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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 <string.h> | |
29 | #include <sys/mman.h> | |
30 | #include <sys/utsname.h> | |
31 | #include <sys/types.h> | |
32 | #include <unistd.h> | |
33 | #include "fcint.h" | |
34 | #include <unistd.h> | |
35 | ||
36 | #define ENDIAN_TEST 0x12345678 | |
37 | #define MACHINE_SIGNATURE_SIZE 9 + 5*20 + 1 | |
38 | ||
39 | static int | |
40 | FcDirCacheOpen (const FcChar8 * dir); | |
41 | ||
42 | static char * | |
43 | FcDirCacheHashName (char * cache_file, int collisions); | |
44 | ||
45 | static off_t | |
46 | FcCacheSkipToArch (int fd, const char * arch); | |
47 | ||
48 | static FcBool | |
49 | FcCacheCopyOld (int fd, int fd_orig, off_t start); | |
50 | ||
51 | static void * | |
52 | FcDirCacheProduce (FcFontSet *set, FcCache * metadata); | |
53 | ||
54 | static FcBool | |
55 | FcDirCacheConsume (int fd, const char * dir, FcFontSet *set, FcConfig *config); | |
56 | ||
57 | static int | |
58 | FcCacheNextOffset(off_t w); | |
59 | ||
60 | static char * | |
61 | FcCacheMachineSignature (void); | |
62 | ||
63 | static FcBool | |
64 | FcCacheHaveBank (int bank); | |
65 | ||
66 | static void | |
67 | FcCacheAddBankDir (int bank, const char * dir); | |
68 | ||
69 | struct MD5Context { | |
70 | FcChar32 buf[4]; | |
71 | FcChar32 bits[2]; | |
72 | unsigned char in[64]; | |
73 | }; | |
74 | ||
75 | static void MD5Init(struct MD5Context *ctx); | |
76 | static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len); | |
77 | static void MD5Final(unsigned char digest[16], struct MD5Context *ctx); | |
78 | static void MD5Transform(FcChar32 buf[4], FcChar32 in[16]); | |
79 | ||
80 | #define FC_DBG_CACHE_REF 1024 | |
81 | ||
82 | static char * | |
83 | FcCacheReadString (int fd, char *dest, int len) | |
84 | { | |
85 | FcChar8 c; | |
86 | FcBool escape; | |
87 | int size; | |
88 | int i; | |
89 | ||
90 | if (len == 0) | |
91 | return 0; | |
92 | ||
93 | size = len; | |
94 | i = 0; | |
95 | escape = FcFalse; | |
96 | while (read (fd, &c, 1) == 1) | |
97 | { | |
98 | if (!escape) | |
99 | { | |
100 | switch (c) { | |
101 | case '"': | |
102 | c = '\0'; | |
103 | break; | |
104 | case '\\': | |
105 | escape = FcTrue; | |
106 | continue; | |
107 | } | |
108 | } | |
109 | if (i == size) | |
110 | { | |
111 | dest[i++] = 0; | |
112 | return dest; | |
113 | } | |
114 | dest[i++] = c; | |
115 | if (c == '\0') | |
116 | return dest; | |
117 | escape = FcFalse; | |
118 | } | |
119 | return 0; | |
120 | } | |
121 | ||
122 | static void | |
123 | FcCacheSkipString (int fd) | |
124 | { | |
125 | FcChar8 c; | |
126 | FcBool escape; | |
127 | ||
128 | escape = FcFalse; | |
129 | while (read (fd, &c, 1) == 1) | |
130 | { | |
131 | if (!escape) | |
132 | { | |
133 | switch (c) { | |
134 | case '"': | |
135 | c = '\0'; | |
136 | break; | |
137 | case '\\': | |
138 | escape = FcTrue; | |
139 | continue; | |
140 | } | |
141 | } | |
142 | if (c == '\0') | |
143 | return; | |
144 | escape = FcFalse; | |
145 | } | |
146 | return; | |
147 | } | |
148 | ||
149 | static FcBool | |
150 | FcCacheWriteString (int fd, const char *chars) | |
151 | { | |
152 | if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1) | |
153 | return FcFalse; | |
154 | return FcTrue; | |
155 | } | |
156 | ||
157 | static void | |
158 | FcGlobalCacheDirDestroy (FcGlobalCacheDir *d) | |
159 | { | |
160 | FcStrSetDestroy (d->subdirs); | |
161 | FcMemFree (FC_MEM_STRING, strlen (d->name)+1); | |
162 | free (d->name); | |
163 | FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir)); | |
164 | free (d); | |
165 | } | |
166 | ||
167 | FcGlobalCache * | |
168 | FcGlobalCacheCreate (void) | |
169 | { | |
170 | FcGlobalCache *cache; | |
171 | ||
172 | cache = malloc (sizeof (FcGlobalCache)); | |
173 | if (!cache) | |
174 | return 0; | |
175 | FcMemAlloc (FC_MEM_CACHE, sizeof (FcGlobalCache)); | |
176 | cache->dirs = 0; | |
177 | cache->updated = FcFalse; | |
178 | cache->fd = -1; | |
179 | return cache; | |
180 | } | |
181 | ||
182 | void | |
183 | FcGlobalCacheDestroy (FcGlobalCache *cache) | |
184 | { | |
185 | FcGlobalCacheDir *d, *next; | |
186 | ||
187 | for (d = cache->dirs; d; d = next) | |
188 | { | |
189 | next = d->next; | |
190 | FcGlobalCacheDirDestroy (d); | |
191 | } | |
192 | FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache)); | |
193 | free (cache); | |
194 | } | |
195 | ||
196 | void | |
197 | FcGlobalCacheLoad (FcGlobalCache *cache, | |
198 | FcStrSet *staleDirs, | |
199 | const FcChar8 *cache_file, | |
200 | FcConfig *config) | |
201 | { | |
202 | char name_buf[FC_MAX_FILE_LEN]; | |
203 | FcGlobalCacheDir *d, *next; | |
204 | FcFileTime config_time = FcConfigModifiedTime (config); | |
205 | char * current_arch_machine_name; | |
206 | char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9]; | |
207 | off_t current_arch_start; | |
208 | ||
209 | struct stat cache_stat, dir_stat; | |
210 | char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1]; | |
211 | ||
212 | if (stat ((char *) cache_file, &cache_stat) < 0) | |
213 | return; | |
214 | ||
215 | cache->fd = open ((char *) cache_file, O_RDONLY); | |
216 | if (cache->fd == -1) | |
217 | return; | |
218 | ||
219 | cache->updated = FcFalse; | |
220 | ||
221 | if (!FcCacheReadString (cache->fd, name_buf, sizeof (name_buf))) | |
222 | goto bail_and_destroy; | |
223 | if (strcmp (name_buf, FC_GLOBAL_MAGIC_COOKIE) != 0) | |
224 | goto bail_and_destroy; | |
225 | ||
226 | current_arch_machine_name = FcCacheMachineSignature (); | |
227 | current_arch_start = FcCacheSkipToArch(cache->fd, | |
228 | current_arch_machine_name); | |
229 | if (current_arch_start < 0) | |
230 | goto bail_and_destroy; | |
231 | ||
232 | lseek (cache->fd, current_arch_start, SEEK_SET); | |
233 | if (!FcCacheReadString (cache->fd, candidate_arch_machine_name, | |
234 | sizeof (candidate_arch_machine_name))) | |
235 | goto bail_and_destroy; | |
236 | if (strlen(candidate_arch_machine_name) == 0) | |
237 | goto bail_and_destroy; | |
238 | ||
239 | while (1) | |
240 | { | |
241 | off_t targ; | |
242 | ||
243 | if (!FcCacheReadString (cache->fd, name_buf, sizeof (name_buf)) || | |
244 | !strlen(name_buf)) | |
245 | break; | |
246 | ||
247 | /* Directory must be older than the global cache file; also | |
248 | cache must be newer than the config file. */ | |
249 | if (stat ((char *) name_buf, &dir_stat) < 0 || | |
250 | dir_stat.st_mtime > cache_stat.st_mtime || | |
251 | (config_time.set && cache_stat.st_mtime < config_time.time)) | |
252 | { | |
253 | FcCache md; | |
254 | off_t off; | |
255 | ||
256 | FcStrSetAdd (staleDirs, FcStrCopy ((FcChar8 *)name_buf)); | |
257 | if (read (cache->fd, &md, sizeof (FcCache)) != sizeof(FcCache)) | |
