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24330d27 | 1 | /* |
4bd4418a | 2 | * $RCSId: xc/lib/fontconfig/src/fccache.c,v 1.12 2002/08/22 07:36:44 keithp Exp $ |
24330d27 | 3 | * |
46b51147 | 4 | * Copyright © 2000 Keith Packard |
03a212e5 | 5 | * Copyright © 2005 Patrick Lam |
24330d27 KP |
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 | ||
212c9f43 | 26 | #include <fcntl.h> |
4262e0b3 | 27 | #include <dirent.h> |
212c9f43 PL |
28 | #include <sys/mman.h> |
29 | #include <sys/utsname.h> | |
fd77c154 PL |
30 | #include <sys/types.h> |
31 | #include <unistd.h> | |
24330d27 KP |
32 | #include "fcint.h" |
33 | ||
2dbe7597 PL |
34 | #define ENDIAN_TEST 0x12345678 |
35 | #define MACHINE_SIGNATURE_SIZE 9 + 5*19 + 1 | |
36 | ||
eb0cf671 PL |
37 | static off_t |
38 | FcCacheSkipToArch (int fd, const char * arch); | |
1b7be377 | 39 | |
eb0cf671 PL |
40 | static FcBool |
41 | FcCacheMoveDown (int fd, off_t start); | |
1b7be377 | 42 | |
eb0cf671 PL |
43 | static void * |
44 | FcDirCacheProduce (FcFontSet *set, FcCache * metadata); | |
1b7be377 PL |
45 | |
46 | static FcBool | |
eb0cf671 | 47 | FcDirCacheConsume (int fd, FcFontSet *set); |
1b7be377 PL |
48 | |
49 | static FcBool | |
2304e38f | 50 | FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir); |
1b7be377 | 51 | |
eb0cf671 PL |
52 | static int |
53 | FcCacheNextOffset(off_t w); | |
1b7be377 | 54 | |
eb0cf671 PL |
55 | static char * |
56 | FcCacheMachineSignature (void); | |
1b7be377 PL |
57 | |
58 | static FcBool | |
eb0cf671 | 59 | FcCacheHaveBank (int bank); |
1b7be377 | 60 | |
eb0cf671 | 61 | #define FC_DBG_CACHE_REF 1024 |
1b7be377 | 62 | |
8245771d PL |
63 | static char * |
64 | FcCacheReadString (int fd, char *dest, int len) | |
24330d27 | 65 | { |
212c9f43 | 66 | FcChar8 c; |
ccb3e93b | 67 | FcBool escape; |
ccb3e93b KP |
68 | int size; |
69 | int i; | |
24330d27 | 70 | |
24330d27 | 71 | if (len == 0) |
03a212e5 | 72 | return 0; |
24330d27 | 73 | |
ccb3e93b KP |
74 | size = len; |
75 | i = 0; | |
24330d27 | 76 | escape = FcFalse; |
212c9f43 | 77 | while (read (fd, &c, 1) == 1) |
24330d27 KP |
78 | { |
79 | if (!escape) | |
80 | { | |
81 | switch (c) { | |
82 | case '"': | |
ccb3e93b KP |
83 | c = '\0'; |
84 | break; | |
24330d27 KP |
85 | case '\\': |
86 | escape = FcTrue; | |
87 | continue; | |
88 | } | |
89 | } | |
ccb3e93b KP |
90 | if (i == size) |
91 | { | |
212c9f43 PL |
92 | dest[i++] = 0; |
93 | return dest; | |
ccb3e93b | 94 | } |
212c9f43 | 95 | dest[i++] = c; |
ccb3e93b | 96 | if (c == '\0') |
212c9f43 | 97 | return dest; |
24330d27 KP |
98 | escape = FcFalse; |
99 | } | |
ccb3e93b | 100 | return 0; |
24330d27 KP |
101 | } |
102 | ||
103 | static FcBool | |
8245771d | 104 | FcCacheWriteString (int fd, const char *chars) |
327a7fd4 | 105 | { |
212c9f43 | 106 | if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1) |
327a7fd4 | 107 | return FcFalse; |
327a7fd4 KP |
108 | return FcTrue; |
109 | } | |
110 | ||
eb0cf671 PL |
111 | static void |
112 | FcGlobalCacheDirDestroy (FcGlobalCacheDir *d) | |
1b7be377 | 113 | { |
5e678e94 PL |
114 | FcMemFree (FC_MEM_STRING, strlen (d->name)+1); |
115 | free (d->name); | |
116 | FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir)); | |
117 | free (d); | |
1b7be377 PL |
118 | } |
119 | ||
eb0cf671 PL |
120 | FcGlobalCache * |
121 | FcGlobalCacheCreate (void) | |
1b7be377 | 122 | { |
eb0cf671 | 123 | FcGlobalCache *cache; |
1b7be377 | 124 | |
eb0cf671 PL |
125 | cache = malloc (sizeof (FcGlobalCache)); |
126 | if (!cache) | |
127 | return 0; | |
128 | FcMemAlloc (FC_MEM_CACHE, sizeof (FcGlobalCache)); | |
129 | cache->dirs = 0; | |
130 | cache->updated = FcFalse; | |
131 | cache->fd = -1; | |
132 | return cache; | |
1b7be377 PL |
133 | } |
134 | ||
eb0cf671 PL |
135 | void |
