1 /* 2 * Copyright 2000 Keith Packard 3 * Copyright 2005 Patrick Lam 4 * 5 * Permission to use, copy, modify, distribute, and sell this software and its 6 * documentation for any purpose is hereby granted without fee, provided that 7 * the above copyright notice appear in all copies and that both that 8 * copyright notice and this permission notice appear in supporting 9 * documentation, and that the name of the author(s) not be used in 10 * advertising or publicity pertaining to distribution of the software without 11 * specific, written prior permission. The authors make no 12 * representations about the suitability of this software for any purpose. It 13 * is provided "as is" without express or implied warranty. 14 * 15 * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 17 * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR 18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 19 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 20 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 21 * PERFORMANCE OF THIS SOFTWARE. 22 */ 23 #include "fcint.h" 24 #include "fcarch.h" 25 #include "fcmd5.h" 26 #include <stdio.h> 27 #include <stdlib.h> 28 #include <fcntl.h> 29 #ifdef HAVE_DIRENT_H 30 #include <dirent.h> 31 #endif 32 #include <string.h> 33 #include <limits.h> 34 #include <sys/types.h> 35 #include <sys/stat.h> 36 37 #ifndef _WIN32 38 #include <sys/time.h> 39 #else 40 #include <winsock2.h> /* for struct timeval */ 41 #endif 42 43 #include <assert.h> 44 #if defined(HAVE_MMAP) || defined(__CYGWIN__) 45 # include <unistd.h> 46 # include <sys/mman.h> 47 #endif 48 #if defined(_WIN32) 49 #include <sys/locking.h> 50 #endif 51 52 #ifndef O_BINARY 53 #define O_BINARY 0 54 #endif 55 56 #ifndef timercmp 57 /* This is not a required interface, so just provide it if missing */ 58 #define timercmp(tvp, uvp, cmp) \ 59 (((tvp)->tv_sec == (uvp)->tv_sec) ? \ 60 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \ 61 ((tvp)->tv_sec cmp (uvp)->tv_sec)) 62 #endif 63 64 65 FcBool 66 FcDirCacheCreateUUID (FcChar8 *dir, 67 FcBool force, 68 FcConfig *config) 69 { 70 return FcTrue; 71 } 72 73 FcBool 74 FcDirCacheDeleteUUID (const FcChar8 *dir, 75 FcConfig *config) 76 { 77 FcBool ret = FcTrue; 78 #if !defined TOOL_FCCACHE 79 #ifndef _WIN32 80 const FcChar8 *sysroot; 81 FcChar8 *target, *d; 82 struct stat statb; 83 struct timeval times[2]; 84 85 config = FcConfigReference (config); 86 if (!config) 87 return FcFalse; 88 sysroot = FcConfigGetSysRoot (config); 89 if (sysroot) 90 d = FcStrBuildFilename (sysroot, dir, NULL); 91 else 92 d = FcStrBuildFilename (dir, NULL); 93 if (FcStat (d, &statb) != 0) 94 { 95 ret = FcFalse; 96 goto bail; 97 } 98 target = FcStrBuildFilename (d, ".uuid", NULL); 99 ret = unlink ((char *) target) == 0; 100 if (ret) 101 { 102 times[0].tv_sec = statb.st_atime; 103 times[1].tv_sec = statb.st_mtime; 104 #ifdef HAVE_STRUCT_STAT_ST_MTIM 105 times[0].tv_usec = statb.st_atim.tv_nsec / 1000; 106 times[1].tv_usec = statb.st_mtim.tv_nsec / 1000; 107 #else 108 times[0].tv_usec = 0; 109 times[1].tv_usec = 0; 110 #endif 111 if (utimes ((const