258 | { | |
259 | perror ("read metadata"); | |
260 | goto bail1; | |
261 | } | |
262 | off = FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + md.count; | |
263 | if (lseek (cache->fd, off, SEEK_SET) != off) { | |
264 | perror ("lseek"); | |
265 | goto bail1; | |
266 | } | |
267 | continue; | |
268 | } | |
269 | ||
270 | d = malloc (sizeof (FcGlobalCacheDir)); | |
271 | if (!d) | |
272 | goto bail1; | |
273 | ||
274 | d->next = cache->dirs; | |
275 | cache->dirs = d; | |
276 | ||
277 | d->name = (char *)FcStrCopy ((FcChar8 *)name_buf); | |
278 | d->ent = 0; | |
279 | ||
280 | d->subdirs = FcStrSetCreate(); | |
281 | do | |
282 | { | |
283 | if (!FcCacheReadString (cache->fd, subdirName, | |
284 | sizeof (subdirName)) || | |
285 | !strlen (subdirName)) | |
286 | break; | |
287 | FcStrSetAdd (d->subdirs, (FcChar8 *)subdirName); | |
288 | } while (1); | |
289 | ||
290 | d->offset = lseek (cache->fd, 0, SEEK_CUR); | |
291 | if (read (cache->fd, &d->metadata, sizeof (FcCache)) != sizeof (FcCache)) | |
292 | goto bail1; | |
293 | targ = FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + d->metadata.count; | |
294 | if (lseek (cache->fd, targ, SEEK_SET) != targ) | |
295 | goto bail1; | |
296 | } | |
297 | return; | |
298 | ||
299 | bail1: | |
300 | for (d = cache->dirs; d; d = next) | |
301 | { | |
302 | next = d->next; | |
303 | free (d); | |
304 | } | |
305 | cache->dirs = 0; | |
306 | ||
307 | close (cache->fd); | |
308 | cache->fd = -1; | |
309 | return; | |
310 | ||
311 | bail_and_destroy: | |
312 | close (cache->fd); | |
313 | cache->fd = -1; | |
314 | ||
315 | if (stat ((char *) cache_file, &cache_stat) == 0) | |
316 | unlink ((char *)cache_file); | |
317 | ||
318 | return; | |
319 | ||
320 | } | |
321 | ||
322 | FcBool | |
323 | FcGlobalCacheReadDir (FcFontSet *set, FcStrSet *dirs, FcGlobalCache * cache, const char *dir, FcConfig *config) | |
324 | { | |
325 | FcGlobalCacheDir *d; | |
326 | FcBool ret = FcFalse; | |
327 | int i; | |
328 | ||
329 | if (cache->fd == -1) | |
330 | return FcFalse; | |
331 | ||
332 | if (!(dir = (char *)FcConfigNormalizeFontDir (config, (FcChar8 *)dir))) | |
333 | return FcFalse; /* non-existing directory */ | |
334 | ||
335 | for (d = cache->dirs; d; d = d->next) | |
336 | { | |
337 | if (strncmp (d->name, dir, strlen(dir)) == 0) | |
338 | { | |
339 | lseek (cache->fd, d->offset, SEEK_SET); | |
340 | if (!FcDirCacheConsume (cache->fd, d->name, set, config)) | |
341 | return FcFalse; | |
342 | ||
343 | if (strcmp (d->name, dir) == 0) | |
344 | { | |
345 | for (i = 0; i < d->subdirs->num; i++) | |
346 | FcStrSetAdd (dirs, (FcChar8 *)d->subdirs->strs[i]); | |
347 | ||
348 | ret = FcTrue; | |
349 | } | |
350 | } | |
351 | } | |
352 | ||
353 | return ret; | |
354 | } | |
355 | ||
356 | FcBool | |
357 | FcGlobalCacheUpdate (FcGlobalCache *cache, | |
358 | FcStrSet *dirs, | |
359 | const char *name, | |
360 | FcFontSet *set, | |
361 | FcConfig *config) | |
362 | { | |
363 | FcGlobalCacheDir *d; | |
364 | int i; | |
365 | ||
366 | name = (char *)FcConfigNormalizeFontDir (config, (FcChar8 *)name); | |
367 | for (d = cache->dirs; d; d = d->next) | |
368 | { | |
369 | if (strcmp(d->name, name) == 0) | |
370 | break; | |
371 | } | |
372 | ||
373 | if (!d) | |
374 | { | |
375 | d = malloc (sizeof (FcGlobalCacheDir)); | |
376 | if (!d) | |
377 | return FcFalse; | |
378 | d->next = cache->dirs; | |
379 | cache->dirs = d; | |
380 | } | |
381 | ||
382 | cache->updated = FcTrue; | |
383 | ||
384 | d->name = (char *)FcStrCopy ((FcChar8 *)name); | |
385 | d->ent = FcDirCacheProduce (set, &d->metadata); | |
386 | d->offset = 0; | |
387 | d->subdirs = FcStrSetCreate(); | |
388 | for (i = 0; i < dirs->num; i++) | |
389 | FcStrSetAdd (d->subdirs, dirs->strs[i]); | |
390 | return FcTrue; | |
391 | } | |
392 | ||
393 | FcBool | |
394 | FcGlobalCacheSave (FcGlobalCache *cache, | |
395 | const FcChar8 *cache_file, | |
396 | FcConfig *config) | |
397 | { | |
398 | int fd, fd_orig, i; | |
399 | FcGlobalCacheDir *dir; | |
400 | FcAtomic *atomic; | |
401 | off_t current_arch_start = 0, truncate_to; | |
402 | char * current_arch_machine_name, * header; | |
403 | ||
404 | if (!cache->updated) | |
405 | return FcTrue; | |
406 | ||
407 | #if defined (HAVE_GETUID) && defined (HAVE_GETEUID) | |
408 | /* Set-UID programs can't safely update the cache */ | |
409 | if (getuid () != geteuid ()) | |
410 | return FcFalse; | |
411 | #endif | |
412 | ||
413 | atomic = FcAtomicCreate (cache_file); | |
414 | if (!atomic) | |
415 | return FcFalse; | |
416 | ||
417 | if (!FcAtomicLock (atomic)) | |
418 | goto bail1; | |
419 | fd = open ((char *) FcAtomicNewFile(atomic), O_RDWR | O_CREAT, | |
420 | S_IRUSR | S_IWUSR); | |
421 | if (fd == -1) | |
422 | goto bail2; | |
423 | FcCacheWriteString (fd, FC_GLOBAL_MAGIC_COOKIE); | |
424 | ||
425 | fd_orig = open ((char *) FcAtomicOrigFile(atomic), O_RDONLY); | |
426 | ||
427 | current_arch_machine_name = FcCacheMachineSignature (); | |
428 | if (fd_orig == -1) | |
429 | current_arch_start = 0; | |
430 | else | |
431 | current_arch_start = FcCacheSkipToArch (fd_orig, | |
432 | current_arch_machine_name); | |
433 | ||
434 | if (current_arch_start < 0) | |
435 | { | |
436 | off_t i = lseek(fd_orig, 0, SEEK_END); | |
437 | if (i < strlen (FC_GLOBAL_MAGIC_COOKIE)+1) | |
438 | i = strlen (FC_GLOBAL_MAGIC_COOKIE)+1; | |
439 | current_arch_start = FcCacheNextOffset (i); | |
440 | } | |
441 | ||
442 | if (!FcCacheCopyOld(fd, fd_orig, current_arch_start)) | |
443 | goto bail3; | |
444 | ||
445 | close (fd_orig); | |
446 | fd_orig = -1; | |
447 | ||
448 | current_arch_start = lseek(fd, 0, SEEK_CUR); | |
449 | if (ftruncate (fd, current_arch_start) == -1) | |
450 | goto bail3; | |
451 | ||
452 | header = malloc (10 + strlen (current_arch_machine_name)); | |
453 | if (!header) | |
454 | goto bail3; | |
455 | ||
456 | truncate_to = current_arch_start + strlen(current_arch_machine_name) + 11; | |
457 | for (dir = cache->dirs; dir; dir = dir->next) | |
458 | { | |
459 | truncate_to += strlen(dir->name) + 1; | |
460 | truncate_to += sizeof (FcCache); | |
461 | truncate_to = FcCacheNextOffset (truncate_to); | |
462 | truncate_to += dir->metadata.count; | |
463 | ||
464 | for (i = 0; i < dir->subdirs->size; i++) | |
465 | truncate_to += strlen((char *)dir->subdirs->strs[i]) + 1; | |
466 | truncate_to ++; | |
467 | } | |
468 | truncate_to -= current_arch_start; | |
469 | ||
470 | sprintf (header, "%8x ", (int)truncate_to); | |
471 | strcat (header, current_arch_machine_name); | |
472 | if (!FcCacheWriteString (fd, header)) | |
473 | goto bail4; | |
474 | ||
475 | for (dir = cache->dirs; dir; dir = dir->next) | |
476 | { | |
477 | if (dir->name) | |