136 | FcGlobalCacheDestroy (FcGlobalCache *cache) | |
327a7fd4 | 137 | { |
eb0cf671 | 138 | FcGlobalCacheDir *d, *next; |
327a7fd4 | 139 | |
eb0cf671 | 140 | for (d = cache->dirs; d; d = next) |
327a7fd4 | 141 | { |
eb0cf671 PL |
142 | next = d->next; |
143 | FcGlobalCacheDirDestroy (d); | |
327a7fd4 | 144 | } |
eb0cf671 PL |
145 | FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache)); |
146 | free (cache); | |
327a7fd4 KP |
147 | } |
148 | ||
149 | void | |
eb0cf671 | 150 | FcGlobalCacheLoad (FcGlobalCache *cache, |
03a212e5 | 151 | FcStrSet *staleDirs, |
eb0cf671 | 152 | const FcChar8 *cache_file) |
327a7fd4 | 153 | { |
8245771d | 154 | char name_buf[8192]; |
eb0cf671 PL |
155 | FcGlobalCacheDir *d, *next; |
156 | char * current_arch_machine_name; | |
157 | char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9]; | |
158 | off_t current_arch_start; | |
327a7fd4 | 159 | |
03a212e5 PL |
160 | struct stat cache_stat, dir_stat; |
161 | ||
162 | if (stat ((char *) cache_file, &cache_stat) < 0) | |
163 | return; | |
164 | ||
eb0cf671 PL |
165 | cache->fd = open ((char *) cache_file, O_RDONLY); |
166 | if (cache->fd == -1) | |
167 | return; | |
327a7fd4 | 168 | |
eb0cf671 | 169 | cache->updated = FcFalse; |
327a7fd4 | 170 | |
eb0cf671 PL |
171 | current_arch_machine_name = FcCacheMachineSignature (); |
172 | current_arch_start = FcCacheSkipToArch(cache->fd, | |
173 | current_arch_machine_name); | |
174 | if (current_arch_start < 0) | |
175 | goto bail0; | |
327a7fd4 | 176 | |
eb0cf671 | 177 | lseek (cache->fd, current_arch_start, SEEK_SET); |
03a212e5 PL |
178 | FcCacheReadString (cache->fd, candidate_arch_machine_name, |
179 | sizeof (candidate_arch_machine_name)); | |
180 | if (strlen(candidate_arch_machine_name) == 0) | |
eb0cf671 | 181 | goto bail0; |
1b7be377 | 182 | |
eb0cf671 | 183 | while (1) |
1b7be377 | 184 | { |
8cb4c56d PL |
185 | off_t targ; |
186 | ||
eb0cf671 PL |
187 | FcCacheReadString (cache->fd, name_buf, sizeof (name_buf)); |
188 | if (!strlen(name_buf)) | |
1b7be377 | 189 | break; |
1b7be377 | 190 | |
03a212e5 PL |
191 | if (stat ((char *) name_buf, &dir_stat) < 0 || |
192 | dir_stat.st_mtime > cache_stat.st_mtime) | |
193 | { | |
194 | FcCache md; | |
195 | ||
8245771d | 196 | FcStrSetAdd (staleDirs, FcStrCopy ((FcChar8 *)name_buf)); |
03a212e5 PL |
197 | read (cache->fd, &md, sizeof (FcCache)); |
198 | lseek (cache->fd, FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + md.count, SEEK_SET); | |
199 | continue; | |
200 | } | |
201 | ||
eb0cf671 PL |
202 | d = malloc (sizeof (FcGlobalCacheDir)); |
203 | if (!d) | |
204 | goto bail1; | |
1b7be377 | 205 | |
eb0cf671 PL |
206 | d->next = cache->dirs; |
207 | cache->dirs = d; | |
1b7be377 | 208 | |
8245771d | 209 | d->name = (char *)FcStrCopy ((FcChar8 *)name_buf); |
eb0cf671 PL |
210 | d->ent = 0; |
211 | d->offset = lseek (cache->fd, 0, SEEK_CUR); | |
8cb4c56d PL |
212 | if (read (cache->fd, &d->metadata, sizeof (FcCache)) != sizeof (FcCache)) |
213 | goto bail1; | |
214 | targ = FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + d->metadata.count; | |
215 | if (lseek (cache->fd, targ, SEEK_SET) != targ) | |
216 | goto bail1; | |
1b7be377 | 217 | } |
eb0cf671 | 218 | return; |
1b7be377 | 219 | |
eb0cf671 PL |
220 | bail1: |
221 | for (d = cache->dirs; d; d = next) | |
1b7be377 | 222 | { |
eb0cf671 PL |
223 | next = d->next; |
224 | free (d); | |
1b7be377 | 225 | } |
eb0cf671 PL |
226 | cache->dirs = 0; |
227 | bail0: | |
eb0cf671 PL |
228 | close (cache->fd); |
229 | cache->fd = -1; | |
230 | return; | |
1b7be377 PL |
231 | } |
232 | ||
1b7be377 | 233 | FcBool |
8245771d | 234 | FcGlobalCacheReadDir (FcFontSet *set, FcStrSet *dirs, FcGlobalCache * cache, const char *dir, FcConfig *config) |
1b7be377 | 235 | { |
eb0cf671 | 236 | FcGlobalCacheDir *d; |
