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1 | /* | |
2 | * $RCSId: xc/lib/fontconfig/src/fccache.c,v 1.12 2002/08/22 07:36:44 keithp Exp $ | |
3 | * | |
4 | * Copyright © 2000 Keith Packard | |
5 | * Copyright © 2005 Patrick Lam | |
6 | * | |
7 | * Permission to use, copy, modify, distribute, and sell this software and its | |
8 | * documentation for any purpose is hereby granted without fee, provided that | |
9 | * the above copyright notice appear in all copies and that both that | |
10 | * copyright notice and this permission notice appear in supporting | |
11 | * documentation, and that the name of Keith Packard not be used in | |
12 | * advertising or publicity pertaining to distribution of the software without | |
13 | * specific, written prior permission. Keith Packard makes no | |
14 | * representations about the suitability of this software for any purpose. It | |
15 | * is provided "as is" without express or implied warranty. | |
16 | * | |
17 | * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
18 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
19 | * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
20 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
21 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
22 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR | |
23 | * PERFORMANCE OF THIS SOFTWARE. | |
24 | */ | |
25 | ||
26 | #include <fcntl.h> | |
27 | #include <dirent.h> | |
28 | #include <sys/mman.h> | |
29 | #include <sys/utsname.h> | |
30 | #include <sys/types.h> | |
31 | #include <unistd.h> | |
32 | #include "fcint.h" | |
33 | ||
34 | #define ENDIAN_TEST 0x12345678 | |
35 | #define MACHINE_SIGNATURE_SIZE 9 + 5*19 + 1 | |
36 | ||
37 | static off_t | |
38 | FcCacheSkipToArch (int fd, const char * arch); | |
39 | ||
40 | static FcBool | |
41 | FcCacheCopyOld (int fd, int fd_orig, off_t start); | |
42 | ||
43 | static void * | |
44 | FcDirCacheProduce (FcFontSet *set, FcCache * metadata); | |
45 | ||
46 | static FcBool | |
47 | FcDirCacheConsume (int fd, const char * dir, FcFontSet *set); | |
48 | ||
49 | FcBool | |
50 | FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir); | |
51 | ||
52 | static int | |
53 | FcCacheNextOffset(off_t w); | |
54 | ||
55 | static char * | |
56 | FcCacheMachineSignature (void); | |
57 | ||
58 | static FcBool | |
59 | FcCacheHaveBank (int bank); | |
60 | ||
61 | static void | |
62 | FcCacheAddBankDir (int bank, const char * dir); | |
63 | ||
64 | #define FC_DBG_CACHE_REF 1024 | |
65 | ||
66 | static char * | |
67 | FcCacheReadString (int fd, char *dest, int len) | |
68 | { | |
69 | FcChar8 c; | |
70 | FcBool escape; | |
71 | int size; | |
72 | int i; | |
73 | ||
74 | if (len == 0) | |
75 | return 0; | |
76 | ||
77 | size = len; | |
78 | i = 0; | |
79 | escape = FcFalse; | |
80 | while (read (fd, &c, 1) == 1) | |
81 | { | |
82 | if (!escape) | |
83 | { | |
84 | switch (c) { | |
85 | case '"': | |
86 | c = '\0'; | |
87 | break; | |
88 | case '\\': | |
89 | escape = FcTrue; | |
90 | continue; | |
91 | } | |
92 | } | |
93 | if (i == size) | |
94 | { | |
95 | dest[i++] = 0; | |
96 | return dest; | |
97 | } | |
98 | dest[i++] = c; | |
99 | if (c == '\0') | |
100 | return dest; | |
101 | escape = FcFalse; | |
102 | } | |
103 | return 0; | |
104 | } | |
105 | ||
106 | static FcBool | |
107 | FcCacheWriteString (int fd, const char *chars) | |
108 | { | |
109 | if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1) | |
110 | return FcFalse; | |
111 | return FcTrue; | |
112 | } | |
113 | ||
114 | static void | |
115 | FcGlobalCacheDirDestroy (FcGlobalCacheDir *d) | |
116 | { | |
117 | FcMemFree (FC_MEM_STRING, strlen (d->name)+1); | |
118 | free (d->name); | |
119 | FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir)); | |
120 | free (d); | |
121 | } | |
122 | ||
123 | FcGlobalCache * | |
124 | FcGlobalCacheCreate (void) | |
125 | { | |
126 | FcGlobalCache *cache; | |
127 | ||
128 | cache = malloc (sizeof (FcGlobalCache)); | |
129 | if (!cache) | |