478 | { | |
479 | const char * d = (const char *)FcConfigNormalizeFontDir (config, (const FcChar8 *)dir->name); | |
480 | off_t off; | |
481 | ||
482 | FcCacheWriteString (fd, d); | |
483 | ||
484 | for (i = 0; i < dir->subdirs->size; i++) | |
485 | FcCacheWriteString (fd, (char *)dir->subdirs->strs[i]); | |
486 | FcCacheWriteString (fd, ""); | |
487 | ||
488 | if (write (fd, &dir->metadata, sizeof(FcCache)) != sizeof(FcCache)) | |
489 | { | |
490 | perror ("write metadata"); | |
491 | free (dir->ent); | |
492 | continue; | |
493 | } | |
494 | off = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)); | |
495 | if (lseek (fd, off, SEEK_SET) != off) | |
496 | { | |
497 | perror ("lseek"); | |
498 | free (dir->ent); | |
499 | continue; | |
500 | } | |
501 | if (write (fd, dir->ent, dir->metadata.count) != dir->metadata.count) | |
502 | { | |
503 | perror ("write dirent"); | |
504 | free (dir->ent); | |
505 | continue; | |
506 | } | |
507 | free (dir->ent); | |
508 | } | |
509 | } | |
510 | FcCacheWriteString (fd, ""); | |
511 | ||
512 | if (close (fd) == -1) | |
513 | goto bail25; | |
514 | ||
515 | if (!FcAtomicReplaceOrig (atomic)) | |
516 | goto bail25; | |
517 | ||
518 | FcAtomicUnlock (atomic); | |
519 | FcAtomicDestroy (atomic); | |
520 | ||
521 | cache->updated = FcFalse; | |
522 | return FcTrue; | |
523 | ||
524 | bail4: | |
525 | free (header); | |
526 | bail3: | |
527 | if (fd_orig != -1) | |
528 | close (fd_orig); | |
529 | ||
530 | close (fd); | |
531 | bail25: | |
532 | FcAtomicDeleteNew (atomic); | |
533 | bail2: | |
534 | FcAtomicUnlock (atomic); | |
535 | bail1: | |
536 | FcAtomicDestroy (atomic); | |
537 | return FcFalse; | |
538 | } | |
539 | ||
540 | /* | |
541 | * Find the next presumably-mmapable offset after the supplied file | |
542 | * position. | |
543 | */ | |
544 | static int | |
545 | FcCacheNextOffset(off_t w) | |
546 | { | |
547 | static long pagesize = -1; | |
548 | if (pagesize == -1) | |
549 | pagesize = sysconf(_SC_PAGESIZE); | |
550 | if (w % pagesize == 0) | |
551 | return w; | |
552 | else | |
553 | return ((w / pagesize)+1)*pagesize; | |
554 | } | |
555 | ||
556 | /* return the address of the segment for the provided arch, | |
557 | * or -1 if arch not found */ | |
558 | static off_t | |
559 | FcCacheSkipToArch (int fd, const char * arch) | |
560 | { | |
561 | char candidate_arch_machine_name_count[MACHINE_SIGNATURE_SIZE + 9]; | |
562 | char * candidate_arch; | |
563 | off_t current_arch_start = 0; | |
564 | ||
565 | lseek (fd, 0, SEEK_SET); | |
566 | FcCacheSkipString (fd); | |
567 | current_arch_start = lseek (fd, 0, SEEK_CUR); | |
568 | ||
569 | /* skip arches that are not the current arch */ | |
570 | while (1) | |
571 | { | |
572 | long bs; | |
573 | ||
574 | if (lseek (fd, current_arch_start, SEEK_SET) != current_arch_start) | |
575 | return -1; | |
576 | ||
577 | if (FcCacheReadString (fd, candidate_arch_machine_name_count, | |
578 | sizeof (candidate_arch_machine_name_count)) == 0) | |
579 | return -1; | |
580 | if (!strlen(candidate_arch_machine_name_count)) | |
581 | return -1; | |
582 | bs = strtol(candidate_arch_machine_name_count, &candidate_arch, 16); | |
583 | ||
584 | // count = 0 should probably be distinguished from the !bs condition | |
585 | if (!bs || bs < strlen (candidate_arch_machine_name_count)) | |
586 | return -1; | |
587 | ||
588 | candidate_arch++; /* skip leading space */ | |
589 | ||
590 | if (strcmp (candidate_arch, arch)==0) | |
591 | return current_arch_start; | |
592 | current_arch_start += bs; | |
593 | } | |
594 | ||
595 | return -1; | |
596 | } | |
597 | ||
598 | /* Cuts out the segment at the file pointer (moves everything else | |
599 | * down to cover it), and leaves the file pointer at the end of the | |
600 | * file. */ | |
601 | static FcBool | |
602 | FcCacheCopyOld (int fd, int fd_orig, off_t start) | |
603 | { | |
604 | char * buf = malloc (8192); | |
605 | char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9]; | |
606 | long bs; | |
607 | int c, bytes_skipped; | |
608 | off_t loc; | |
609 | ||
610 | if (!buf) | |
611 | return FcFalse; | |
612 | ||
613 | loc = 0; | |
614 | lseek (fd, 0, SEEK_SET); lseek (fd_orig, 0, SEEK_SET); | |
615 | do | |
616 | { | |
617 | int b = 8192; | |
618 | if (loc + b > start) | |
619 | b = start - loc; | |
620 | ||
621 | if ((c = read (fd_orig, buf, b)) <= 0) | |
622 | break; | |
623 | if (write (fd, buf, c) < 0) | |
624 | goto bail; | |
625 | ||
626 | loc += c; | |
627 | } | |
628 | while (c > 0); | |
629 | ||
630 | lseek (fd, start, SEEK_SET); | |
631 | if (FcCacheReadString (fd, candidate_arch_machine_name, | |
632 | sizeof (candidate_arch_machine_name)) == 0) | |
633 | goto done; | |
634 | if (!strlen(candidate_arch_machine_name)) | |
635 | goto done; | |
636 | ||
637 | bs = strtol(candidate_arch_machine_name, 0, 16); | |
638 | if (bs == 0) | |
639 | goto done; | |
640 | ||
641 | bytes_skipped = 0; | |
642 | do | |
643 | { | |
644 | lseek (fd, start+bs+bytes_skipped, SEEK_SET); | |
645 | if ((c = read (fd, buf, 8192)) <= 0) | |
646 | break; | |
647 | lseek (fd, start+bytes_skipped, SEEK_SET); | |
648 | if (write (fd, buf, c) < 0) | |
649 | goto bail; | |
650 | bytes_skipped += c; | |
651 | } | |
652 | while (c > 0); | |
653 | lseek (fd, start+bytes_skipped, SEEK_SET); | |
654 | ||
655 | done: | |
656 | free (buf); | |
657 | return FcTrue; | |
658 | ||
659 | bail: | |
660 | free (buf); | |
661 | return FcFalse; | |
662 | } | |
663 | ||
664 | /* Does not check that the cache has the appropriate arch section. */ | |
665 | /* Also, this can be fooled if the original location has a stale | |
666 | * cache, and the hashed location has an up-to-date cache. Oh well, | |
667 | * sucks to be you in that case! */ | |
668 | FcBool | |
669 | FcDirCacheValid (const FcChar8 *dir) | |
670 | { | |
671 | struct stat file_stat, dir_stat; | |
672 | int fd; | |
673 | ||
674 | if (stat ((char *) dir, &dir_stat) < 0) | |
675 | return FcFalse; | |
676 | ||
677 | fd = FcDirCacheOpen (dir); | |
678 | ||
679 | if (fd < 0) | |
680 | goto bail; | |
681 | if (fstat (fd, &file_stat) < 0) | |
682 | goto bail; | |
683 | ||
684 | close (fd); | |
685 | ||
686 | /* | |
687 | * If the directory has been modified more recently than | |
688 | * the cache file, the cache is not valid | |
689 | */ | |
690 | if (dir_stat.st_mtime > file_stat.st_mtime) | |
691 | return FcFalse; | |
692 | ||
693 | return FcTrue; | |
694 | ||
695 | bail: | |
696 | close (fd); | |
697 | return FcFalse; | |
698 | } | |
699 | ||
700 | /* Assumes that the cache file in 'dir' exists. | |
701 | * Checks that the cache has the appropriate arch section. */ | |
702 | FcBool | |
703 | FcDirCacheHasCurrentArch (const FcChar8 *dir) | |