03a212e5 | 237 | FcBool ret = FcFalse; |
1b7be377 | 238 | |
eb0cf671 | 239 | if (cache->fd == -1) |
1b7be377 | 240 | return FcFalse; |
1b7be377 | 241 | |
eb0cf671 | 242 | for (d = cache->dirs; d; d = d->next) |
1b7be377 | 243 | { |
03a212e5 | 244 | if (strncmp (d->name, dir, strlen(dir)) == 0) |
1b7be377 | 245 | { |
eb0cf671 PL |
246 | lseek (cache->fd, d->offset, SEEK_SET); |
247 | if (!FcDirCacheConsume (cache->fd, set)) | |
248 | return FcFalse; | |
03a212e5 PL |
249 | if (strcmp (d->name, dir) == 0) |
250 | ret = FcTrue; | |
1b7be377 | 251 | } |
1b7be377 | 252 | } |
1b7be377 | 253 | |
03a212e5 | 254 | return ret; |
1b7be377 PL |
255 | } |
256 | ||
eb0cf671 PL |
257 | FcBool |
258 | FcGlobalCacheUpdate (FcGlobalCache *cache, | |
8245771d | 259 | const char *name, |
eb0cf671 | 260 | FcFontSet *set) |
1b7be377 | 261 | { |
eb0cf671 | 262 | FcGlobalCacheDir * d; |
1b7be377 | 263 | |
eb0cf671 PL |
264 | if (!set->nfont) |
265 | return FcTrue; | |
1b7be377 | 266 | |
eb0cf671 | 267 | for (d = cache->dirs; d; d = d->next) |
1b7be377 | 268 | { |
eb0cf671 | 269 | if (strcmp(d->name, name) == 0) |
1b7be377 | 270 | break; |
24330d27 | 271 | } |
24330d27 | 272 | |
eb0cf671 | 273 | if (!d) |
24330d27 | 274 | { |
eb0cf671 PL |
275 | d = malloc (sizeof (FcGlobalCacheDir)); |
276 | if (!d) | |
277 | return FcFalse; | |
278 | d->next = cache->dirs; | |
279 | cache->dirs = d; | |
24330d27 | 280 | } |
24330d27 | 281 | |
eb0cf671 | 282 | cache->updated = FcTrue; |
24330d27 | 283 | |
8245771d | 284 | d->name = (char *)FcStrCopy ((FcChar8 *)name); |
eb0cf671 PL |
285 | d->ent = FcDirCacheProduce (set, &d->metadata); |
286 | d->offset = 0; | |
287 | return FcTrue; | |
24330d27 KP |
288 | } |
289 | ||
290 | FcBool | |
327a7fd4 KP |
291 | FcGlobalCacheSave (FcGlobalCache *cache, |
292 | const FcChar8 *cache_file) | |
24330d27 | 293 | { |
eb0cf671 | 294 | int fd; |
327a7fd4 | 295 | FcGlobalCacheDir *dir; |
327a7fd4 | 296 | FcAtomic *atomic; |
eb0cf671 PL |
297 | off_t current_arch_start = 0, truncate_to; |
298 | char * current_arch_machine_name, * header; | |
24330d27 | 299 | |
eb0cf671 | 300 | if (!cache->updated) |
24330d27 KP |
301 | return FcTrue; |
302 | ||
daeed6e0 | 303 | #if defined (HAVE_GETUID) && defined (HAVE_GETEUID) |
a391da8f KP |
304 | /* Set-UID programs can't safely update the cache */ |
305 | if (getuid () != geteuid ()) | |
306 | return FcFalse; | |
daeed6e0 | 307 | #endif |
a391da8f | 308 | |
134f6011 KP |
309 | atomic = FcAtomicCreate (cache_file); |
310 | if (!atomic) | |
24330d27 | 311 | goto bail0; |
134f6011 | 312 | if (!FcAtomicLock (atomic)) |
24330d27 | 313 | goto bail1; |
eb0cf671 PL |
314 | fd = open ((char *) FcAtomicNewFile(atomic), O_RDWR | O_CREAT, |
315 | S_IRUSR | S_IWUSR); | |
316 | if (fd == -1) | |
24330d27 KP |
317 | goto bail2; |
318 | ||
eb0cf671 PL |
319 | current_arch_machine_name = FcCacheMachineSignature (); |
320 | current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name); | |
321 | if (current_arch_start < 0) | |
322 | current_arch_start = FcCacheNextOffset (lseek(fd, 0, SEEK_END)); | |
323 | ||
324 | if (!FcCacheMoveDown(fd, current_arch_start)) | |
325 | goto bail2; | |
326 | ||
327 | current_arch_start = lseek(fd, 0, SEEK_CUR); | |
328 | if (ftruncate (fd, current_arch_start) == -1) | |
329 | goto bail2; | |
330 | ||
03a212e5 PL |
331 | header = malloc (10 + strlen (current_arch_machine_name)); |
332 | if (!header) | |
333 | goto bail1; | |
03a212e5 | 334 | |
8cb4c56d | 335 | truncate_to = current_arch_start + strlen(current_arch_machine_name) + 11; |
eb0cf671 | 336 | for (dir = cache->dirs; dir; dir = dir->next) |
24330d27 | 337 | { |
eb0cf671 PL |
338 | truncate_to += strlen(dir->name) + 1; |
339 | truncate_to += sizeof (FcCache); | |