130 | return 0; | |
131 | FcMemAlloc (FC_MEM_CACHE, sizeof (FcGlobalCache)); | |
132 | cache->dirs = 0; | |
133 | cache->updated = FcFalse; | |
134 | cache->fd = -1; | |
135 | return cache; | |
136 | } | |
137 | ||
138 | void | |
139 | FcGlobalCacheDestroy (FcGlobalCache *cache) | |
140 | { | |
141 | FcGlobalCacheDir *d, *next; | |
142 | ||
143 | for (d = cache->dirs; d; d = next) | |
144 | { | |
145 | next = d->next; | |
146 | FcGlobalCacheDirDestroy (d); | |
147 | } | |
148 | FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache)); | |
149 | free (cache); | |
150 | } | |
151 | ||
152 | void | |
153 | FcGlobalCacheLoad (FcGlobalCache *cache, | |
154 | FcStrSet *staleDirs, | |
155 | const FcChar8 *cache_file) | |
156 | { | |
157 | char name_buf[8192]; | |
158 | FcGlobalCacheDir *d, *next; | |
159 | char * current_arch_machine_name; | |
160 | char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9]; | |
161 | off_t current_arch_start; | |
162 | ||
163 | struct stat cache_stat, dir_stat; | |
164 | ||
165 | if (stat ((char *) cache_file, &cache_stat) < 0) | |
166 | return; | |
167 | ||
168 | cache->fd = open ((char *) cache_file, O_RDONLY); | |
169 | if (cache->fd == -1) | |
170 | return; | |
171 | ||
172 | cache->updated = FcFalse; | |
173 | ||
174 | current_arch_machine_name = FcCacheMachineSignature (); | |
175 | current_arch_start = FcCacheSkipToArch(cache->fd, | |
176 | current_arch_machine_name); | |
177 | if (current_arch_start < 0) | |
178 | goto bail_and_destroy; | |
179 | ||
180 | lseek (cache->fd, current_arch_start, SEEK_SET); | |
181 | FcCacheReadString (cache->fd, candidate_arch_machine_name, | |
182 | sizeof (candidate_arch_machine_name)); | |
183 | if (strlen(candidate_arch_machine_name) == 0) | |
184 | goto bail_and_destroy; | |
185 | ||
186 | while (1) | |
187 | { | |
188 | off_t targ; | |
189 | ||
190 | FcCacheReadString (cache->fd, name_buf, sizeof (name_buf)); | |
191 | if (!strlen(name_buf)) | |
192 | break; | |
193 | ||
194 | if (stat ((char *) name_buf, &dir_stat) < 0 || | |
195 | dir_stat.st_mtime > cache_stat.st_mtime) | |
196 | { | |
197 | FcCache md; | |
198 | ||
199 | FcStrSetAdd (staleDirs, FcStrCopy ((FcChar8 *)name_buf)); | |
200 | read (cache->fd, &md, sizeof (FcCache)); | |
201 | lseek (cache->fd, FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + md.count, SEEK_SET); | |
202 | continue; | |
203 | } | |
204 | ||
205 | d = malloc (sizeof (FcGlobalCacheDir)); | |
206 | if (!d) | |
207 | goto bail1; | |
208 | ||
209 | d->next = cache->dirs; | |
210 | cache->dirs = d; | |
211 | ||
212 | d->name = (char *)FcStrCopy ((FcChar8 *)name_buf); | |
213 | d->ent = 0; | |
214 | d->offset = lseek (cache->fd, 0, SEEK_CUR); | |
215 | if (read (cache->fd, &d->metadata, sizeof (FcCache)) != sizeof (FcCache)) | |
216 | goto bail1; | |
217 | targ = FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + d->metadata.count; | |
218 | if (lseek (cache->fd, targ, SEEK_SET) != targ) | |
219 | goto bail1; | |
220 | } | |
221 | return; | |
222 | ||
223 | bail1: | |
224 | for (d = cache->dirs; d; d = next) | |
225 | { | |
226 | next = d->next; | |
227 | free (d); | |
228 | } | |
229 | cache->dirs = 0; | |
230 | ||
231 | close (cache->fd); | |
232 | cache->fd = -1; | |
233 | return; | |
234 | ||
235 | bail_and_destroy: | |
236 | close (cache->fd); | |
237 | cache->fd = -1; | |
238 | ||
239 | if (stat ((char *) cache_file, &cache_stat) == 0) | |
240 | unlink ((char *)cache_file); | |
241 | ||
242 | return; | |
243 | ||
244 | } | |
245 | ||
246 | FcBool | |
247 | FcGlobalCacheReadDir (FcFontSet *set, FcStrSet *dirs, FcGlobalCache * cache, const char *dir, FcConfig *config) | |
248 | { | |
249 | FcGlobalCacheDir *d; | |
250 | FcBool ret = FcFalse; | |
251 | ||
252 | if (cache->fd == -1) | |
253 | return FcFalse; | |
254 | ||
255 | for (d = cache->dirs; d; d = d->next) | |
256 | { | |
257 | if (strncmp (d->name, dir, strlen(dir)) == 0) | |
258 | { | |
259 | lseek (cache->fd, d->offset, SEEK_SET); | |
