 static int n_caches = 0;
63  
64 const char xdg_mime_type_unknown[] = "application/octet-stream";
65  
66  
67 enum
68 {
69 XDG_CHECKED_UNCHECKED,
70 XDG_CHECKED_VALID,
71 XDG_CHECKED_INVALID
72 };
73  
74 struct XdgDirTimeList
75 {
76 time_t mtime;
77 char *directory_name;
78 int checked;
79 XdgDirTimeList *next;
80 };
81  
82 struct XdgCallbackList
83 {
84 XdgCallbackList *next;
85 XdgCallbackList *prev;
86 int callback_id;
87 XdgMimeCallback callback;
88 void *data;
89 XdgMimeDestroy destroy;
90 };
91  
92 /* Function called by xdg_run_command_on_dirs. If it returns TRUE, further
93 * directories aren't looked at */
94 typedef int (*XdgDirectoryFunc) (const char *directory,
95 void *user_data);
96  
97 static void
98 xdg_dir_time_list_add (char *file_name,
99 time_t mtime)
100 {
101 XdgDirTimeList *list;
102  
103 for (list = dir_time_list; list; list = list->next)
104 {
105 if (strcmp (list->directory_name, file_name) == 0)
106 {
107 free (file_name);
108 return;
109 }
110 }
111  
112 list = calloc (1, sizeof (XdgDirTimeList));
113 list->checked = XDG_CHECKED_UNCHECKED;
114 list->directory_name = file_name;
115 list->mtime = mtime;
116 list->next = dir_time_list;
117 dir_time_list = list;
118 }
119  
120 static void
121 xdg_dir_time_list_free (XdgDirTimeList *list)
122 {
123 XdgDirTimeList *next;
124  
125 while (list)
126 {
127 next = list->next;
128 free (list->directory_name);
129 free (list);
130 list = next;
131 }
132 }
133  
134 static int
135 xdg_mime_init_from_directory (const char *directory)
136 {
137 char *file_name;
138 struct stat st;
139  
140 assert (directory != NULL);
141  
142 file_name = malloc (strlen (directory) + strlen ("/mime/mime.cache") + 1);
143 strcpy (file_name, directory); strcat (file_name, "/mime/mime.cache");
144 if (stat (file_name, &st) == 0)
145 {
146 XdgMimeCache *cache = _xdg_mime_cache_new_from_file (file_name);
147  
148 if (cache != NULL)
149 {
150 xdg_dir_time_list_add (file_name, st.st_mtime);
151  
152 _caches = realloc (_caches, sizeof (XdgMimeCache *) * (n_caches + 2));
153 _caches[n_caches] = cache;
154 _caches[n_caches + 1] = NULL;
155 n_caches++;
156  
157 return FALSE;
158 }
159 }
160 free (file_name);
161  
162 file_name = malloc (strlen (directory) + strlen ("/mime/globs2") + 1);
163 strcpy (file_name, directory); strcat (file_name, "/mime/globs2");
164 if (stat (file_name, &st) == 0)
165 {
166 _xdg_mime_glob_read_from_file (global_hash, file_name, TRUE);
167 xdg_dir_time_list_add (file_name, st.st_mtime);
168 }
169 else
170 {
171 free (file_name);
172 file_name = malloc (strlen (directory) + strlen ("/mime/globs") + 1);
173 strcpy (file_name, directory); strcat (file_name, "/mime/globs");
174 if (stat (file_name, &st) == 0)
175 {
176 _xdg_mime_glob_read_from_file (global_hash, file_name, FALSE);
177 xdg_dir_time_list_add (file_name, st.st_mtime);
178 }
179 else
180 {
181 free (file_name);
182 }
183 }
184  
185 file_name = malloc (strlen (directory) + strlen ("/mime/magic") + 1);
186 strcpy (file_name, directory); strcat (file_name, "/mime/magic");