char *) d, times) != 0) 112 { 113 fprintf (stderr, "Unable to revert mtime: %s\n", d); 114 } 115 } 116 FcStrFree (target); 117 bail: 118 FcStrFree (d); 119 #endif 120 #endif 121 FcConfigDestroy (config); 122 123 return ret; 124 } 125 126 #define CACHEBASE_LEN (1 + 36 + 1 + sizeof (FC_ARCHITECTURE) + sizeof (FC_CACHE_SUFFIX)) 127 128 static FcBool 129 FcCacheIsMmapSafe (int fd) 130 { 131 enum { 132 MMAP_NOT_INITIALIZED = 0, 133 MMAP_USE, 134 MMAP_DONT_USE, 135 MMAP_CHECK_FS, 136 } status; 137 static void *static_status; 138 139 status = (intptr_t) fc_atomic_ptr_get (&static_status); 140 141 if (status == MMAP_NOT_INITIALIZED) 142 { 143 const char *env = getenv ("FONTCONFIG_USE_MMAP"); 144 FcBool use; 145 if (env && FcNameBool ((const FcChar8 *) env, &use)) 146 status = use ? MMAP_USE : MMAP_DONT_USE; 147 else 148 status = MMAP_CHECK_FS; 149 (void) fc_atomic_ptr_cmpexch (&static_status, NULL, (void *) (intptr_t) status); 150 } 151 152 if (status == MMAP_CHECK_FS) 153 return FcIsFsMmapSafe (fd); 154 else 155 return status == MMAP_USE; 156 157 } 158 159 static const char bin2hex[] = { '0', '1', '2', '3', 160 '4', '5', '6', '7', 161 '8', '9', 'a', 'b', 162 'c', 'd', 'e', 'f' }; 163 164 static FcChar8 * 165 FcDirCacheBasenameMD5 (FcConfig *config, const FcChar8 *dir, FcChar8 cache_base[CACHEBASE_LEN]) 166 { 167 FcChar8 *mapped_dir = NULL; 168 unsigned char hash[16]; 169 FcChar8 *hex_hash, *key = NULL; 170 int cnt; 171 struct MD5Context ctx; 172 const FcChar8 *salt, *orig_dir = NULL; 173 174 salt = FcConfigMapSalt (config, dir); 175 /* Obtain a path where "dir" is mapped to. 176 * In case: 177 * <remap-dir as-path="/usr/share/fonts">/run/host/fonts</remap-dir> 178 * 179 * FcConfigMapFontPath (config, "/run/host/fonts") will returns "/usr/share/fonts". 180 */ 181 mapped_dir = FcConfigMapFontPath(config, dir); 182 if (mapped_dir) 183 { 184 orig_dir = dir; 185 dir = mapped_dir; 186 } 187 if (salt) 188 { 189 size_t dl = strlen ((const char *) dir); 190 size_t sl = strlen ((const char *) salt); 191 192 key = (FcChar8 *) malloc (dl + sl + 1); 193 memcpy (key, dir, dl); 194 memcpy (key + dl, salt, sl + 1); 195 key[dl + sl] = 0; 196 if (!orig_dir) 197 orig_dir = dir; 198 dir = key; 199 } 200 MD5Init (&ctx); 201 MD5Update (&ctx, (const unsigned char *)dir, strlen ((const char *) dir)); 202 203 MD5Final (hash, &ctx); 204 205 if (key) 206 FcStrFree (key); 207 208 cache_base[0] = '/'; 209 hex_hash = cache_base + 1; 210 for (cnt = 0; cnt < 16; ++cnt) 211 { 212 hex_hash[2*cnt ] = bin2hex[hash[cnt] >> 4]; 213 hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf]; 214 } 215 hex_hash[2*cnt] = 0; 216 strcat ((char *) cache_base, "-" FC_ARCHITECTURE FC_CACHE_SUFFIX); 217 if (FcDebug() & FC_DBG_CACHE) 218 { 219 printf ("cache: %s (dir: %s%s%s%s%s%s)\n", cache_base, orig_dir ? orig_dir : dir, mapped_dir ? " (mapped to " : "", mapped_dir ? (char *)mapped_dir : "", mapped_dir ? ")" : "", salt ? ", salt: " : "", salt ? (char *)salt : ""); 220 } 221 222 if (mapped_dir) 223 FcStrFree(mapped_dir); 224 225 return cache_base; 226 } 227 228 #if !defined TOOL_FCCACHE 229 #ifndef _WIN32 230 static FcChar8 * 231 FcDirCacheBasenameUUID (FcConfig *config, const FcChar8 *dir, FcChar8 cache_base[CACHEBASE_LEN]) 232 { 233 FcChar8 *target, *fuuid; 234 const FcChar8 *sysroot = FcConfigGetSysRoot (config); 235 int fd; 236 237 /* We don't need to apply remapping here. because .uuid was created at that very directory 238 * to determine the cache name no matter where it was mapped to. 239 */ 240 cache_base[0] = 0; 241 if (sysroot) 242 target = FcStrBuildFilename (sysroot, dir, NULL); 243 else 244 target = FcStrdup (dir); 245 fuuid = FcStrBuildFilename (target, ".uuid", NULL); 246 if ((fd = FcOpen ((char *) fuuid, O_RDONLY)) != -1) 247 { 248 char suuid[37]; 249 ssize_t len; 250 251 memset (suuid, 0, sizeof (suuid)); 252 len = read (fd, suuid, 36); 253 suuid[36] = 0; 254 close (fd); 255 if (len < 0) 256 goto bail; 257 cache_base[0] = '/'; 258 strcpy ((char *)&cache_base[1], suuid); 259 strcat ((char *) cache_base, "-" FC_ARCHITECTURE FC_CACHE_SUFFIX); 260 if (FcDebug () & FC_DBG_CACHE) 261 { 262 printf ("cache fallbacks to: %s (dir: %s)\n", cache_base, dir); 263 } 264 } 265 bail: 266 FcStrFree (fuuid); 267 FcStrFree (target); 268 269 return cache_base; 270 } 271 #endif 272 #endif 273 274 FcBool 275 FcDirCacheUnlink (const FcChar8 *dir, FcConfig *config) 276 { 277 FcChar8 *cache_hashed = NULL; 278 FcChar8 cache_base[CACHEBASE_LEN]; 279 #if !defined TOOL_FCCACHE 280 #ifndef _WIN32 281 FcChar8 uuid_cache_base[CACHEBASE_LEN]; 282 #endif 283 #endif 284 FcStrList *list; 285 FcChar8 *cache_dir; 286 const FcChar8 *sysroot; 287 FcBool ret = FcTrue; 288 289 config = FcConfigReference (config); 290 if (!config) 291 return FcFalse; 292 sysroot = FcConfigGetSysRoot (config); 293 294 FcDirCacheBasenameMD5 (config, dir, cache_base); 295 #if !defined TOOL_FCCACHE 296 #ifndef _WIN32 297 FcDirCacheBasenameUUID (config, dir, uuid_cache_base); 298 #endif 299 #endif 300 301 list = FcStrListCreate (config->cacheDirs); 302 if (!list) 303 { 304 ret = FcFalse; 305 goto bail; 306 } 307 308 while ((cache_dir = FcStrListNext (list))) 309 { 310 if (sysroot) 311 cache_hashed = FcStrBuildFilename (sysroot, cache_dir, cache_base, NULL); 312 else 313 cache_hashed = FcStrBuildFilename (cache_dir, cache_base, NULL); 314 if (!cache_hashed) 315 break; 316 (void) unlink ((char *) cache_hashed); 317 FcStrFree (cache_hashed); 318 #if !defined TOOL_FCCACHE 319 #ifndef _WIN32 320 if (uuid_cache_base[0] != 0) 321 { 322 if (sysroot) 323 cache_hashed = FcStrBuildFilename (sysroot, cache_dir, uuid_cache_base, NULL); 324 else 325 cache_hashed = FcStrBuildFilename (cache_dir, uuid_cache_base, NULL); 326 if (!cache_hashed) 327 break; 328 (void) unlink ((char *) cache_hashed); 329 FcStrFree (cache_hashed); 330 } 331 #endif 332 #endif 333 } 334 FcStrListDone (list); 335 FcDirCacheDeleteUUID (dir, config); 336 /* return FcFalse if something went wrong */ 337 if (cache_dir) 338 ret = FcFalse; 339 bail: 340 FcConfigDestroy (config); 341 342 return ret; 343 } 344 345 static int 346 FcDirCacheOpenFile (const FcChar8 *cache_file, struct stat *file_stat) 347 { 348 int fd; 349 350 #if !defined TOOL_FCCACHE 351 #ifdef _WIN32 352 if (FcStat (cache_file, file_stat) < 0) 353 return -1; 354 #endif 355 #endif 356 fd = FcOpen((char *) cache_file, O_RDONLY | O_BINARY); 357 if (fd < 0) 358 return fd; 359 #if !defined TOOL_FCCACHE 360 #ifndef _WIN32 361 if (fstat (fd, file_stat) < 0) 362 { 363 close (fd); 364 return -1; 365 } 366 #endif 367 #endif 368 return fd; 369 } 370 371 /* 372 * Look for a cache file for the specified dir. Attempt 373 * to use each one we find, stopping when the callback 374 * indicates success 375 */ 376 static FcBool 377 FcDirCacheProcess (FcConfig *config, const FcChar8 *dir, 378 FcBool (*callback) (FcConfig *config, int fd, struct stat *fd_stat, 379 struct stat *dir_stat, struct timeval *cache_mtime, void *closure), 380 void *closure, FcChar8 **cache_file_ret) 381 { 382 int fd = -1; 383 FcChar8 cache_base[CACHEBASE_LEN]; 384 FcStrList *list; 385 FcChar8 *cache_dir, *d; 386 struct stat file_stat, dir_stat; 387 FcBool ret = FcFalse; 388 const FcChar8 *sysroot = FcConfigGetSysRoot (config); 389 struct timeval latest_mtime = (struct timeval){ 0 }; 390 391 if (sysroot) 392 d = FcStrBuildFilename (sysroot, dir, NULL); 393 else 394 d = FcStrdup (dir); 395 if (FcStatChecksum (d, &dir_stat) < 0) 396 { 397 FcStrFree (d); 398 return FcFalse; 399 } 400 FcStrFree (d); 401 402 FcDirCacheBasenameMD5 (config, dir, cache_base); 403 404 list = FcStrListCreate (config->cacheDirs); 405 if (!list) 406 return FcFalse; 407 408 while ((cache_dir = FcStrListNext (list))) 409 { 410 FcChar8 *cache_hashed; 411 #if !defined TOOL_FCCACHE 412 #ifndef _WIN32 413 FcBool retried = FcFalse; 414 #endif 415 #endif 416 417 if (sysroot) 418 cache_hashed = FcStrBuildFilename (sysroot, cache_dir, cache_base, NULL); 419 else 420 cache_hashed = FcStrBuildFilename (cache_dir, cache_base, NULL); 421 if (!cache_hashed) 422 break; 423 #if !defined TOOL_FCCACHE 424 #ifndef _WIN32 425 retry: 426 #endif 427 #endif 428 fd = FcDirCacheOpenFile (cache_hashed, &file_stat); 429 if (fd >= 0) { 430 ret = (*callback) (config, fd, &file_stat, &dir_stat, &latest_mtime, closure); 431 close (fd); 432 if (ret) 433 { 434 if (cache_file_ret) 435 { 436 if (*cache_file_ret) 437 FcStrFree (*cache_file_ret); 438 *cache_file_ret = cache_hashed; 439 } 440 else 441 FcStrFree (cache_hashed); 442 } 443 else 444 FcStrFree (cache_hashed); 445 } 446 #if !defined TOOL_FCCACHE 447 #ifndef _WIN32 448 else if (!retried) 449 { 450 FcChar8 uuid_cache_base[CACHEBASE_LEN]; 451 452 retried = FcTrue; 453 FcDirCacheBasenameUUID (config, dir, uuid_cache_base); 454 if (uuid_cache_base[0] != 0) 455 { 456 FcStrFree (cache_hashed); 457 if (sysroot) 458 cache_hashed = FcStrBuildFilename (sysroot, cache_dir, uuid_cache_base, NULL); 459 else 460 cache_hashed = FcStrBuildFilename (cache_dir, uuid_cache_base, NULL); 461 if (!cache_hashed) 462 break; 463 goto retry; 464 } 465 else 466 FcStrFree (cache_hashed); 467 } 468 #endif 469 #endif 470 else 471 FcStrFree (cache_hashed); 472 } 473 FcStrListDone (list); 474 475 if (closure) 476 return !!