260 | if (!FcDirCacheConsume (cache->fd, dir, set)) | |
261 | return FcFalse; | |
262 | if (strcmp (d->name, dir) == 0) | |
263 | ret = FcTrue; | |
264 | } | |
265 | } | |
266 | ||
267 | return ret; | |
268 | } | |
269 | ||
270 | FcBool | |
271 | FcGlobalCacheUpdate (FcGlobalCache *cache, | |
272 | const char *name, | |
273 | FcFontSet *set) | |
274 | { | |
275 | FcGlobalCacheDir * d; | |
276 | ||
277 | if (!set->nfont) | |
278 | return FcTrue; | |
279 | ||
280 | for (d = cache->dirs; d; d = d->next) | |
281 | { | |
282 | if (strcmp(d->name, name) == 0) | |
283 | break; | |
284 | } | |
285 | ||
286 | if (!d) | |
287 | { | |
288 | d = malloc (sizeof (FcGlobalCacheDir)); | |
289 | if (!d) | |
290 | return FcFalse; | |
291 | d->next = cache->dirs; | |
292 | cache->dirs = d; | |
293 | } | |
294 | ||
295 | cache->updated = FcTrue; | |
296 | ||
297 | d->name = (char *)FcStrCopy ((FcChar8 *)name); | |
298 | d->ent = FcDirCacheProduce (set, &d->metadata); | |
299 | d->offset = 0; | |
300 | return FcTrue; | |
301 | } | |
302 | ||
303 | FcBool | |
304 | FcGlobalCacheSave (FcGlobalCache *cache, | |
305 | const FcChar8 *cache_file) | |
306 | { | |
307 | int fd, fd_orig; | |
308 | FcGlobalCacheDir *dir; | |
309 | FcAtomic *atomic; | |
310 | off_t current_arch_start = 0, truncate_to; | |
311 | char * current_arch_machine_name, * header; | |
312 | ||
313 | if (!cache->updated) | |
314 | return FcTrue; | |
315 | ||
316 | #if defined (HAVE_GETUID) && defined (HAVE_GETEUID) | |
317 | /* Set-UID programs can't safely update the cache */ | |
318 | if (getuid () != geteuid ()) | |
319 | return FcFalse; | |
320 | #endif | |
321 | ||
322 | atomic = FcAtomicCreate (cache_file); | |
323 | if (!atomic) | |
324 | return FcFalse; | |
325 | ||
326 | if (!FcAtomicLock (atomic)) | |
327 | goto bail1; | |
328 | fd = open ((char *) FcAtomicNewFile(atomic), O_RDWR | O_CREAT, | |
329 | S_IRUSR | S_IWUSR); | |
330 | if (fd == -1) | |
331 | goto bail2; | |
332 | ||
333 | fd_orig = open ((char *) FcAtomicOrigFile(atomic), O_RDONLY); | |
334 | ||
335 | current_arch_machine_name = FcCacheMachineSignature (); | |
336 | if (fd_orig == -1) | |
337 | current_arch_start = 0; | |
338 | else | |
339 | current_arch_start = FcCacheSkipToArch (fd_orig, | |
340 | current_arch_machine_name); | |
341 | ||
342 | if (current_arch_start < 0) | |
343 | current_arch_start = FcCacheNextOffset (lseek(fd_orig, 0, SEEK_END)); | |
344 | ||
345 | if (!FcCacheCopyOld(fd, fd_orig, current_arch_start)) | |
346 | goto bail3; | |
347 | ||
348 | close (fd_orig); | |
349 | fd_orig = -1; | |
350 | ||
351 | current_arch_start = lseek(fd, 0, SEEK_CUR); | |
352 | if (ftruncate (fd, current_arch_start) == -1) | |
353 | goto bail3; | |
354 | ||
355 | header = malloc (10 + strlen (current_arch_machine_name)); | |
356 | if (!header) | |
357 | goto bail3; | |
358 | ||
359 | truncate_to = current_arch_start + strlen(current_arch_machine_name) + 11; | |
360 | for (dir = cache->dirs; dir; dir = dir->next) | |
361 | { | |
362 | truncate_to += strlen(dir->name) + 1; | |
363 | truncate_to += sizeof (FcCache); | |
364 | truncate_to = FcCacheNextOffset (current_arch_start + truncate_to); | |
365 | truncate_to += dir->metadata.count; | |
366 | } | |
367 | truncate_to -= current_arch_start; | |
368 | ||
369 | sprintf (header, "%8x ", (int)truncate_to); | |
370 | strcat (header, current_arch_machine_name); | |
371 | if (!FcCacheWriteString (fd, header)) | |
372 | goto bail4; | |
373 | ||
374 | for (dir = cache->dirs; dir; dir = dir->next) | |
375 | { | |
376 | if (dir->ent) | |
377 | { | |
378 | FcCacheWriteString (fd, dir->name); | |
379 | write (fd, &dir->metadata, sizeof(FcCache)); | |
380 | lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)), SEEK_SET); | |
381 | write (fd, dir->ent, dir->metadata.count); | |
382 | free (dir->ent); | |
383 | } | |
384 | } | |
385 | FcCacheWriteString (fd, ""); | |
386 | ||
387 | if (close (fd) == -1) | |
388 | goto bail25; | |
389 | ||
390 | if (!FcAtomicReplaceOrig (atomic)) | |
391 | goto bail25; | |