187 if (stat (file_name, &st) == 0)
188 {
189 _xdg_mime_magic_read_from_file (global_magic, file_name);
190 xdg_dir_time_list_add (file_name, st.st_mtime);
191 }
192 else
193 {
194 free (file_name);
195 }
196  
197 file_name = malloc (strlen (directory) + strlen ("/mime/aliases") + 1);
198 strcpy (file_name, directory); strcat (file_name, "/mime/aliases");
199 _xdg_mime_alias_read_from_file (alias_list, file_name);
200 free (file_name);
201  
202 file_name = malloc (strlen (directory) + strlen ("/mime/subclasses") + 1);
203 strcpy (file_name, directory); strcat (file_name, "/mime/subclasses");
204 _xdg_mime_parent_read_from_file (parent_list, file_name);
205 free (file_name);
206  
207 file_name = malloc (strlen (directory) + strlen ("/mime/icons") + 1);
208 strcpy (file_name, directory); strcat (file_name, "/mime/icons");
209 _xdg_mime_icon_read_from_file (icon_list, file_name);
210 free (file_name);
211  
212 file_name = malloc (strlen (directory) + strlen ("/mime/generic-icons") + 1);
213 strcpy (file_name, directory); strcat (file_name, "/mime/generic-icons");
214 _xdg_mime_icon_read_from_file (generic_icon_list, file_name);
215 free (file_name);
216  
217 return FALSE; /* Keep processing */
218 }
219  
220 /* Runs a command on all the directories in the search path */
221 static void
222 xdg_run_command_on_dirs (XdgDirectoryFunc func,
223 void *user_data)
224 {
225 const char *xdg_data_home;
226 const char *xdg_data_dirs;
227 const char *ptr;
228  
229 xdg_data_home = getenv ("XDG_DATA_HOME");
230 if (xdg_data_home)
231 {
232 if ((func) (xdg_data_home, user_data))
233 return;
234 }
235 else
236 {
237 const char *home;
238  
239 home = getenv ("HOME");
240 if (home != NULL)
241 {
242 char *guessed_xdg_home;
243 int stop_processing;
244  
245 guessed_xdg_home = malloc (strlen (home) + strlen ("/.local/share/") + 1);
246 strcpy (guessed_xdg_home, home);
247 strcat (guessed_xdg_home, "/.local/share/");
248 stop_processing = (func) (guessed_xdg_home, user_data);
249 free (guessed_xdg_home);
250  
251 if (stop_processing)
252 return;
253 }
254 }
255  
256 xdg_data_dirs = getenv ("XDG_DATA_DIRS");
257 if (xdg_data_dirs == NULL)
258 xdg_data_dirs = "/usr/local/share/:/usr/share/";
259  
260 ptr = xdg_data_dirs;
261  
262 while (*ptr != '\000')
263 {
264 const char *end_ptr;
265 char *dir;
266 int len;
267 int stop_processing;
268  
269 end_ptr = ptr;
270 while (*end_ptr != ':' && *end_ptr != '\000')
271 end_ptr ++;
272  
273 if (end_ptr == ptr)
274 {
275 ptr++;
276 continue;
277 }
278  
279 if (*end_ptr == ':')
280 len = end_ptr - ptr;
281 else
282 len = end_ptr - ptr + 1;
283 dir = malloc (len + 1);
284 strncpy (dir, ptr, len);
285 dir[len] = '\0';
286 stop_processing = (func) (dir, user_data);
287 free (dir);
288  
289 if (stop_processing)
290 return;
291  
292 ptr = end_ptr;
293 }
294 }
295  
296 /* Checks file_path to make sure it has the same mtime as last time it was
297 * checked. If it has a different mtime, or if the file doesn't exist, it
298 * returns FALSE.
299 *
300 * FIXME: This doesn't protect against permission changes.