340 | truncate_to = FcCacheNextOffset (current_arch_start + truncate_to); | |
341 | truncate_to += dir->metadata.count; | |
342 | } | |
343 | truncate_to -= current_arch_start; | |
eb0cf671 | 344 | |
8cb4c56d PL |
345 | sprintf (header, "%8x ", (int)truncate_to); |
346 | strcat (header, current_arch_machine_name); | |
347 | if (!FcCacheWriteString (fd, header)) | |
348 | goto bail1; | |
349 | ||
eb0cf671 PL |
350 | for (dir = cache->dirs; dir; dir = dir->next) |
351 | { | |
5e678e94 PL |
352 | if (dir->ent) |
353 | { | |
354 | FcCacheWriteString (fd, dir->name); | |
355 | write (fd, &dir->metadata, sizeof(FcCache)); | |
f6ee3db5 | 356 | lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)), SEEK_SET); |
5e678e94 PL |
357 | write (fd, dir->ent, dir->metadata.count); |
358 | free (dir->ent); | |
359 | } | |
24330d27 | 360 | } |
eb0cf671 | 361 | FcCacheWriteString (fd, ""); |
24330d27 | 362 | |
eb0cf671 | 363 | if (close (fd) == -1) |
24330d27 KP |
364 | goto bail3; |
365 | ||
134f6011 | 366 | if (!FcAtomicReplaceOrig (atomic)) |
24330d27 KP |
367 | goto bail3; |
368 | ||
134f6011 KP |
369 | FcAtomicUnlock (atomic); |
370 | FcAtomicDestroy (atomic); | |
371 | ||
24330d27 KP |
372 | cache->updated = FcFalse; |
373 | return FcTrue; | |
374 | ||
24330d27 | 375 | bail3: |
134f6011 | 376 | FcAtomicDeleteNew (atomic); |
24330d27 | 377 | bail2: |
134f6011 | 378 | FcAtomicUnlock (atomic); |
24330d27 | 379 | bail1: |
134f6011 | 380 | FcAtomicDestroy (atomic); |
24330d27 KP |
381 | bail0: |
382 | return FcFalse; | |
383 | } | |
384 | ||
eb0cf671 | 385 | #define PAGESIZE 8192 |
212c9f43 | 386 | /* |
eb0cf671 PL |
387 | * Find the next presumably-mmapable offset after the supplied file |
388 | * position. | |
212c9f43 | 389 | */ |
4262e0b3 PL |
390 | static int |
391 | FcCacheNextOffset(off_t w) | |
179c3995 | 392 | { |
212c9f43 PL |
393 | if (w % PAGESIZE == 0) |
394 | return w; | |
395 | else | |
396 | return ((w / PAGESIZE)+1)*PAGESIZE; | |
179c3995 KP |
397 | } |
398 | ||
212c9f43 PL |
399 | /* return the address of the segment for the provided arch, |
400 | * or -1 if arch not found */ | |
401 | static off_t | |
402 | FcCacheSkipToArch (int fd, const char * arch) | |
403 | { | |
2dbe7597 PL |
404 | char candidate_arch_machine_name_count[MACHINE_SIGNATURE_SIZE + 9]; |
405 | char * candidate_arch; | |
212c9f43 PL |
406 | off_t current_arch_start = 0; |
407 | ||
408 | /* skip arches that are not the current arch */ | |
409 | while (1) | |
410 | { | |
411 | long bs; | |
412 | ||
8cb4c56d PL |
413 | if (lseek (fd, current_arch_start, SEEK_SET) != current_arch_start) |
414 | return -1; | |
415 | ||
eb0cf671 | 416 | if (FcCacheReadString (fd, candidate_arch_machine_name_count, |
2dbe7597 | 417 | sizeof (candidate_arch_machine_name_count)) == 0) |
5e678e94 | 418 | return -1; |
2dbe7597 PL |
419 | if (!strlen(candidate_arch_machine_name_count)) |
420 | return -1; | |
421 | bs = strtol(candidate_arch_machine_name_count, &candidate_arch, 16); | |
8cb4c56d | 422 | |
13cdf607 | 423 | // count = 0 should probably be distinguished from the !bs condition |
8cb4c56d PL |
424 | if (!bs || bs < strlen (candidate_arch_machine_name_count)) |
425 | return -1; | |
426 | ||
2dbe7597 | 427 | candidate_arch++; /* skip leading space */ |
212c9f43 | 428 | |
2dbe7597 | 429 | if (strcmp (candidate_arch, arch)==0) |
5e678e94 | 430 | return current_arch_start; |
212c9f43 PL |
431 | current_arch_start += bs; |
432 | } | |
433 | ||
5e678e94 | 434 | return -1; |
212c9f43 PL |
435 | } |
436 | ||
437 | /* Cuts out the segment at the file pointer (moves everything else | |
438 | * down to cover it), and leaves the file pointer at the end of the | |
439 | * file. */ | |
212c9f43 PL |
440 | static FcBool |
441 | FcCacheMoveDown (int fd, off_t start) | |
442 | { | |