392 | ||
393 | FcAtomicUnlock (atomic); | |
394 | FcAtomicDestroy (atomic); | |
395 | ||
396 | cache->updated = FcFalse; | |
397 | return FcTrue; | |
398 | ||
399 | bail4: | |
400 | free (header); | |
401 | bail3: | |
402 | if (fd_orig != -1) | |
403 | close (fd_orig); | |
404 | ||
405 | close (fd); | |
406 | bail25: | |
407 | FcAtomicDeleteNew (atomic); | |
408 | bail2: | |
409 | FcAtomicUnlock (atomic); | |
410 | bail1: | |
411 | FcAtomicDestroy (atomic); | |
412 | return FcFalse; | |
413 | } | |
414 | ||
415 | #define PAGESIZE 8192 | |
416 | /* | |
417 | * Find the next presumably-mmapable offset after the supplied file | |
418 | * position. | |
419 | */ | |
420 | static int | |
421 | FcCacheNextOffset(off_t w) | |
422 | { | |
423 | if (w % PAGESIZE == 0) | |
424 | return w; | |
425 | else | |
426 | return ((w / PAGESIZE)+1)*PAGESIZE; | |
427 | } | |
428 | ||
429 | /* return the address of the segment for the provided arch, | |
430 | * or -1 if arch not found */ | |
431 | static off_t | |
432 | FcCacheSkipToArch (int fd, const char * arch) | |
433 | { | |
434 | char candidate_arch_machine_name_count[MACHINE_SIGNATURE_SIZE + 9]; | |
435 | char * candidate_arch; | |
436 | off_t current_arch_start = 0; | |
437 | ||
438 | /* skip arches that are not the current arch */ | |
439 | while (1) | |
440 | { | |
441 | long bs; | |
442 | ||
443 | if (lseek (fd, current_arch_start, SEEK_SET) != current_arch_start) | |
444 | return -1; | |
445 | ||
446 | if (FcCacheReadString (fd, candidate_arch_machine_name_count, | |
447 | sizeof (candidate_arch_machine_name_count)) == 0) | |
448 | return -1; | |
449 | if (!strlen(candidate_arch_machine_name_count)) | |
450 | return -1; | |
451 | bs = strtol(candidate_arch_machine_name_count, &candidate_arch, 16); | |
452 | ||
453 | // count = 0 should probably be distinguished from the !bs condition | |
454 | if (!bs || bs < strlen (candidate_arch_machine_name_count)) | |
455 | return -1; | |
456 | ||
457 | candidate_arch++; /* skip leading space */ | |
458 | ||
459 | if (strcmp (candidate_arch, arch)==0) | |
460 | return current_arch_start; | |
461 | current_arch_start += bs; | |
462 | } | |
463 | ||
464 | return -1; | |
465 | } | |
466 | ||
467 | /* Cuts out the segment at the file pointer (moves everything else | |
468 | * down to cover it), and leaves the file pointer at the end of the | |
469 | * file. */ | |
470 | static FcBool | |
471 | FcCacheCopyOld (int fd, int fd_orig, off_t start) | |
472 | { | |
473 | char * buf = malloc (8192); | |
474 | char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9]; | |
475 | long bs; | |
476 | int c, bytes_skipped; | |
477 | off_t loc; | |
478 | ||
479 | if (!buf) | |
480 | return FcFalse; | |
481 | ||
482 | loc = 0; | |
483 | lseek (fd, 0, SEEK_SET); lseek (fd_orig, 0, SEEK_SET); | |
484 | do | |
485 | { | |
486 | int b = 8192; | |
487 | if (loc + b > start) | |
488 | b = start - loc; | |
489 | ||
490 | if ((c = read (fd_orig, buf, b)) <= 0) | |
491 | break; | |
492 | if (write (fd, buf, c) < 0) | |
493 | goto bail; | |
494 | ||
495 | loc += c; | |
496 | } | |
497 | while (c > 0); | |
498 | ||
499 | lseek (fd, start, SEEK_SET); | |
500 | if (FcCacheReadString (fd, candidate_arch_machine_name, | |
501 | sizeof (candidate_arch_machine_name)) == 0) | |
502 | goto done; | |
503 | if (!strlen(candidate_arch_machine_name)) | |
504 | goto done; | |
505 | ||
506 | bs = strtol(candidate_arch_machine_name, 0, 16); | |
507 | if (bs == 0) | |
508 | goto done; | |
509 | ||
510 | bytes_skipped = 0; | |
511 | do | |
512 | { | |
513 | lseek (fd, start+bs+bytes_skipped, SEEK_SET); | |
514 | if ((c = read (fd, buf, 8192)) <= 0) | |
515 | break; | |
516 | lseek (fd, start+bytes_skipped, SEEK_SET); | |
517 | if (write (fd, buf, c) < 0) | |
518 | goto bail; | |
519 | bytes_skipped += c; | |
520 | } | |
521 | while (c > 0); | |
522 | lseek (fd, start+bytes_skipped, SEEK_SET); | |
523 | ||
524 | done: | |
525 | free (buf); | |
526 | return FcTrue; | |
527 | ||
528 | bail: | |