301 */
302 static int
303 xdg_check_file (const char *file_path,
304 int *exists)
305 {
306 struct stat st;
307  
308 /* If the file exists */
309 if (stat (file_path, &st) == 0)
310 {
311 XdgDirTimeList *list;
312  
313 if (exists)
314 *exists = TRUE;
315  
316 for (list = dir_time_list; list; list = list->next)
317 {
318 if (! strcmp (list->directory_name, file_path))
319 {
320 if (st.st_mtime == list->mtime)
321 list->checked = XDG_CHECKED_VALID;
322 else
323 list->checked = XDG_CHECKED_INVALID;
324  
325 return (list->checked != XDG_CHECKED_VALID);
326 }
327 }
328 return TRUE;
329 }
330  
331 if (exists)
332 *exists = FALSE;
333  
334 return FALSE;
335 }
336  
337 static int
338 xdg_check_dir (const char *directory,
339 int *invalid_dir_list)
340 {
341 int invalid, exists;
342 char *file_name;
343  
344 assert (directory != NULL);
345  
346 /* Check the mime.cache file */
347 file_name = malloc (strlen (directory) + strlen ("/mime/mime.cache") + 1);
348 strcpy (file_name, directory); strcat (file_name, "/mime/mime.cache");
349 invalid = xdg_check_file (file_name, &exists);
350 free (file_name);
351 if (invalid)
352 {
353 *invalid_dir_list = TRUE;
354 return TRUE;
355 }
356 else if (exists)
357 {
358 return FALSE;
359 }
360  
361 /* Check the globs file */
362 file_name = malloc (strlen (directory) + strlen ("/mime/globs") + 1);
363 strcpy (file_name, directory); strcat (file_name, "/mime/globs");
364 invalid = xdg_check_file (file_name, NULL);
365 free (file_name);
366 if (invalid)
367 {
368 *invalid_dir_list = TRUE;
369 return TRUE;
370 }
371  
372 /* Check the magic file */
373 file_name = malloc (strlen (directory) + strlen ("/mime/magic") + 1);
374 strcpy (file_name, directory); strcat (file_name, "/mime/magic");
375 invalid = xdg_check_file (file_name, NULL);
376 free (file_name);
377 if (invalid)
378 {
379 *invalid_dir_list = TRUE;
380 return TRUE;
381 }
382  
383 return FALSE; /* Keep processing */
384 }
385  
386 /* Walks through all the mime files stat()ing them to see if they've changed.
387 * Returns TRUE if they have. */
388 static int
389 xdg_check_dirs (void)
390 {
391 XdgDirTimeList *list;
392 int invalid_dir_list = FALSE;
393  
394 for (list = dir_time_list; list; list = list->next)
395 list->checked = XDG_CHECKED_UNCHECKED;
396  
397 xdg_run_command_on_dirs ((XdgDirectoryFunc) xdg_check_dir,
398 &invalid_dir_list);
399  
400 if (invalid_dir_list)
401 return TRUE;
402  
403 for (list = dir_time_list; list; list = list->next)
404 {
405 if (list->checked != XDG_CHECKED_VALID)
406 return TRUE;
407 }
408  
409 return FALSE;
410 }
411  
412 /* We want to avoid stat()ing on every single mime call, so we only look for
413 * newer files every 5 seconds. This will return TRUE if we need to reread the
414 * mime data from disk.
415 */
416 static int
417 xdg_check_time_and_dirs (void)
418 {
419 struct timeval tv;
420 time_t current_time;
421 int retval = FALSE;
422  
423 gettimeofday (&tv, NULL);
424 current_time = tv.tv_sec;
425  
426 if (current_time >= last_stat_time + 5)
427 {
428 retval = xdg_check_dirs ();
429 last_stat_time = current_time;
430 }
431  
432 return retval;
433 }
434  
435 /* Called in every public function. It reloads the hash function if need be.
436 */
437 static void
438 xdg_mime_init (void)
439 {
440 if (xdg_check_time_and_dirs ())
441 {
442 xdg_mime_shutdown ();
443 }
444  
445 if (need_reread)
446 {
447 global_hash = _xdg_glob_hash_new ();
448 global_magic = _xdg_mime_magic_new ();
449 alias_list = _xdg_mime_alias_list_new ();
450 parent_list = _xdg_mime_parent_list_new ();
451 icon_list = _xdg_mime_icon_list_new ();
452 generic_icon_list = _xdg_mime_icon_list_new ();
453  
454 xdg_run_command_on_dirs ((XdgDirectoryFunc) xdg_mime_init_from_directory,
455 NULL);
456  
457 need_reread = FALSE;
458 }
459 }
460  
461 const char *
462 xdg_mime_get_mime_type_for_data (const void *data,
463 size_t len,
464 int *result_prio)
465 {
466 const char *mime_type;
467  
468 xdg_mime_init ();
469  
470 if (_caches)
471 return _xdg_mime_cache_get_mime_type_for_data (data, len, result_prio);
472  
473 mime_type = _xdg_mime_magic_lookup_data (global_magic, data, len, result_prio, NULL, 0);
474  
475 if (mime_type)
476 return mime_type;
477  
478 return XDG_MIME_TYPE_UNKNOWN;
479 }
480  
481 #ifdef NOT_USED_IN_GIO
482  
483 const char *
484 xdg_mime_get_mime_type_for_file (const char *file_name,
485 struct stat *statbuf)
486 {
487 const char *mime_type;
488 /* currently, only a few globs occur twice, and none
489 * more often, so 5 seems plenty.