704 | { | |
705 | int fd; | |
706 | off_t current_arch_start; | |
707 | char *current_arch_machine_name; | |
708 | ||
709 | fd = FcDirCacheOpen (dir); | |
710 | if (fd < 0) | |
711 | goto bail; | |
712 | ||
713 | current_arch_machine_name = FcCacheMachineSignature(); | |
714 | current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name); | |
715 | close (fd); | |
716 | ||
717 | if (current_arch_start < 0) | |
718 | return FcFalse; | |
719 | ||
720 | return FcTrue; | |
721 | ||
722 | bail: | |
723 | return FcFalse; | |
724 | } | |
725 | ||
726 | FcBool | |
727 | FcDirCacheUnlink (const FcChar8 *dir, FcConfig *config) | |
728 | { | |
729 | char *cache_file; | |
730 | char *cache_hashed = 0; | |
731 | int fd, collisions; | |
732 | struct stat cache_stat; | |
733 | char name_buf[FC_MAX_FILE_LEN]; | |
734 | ||
735 | dir = FcConfigNormalizeFontDir (config, dir); | |
736 | cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); | |
737 | if (!cache_file) | |
738 | return FcFalse; | |
739 | ||
740 | /* First remove normal cache file. */ | |
741 | if (stat ((char *) cache_file, &cache_stat) == 0 && | |
742 | unlink ((char *)cache_file) != 0) | |
743 | goto bail; | |
744 | ||
745 | /* Next remove any applicable hashed files. */ | |
746 | fd = -1; collisions = 0; | |
747 | do | |
748 | { | |
749 | if (cache_hashed) | |
750 | FcStrFree ((FcChar8 *)cache_hashed); | |
751 | ||
752 | cache_hashed = FcDirCacheHashName (cache_file, collisions++); | |
753 | if (!cache_hashed) | |
754 | goto bail; | |
755 | ||
756 | if (fd > 0) | |
757 | close (fd); | |
758 | fd = open(cache_hashed, O_RDONLY); | |
759 | if (fd == -1) | |
760 | { | |
761 | FcStrFree ((FcChar8 *)cache_file); | |
762 | return FcTrue; | |
763 | } | |
764 | ||
765 | if (!FcCacheReadString (fd, name_buf, sizeof (name_buf)) || !strlen(name_buf)) | |
766 | { | |
767 | FcStrFree ((FcChar8 *)cache_hashed); | |
768 | goto bail; | |
769 | } | |
770 | } while (strcmp (name_buf, cache_file) != 0); | |
771 | ||
772 | close (fd); | |
773 | ||
774 | if (stat ((char *) cache_hashed, &cache_stat) == 0 && | |
775 | unlink ((char *)cache_hashed) != 0) | |
776 | { | |
777 | FcStrFree ((FcChar8 *)cache_hashed); | |
778 | goto bail; | |
779 | } | |
780 | ||
781 | FcStrFree ((FcChar8 *)cache_file); | |
782 | FcStrFree ((FcChar8 *)cache_hashed); | |
783 | return FcTrue; | |
784 | ||
785 | bail: | |
786 | FcStrFree ((FcChar8 *)cache_file); | |
787 | return FcFalse; | |
788 | } | |
789 | ||
790 | static int | |
791 | FcCacheReadDirs (FcConfig * config, FcGlobalCache * cache, | |
792 | FcStrList *list, FcFontSet * set) | |
793 | { | |
794 | int ret = 0; | |
795 | FcChar8 *dir; | |
796 | FcChar8 *file, *base; | |
797 | FcStrSet *subdirs; | |
798 | FcStrList *sublist; | |
799 | struct stat statb; | |
800 | ||
801 | /* | |
802 | * Read in the results from 'list'. | |
803 | */ | |
804 | while ((dir = FcStrListNext (list))) | |
805 | { | |
806 | if (!FcConfigAcceptFilename (config, dir)) | |
807 | continue; | |
808 | ||
809 | /* freed below */ | |
810 | file = (FcChar8 *) malloc (strlen ((char *) dir) + 1 + FC_MAX_FILE_LEN + 1); | |
811 | if (!file) | |
812 | return FcFalse; | |
813 | ||
814 | strcpy ((char *) file, (char *) dir); | |
815 | strcat ((char *) file, "/"); | |
816 | base = file + strlen ((char *) file); | |
817 | ||
818 | subdirs = FcStrSetCreate (); | |
819 | if (!subdirs) | |
820 | { | |
821 | fprintf (stderr, "Can't create directory set\n"); | |
822 | ret++; | |
823 | free (file); | |
824 | continue; | |
825 | } | |
826 | ||
827 | if (access ((char *) dir, X_OK) < 0) | |
828 | { | |
829 | switch (errno) { | |
830 | case ENOENT: | |
831 | case ENOTDIR: | |
832 | case EACCES: | |
833 | break; | |
834 | default: | |
835 | fprintf (stderr, "\"%s\": ", dir); | |
836 | perror (""); | |
837 | ret++; | |
838 | } | |
839 | FcStrSetDestroy (subdirs); | |
840 | free (file); | |
841 | continue; | |
842 | } | |
843 | if (stat ((char *) dir, &statb) == -1) | |
844 | { | |
845 | fprintf (stderr, "\"%s\": ", dir); | |
846 | perror (""); | |
847 | FcStrSetDestroy (subdirs); | |
848 | ret++; | |
849 | free (file); | |
850 | continue; | |
851 | } | |
852 | if (!S_ISDIR (statb.st_mode)) | |
853 | { | |
854 | fprintf (stderr, "\"%s\": not a directory, skipping\n", dir); | |
855 | FcStrSetDestroy (subdirs); | |
856 | free (file); | |
857 | continue; | |
858 | } | |
859 | if (!FcDirCacheValid (dir) || !FcDirCacheRead (set, subdirs, dir, config)) | |
860 | { | |
861 | if (FcDebug () & FC_DBG_FONTSET) | |
862 | printf ("cache scan dir %s\n", dir); | |
863 | ||
864 | FcDirScanConfig (set, subdirs, cache, | |
865 | config->blanks, dir, FcFalse, config); | |
866 | } | |
867 | sublist = FcStrListCreate (subdirs); | |
868 | FcStrSetDestroy (subdirs); | |
869 | if (!sublist) | |
870 | { | |
871 | fprintf (stderr, "Can't create subdir list in \"%s\"\n", dir); | |
872 | ret++; | |
873 | free (file); | |
874 | continue; | |
875 | } | |
876 | ret += FcCacheReadDirs (config, cache, sublist, set); | |
877 | free (file); | |
878 | } | |
879 | FcStrListDone (list); | |
880 | return ret; | |
881 | } | |
882 | ||
883 | FcFontSet * | |
884 | FcCacheRead (FcConfig *config, FcGlobalCache * cache) | |
885 | { | |
886 | FcFontSet * s = FcFontSetCreate(); | |
887 | if (!s) | |
888 | return 0; | |
889 | ||
890 | if (FcCacheReadDirs (config, cache, FcConfigGetConfigDirs (config), s)) | |
891 | goto bail; | |
892 | ||
893 | return s; | |
894 | ||
895 | bail: | |
896 | FcFontSetDestroy (s); | |
897 | return 0; | |
898 | } | |
899 | ||
900 | static const char bin2hex[] = { '0', '1', '2', '3', | |
901 | '4', '5', '6', '7', | |
902 | '8', '9', 'a', 'b', | |
903 | 'c', 'd', 'e', 'f' }; | |
904 | ||
905 | static char * | |
906 | FcDirCacheHashName (char * cache_file, int collisions) | |
907 | { | |
908 | unsigned char hash[16], hex_hash[33]; | |
909 | char *cache_hashed; | |
910 | unsigned char uscore = '_'; | |
911 | int cnt, i; | |
912 | FcChar8 *tmp; | |
913 | struct MD5Context ctx; | |
914 | ||
915 | MD5Init (&ctx); | |
916 | MD5Update (&ctx, (unsigned char *)cache_file, strlen (cache_file)); | |
917 | ||
918 | for (i = 0; i < collisions; i++) | |
919 | MD5Update (&ctx, &uscore, 1); | |
920 | ||
921 | MD5Final (hash, &ctx); | |
922 | ||
923 | for (cnt = 0; cnt < 16; ++cnt) | |
924 | { | |
925 | hex_hash[2*cnt] = bin2hex[hash[cnt] >> 4]; | |
926 | hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf]; | |
927 | } | |
928 | hex_hash[32] = 0; | |
929 | ||
930 | tmp = FcStrPlus ((FcChar8 *)hex_hash, (FcChar8 *)FC_CACHE_SUFFIX); | |
931 | if (!tmp) | |
932 | return 0; | |
933 | ||
934 | cache_hashed = (char *)FcStrPlus ((FcChar8 *)PKGCACHEDIR"/", tmp); | |
935 | free (tmp); | |
936 | ||