529 | free (buf); | |
530 | return FcFalse; | |
531 | } | |
532 | ||
533 | /* Does not check that the cache has the appropriate arch section. */ | |
534 | FcBool | |
535 | FcDirCacheValid (const FcChar8 *dir) | |
536 | { | |
537 | FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); | |
538 | struct stat file_stat, dir_stat; | |
539 | ||
540 | if (stat ((char *) dir, &dir_stat) < 0) | |
541 | { | |
542 | FcStrFree (cache_file); | |
543 | return FcFalse; | |
544 | } | |
545 | if (stat ((char *) cache_file, &file_stat) < 0) | |
546 | { | |
547 | FcStrFree (cache_file); | |
548 | return FcFalse; | |
549 | } | |
550 | ||
551 | FcStrFree (cache_file); | |
552 | /* | |
553 | * If the directory has been modified more recently than | |
554 | * the cache file, the cache is not valid | |
555 | */ | |
556 | if (dir_stat.st_mtime - file_stat.st_mtime > 0) | |
557 | return FcFalse; | |
558 | return FcTrue; | |
559 | } | |
560 | ||
561 | /* Assumes that the cache file in 'dir' exists. | |
562 | * Checks that the cache has the appropriate arch section. */ | |
563 | FcBool | |
564 | FcDirCacheHasCurrentArch (const FcChar8 *dir) | |
565 | { | |
566 | FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); | |
567 | int fd; | |
568 | off_t current_arch_start; | |
569 | char *current_arch_machine_name; | |
570 | ||
571 | current_arch_machine_name = FcCacheMachineSignature(); | |
572 | fd = open ((char *)cache_file, O_RDONLY); | |
573 | if (fd == -1) | |
574 | return FcFalse; | |
575 | ||
576 | current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name); | |
577 | close (fd); | |
578 | ||
579 | if (current_arch_start < 0) | |
580 | return FcFalse; | |
581 | ||
582 | return FcTrue; | |
583 | } | |
584 | ||
585 | FcBool | |
586 | FcDirCacheUnlink (const FcChar8 *dir) | |
587 | { | |
588 | FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); | |
589 | struct stat cache_stat; | |
590 | ||
591 | if (stat ((char *) cache_file, &cache_stat) == 0 && | |
592 | unlink ((char *)cache_file) != 0) | |
593 | { | |
594 | FcStrFree (cache_file); | |
595 | return FcFalse; | |
596 | } | |
597 | ||
598 | FcStrFree (cache_file); | |
599 | return FcTrue; | |
600 | } | |
601 | ||
602 | static int | |
603 | FcCacheReadDirs (FcConfig * config, FcGlobalCache * cache, | |
604 | FcStrList *list, FcFontSet * set) | |
605 | { | |
606 | int ret = 0; | |
607 | FcChar8 *dir; | |
608 | FcChar8 *file, *base; | |
609 | FcStrSet *subdirs; | |
610 | FcStrList *sublist; | |
611 | struct stat statb; | |
612 | ||
613 | /* | |
614 | * Read in the results from 'list'. | |
615 | */ | |
616 | while ((dir = FcStrListNext (list))) | |
617 | { | |
618 | /* freed below */ | |
619 | file = (FcChar8 *) malloc (strlen ((char *) dir) + 1 + FC_MAX_FILE_LEN + 1); | |
620 | if (!file) | |
621 | return FcFalse; | |
622 | ||
623 | strcpy ((char *) file, (char *) dir); | |
624 | strcat ((char *) file, "/"); | |
625 | base = file + strlen ((char *) file); | |
626 | ||
627 | subdirs = FcStrSetCreate (); | |
628 | if (!subdirs) | |
629 | { | |
630 | fprintf (stderr, "Can't create directory set\n"); | |
631 | ret++; | |
632 | free (file); | |
633 | continue; | |
634 | } | |
635 | ||
636 | if (access ((char *) dir, X_OK) < 0) | |
637 | { | |
638 | switch (errno) { | |
639 | case ENOENT: | |
640 | case ENOTDIR: | |
641 | case EACCES: | |
642 | break; | |
643 | default: | |
644 | fprintf (stderr, "\"%s\": ", dir); | |
645 | perror (""); | |
646 | ret++; | |
647 | } | |
648 | FcStrSetDestroy (subdirs); | |
649 | free (file); | |
650 | continue; | |
651 | } | |
652 | if (stat ((char *) dir, &statb) == -1) | |
653 | { | |
654 | fprintf (stderr, "\"%s\": ", dir); | |
655 | perror (""); | |
656 | FcStrSetDestroy (subdirs); | |
657 | ret++; | |
658 | free (file); | |
659 | continue; | |
660 | } | |
661 | if (!S_ISDIR (statb.st_mode)) | |
662 | { | |
663 | fprintf (stderr, "\"%s\": not a directory, skipping\n", dir); | |
664 | FcStrSetDestroy (subdirs); | |
665 | free (file); | |
666 | continue; | |
667 | } | |