490 */
491 const char *mime_types[5];
492 FILE *file;
493 unsigned char *data;
494 int max_extent;
495 int bytes_read;
496 struct stat buf;
497 const char *base_name;
498 int n;
499  
500 if (file_name == NULL)
501 return NULL;
502 if (! _xdg_utf8_validate (file_name))
503 return NULL;
504  
505 xdg_mime_init ();
506  
507 if (_caches)
508 return _xdg_mime_cache_get_mime_type_for_file (file_name, statbuf);
509  
510 base_name = _xdg_get_base_name (file_name);
511 n = _xdg_glob_hash_lookup_file_name (global_hash, base_name, mime_types, 5);
512  
513 if (n == 1)
514 return mime_types[0];
515  
516 if (!statbuf)
517 {
518 if (stat (file_name, &buf) != 0)
519 return XDG_MIME_TYPE_UNKNOWN;
520  
521 statbuf = &buf;
522 }
523  
524 if (!S_ISREG (statbuf->st_mode))
525 return XDG_MIME_TYPE_UNKNOWN;
526  
527 /* FIXME: Need to make sure that max_extent isn't totally broken. This could
528 * be large and need getting from a stream instead of just reading it all
529 * in. */
530 max_extent = _xdg_mime_magic_get_buffer_extents (global_magic);
531 data = malloc (max_extent);
532 if (data == NULL)
533 return XDG_MIME_TYPE_UNKNOWN;
534  
535 file = fopen (file_name, "r");
536 if (file == NULL)
537 {
538 free (data);
539 return XDG_MIME_TYPE_UNKNOWN;
540 }
541  
542 bytes_read = fread (data, 1, max_extent, file);
543 if (ferror (file))
544 {
545 free (data);
546 fclose (file);
547 return XDG_MIME_TYPE_UNKNOWN;
548 }
549  
550 mime_type = _xdg_mime_magic_lookup_data (global_magic, data, bytes_read, NULL,
551 mime_types, n);
552  
553 free (data);
554 fclose (file);
555  
556 if (mime_type)
557 return mime_type;
558  
559 return XDG_MIME_TYPE_UNKNOWN;
560 }
561  
562 const char *
563 xdg_mime_get_mime_type_from_file_name (const char *file_name)
564 {
565 const char *mime_type;
566  
567 xdg_mime_init ();
568  
569 if (_caches)
570 return _xdg_mime_cache_get_mime_type_from_file_name (file_name);
571  
572 if (_xdg_glob_hash_lookup_file_name (global_hash, file_name, &mime_type, 1))
573 return mime_type;
574 else
575 return XDG_MIME_TYPE_UNKNOWN;
576 }
577  
578 #endif
579  
580 int
581 xdg_mime_get_mime_types_from_file_name (const char *file_name,
582 const char *mime_types[],
583 int n_mime_types)
584 {
585 xdg_mime_init ();
586  
587 if (_caches)
588 return _xdg_mime_cache_get_mime_types_from_file_name (file_name, mime_types, n_mime_types);
589  
590 return _xdg_glob_hash_lookup_file_name (global_hash, file_name, mime_types, n_mime_types);
591 }
592  
593 #ifdef NOT_USED_IN_GIO
594  
595 int
596 xdg_mime_is_valid_mime_type (const char *mime_type)
597 {
598 /* FIXME: We should make this a better test
599 */
600 return _xdg_utf8_validate (mime_type);
601 }
602  
603 #endif
604  
605 void
606 xdg_mime_shutdown (void)
607 {
608 XdgCallbackList *list;
609  
610 /* FIXME: Need to make this (and the whole library) thread safe */
611 if (dir_time_list)
612 {
613 xdg_dir_time_list_free (dir_time_list);
614 dir_time_list = NULL;
615 }
616  
617 if (global_hash)
618 {
619 _xdg_glob_hash_free (global_hash);
620 global_hash = NULL;
621 }
622 if (global_magic)
623 {
624 _xdg_mime_magic_free (global_magic);
625 global_magic = NULL;
626 }
627  
628 if (alias_list)
629 {
630 _xdg_mime_alias_list_free (alias_list);
631 alias_list = NULL;
632 }
633  
634 if (parent_list)
635 {
636 _xdg_mime_parent_list_free (parent_list);
637 parent_list = NULL;
638 }
639  
640 if (icon_list)
641 {