eb0cf671 | 443 | char * buf = malloc (8192); |
2dbe7597 | 444 | char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9]; |
4262e0b3 | 445 | long bs; |
212c9f43 PL |
446 | int c, bytes_skipped; |
447 | ||
448 | if (!buf) | |
449 | return FcFalse; | |
450 | ||
451 | lseek (fd, start, SEEK_SET); | |
eb0cf671 | 452 | if (FcCacheReadString (fd, candidate_arch_machine_name, |
212c9f43 PL |
453 | sizeof (candidate_arch_machine_name)) == 0) |
454 | goto done; | |
2dbe7597 | 455 | if (!strlen(candidate_arch_machine_name)) |
212c9f43 PL |
456 | goto done; |
457 | ||
2dbe7597 | 458 | bs = strtol(candidate_arch_machine_name, 0, 16); |
212c9f43 PL |
459 | if (bs == 0) |
460 | goto done; | |
461 | ||
462 | bytes_skipped = 0; | |
463 | do | |
464 | { | |
465 | lseek (fd, start+bs+bytes_skipped, SEEK_SET); | |
eb0cf671 | 466 | if ((c = read (fd, buf, 8192)) <= 0) |
212c9f43 PL |
467 | break; |
468 | lseek (fd, start+bytes_skipped, SEEK_SET); | |
469 | if (write (fd, buf, c) < 0) | |
470 | goto bail; | |
471 | bytes_skipped += c; | |
472 | } | |
473 | while (c > 0); | |
474 | lseek (fd, start+bytes_skipped, SEEK_SET); | |
475 | ||
476 | done: | |
477 | free (buf); | |
478 | return FcTrue; | |
479 | ||
480 | bail: | |
481 | free (buf); | |
482 | return FcFalse; | |
483 | } | |
484 | ||
1b7be377 PL |
485 | FcBool |
486 | FcDirCacheValid (const FcChar8 *dir) | |
487 | { | |
488 | FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); | |
489 | struct stat file_stat, dir_stat; | |
490 | ||
491 | if (stat ((char *) dir, &dir_stat) < 0) | |
492 | { | |
493 | FcStrFree (cache_file); | |
494 | return FcFalse; | |
495 | } | |
496 | if (stat ((char *) cache_file, &file_stat) < 0) | |
497 | { | |
498 | FcStrFree (cache_file); | |
499 | return FcFalse; | |
500 | } | |
501 | FcStrFree (cache_file); | |
502 | /* | |
503 | * If the directory has been modified more recently than | |
504 | * the cache file, the cache is not valid | |
505 | */ | |
506 | if (dir_stat.st_mtime - file_stat.st_mtime > 0) | |
507 | return FcFalse; | |
508 | return FcTrue; | |
509 | } | |
510 | ||
4262e0b3 | 511 | static int |
1b7be377 PL |
512 | FcCacheReadDirs (FcConfig * config, FcGlobalCache * cache, |
513 | FcStrList *list, FcFontSet * set) | |
4262e0b3 | 514 | { |
4262e0b3 PL |
515 | int ret = 0; |
516 | FcChar8 *dir; | |
517 | FcChar8 *file, *base; | |
518 | FcStrSet *subdirs; | |
519 | FcStrList *sublist; | |
520 | struct stat statb; | |
521 | ||
522 | /* | |
03a212e5 | 523 | * Read in the results from 'list'. |
4262e0b3 PL |
524 | */ |
525 | while ((dir = FcStrListNext (list))) | |
526 | { | |
527 | /* freed below */ | |
528 | file = (FcChar8 *) malloc (strlen ((char *) dir) + 1 + FC_MAX_FILE_LEN + 1); | |
529 | if (!file) | |
530 | return FcFalse; | |
531 | ||
532 | strcpy ((char *) file, (char *) dir); | |
533 | strcat ((char *) file, "/"); | |
534 | base = file + strlen ((char *) file); | |
535 | ||
536 | subdirs = FcStrSetCreate (); | |
537 | if (!subdirs) | |
538 | { | |
539 | fprintf (stderr, "Can't create directory set\n"); | |
540 | ret++; | |
541 | free (file); | |
542 | continue; | |
543 | } | |
544 | ||
545 | if (access ((char *) dir, X_OK) < 0) | |
546 | { | |
547 | switch (errno) { | |
548 | case ENOENT: | |
549 | case ENOTDIR: | |
550 | case EACCES: | |
551 | break; | |
552 | default: | |
553 | fprintf (stderr, "\"%s\": ", dir); | |
554 | perror (""); | |
555 | ret++; | |
556 | } | |
557 | FcStrSetDestroy (subdirs); | |
558 | free (file); | |
559 | continue; | |
560 | } | |
561 | if (stat ((char *) dir, &statb) == -1) | |
562 | { | |
563 | fprintf (stderr, "\"%s\": ", dir); | |
564 | perror (""); | |
565 | FcStrSetDestroy (subdirs); | |
566 | ret++; | |
567 | free (file); | |
568 | continue; | |
569 | } | |
570 | if (!S_ISDIR (statb.st_mode)) | |
571 | { | |