668 | if (!FcDirCacheValid (dir) || !FcDirCacheRead (set, subdirs, dir)) | |
669 | { | |
670 | if (FcDebug () & FC_DBG_FONTSET) | |
671 | printf ("cache scan dir %s\n", dir); | |
672 | ||
673 | FcDirScanConfig (set, subdirs, cache, | |
674 | config->blanks, dir, FcFalse, config); | |
675 | } | |
676 | sublist = FcStrListCreate (subdirs); | |
677 | FcStrSetDestroy (subdirs); | |
678 | if (!sublist) | |
679 | { | |
680 | fprintf (stderr, "Can't create subdir list in \"%s\"\n", dir); | |
681 | ret++; | |
682 | free (file); | |
683 | continue; | |
684 | } | |
685 | ret += FcCacheReadDirs (config, cache, sublist, set); | |
686 | free (file); | |
687 | } | |
688 | FcStrListDone (list); | |
689 | return ret; | |
690 | } | |
691 | ||
692 | FcFontSet * | |
693 | FcCacheRead (FcConfig *config, FcGlobalCache * cache) | |
694 | { | |
695 | FcFontSet * s = FcFontSetCreate(); | |
696 | if (!s) | |
697 | return 0; | |
698 | ||
699 | if (FcCacheReadDirs (config, cache, FcConfigGetConfigDirs (config), s)) | |
700 | goto bail; | |
701 | ||
702 | return s; | |
703 | ||
704 | bail: | |
705 | FcFontSetDestroy (s); | |
706 | return 0; | |
707 | } | |
708 | ||
709 | /* read serialized state from the cache file */ | |
710 | FcBool | |
711 | FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir) | |
712 | { | |
713 | char *cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); | |
714 | int fd; | |
715 | char * current_arch_machine_name; | |
716 | char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE]; | |
717 | off_t current_arch_start = 0; | |
718 | char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1]; | |
719 | ||
720 | if (!cache_file) | |
721 | goto bail; | |
722 | ||
723 | current_arch_machine_name = FcCacheMachineSignature(); | |
724 | fd = open(cache_file, O_RDONLY); | |
725 | if (fd == -1) | |
726 | goto bail; | |
727 | ||
728 | current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name); | |
729 | if (current_arch_start < 0) | |
730 | goto bail1; | |
731 | ||
732 | lseek (fd, current_arch_start, SEEK_SET); | |
733 | if (FcCacheReadString (fd, candidate_arch_machine_name, | |
734 | sizeof (candidate_arch_machine_name)) == 0) | |
735 | goto bail1; | |
736 | ||
737 | while (strlen(FcCacheReadString (fd, subdirName, sizeof (subdirName))) > 0) | |
738 | FcStrSetAdd (dirs, (FcChar8 *)subdirName); | |
739 | ||
740 | if (!FcDirCacheConsume (fd, (const char *)dir, set)) | |
741 | goto bail1; | |
742 | ||
743 | close(fd); | |
744 | free (cache_file); | |
745 | return FcTrue; | |
746 | ||
747 | bail1: | |
748 | close (fd); | |
749 | bail: | |
750 | free (cache_file); | |
751 | return FcFalse; | |
752 | } | |
753 | ||
754 | static FcBool | |
755 | FcDirCacheConsume (int fd, const char * dir, FcFontSet *set) | |
756 | { | |
757 | FcCache metadata; | |
758 | void * current_dir_block; | |
759 | off_t pos; | |
760 | ||
761 | read(fd, &metadata, sizeof(FcCache)); | |
762 | if (metadata.magic != FC_CACHE_MAGIC) | |
763 | return FcFalse; | |
764 | ||
765 | if (!metadata.count) | |
766 | return FcTrue; | |
767 | ||
768 | pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)); | |
769 | current_dir_block = mmap (0, metadata.count, | |
770 | PROT_READ, MAP_SHARED, fd, pos); | |
771 | if (current_dir_block == MAP_FAILED) | |
772 | return FcFalse; | |
773 | ||
774 | if (!FcFontSetUnserialize (metadata, set, current_dir_block)) | |
775 | return FcFalse; | |
776 | ||
777 | FcCacheAddBankDir (metadata.bank, dir); | |
778 | ||
779 | return FcTrue; | |
780 | } | |
781 | ||
782 | static void * | |
783 | FcDirCacheProduce (FcFontSet *set, FcCache *metadata) | |
784 | { | |
785 | void * current_dir_block, * final_dir_block; | |
786 | static unsigned int rand_state = 0; | |
787 | int bank; | |
788 | ||
789 | if (!rand_state) | |
790 | rand_state = time(0L); | |
791 | bank = rand_r(&rand_state); | |
792 | ||
793 | while (FcCacheHaveBank(bank)) | |
794 | bank = rand_r(&rand_state); | |
795 | ||
796 | memset (metadata, 0, sizeof(FcCache)); | |