642 _xdg_mime_icon_list_free (icon_list);
643 icon_list = NULL;
644 }
645  
646 if (generic_icon_list)
647 {
648 _xdg_mime_icon_list_free (generic_icon_list);
649 generic_icon_list = NULL;
650 }
651  
652 if (_caches)
653 {
654 int i;
655  
656 for (i = 0; i < n_caches; i++)
657 _xdg_mime_cache_unref (_caches[i]);
658 free (_caches);
659 _caches = NULL;
660 n_caches = 0;
661 }
662  
663 for (list = callback_list; list; list = list->next)
664 (list->callback) (list->data);
665  
666 need_reread = TRUE;
667 }
668  
669 int
670 xdg_mime_get_max_buffer_extents (void)
671 {
672 xdg_mime_init ();
673  
674 if (_caches)
675 return _xdg_mime_cache_get_max_buffer_extents ();
676  
677 return _xdg_mime_magic_get_buffer_extents (global_magic);
678 }
679  
680 const char *
681 _xdg_mime_unalias_mime_type (const char *mime_type)
682 {
683 const char *lookup;
684  
685 if (_caches)
686 return _xdg_mime_cache_unalias_mime_type (mime_type);
687  
688 if ((lookup = _xdg_mime_alias_list_lookup (alias_list, mime_type)) != NULL)
689 return lookup;
690  
691 return mime_type;
692 }
693  
694 const char *
695 xdg_mime_unalias_mime_type (const char *mime_type)
696 {
697 xdg_mime_init ();
698  
699 return _xdg_mime_unalias_mime_type (mime_type);
700 }
701  
702 int
703 _xdg_mime_mime_type_equal (const char *mime_a,
704 const char *mime_b)
705 {
706 const char *unalias_a, *unalias_b;
707  
708 unalias_a = _xdg_mime_unalias_mime_type (mime_a);
709 unalias_b = _xdg_mime_unalias_mime_type (mime_b);
710  
711 if (strcmp (unalias_a, unalias_b) == 0)
712 return 1;
713  
714 return 0;
715 }
716  
717 int
718 xdg_mime_mime_type_equal (const char *mime_a,
719 const char *mime_b)
720 {
721 xdg_mime_init ();
722  
723 return _xdg_mime_mime_type_equal (mime_a, mime_b);
724 }
725  
726 int
727 xdg_mime_media_type_equal (const char *mime_a,
728 const char *mime_b)
729 {
730 char *sep;
731  
732 sep = strchr (mime_a, '/');
733  
734 if (sep && strncmp (mime_a, mime_b, sep - mime_a + 1) == 0)
735 return 1;
736  
737 return 0;
738 }
739  
740 #if 1
741 static int
742 ends_with (const char *str,
743 const char *suffix)
744 {
745 int length;
746 int suffix_length;
747  
748 length = strlen (str);
749 suffix_length = strlen (suffix);
750 if (length < suffix_length)
751 return 0;
752  
753 if (strcmp (str + length - suffix_length, suffix) == 0)
754 return 1;
755  
756 return 0;
757 }
758  
759 static int
760 xdg_mime_is_super_type (const char *mime)
761 {
762 return ends_with (mime, "/*");
763 }
764 #endif
765  
766 int
767 _xdg_mime_mime_type_subclass (const char *mime,
768 const char *base)
769 {
770 const char *umime, *ubase;
771 const char **parents;
772  
773 if (_caches)
774 return _xdg_mime_cache_mime_type_subclass (mime, base);
775  
776 umime = _xdg_mime_unalias_mime_type (mime);
777 ubase = _xdg_mime_unalias_mime_type (base);
778  
779 if (strcmp (umime, ubase) == 0)
780 return 1;
781  
782 #if 1
783 /* Handle supertypes */
784 if (xdg_mime_is_super_type (ubase) &&
785 xdg_mime_media_type_equal (umime, ubase))
786 return 1;
787 #endif
788  
789 /* Handle special cases text/plain and application/octet-stream */
790 if (strcmp (ubase, "text/plain") == 0 &&
791 strncmp (umime, "text/", 5) == 0)
792 return 1;
793  
794 if (strcmp (ubase, "application/octet-stream") == 0)
795 return 1;
796  
797 parents = _xdg_mime_parent_list_lookup (parent_list, umime);
798 for (; parents && *parents; parents++)