937 | return cache_hashed; | |
938 | } | |
939 | ||
940 | /* Opens the hashed name for cache_file. | |
941 | * This would fail in the unlikely event of a collision and subsequent | |
942 | * removal of the file which originally caused the collision. */ | |
943 | static int | |
944 | FcDirCacheOpen (const FcChar8 *dir) | |
945 | { | |
946 | FcBool found; | |
947 | int fd = -1, collisions = 0; | |
948 | char *cache_file, *cache_hashed; | |
949 | char name_buf[FC_MAX_FILE_LEN]; | |
950 | struct stat dir_stat; | |
951 | ||
952 | cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); | |
953 | if (!cache_file) | |
954 | return -1; | |
955 | ||
956 | fd = open(cache_file, O_RDONLY); | |
957 | if (fd != -1) | |
958 | return fd; | |
959 | ||
960 | if (stat ((char *)dir, &dir_stat) == -1) | |
961 | return -1; | |
962 | ||
963 | found = FcFalse; | |
964 | do | |
965 | { | |
966 | struct stat c; | |
967 | FcChar8 * name_buf_dir; | |
968 | ||
969 | cache_hashed = FcDirCacheHashName (cache_file, collisions++); | |
970 | if (!cache_hashed) | |
971 | { | |
972 | FcStrFree ((FcChar8 *)cache_file); | |
973 | return -1; | |
974 | } | |
975 | ||
976 | if (fd > 0) | |
977 | close (fd); | |
978 | fd = open(cache_hashed, O_RDONLY); | |
979 | FcStrFree ((FcChar8 *)cache_hashed); | |
980 | ||
981 | if (fd == -1) | |
982 | { | |
983 | FcStrFree ((FcChar8 *)cache_file); | |
984 | return -1; | |
985 | } | |
986 | if (!FcCacheReadString (fd, name_buf, sizeof (name_buf)) || !strlen(name_buf)) | |
987 | goto bail; | |
988 | ||
989 | name_buf_dir = FcStrDirname ((FcChar8 *)name_buf); | |
990 | if (stat ((char *)name_buf_dir, &c) == -1) | |
991 | { | |
992 | FcStrFree (name_buf_dir); | |
993 | continue; | |
994 | } | |
995 | FcStrFree (name_buf_dir); | |
996 | found = (c.st_ino == dir_stat.st_ino) && (c.st_dev == dir_stat.st_dev); | |
997 | } while (!found); | |
998 | FcStrFree ((FcChar8 *)cache_file); | |
999 | return fd; | |
1000 | ||
1001 | bail: | |
1002 | FcStrFree ((FcChar8 *)cache_file); | |
1003 | close (fd); | |
1004 | return -1; | |
1005 | } | |
1006 | ||
1007 | /* read serialized state from the cache file */ | |
1008 | FcBool | |
1009 | FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir, FcConfig *config) | |
1010 | { | |
1011 | int fd; | |
1012 | char *current_arch_machine_name; | |
1013 | char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE]; | |
1014 | off_t current_arch_start = 0; | |
1015 | char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1]; | |
1016 | ||
1017 | fd = FcDirCacheOpen (dir); | |
1018 | if (fd < 0) | |
1019 | goto bail; | |
1020 | ||
1021 | current_arch_machine_name = FcCacheMachineSignature(); | |
1022 | current_arch_start = FcCacheSkipToArch(fd, | |
1023 | current_arch_machine_name); | |
1024 | if (current_arch_start < 0) | |
1025 | goto bail1; | |
1026 | ||
1027 | lseek (fd, current_arch_start, SEEK_SET); | |
1028 | if (FcCacheReadString (fd, candidate_arch_machine_name, | |
1029 | sizeof (candidate_arch_machine_name)) == 0) | |
1030 | goto bail1; | |
1031 | ||
1032 | while (FcCacheReadString (fd, subdirName, sizeof (subdirName)) && strlen (subdirName) > 0) | |
1033 | FcStrSetAdd (dirs, (FcChar8 *)subdirName); | |
1034 | ||
1035 | if (!FcDirCacheConsume (fd, (const char *)dir, set, config)) | |
1036 | goto bail1; | |
1037 | ||
1038 | close(fd); | |
1039 | return FcTrue; | |
1040 | ||
1041 | bail1: | |
1042 | close (fd); | |
1043 | bail: | |
1044 | return FcFalse; | |
1045 | } | |
1046 | ||
1047 | static FcBool | |
1048 | FcDirCacheConsume (int fd, const char * dir, FcFontSet *set, FcConfig *config) | |
1049 | { | |
1050 | FcCache metadata; | |
1051 | void * current_dir_block; | |
1052 | off_t pos; | |
1053 | ||
1054 | if (read(fd, &metadata, sizeof(FcCache)) != sizeof(FcCache)) | |
1055 | return FcFalse; | |
1056 | if (metadata.magic != FC_CACHE_MAGIC) | |
1057 | return FcFalse; | |
1058 | ||
1059 | if (!metadata.count) | |
1060 | { | |
1061 | pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)); | |
1062 | lseek (fd, pos, SEEK_SET); | |
1063 | if (config) | |
1064 | FcConfigAddFontDir (config, (FcChar8 *)dir); | |
1065 | return FcTrue; | |
1066 | } | |
1067 | ||
1068 | pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)); | |
1069 | current_dir_block = mmap (0, metadata.count, | |
1070 | PROT_READ, MAP_SHARED, fd, pos); | |
1071 | lseek (fd, pos+metadata.count, SEEK_SET); | |
1072 | if (current_dir_block == MAP_FAILED) | |
1073 | return FcFalse; | |
1074 | ||
1075 | FcCacheAddBankDir (metadata.bank, dir); | |
1076 | if (config) | |
1077 | FcConfigAddFontDir (config, (FcChar8 *)dir); | |
1078 | ||
1079 | if (!FcFontSetUnserialize (&metadata, set, current_dir_block)) | |
1080 | return FcFalse; | |
1081 | ||
1082 | return FcTrue; | |
1083 | } | |
1084 | ||
1085 | static void * | |
1086 | FcDirCacheProduce (FcFontSet *set, FcCache *metadata) | |
1087 | { | |
1088 | void * current_dir_block, * final_dir_block; | |
1089 | static unsigned int rand_state = 0; | |
1090 | int bank, needed_bytes_no_align; | |
1091 | ||
1092 | if (!rand_state) | |
1093 | rand_state = time(0L); | |
1094 | bank = rand_r(&rand_state); | |
1095 | ||
1096 | while (FcCacheHaveBank(bank)) | |
1097 | bank = rand_r(&rand_state); | |
1098 | ||
1099 | memset (metadata, 0, sizeof(FcCache)); | |
1100 | FcFontSetNewBank(); | |
1101 | needed_bytes_no_align = FcFontSetNeededBytes (set); | |
1102 | metadata->count = needed_bytes_no_align + | |
1103 | FcFontSetNeededBytesAlign (); | |
1104 | metadata->magic = FC_CACHE_MAGIC; | |
1105 | metadata->bank = bank; | |
1106 | ||
1107 | if (!needed_bytes_no_align) /* not a failure, no fonts to write */ | |
1108 | { | |
1109 | /* no, you don't really need to write any bytes at all. */ | |
1110 | metadata->count = 0; | |
1111 | return 0; | |
1112 | } | |
1113 | ||
1114 | current_dir_block = malloc (metadata->count); | |
1115 | if (!current_dir_block) | |
1116 | goto bail; | |
1117 | // shut up valgrind | |
1118 | memset (current_dir_block, 0, metadata->count); | |
1119 | final_dir_block = FcFontSetDistributeBytes (metadata, current_dir_block); | |
1120 | ||
1121 | if ((void *)((char *)current_dir_block+metadata->count) < final_dir_block) | |
1122 | goto bail; | |
1123 | ||
1124 | if (!FcFontSetSerialize (bank, set)) | |
1125 | goto bail; | |
1126 | ||
1127 | return current_dir_block; | |
1128 | ||
1129 | bail: | |
1130 | free (current_dir_block); | |
1131 | return 0; | |
1132 | } | |
1133 | ||
1134 | /* write serialized state to the cache file */ | |
1135 | FcBool | |
1136 | FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir) | |
1137 | { | |
1138 | char *cache_file; | |
1139 | char *cache_hashed; | |
1140 | int fd, fd_orig, i, dirs_count; | |
1141 | FcAtomic *atomic; | |