797 | FcFontSetNewBank(); | |
798 | metadata->count = FcFontSetNeededBytes (set); | |
799 | metadata->magic = FC_CACHE_MAGIC; | |
800 | metadata->bank = bank; | |
801 | ||
802 | if (!metadata->count) /* not a failure, no fonts to write */ | |
803 | return 0; | |
804 | ||
805 | current_dir_block = malloc (metadata->count); | |
806 | if (!current_dir_block) | |
807 | goto bail; | |
808 | final_dir_block = FcFontSetDistributeBytes (metadata, current_dir_block); | |
809 | ||
810 | if ((char *)current_dir_block + metadata->count != final_dir_block) | |
811 | goto bail; | |
812 | ||
813 | if (!FcFontSetSerialize (bank, set)) | |
814 | goto bail; | |
815 | ||
816 | return current_dir_block; | |
817 | ||
818 | bail: | |
819 | free (current_dir_block); | |
820 | return 0; | |
821 | } | |
822 | ||
823 | /* write serialized state to the cache file */ | |
824 | FcBool | |
825 | FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir) | |
826 | { | |
827 | FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); | |
828 | int fd, fd_orig, i, dirs_count; | |
829 | FcAtomic *atomic; | |
830 | FcCache metadata; | |
831 | off_t current_arch_start = 0, truncate_to; | |
832 | ||
833 | char *current_arch_machine_name, * header; | |
834 | void *current_dir_block; | |
835 | ||
836 | if (!cache_file) | |
837 | goto bail; | |
838 | ||
839 | current_dir_block = FcDirCacheProduce (set, &metadata); | |
840 | ||
841 | if (metadata.count && !current_dir_block) | |
842 | goto bail0; | |
843 | ||
844 | if (FcDebug () & FC_DBG_CACHE) | |
845 | printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file); | |
846 | ||
847 | atomic = FcAtomicCreate (cache_file); | |
848 | if (!atomic) | |
849 | goto bail0; | |
850 | ||
851 | if (!FcAtomicLock (atomic)) | |
852 | goto bail1; | |
853 | ||
854 | fd_orig = open((char *)FcAtomicOrigFile (atomic), O_RDONLY, 0666); | |
855 | ||
856 | fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT, 0666); | |
857 | if (fd == -1) | |
858 | goto bail2; | |
859 | ||
860 | current_arch_machine_name = FcCacheMachineSignature (); | |
861 | current_arch_start = 0; | |
862 | ||
863 | if (fd_orig != -1) | |
864 | current_arch_start = | |
865 | FcCacheSkipToArch(fd_orig, current_arch_machine_name); | |
866 | ||
867 | if (current_arch_start < 0) | |
868 | current_arch_start = FcCacheNextOffset (lseek(fd_orig, 0, SEEK_END)); | |
869 | ||
870 | if (fd_orig != -1 && !FcCacheCopyOld(fd, fd_orig, current_arch_start)) | |
871 | goto bail3; | |
872 | ||
873 | if (fd_orig != -1) | |
874 | close (fd_orig); | |
875 | ||
876 | current_arch_start = lseek(fd, 0, SEEK_CUR); | |
877 | if (ftruncate (fd, current_arch_start) == -1) | |
878 | goto bail3; | |
879 | ||
880 | /* allocate space for subdir names in this block */ | |
881 | dirs_count = 0; | |
882 | for (i = 0; i < dirs->size; i++) | |
883 | dirs_count += strlen((char *)dirs->strs[i]) + 1; | |
884 | dirs_count ++; | |
885 | ||
886 | /* now write the address of the next offset */ | |
887 | truncate_to = FcCacheNextOffset (FcCacheNextOffset (current_arch_start + sizeof (FcCache) + dirs_count) + metadata.count) - current_arch_start; | |
888 | header = malloc (10 + strlen (current_arch_machine_name)); | |
889 | if (!header) | |
890 | goto bail3; | |
891 | sprintf (header, "%8x ", (int)truncate_to); | |
892 | strcat (header, current_arch_machine_name); | |
893 | if (!FcCacheWriteString (fd, header)) | |
894 | goto bail4; | |
895 | ||
896 | for (i = 0; i < dirs->size; i++) | |
897 | FcCacheWriteString (fd, (char *)dirs->strs[i]); | |
898 | FcCacheWriteString (fd, ""); | |
899 | ||
900 | write (fd, &metadata, sizeof(FcCache)); | |
901 | if (metadata.count) | |
902 | { | |
903 | lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_END)), SEEK_SET); | |
904 | write (fd, current_dir_block, metadata.count); | |
905 | free (current_dir_block); | |
906 | } | |
907 | ||
908 | /* this actually serves to pad out the cache file, if needed */ | |
909 | if (ftruncate (fd, current_arch_start + truncate_to) == -1) | |