799 {
800 if (_xdg_mime_mime_type_subclass (*parents, ubase))
801 return 1;
802 }
803  
804 return 0;
805 }
806  
807 int
808 xdg_mime_mime_type_subclass (const char *mime,
809 const char *base)
810 {
811 xdg_mime_init ();
812  
813 return _xdg_mime_mime_type_subclass (mime, base);
814 }
815  
816 char **
817 xdg_mime_list_mime_parents (const char *mime)
818 {
819 const char *umime;
820 const char **parents;
821 char **result;
822 int i, n;
823  
824 xdg_mime_init ();
825  
826 if (_caches)
827 return _xdg_mime_cache_list_mime_parents (mime);
828  
829 umime = _xdg_mime_unalias_mime_type (mime);
830  
831 parents = _xdg_mime_parent_list_lookup (parent_list, umime);
832  
833 if (!parents)
834 return NULL;
835  
836 for (i = 0; parents[i]; i++) ;
837  
838 n = (i + 1) * sizeof (char *);
839 result = (char **) malloc (n);
840 memcpy (result, parents, n);
841  
842 return result;
843 }
844  
845 #ifdef NOT_USED_IN_GIO
846  
847 const char **
848 xdg_mime_get_mime_parents (const char *mime)
849 {
850 const char *umime;
851  
852 xdg_mime_init ();
853  
854 umime = _xdg_mime_unalias_mime_type (mime);
855  
856 return _xdg_mime_parent_list_lookup (parent_list, umime);
857 }
858  
859 void
860 xdg_mime_dump (void)
861 {
862 xdg_mime_init();
863  
864 printf ("*** ALIASES ***\n\n");
865 _xdg_mime_alias_list_dump (alias_list);
866 printf ("\n*** PARENTS ***\n\n");
867 _xdg_mime_parent_list_dump (parent_list);
868 printf ("\n*** CACHE ***\n\n");
869 _xdg_glob_hash_dump (global_hash);
870 printf ("\n*** GLOBS ***\n\n");
871 _xdg_glob_hash_dump (global_hash);
872 printf ("\n*** GLOBS REVERSE TREE ***\n\n");
873 _xdg_mime_cache_glob_dump ();
874 }
875  
876 #endif
877  
878 /* Registers a function to be called every time the mime database reloads its files
879 */
880 int
881 xdg_mime_register_reload_callback (XdgMimeCallback callback,
882 void *data,
883 XdgMimeDestroy destroy)
884 {
885 XdgCallbackList *list_el;
886 static int callback_id = 1;
887  
888 /* Make a new list element */
889 list_el = calloc (1, sizeof (XdgCallbackList));
890 list_el->callback_id = callback_id;
891 list_el->callback = callback;
892 list_el->data = data;
893 list_el->destroy = destroy;
894 list_el->next = callback_list;
895 if (list_el->next)
896 list_el->next->prev = list_el;
897  
898 callback_list = list_el;
899 callback_id ++;
900  
901 return callback_id - 1;
902 }
903  
904 #ifdef NOT_USED_IN_GIO
905  
906 void
907 xdg_mime_remove_callback (int callback_id)
908 {
909 XdgCallbackList *list;
910  
911 for (list = callback_list; list; list = list->next)
912 {
913 if (list->callback_id == callback_id)
914 {
915 if (list->next)
916 list->next = list->prev;
917  
918 if (list->prev)
919 list->prev->next = list->next;
920 else
921 callback_list = list->next;
922  
923 /* invoke the destroy handler */
924 (list->destroy) (list->data);
925 free (list);
926 return;
927 }
928 }
929 }
930  
931 #endif
932  
933 const char *
934 xdg_mime_get_icon (const char *mime)
935 {
936 xdg_mime_init ();
937  
938 if (_caches)
939 return _xdg_mime_cache_get_icon (mime);
940  
941 return _xdg_mime_icon_list_lookup (icon_list, mime);
942 }
943  
944 const char *
945 xdg_mime_get_generic_icon (const char *mime)
946 {
947 xdg_mime_init ();
948  
949 if (_caches)
950 return _xdg_mime_cache_get_generic_icon (mime);
951  
952 return _xdg_mime_icon_list_lookup (generic_icon_list, mime);
953 }