1142 | FcCache metadata; | |
1143 | off_t current_arch_start = 0, truncate_to; | |
1144 | char name_buf[FC_MAX_FILE_LEN]; | |
1145 | int collisions; | |
1146 | ||
1147 | char *current_arch_machine_name, * header; | |
1148 | void *current_dir_block = 0; | |
1149 | ||
1150 | dir = FcConfigNormalizeFontDir (FcConfigGetCurrent(), dir); | |
1151 | if (!dir) | |
1152 | return FcFalse; | |
1153 | ||
1154 | cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); | |
1155 | if (!cache_file) | |
1156 | goto bail; | |
1157 | ||
1158 | /* Ensure that we're not trampling a cache for some other dir. */ | |
1159 | /* This is slightly different from FcDirCacheOpen, since it | |
1160 | * needs the filename, not the file descriptor. */ | |
1161 | fd = -1; collisions = 0; | |
1162 | do | |
1163 | { | |
1164 | cache_hashed = FcDirCacheHashName (cache_file, collisions++); | |
1165 | if (!cache_hashed) | |
1166 | goto bail0; | |
1167 | ||
1168 | if (fd > 0) | |
1169 | close (fd); | |
1170 | fd = open(cache_hashed, O_RDONLY); | |
1171 | if (fd == -1) | |
1172 | break; | |
1173 | if(!FcCacheReadString (fd, name_buf, sizeof (name_buf)) || !strlen(name_buf)) | |
1174 | { | |
1175 | close (fd); | |
1176 | break; | |
1177 | } | |
1178 | close (fd); | |
1179 | ||
1180 | if (strcmp (name_buf, cache_file) != 0) | |
1181 | continue; | |
1182 | } while (0); | |
1183 | ||
1184 | current_dir_block = FcDirCacheProduce (set, &metadata); | |
1185 | ||
1186 | if (metadata.count && !current_dir_block) | |
1187 | goto bail1; | |
1188 | ||
1189 | if (FcDebug () & FC_DBG_CACHE) | |
1190 | printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file); | |
1191 | ||
1192 | atomic = FcAtomicCreate ((FcChar8 *)cache_hashed); | |
1193 | if (!atomic) | |
1194 | goto bail1; | |
1195 | ||
1196 | if (!FcAtomicLock (atomic)) | |
1197 | { | |
1198 | /* Now try rewriting the original version of the file. */ | |
1199 | FcAtomicDestroy (atomic); | |
1200 | ||
1201 | atomic = FcAtomicCreate ((FcChar8 *)cache_file); | |
1202 | fd_orig = open (cache_file, O_RDONLY); | |
1203 | if (fd_orig == -1) | |
1204 | fd_orig = open((char *)FcAtomicOrigFile (atomic), O_RDONLY); | |
1205 | ||
1206 | fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT, 0666); | |
1207 | if (fd == -1) | |
1208 | goto bail2; | |
1209 | } | |
1210 | ||
1211 | /* In all cases, try opening the real location of the cache file first. */ | |
1212 | /* (even if that's not atomic.) */ | |
1213 | fd_orig = open (cache_file, O_RDONLY); | |
1214 | if (fd_orig == -1) | |
1215 | fd_orig = open((char *)FcAtomicOrigFile (atomic), O_RDONLY); | |
1216 | ||
1217 | fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT, 0666); | |
1218 | if (fd == -1) | |
1219 | goto bail3; | |
1220 | ||
1221 | FcCacheWriteString (fd, cache_file); | |
1222 | ||
1223 | current_arch_machine_name = FcCacheMachineSignature (); | |
1224 | current_arch_start = 0; | |
1225 | ||
1226 | if (fd_orig != -1) | |
1227 | current_arch_start = | |
1228 | FcCacheSkipToArch(fd_orig, current_arch_machine_name); | |
1229 | ||
1230 | if (current_arch_start < 0) | |
1231 | { | |
1232 | off_t i = lseek(fd_orig, 0, SEEK_END); | |
1233 | if (i < strlen (FC_GLOBAL_MAGIC_COOKIE)+1) | |
1234 | i = strlen (FC_GLOBAL_MAGIC_COOKIE)+1; | |
1235 | current_arch_start = FcCacheNextOffset (i); | |
1236 | } | |
1237 | ||
1238 | if (fd_orig != -1 && !FcCacheCopyOld(fd, fd_orig, current_arch_start)) | |
1239 | goto bail4; | |
1240 | ||
1241 | if (fd_orig != -1) | |
1242 | close (fd_orig); | |
1243 | ||
1244 | current_arch_start = lseek(fd, 0, SEEK_CUR); | |
1245 | if (ftruncate (fd, current_arch_start) == -1) | |
1246 | goto bail4; | |
1247 | ||
1248 | /* allocate space for subdir names in this block */ | |
1249 | dirs_count = 0; | |
1250 | for (i = 0; i < dirs->size; i++) | |
1251 | dirs_count += strlen((char *)dirs->strs[i]) + 1; | |
1252 | dirs_count ++; | |
1253 | ||
1254 | /* now write the address of the next offset */ | |
1255 | truncate_to = FcCacheNextOffset (FcCacheNextOffset (current_arch_start + sizeof (FcCache) + dirs_count) + metadata.count) - current_arch_start; | |
1256 | header = malloc (10 + strlen (current_arch_machine_name)); | |
1257 | if (!header) | |
1258 | goto bail4; | |
1259 | sprintf (header, "%8x ", (int)truncate_to); | |
1260 | strcat (header, current_arch_machine_name); | |
1261 | if (!FcCacheWriteString (fd, header)) | |
1262 | goto bail5; | |
1263 | ||
1264 | for (i = 0; i < dirs->size; i++) | |
1265 | FcCacheWriteString (fd, (char *)dirs->strs[i]); | |
1266 | FcCacheWriteString (fd, ""); | |
1267 | ||
1268 | if (write (fd, &metadata, sizeof(FcCache)) != sizeof(FcCache)) { | |
1269 | perror("write metadata"); | |
1270 | goto bail5; | |
1271 | } | |
1272 | if (metadata.count) | |
1273 | { | |
1274 | off_t off = FcCacheNextOffset (lseek(fd, 0, SEEK_END)); | |
1275 | if (lseek (fd, off, SEEK_SET) != off) | |
1276 | perror("lseek"); | |
1277 | else if (write (fd, current_dir_block, metadata.count) != | |
1278 | metadata.count) | |
1279 | perror("write current_dir_block"); | |
1280 | free (current_dir_block); | |
1281 | } | |
1282 | ||
1283 | /* this actually serves to pad out the cache file, if needed */ | |
1284 | if (ftruncate (fd, current_arch_start + truncate_to) == -1) | |
1285 | goto bail5; | |
1286 | ||
1287 | free (header); | |
1288 | close(fd); | |
1289 | if (!FcAtomicReplaceOrig(atomic)) | |
1290 | goto bail5; | |
1291 | FcStrFree ((FcChar8 *)cache_hashed); | |
1292 | FcStrFree ((FcChar8 *)cache_file); | |
1293 | FcAtomicUnlock (atomic); | |
1294 | FcAtomicDestroy (atomic); | |
1295 | return FcTrue; | |
1296 | ||
1297 | bail5: | |
1298 | free (header); | |
1299 | bail4: | |
1300 | close (fd); | |
1301 | bail3: | |
1302 | FcAtomicUnlock (atomic); | |
1303 | bail2: | |
1304 | FcAtomicDestroy (atomic); | |
1305 | bail1: | |
1306 | FcStrFree ((FcChar8 *)cache_hashed); | |
1307 | bail0: | |
1308 | unlink ((char *)cache_file); | |
1309 | FcStrFree ((FcChar8 *)cache_file); | |
1310 | if (current_dir_block) | |
1311 | free (current_dir_block); | |
1312 | bail: | |
1313 | return FcFalse; | |
1314 | } | |
1315 | ||
1316 | static char * | |
1317 | FcCacheMachineSignature () | |
1318 | { | |
1319 | static char buf[MACHINE_SIGNATURE_SIZE]; | |
1320 | int32_t magic = ENDIAN_TEST; | |
1321 | char * m = (char *)&magic; | |
1322 | ||
1323 | sprintf (buf, "%2x%2x%2x%2x " | |
1324 | "%4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x " | |
1325 | "%4x %4x %4x %4x %4x %4x %4x %4x\n", | |
1326 | m[0], m[1], m[2], m[3], | |
1327 | (unsigned int)sizeof (char), | |
1328 | (unsigned int)sizeof (char *), | |
1329 | (unsigned int)sizeof (int), | |
1330 | (unsigned int)sizeof (FcPattern), | |
1331 | (unsigned int)sizeof (FcPatternEltPtr), | |