910 | goto bail4; | |
911 | ||
912 | close(fd); | |
913 | if (!FcAtomicReplaceOrig(atomic)) | |
914 | goto bail4; | |
915 | FcAtomicUnlock (atomic); | |
916 | FcAtomicDestroy (atomic); | |
917 | return FcTrue; | |
918 | ||
919 | bail4: | |
920 | free (header); | |
921 | bail3: | |
922 | close (fd); | |
923 | bail2: | |
924 | FcAtomicUnlock (atomic); | |
925 | bail1: | |
926 | FcAtomicDestroy (atomic); | |
927 | bail0: | |
928 | unlink ((char *)cache_file); | |
929 | free (cache_file); | |
930 | if (current_dir_block) | |
931 | free (current_dir_block); | |
932 | bail: | |
933 | return FcFalse; | |
934 | } | |
935 | ||
936 | static char * | |
937 | FcCacheMachineSignature () | |
938 | { | |
939 | static char buf[MACHINE_SIGNATURE_SIZE]; | |
940 | int magic = ENDIAN_TEST; | |
941 | char * m = (char *)&magic; | |
942 | ||
943 | sprintf (buf, "%2x%2x%2x%2x " | |
944 | "%4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x " | |
945 | "%4x %4x %4x %4x %4x %4x %4x\n", | |
946 | m[0], m[1], m[2], m[3], | |
947 | (unsigned int)sizeof (char), | |
948 | (unsigned int)sizeof (char *), | |
949 | (unsigned int)sizeof (int), | |
950 | (unsigned int)sizeof (FcPattern), | |
951 | (unsigned int)sizeof (FcPatternEltPtr), | |
952 | (unsigned int)sizeof (struct _FcPatternElt *), | |
953 | (unsigned int)sizeof (FcPatternElt), | |
954 | (unsigned int)sizeof (FcObjectPtr), | |
955 | (unsigned int)sizeof (FcValueListPtr), | |
956 | (unsigned int)sizeof (FcValue), | |
957 | (unsigned int)sizeof (FcValueBinding), | |
958 | (unsigned int)sizeof (struct _FcValueList *), | |
959 | (unsigned int)sizeof (FcCharSet), | |
960 | (unsigned int)sizeof (FcCharLeaf **), | |
961 | (unsigned int)sizeof (FcChar16 *), | |
962 | (unsigned int)sizeof (FcChar16), | |
963 | (unsigned int)sizeof (FcCharLeaf), | |
964 | (unsigned int)sizeof (FcChar32), | |
965 | (unsigned int)sizeof (FcCache)); | |
966 | ||
967 | return buf; | |
968 | } | |
969 | ||
970 | static int banks_ptr = 0, banks_alloc = 0; | |
971 | static int * bankId = 0, * bankIdx = 0; | |
972 | static const char ** bankDirs = 0; | |
973 | ||
974 | static FcBool | |
975 | FcCacheHaveBank (int bank) | |
976 | { | |
977 | int i; | |
978 | ||
979 | if (bank < FC_BANK_FIRST) | |
980 | return FcTrue; | |
981 | ||
982 | for (i = 0; i < banks_ptr; i++) | |
983 | if (bankId[i] == bank) | |
984 | return FcTrue; | |
985 | ||
986 | return FcFalse; | |
987 | } | |
988 | ||
989 | int | |
990 | FcCacheBankToIndex (int bank) | |
991 | { | |
992 | int i, j; | |
993 | ||
994 | for (i = 0; i < banks_ptr; i++) | |
995 | if (bankId[bankIdx[i]] == bank) | |
996 | { | |
997 | int t = bankIdx[i]; | |
998 | ||
999 | for (j = i; j > 0; j--) | |
1000 | bankIdx[j] = bankIdx[j-1]; | |
1001 | bankIdx[0] = t; | |
1002 | return t; | |
1003 | } | |
1004 | ||
1005 | if (banks_ptr >= banks_alloc) | |
1006 | { | |
1007 | int * b, * bidx; | |
1008 | const char ** bds; | |
1009 | ||
1010 | b = realloc (bankId, (banks_alloc + 4) * sizeof(int)); | |
1011 | if (!b) | |
1012 | return -1; | |
1013 | bankId = b; | |
1014 | ||
1015 | bidx = realloc (bankIdx, (banks_alloc + 4) * sizeof(int)); | |
1016 | if (!bidx) | |
1017 | return -1; | |
1018 | bankIdx = bidx; | |
1019 | ||
1020 | bds = realloc (bankDirs, (banks_alloc + 4) * sizeof (char *)); | |
1021 | if (!bds) | |
1022 | return -1; | |
1023 | bankDirs = bds; | |
1024 | ||
1025 | banks_alloc += 4; | |
1026 | } | |
1027 | ||
1028 | i = banks_ptr++; | |
1029 | bankId[i] = bank; | |
1030 | bankIdx[i] = i; | |
1031 | return i; | |
1032 | } | |
1033 | ||
1034 | static void | |
1035 | FcCacheAddBankDir (int bank, const char * dir) | |
1036 | { | |
1037 | int bi = FcCacheBankToIndex (bank); | |
1038 | ||
1039 | if (bi < 0) | |
1040 | return; | |
1041 | ||
1042 | bankDirs[bi] = (const char *)FcStrCopy ((FcChar8 *)dir); | |
1043 | } | |
1044 | ||
1045 | const char * | |
1046 | FcCacheFindBankDir (int bank) | |
1047 | { | |
1048 | int bi = FcCacheBankToIndex (bank); | |
1049 | return bankDirs[bi]; | |
1050 | } | |
1051 |