572 | fprintf (stderr, "\"%s\": not a directory, skipping\n", dir); | |
573 | FcStrSetDestroy (subdirs); | |
574 | free (file); | |
575 | continue; | |
576 | } | |
2304e38f | 577 | if (!FcDirCacheValid (dir) || !FcDirCacheRead (set, subdirs, dir)) |
4262e0b3 | 578 | { |
1b7be377 | 579 | if (FcDebug () & FC_DBG_FONTSET) |
03a212e5 | 580 | printf ("cache scan dir %s\n", dir); |
2304e38f | 581 | |
1b7be377 PL |
582 | FcDirScanConfig (set, subdirs, cache, |
583 | config->blanks, dir, FcFalse, config); | |
4262e0b3 PL |
584 | } |
585 | sublist = FcStrListCreate (subdirs); | |
586 | FcStrSetDestroy (subdirs); | |
587 | if (!sublist) | |
588 | { | |
589 | fprintf (stderr, "Can't create subdir list in \"%s\"\n", dir); | |
590 | ret++; | |
591 | free (file); | |
592 | continue; | |
593 | } | |
1b7be377 | 594 | ret += FcCacheReadDirs (config, cache, sublist, set); |
4262e0b3 PL |
595 | free (file); |
596 | } | |
597 | FcStrListDone (list); | |
598 | return ret; | |
599 | } | |
600 | ||
601 | FcFontSet * | |
1b7be377 | 602 | FcCacheRead (FcConfig *config, FcGlobalCache * cache) |
4262e0b3 PL |
603 | { |
604 | FcFontSet * s = FcFontSetCreate(); | |
605 | if (!s) | |
606 | return 0; | |
607 | ||
1b7be377 | 608 | if (FcCacheReadDirs (config, cache, FcConfigGetConfigDirs (config), s)) |
4262e0b3 PL |
609 | goto bail; |
610 | ||
611 | return s; | |
612 | ||
613 | bail: | |
614 | FcFontSetDestroy (s); | |
615 | return 0; | |
616 | } | |
617 | ||
212c9f43 | 618 | /* read serialized state from the cache file */ |
eb0cf671 | 619 | static FcBool |
2304e38f | 620 | FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir) |
212c9f43 | 621 | { |
8245771d | 622 | char *cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); |
4262e0b3 | 623 | int fd; |
212c9f43 | 624 | char * current_arch_machine_name; |
2dbe7597 | 625 | char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE]; |
212c9f43 | 626 | off_t current_arch_start = 0; |
8245771d | 627 | char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1]; |
212c9f43 | 628 | |
4262e0b3 PL |
629 | if (!cache_file) |
630 | goto bail; | |
212c9f43 | 631 | |
eb0cf671 | 632 | current_arch_machine_name = FcCacheMachineSignature(); |
4262e0b3 | 633 | fd = open(cache_file, O_RDONLY); |
212c9f43 | 634 | if (fd == -1) |
2dbe7597 | 635 | goto bail; |
212c9f43 | 636 | |
212c9f43 PL |
637 | current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name); |
638 | if (current_arch_start < 0) | |
4262e0b3 | 639 | goto bail1; |
212c9f43 PL |
640 | |
641 | lseek (fd, current_arch_start, SEEK_SET); | |
eb0cf671 | 642 | if (FcCacheReadString (fd, candidate_arch_machine_name, |
212c9f43 | 643 | sizeof (candidate_arch_machine_name)) == 0) |
4262e0b3 | 644 | goto bail1; |
2304e38f PL |
645 | |
646 | while (strlen(FcCacheReadString (fd, subdirName, sizeof (subdirName))) > 0) | |
8245771d | 647 | FcStrSetAdd (dirs, (FcChar8 *)subdirName); |
2304e38f | 648 | |
eb0cf671 PL |
649 | if (!FcDirCacheConsume (fd, set)) |
650 | goto bail1; | |
651 | ||
652 | close(fd); | |
653 | free (cache_file); | |
654 | return FcTrue; | |
655 | ||
656 | bail1: | |
2304e38f | 657 | close (fd); |
eb0cf671 PL |
658 | bail: |
659 | free (cache_file); | |
660 | return FcFalse; | |
661 | } | |
662 | ||
663 | static FcBool | |
664 | FcDirCacheConsume (int fd, FcFontSet *set) | |
665 | { | |
666 | FcCache metadata; | |
667 | void * current_dir_block; | |
fd77c154 | 668 | off_t pos; |
212c9f43 | 669 | |
212c9f43 PL |
670 | read(fd, &metadata, sizeof(FcCache)); |
671 | if (metadata.magic != FC_CACHE_MAGIC) | |
eb0cf671 | 672 | return FcFalse; |
212c9f43 | 673 | |
2dbe7597 | 674 | if (!metadata.count) |
eb0cf671 | 675 | return FcTrue; |
2dbe7597 | 676 | |
fd77c154 | 677 | pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)); |