(*((FcCache **)closure) != NULL); 477 return ret; 478 } 479 480 #define FC_CACHE_MIN_MMAP 1024 481 482 /* 483 * Skip list element, make sure the 'next' pointer is the last thing 484 * in the structure, it will be allocated large enough to hold all 485 * of the necessary pointers 486 */ 487 488 typedef struct _FcCacheSkip FcCacheSkip; 489 490 struct _FcCacheSkip { 491 FcCache *cache; 492 FcRef ref; 493 intptr_t size; 494 void *allocated; 495 dev_t cache_dev; 496 ino_t cache_ino; 497 time_t cache_mtime; 498 long cache_mtime_nano; 499 FcCacheSkip *next[1]; 500 }; 501 502 /* 503 * The head of the skip list; pointers for every possible level 504 * in the skip list, plus the largest level in the list 505 */ 506 507 #define FC_CACHE_MAX_LEVEL 16 508 509 /* Protected by cache_lock below */ 510 static FcCacheSkip *fcCacheChains[FC_CACHE_MAX_LEVEL]; 511 static int fcCacheMaxLevel; 512 513 514 static FcMutex *cache_lock; 515 516 static void 517 lock_cache (void) 518 { 519 FcMutex *lock; 520 retry: 521 lock = fc_atomic_ptr_get (&cache_lock); 522 if (!lock) { 523 lock = (FcMutex *) malloc (sizeof (FcMutex)); 524 FcMutexInit (lock); 525 if (!fc_atomic_ptr_cmpexch (&cache_lock, NULL, lock)) { 526 FcMutexFinish (lock); 527 free (lock); 528 goto retry; 529 } 530 531 FcMutexLock (lock); 532 /* Initialize random state */ 533 FcRandom (); 534 return; 535 } 536 FcMutexLock (lock); 537 } 538 539 static void 540 unlock_cache (void) 541 { 542 FcMutex *lock; 543 lock = fc_atomic_ptr_get (&cache_lock); 544 FcMutexUnlock (lock); 545 } 546 547 static void 548 free_lock (void) 549 { 550 FcMutex *lock; 551 lock = fc_atomic_ptr_get (&cache_lock); 552 if (lock && fc_atomic_ptr_cmpexch (&cache_lock, lock, NULL)) { 553 FcMutexFinish (lock); 554 free (((void *)(uintptr_t)lock)); 555 } 556 } 557 558 559 560 /* 561 * Generate a random level number, distributed 562 * so that each level is 1/4 as likely as the one before 563 * 564 * Note that level numbers run 1 <= level <= MAX_LEVEL 565 */ 566 static int 567 random_level (void) 568 { 569 /* tricky bit -- each bit is '1' 75% of the time */ 570 long int bits = FcRandom () | FcRandom (); 571 int level = 0; 572 573 while (++level < FC_CACHE_MAX_LEVEL) 574 { 575 if (bits & 1) 576 break; 577 bits >>= 1; 578 } 579 return level; 580 } 581 582 /* 583 * Insert cache into the list 584 */ 585 static FcBool 586 FcCacheInsert (FcCache *cache, struct stat *cache_stat) 587 { 588 FcCacheSkip **update[FC_CACHE_MAX_LEVEL]; 589 FcCacheSkip *s, **next; 590 int i, level; 591 592 lock_cache (); 593 594 /* 595 * Find links along each chain 596 */ 597 next = fcCacheChains; 598 for (i = fcCacheMaxLevel; --i >= 0; ) 599 { 600 for (; (s = next[i]); next = s->next) 601 if (s->cache > cache) 602 break; 603 update[i] = &next[i]; 604 } 605 606 /* 607 * Create new list element 608 */ 609 level = random_level (); 610 if (level > fcCacheMaxLevel) 611 { 612 level = fcCacheMaxLevel + 1; 613 update[fcCacheMaxLevel] = &fcCacheChains[fcCacheMaxLevel]; 614 fcCacheMaxLevel = level; 615 } 616 617 s = malloc (sizeof (FcCacheSkip) + (level - 1) * sizeof (FcCacheSkip *)); 618 if (!s) 619 return FcFalse; 620 621 s->cache = cache; 