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