1332 | (unsigned int)sizeof (struct _FcPatternElt *), | |
1333 | (unsigned int)sizeof (FcPatternElt), | |
1334 | (unsigned int)sizeof (FcObjectPtr), | |
1335 | (unsigned int)sizeof (FcValueListPtr), | |
1336 | (unsigned int)sizeof (FcValue), | |
1337 | (unsigned int)sizeof (FcValueBinding), | |
1338 | (unsigned int)sizeof (struct _FcValueList *), | |
1339 | (unsigned int)sizeof (FcCharSet), | |
1340 | (unsigned int)sizeof (FcCharLeaf **), | |
1341 | (unsigned int)sizeof (FcChar16 *), | |
1342 | (unsigned int)sizeof (FcChar16), | |
1343 | (unsigned int)sizeof (FcCharLeaf), | |
1344 | (unsigned int)sizeof (FcChar32), | |
1345 | (unsigned int)sizeof (FcCache), | |
1346 | (unsigned int)sysconf(_SC_PAGESIZE)); | |
1347 | ||
1348 | return buf; | |
1349 | } | |
1350 | ||
1351 | static int banks_ptr = 0, banks_alloc = 0; | |
1352 | int * _fcBankId = 0, * _fcBankIdx = 0; | |
1353 | static const char ** bankDirs = 0; | |
1354 | ||
1355 | static FcBool | |
1356 | FcCacheHaveBank (int bank) | |
1357 | { | |
1358 | int i; | |
1359 | ||
1360 | if (bank < FC_BANK_FIRST) | |
1361 | return FcTrue; | |
1362 | ||
1363 | for (i = 0; i < banks_ptr; i++) | |
1364 | if (_fcBankId[i] == bank) | |
1365 | return FcTrue; | |
1366 | ||
1367 | return FcFalse; | |
1368 | } | |
1369 | ||
1370 | int | |
1371 | FcCacheBankToIndexMTF (int bank) | |
1372 | { | |
1373 | int i, j; | |
1374 | ||
1375 | for (i = 0; i < banks_ptr; i++) | |
1376 | if (_fcBankId[_fcBankIdx[i]] == bank) | |
1377 | { | |
1378 | int t = _fcBankIdx[i]; | |
1379 | ||
1380 | for (j = i; j > 0; j--) | |
1381 | _fcBankIdx[j] = _fcBankIdx[j-1]; | |
1382 | _fcBankIdx[0] = t; | |
1383 | return t; | |
1384 | } | |
1385 | ||
1386 | if (banks_ptr >= banks_alloc) | |
1387 | { | |
1388 | int * b, * bidx; | |
1389 | const char ** bds; | |
1390 | ||
1391 | b = realloc (_fcBankId, (banks_alloc + 4) * sizeof(int)); | |
1392 | if (!b) | |
1393 | return -1; | |
1394 | _fcBankId = b; | |
1395 | ||
1396 | bidx = realloc (_fcBankIdx, (banks_alloc + 4) * sizeof(int)); | |
1397 | if (!bidx) | |
1398 | return -1; | |
1399 | _fcBankIdx = bidx; | |
1400 | ||
1401 | bds = realloc (bankDirs, (banks_alloc + 4) * sizeof (char *)); | |
1402 | if (!bds) | |
1403 | return -1; | |
1404 | bankDirs = bds; | |
1405 | ||
1406 | banks_alloc += 4; | |
1407 | } | |
1408 | ||
1409 | i = banks_ptr++; | |
1410 | _fcBankId[i] = bank; | |
1411 | _fcBankIdx[i] = i; | |
1412 | return i; | |
1413 | } | |
1414 | ||
1415 | static void | |
1416 | FcCacheAddBankDir (int bank, const char * dir) | |
1417 | { | |
1418 | int bi = FcCacheBankToIndexMTF (bank); | |
1419 | ||
1420 | if (bi < 0) | |
1421 | return; | |
1422 | ||
1423 | bankDirs[bi] = (const char *)FcStrCopy ((FcChar8 *)dir); | |
1424 | } | |
1425 | ||
1426 | const char * | |
1427 | FcCacheFindBankDir (int bank) | |
1428 | { | |
1429 | int bi = FcCacheBankToIndex (bank); | |
1430 | return bankDirs[bi]; | |
1431 | } | |
1432 | ||
1433 | /* | |
1434 | * This code implements the MD5 message-digest algorithm. | |
1435 | * The algorithm is due to Ron Rivest. This code was | |
1436 | * written by Colin Plumb in 1993, no copyright is claimed. | |
1437 | * This code is in the public domain; do with it what you wish. | |
1438 | * | |
1439 | * Equivalent code is available from RSA Data Security, Inc. | |
1440 | * This code has been tested against that, and is equivalent, | |
1441 | * except that you don't need to include two pages of legalese | |
1442 | * with every copy. | |
1443 | * | |
1444 | * To compute the message digest of a chunk of bytes, declare an | |
1445 | * MD5Context structure, pass it to MD5Init, call MD5Update as | |
1446 | * needed on buffers full of bytes, and then call MD5Final, which | |
1447 | * will fill a supplied 16-byte array with the digest. | |
1448 | */ | |
1449 | ||
1450 | #ifndef HIGHFIRST | |
1451 | #define byteReverse(buf, len) /* Nothing */ | |
1452 | #else | |
1453 | /* | |
1454 | * Note: this code is harmless on little-endian machines. | |
1455 | */ | |
1456 | void byteReverse(unsigned char *buf, unsigned longs) | |
1457 | { | |
1458 | FcChar32 t; | |
1459 | do { | |
1460 | t = (FcChar32) ((unsigned) buf[3] << 8 | buf[2]) << 16 | | |
1461 | ((unsigned) buf[1] << 8 | buf[0]); | |
1462 | *(FcChar32 *) buf = t; | |
1463 | buf += 4; | |
1464 | } while (--longs); | |
1465 | } | |
1466 | #endif | |
1467 | ||
1468 | /* | |
1469 | * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious | |
1470 | * initialization constants. | |
1471 | */ | |
1472 | static void MD5Init(struct MD5Context *ctx) | |
1473 | { | |
1474 | ctx->buf[0] = 0x67452301; | |
1475 | ctx->buf[1] = 0xefcdab89; | |
1476 | ctx->buf[2] = 0x98badcfe; | |
1477 | ctx->buf[3] = 0x10325476; | |
1478 | ||
1479 | ctx->bits[0] = 0; | |
1480 | ctx->bits[1] = 0; | |
1481 | } | |
1482 | ||
1483 | /* | |
1484 | * Update context to reflect the concatenation of another buffer full | |
1485 | * of bytes. | |
1486 | */ | |
1487 | static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len) | |
1488 | { | |
1489 | FcChar32 t; | |
1490 | ||
1491 | /* Update bitcount */ | |
1492 | ||
1493 | t = ctx->bits[0]; | |
1494 | if ((ctx->bits[0] = t + ((FcChar32) len << 3)) < t) | |
1495 | ctx->bits[1]++; /* Carry from low to high */ | |
1496 | ctx->bits[1] += len >> 29; | |
1497 | ||
1498 | t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ | |
1499 | ||
1500 | /* Handle any leading odd-sized chunks */ | |
1501 | ||
1502 | if (t) { | |
1503 | unsigned char *p = (unsigned char *) ctx->in + t; | |
1504 | ||
1505 | t = 64 - t; | |
1506 | if (len < t) { | |
1507 | memcpy(p, buf, len); | |
1508 | return; | |
1509 | } | |
1510 | memcpy(p, buf, t); | |
1511 | byteReverse(ctx->in, 16); | |
1512 | MD5Transform(ctx->buf, (FcChar32 *) ctx->in); | |
1513 | buf += t; | |
1514 | len -= t; | |
1515 | } | |
1516 | /* Process data in 64-byte chunks */ | |
1517 | ||
1518 | while (len >= 64) { | |
1519 | memcpy(ctx->in, buf, 64); | |
1520 | byteReverse(ctx->in, 16); | |
1521 | MD5Transform(ctx->buf, (FcChar32 *) ctx->in); | |
1522 | buf += 64; | |
1523 | len -= 64; | |
1524 | } | |
1525 | ||
1526 | /* Handle any remaining bytes of data. */ | |
1527 | ||
1528 | memcpy(ctx->in, buf, len); | |
1529 | } | |
1530 | ||
1531 | /* | |
1532 | * Final wrapup - pad to 64-byte boundary with the bit pattern | |
1533 | * 1 0* (64-bit count of bits processed, MSB-first) | |
1534 | */ | |
1535 | static void MD5Final(unsigned char digest[16], struct MD5Context *ctx) | |
1536 | { | |
1537 | unsigned count; | |
1538 | unsigned char *p; | |
1539 | ||
1540 | /* Compute number of bytes mod 64 */ | |
1541 | count = (ctx->bits[0] >> 3) & 0x3F; | |
1542 | ||