2dbe7597 PL |
678 | current_dir_block = mmap (0, metadata.count, |
679 | PROT_READ, MAP_SHARED, fd, pos); | |
680 | if (current_dir_block == MAP_FAILED) | |
eb0cf671 | 681 | return FcFalse; |
2dbe7597 PL |
682 | |
683 | if (!FcFontSetUnserialize (metadata, set, current_dir_block)) | |
eb0cf671 PL |
684 | return FcFalse; |
685 | ||
212c9f43 | 686 | return FcTrue; |
eb0cf671 PL |
687 | } |
688 | ||
689 | static void * | |
690 | FcDirCacheProduce (FcFontSet *set, FcCache *metadata) | |
691 | { | |
692 | void * current_dir_block, * final_dir_block; | |
8245771d | 693 | static unsigned int rand_state = 0; |
eb0cf671 PL |
694 | int bank; |
695 | ||
696 | if (!rand_state) | |
697 | rand_state = time(0L); | |
698 | bank = rand_r(&rand_state); | |
699 | ||
700 | while (FcCacheHaveBank(bank)) | |
701 | bank = rand_r(&rand_state); | |
702 | ||
703 | memset (metadata, 0, sizeof(FcCache)); | |
704 | FcFontSetNewBank(); | |
705 | metadata->count = FcFontSetNeededBytes (set); | |
706 | metadata->magic = FC_CACHE_MAGIC; | |
707 | metadata->bank = bank; | |
708 | ||
709 | if (!metadata->count) /* not a failure, no fonts to write */ | |
710 | return 0; | |
711 | ||
712 | current_dir_block = malloc (metadata->count); | |
713 | if (!current_dir_block) | |
714 | goto bail; | |
715 | final_dir_block = FcFontSetDistributeBytes (metadata, current_dir_block); | |
716 | ||
717 | if ((char *)current_dir_block + metadata->count != final_dir_block) | |
718 | goto bail; | |
719 | ||
720 | if (!FcFontSetSerialize (bank, set)) | |
721 | goto bail; | |
722 | ||
723 | return current_dir_block; | |
212c9f43 | 724 | |
4262e0b3 | 725 | bail: |
eb0cf671 PL |
726 | free (current_dir_block); |
727 | return 0; | |
212c9f43 PL |
728 | } |
729 | ||
730 | /* write serialized state to the cache file */ | |
731 | FcBool | |
2304e38f | 732 | FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir) |
212c9f43 | 733 | { |
4262e0b3 | 734 | FcChar8 *cache_file = FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); |
6aee8c6f | 735 | int fd, i, dirs_count; |
212c9f43 PL |
736 | FcCache metadata; |
737 | off_t current_arch_start = 0, truncate_to; | |
8245771d | 738 | |
2dbe7597 | 739 | char * current_arch_machine_name, * header; |
eb0cf671 | 740 | void * current_dir_block; |
212c9f43 | 741 | |
4262e0b3 PL |
742 | if (!cache_file) |
743 | goto bail; | |
744 | ||
eb0cf671 | 745 | current_dir_block = FcDirCacheProduce (set, &metadata); |
212c9f43 | 746 | |
a9698bed | 747 | if (metadata.count && !current_dir_block) |
4262e0b3 | 748 | goto bail; |
212c9f43 | 749 | |
4262e0b3 PL |
750 | if (FcDebug () & FC_DBG_CACHE) |
751 | printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file); | |
752 | ||
8245771d | 753 | fd = open((char *)cache_file, O_RDWR | O_CREAT, 0666); |
212c9f43 | 754 | if (fd == -1) |
eb0cf671 | 755 | goto bail0; |
212c9f43 | 756 | |
eb0cf671 | 757 | current_arch_machine_name = FcCacheMachineSignature (); |
212c9f43 PL |
758 | current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name); |
759 | if (current_arch_start < 0) | |
4262e0b3 | 760 | current_arch_start = FcCacheNextOffset (lseek(fd, 0, SEEK_END)); |
212c9f43 PL |
761 | |
762 | if (!FcCacheMoveDown(fd, current_arch_start)) | |
8cb4c56d | 763 | goto bail0; |
212c9f43 PL |
764 | |
765 | current_arch_start = lseek(fd, 0, SEEK_CUR); | |
766 | if (ftruncate (fd, current_arch_start) == -1) | |
8cb4c56d | 767 | goto bail0; |
212c9f43 | 768 | |
6aee8c6f PL |
769 | /* allocate space for subdir names in this block */ |
770 | dirs_count = 0; | |
771 | for (i = 0; i < dirs->size; i++) | |
772 | dirs_count += strlen((char *)dirs->strs[i]) + 1; | |
773 | dirs_count ++; | |
774 | ||
212c9f43 | 775 | /* now write the address of the next offset */ |