1543 | /* Set the first char of padding to 0x80. This is safe since there is | |
1544 | always at least one byte free */ | |
1545 | p = ctx->in + count; | |
1546 | *p++ = 0x80; | |
1547 | ||
1548 | /* Bytes of padding needed to make 64 bytes */ | |
1549 | count = 64 - 1 - count; | |
1550 | ||
1551 | /* Pad out to 56 mod 64 */ | |
1552 | if (count < 8) { | |
1553 | /* Two lots of padding: Pad the first block to 64 bytes */ | |
1554 | memset(p, 0, count); | |
1555 | byteReverse(ctx->in, 16); | |
1556 | MD5Transform(ctx->buf, (FcChar32 *) ctx->in); | |
1557 | ||
1558 | /* Now fill the next block with 56 bytes */ | |
1559 | memset(ctx->in, 0, 56); | |
1560 | } else { | |
1561 | /* Pad block to 56 bytes */ | |
1562 | memset(p, 0, count - 8); | |
1563 | } | |
1564 | byteReverse(ctx->in, 14); | |
1565 | ||
1566 | /* Append length in bits and transform */ | |
1567 | ((FcChar32 *) ctx->in)[14] = ctx->bits[0]; | |
1568 | ((FcChar32 *) ctx->in)[15] = ctx->bits[1]; | |
1569 | ||
1570 | MD5Transform(ctx->buf, (FcChar32 *) ctx->in); | |
1571 | byteReverse((unsigned char *) ctx->buf, 4); | |
1572 | memcpy(digest, ctx->buf, 16); | |
1573 | memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */ | |
1574 | } | |
1575 | ||
1576 | ||
1577 | /* The four core functions - F1 is optimized somewhat */ | |
1578 | ||
1579 | /* #define F1(x, y, z) (x & y | ~x & z) */ | |
1580 | #define F1(x, y, z) (z ^ (x & (y ^ z))) | |
1581 | #define F2(x, y, z) F1(z, x, y) | |
1582 | #define F3(x, y, z) (x ^ y ^ z) | |
1583 | #define F4(x, y, z) (y ^ (x | ~z)) | |
1584 | ||
1585 | /* This is the central step in the MD5 algorithm. */ | |
1586 | #define MD5STEP(f, w, x, y, z, data, s) \ | |
1587 | ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) | |
1588 | ||
1589 | /* | |
1590 | * The core of the MD5 algorithm, this alters an existing MD5 hash to | |
1591 | * reflect the addition of 16 longwords of new data. MD5Update blocks | |
1592 | * the data and converts bytes into longwords for this routine. | |
1593 | */ | |
1594 | static void MD5Transform(FcChar32 buf[4], FcChar32 in[16]) | |
1595 | { | |
1596 | register FcChar32 a, b, c, d; | |
1597 | ||
1598 | a = buf[0]; | |
1599 | b = buf[1]; | |
1600 | c = buf[2]; | |
1601 | d = buf[3]; | |
1602 | ||
1603 | MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); | |
1604 | MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); | |
1605 | MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); | |
1606 | MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); | |
1607 | MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); | |
1608 | MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); | |
1609 | MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); | |
1610 | MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); | |
1611 | MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); | |
1612 | MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); | |
1613 | MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); | |
1614 | MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); | |
1615 | MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); | |
1616 | MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); | |
1617 | MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); | |
1618 | MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); | |
1619 | ||
1620 | MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); | |
1621 | MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); | |
1622 | MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); | |
1623 | MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); | |
1624 | MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); | |
1625 | MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); | |
1626 | MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); | |
1627 | MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); | |
1628 | MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); | |
1629 | MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); | |
1630 | MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); | |
1631 | MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); | |
1632 | MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); | |
1633 | MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); | |
1634 | MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); | |
1635 | MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); | |
1636 | ||
1637 | MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); | |
1638 | MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); | |
1639 | MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); | |
1640 | MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); | |
1641 | MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); | |
1642 | MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); | |
1643 | MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); | |
1644 | MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); | |
1645 | MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); | |
1646 | MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); | |
1647 | MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); | |
1648 | MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); | |
1649 | MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); | |
1650 | MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); | |
1651 | MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); | |
1652 | MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); | |
1653 | ||
1654 | MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); | |
1655 | MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); | |
1656 | MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); | |
1657 | MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); | |
1658 | MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); | |
1659 | MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); | |
1660 | MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); | |
1661 | MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); | |
1662 | MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); | |
1663 | MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); | |
1664 | MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); | |
1665 | MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); | |
1666 | MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); | |
1667 | MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); | |
1668 | MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); | |
1669 | MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); | |
1670 | ||
1671 | buf[0] += a; | |
1672 | buf[1] += b; | |
1673 | buf[2] += c; | |
1674 | buf[3] += d; | |
1675 | } |