6aee8c6f | 776 | truncate_to = FcCacheNextOffset (FcCacheNextOffset (current_arch_start + sizeof (FcCache) + dirs_count) + metadata.count) - current_arch_start; |
2dbe7597 | 777 | header = malloc (10 + strlen (current_arch_machine_name)); |
eb0cf671 | 778 | if (!header) |
8cb4c56d | 779 | goto bail0; |
2dbe7597 PL |
780 | sprintf (header, "%8x ", (int)truncate_to); |
781 | strcat (header, current_arch_machine_name); | |
eb0cf671 | 782 | if (!FcCacheWriteString (fd, header)) |
4262e0b3 | 783 | goto bail1; |
212c9f43 | 784 | |
2304e38f | 785 | for (i = 0; i < dirs->size; i++) |
8245771d | 786 | FcCacheWriteString (fd, (char *)dirs->strs[i]); |
2304e38f PL |
787 | FcCacheWriteString (fd, ""); |
788 | ||
4262e0b3 | 789 | write (fd, &metadata, sizeof(FcCache)); |
a9698bed PL |
790 | if (metadata.count) |
791 | { | |
792 | lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_END)), SEEK_SET); | |
793 | write (fd, current_dir_block, metadata.count); | |
794 | free (current_dir_block); | |
795 | } | |
4262e0b3 | 796 | |
2dbe7597 | 797 | /* this actually serves to pad out the cache file, if needed */ |
212c9f43 | 798 | if (ftruncate (fd, current_arch_start + truncate_to) == -1) |
4262e0b3 | 799 | goto bail1; |
212c9f43 PL |
800 | |
801 | close(fd); | |
802 | return FcTrue; | |
803 | ||
4262e0b3 | 804 | bail1: |
0230c9f8 | 805 | free (header); |
eb0cf671 PL |
806 | bail0: |
807 | free (current_dir_block); | |
4262e0b3 | 808 | bail: |
8245771d | 809 | unlink ((char *)cache_file); |
4262e0b3 | 810 | free (cache_file); |
212c9f43 PL |
811 | return FcFalse; |
812 | } | |
813 | ||
2dbe7597 | 814 | static char * |
eb0cf671 | 815 | FcCacheMachineSignature () |
2dbe7597 PL |
816 | { |
817 | static char buf[MACHINE_SIGNATURE_SIZE]; | |
818 | int magic = ENDIAN_TEST; | |
819 | char * m = (char *)&magic; | |
820 | ||
821 | sprintf (buf, "%2x%2x%2x%2x " | |
822 | "%4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x " | |
823 | "%4x %4x %4x %4x %4x %4x %4x\n", | |
824 | m[0], m[1], m[2], m[3], | |
825 | sizeof (char), | |
826 | sizeof (char *), | |
827 | sizeof (int), | |
828 | sizeof (FcPattern), | |
829 | sizeof (FcPatternEltPtr), | |
830 | sizeof (struct _FcPatternElt *), | |
831 | sizeof (FcPatternElt), | |
832 | sizeof (FcObjectPtr), | |
833 | sizeof (FcValueListPtr), | |
834 | sizeof (FcValue), | |
835 | sizeof (FcValueBinding), | |
836 | sizeof (struct _FcValueList *), | |
837 | sizeof (FcCharSet), | |
838 | sizeof (FcCharLeaf **), | |
839 | sizeof (FcChar16 *), | |
840 | sizeof (FcChar16), | |
841 | sizeof (FcCharLeaf), | |
842 | sizeof (FcChar32), | |
843 | sizeof (FcCache)); | |
844 | ||
845 | return buf; | |
846 | } | |
847 | ||
4262e0b3 PL |
848 | static int banks_ptr = 0, banks_alloc = 0; |
849 | static int * bankId = 0; | |
850 | ||
eb0cf671 | 851 | static FcBool |
4262e0b3 PL |
852 | FcCacheHaveBank (int bank) |
853 | { | |
854 | int i; | |
855 | ||
856 | if (bank < FC_BANK_FIRST) | |
857 | return FcTrue; | |
858 | ||
859 | for (i = 0; i < banks_ptr; i++) | |
860 | if (bankId[i] == bank) | |
861 | return FcTrue; | |
862 | ||
863 | return FcFalse; | |
864 | } | |
865 | ||
866 | int | |
867 | FcCacheBankToIndex (int bank) | |
868 | { | |
869 | static int lastBank = FC_BANK_DYNAMIC, lastIndex = -1; | |
870 | int i; | |
871 | int * b; | |
872 | ||
873 | if (bank == lastBank) | |
874 | return lastIndex; | |
875 | ||
876 | for (i = 0; i < banks_ptr; i++) | |
877 | if (bankId[i] == bank) | |
878 | return i; | |
879 | ||
2dbe7597 | 880 | if (banks_ptr >= banks_alloc) |
4262e0b3 | 881 | { |
2dbe7597 | 882 | b = realloc (bankId, (banks_alloc + 4) * sizeof(int)); |
4262e0b3 PL |
883 | if (!b) |
884 | return -1; | |
885 | ||
886 | bankId = b; | |
887 | banks_alloc += 4; | |
888 | } | |
889 | ||
890 | i = banks_ptr++; | |
891 | bankId[i] = bank; | |
892 | return i; | |
893 | } |