622 s->size = cache->size; 623 s->allocated = NULL; 624 FcRefInit (&s->ref, 1); 625 if (cache_stat) 626 { 627 s->cache_dev = cache_stat->st_dev; 628 s->cache_ino = cache_stat->st_ino; 629 s->cache_mtime = cache_stat->st_mtime; 630 #ifdef HAVE_STRUCT_STAT_ST_MTIM 631 s->cache_mtime_nano = cache_stat->st_mtim.tv_nsec; 632 #else 633 s->cache_mtime_nano = 0; 634 #endif 635 } 636 else 637 { 638 s->cache_dev = 0; 639 s->cache_ino = 0; 640 s->cache_mtime = 0; 641 s->cache_mtime_nano = 0; 642 } 643 644 /* 645 * Insert into all fcCacheChains 646 */ 647 for (i = 0; i < level; i++) 648 { 649 s->next[i] = *update[i]; 650 *update[i] = s; 651 } 652 653 unlock_cache (); 654 return FcTrue; 655 } 656 657 static FcCacheSkip * 658 FcCacheFindByAddrUnlocked (void *object) 659 { 660 int i; 661 FcCacheSkip **next = fcCacheChains; 662 FcCacheSkip *s; 663 664 if (!object) 665 return NULL; 666 667 /* 668 * Walk chain pointers one level at a time 669 */ 670 for (i = fcCacheMaxLevel; --i >= 0;) 671 while (next[i] && (char *) object >= ((char *) next[i]->cache + next[i]->size)) 672 next = next[i]->next; 673 /* 674 * Here we are 675 */ 676 s = next[0]; 677 if (s && (char *) object < ((char *) s->cache + s->size)) 678 return s; 679 return NULL; 680 } 681 682 static FcCacheSkip * 683 FcCacheFindByAddr (void *object) 684 { 685 FcCacheSkip *ret; 686 lock_cache (); 687 ret = FcCacheFindByAddrUnlocked (object); 688 unlock_cache (); 689 return ret; 690 } 691 692 static void 693 FcCacheRemoveUnlocked (FcCache *cache) 694 { 695 FcCacheSkip **update[FC_CACHE_MAX_LEVEL]; 696 FcCacheSkip *s, **next; 697 int i; 698 void *allocated; 699 700 /* 701 * Find links along each chain 702 */ 703 next = fcCacheChains; 704 for (i = fcCacheMaxLevel; --i >= 0; ) 705 { 706 for (; (s = next[i]); next = s->next) 707 if (s->cache >= cache) 708 break; 709 update[i] = &next[i]; 710 } 711 s = next[0]; 712 for (i = 0; i < fcCacheMaxLevel && *update[i] == s; i++) 713 *update[i] = s->next[i]; 714 while (fcCacheMaxLevel > 0 && fcCacheChains[fcCacheMaxLevel - 1] == NULL) 715 fcCacheMaxLevel--; 716 717 if (s) 718 { 719 allocated = s->allocated; 720 while (allocated) 721 { 722 /* First element in allocated chunk is the free list */ 723 next = *(void **)allocated; 724 free (allocated); 725 allocated = next; 726 } 727 free (s); 728 } 729 } 730 731 static FcCache * 732 FcCacheFindByStat (struct stat *cache_stat) 733 { 734 FcCacheSkip *s; 735 736 lock_cache (); 737 for (s = fcCacheChains[0]; s; s = s->next[0]) 738 if (s->cache_dev == cache_stat->st_dev && 739 s->cache_ino == cache_stat->st_ino && 740 s->cache_mtime == cache_stat->st_mtime) 741 { 742 #ifdef HAVE_STRUCT_STAT_ST_MTIM 743 if (s->cache_mtime_nano != cache_stat->st_mtim.tv_nsec) 744 continue; 745 #endif 746 FcRefInc (&s->ref); 747 unlock_cache (); 748 return s->cache; 749 } 750 unlock_cache (); 751 return NULL; 752 } 753 754 static void 755 FcDirCacheDisposeUnlocked (FcCache *cache) 756 { 757 FcCacheRemoveUnlocked (cache); 758 759 switch (cache->magic) { 760 case FC_CACHE_MAGIC_ALLOC: 761 free (cache); 762 break; 763 case FC_CACHE_MAGIC_MMAP: 764 #if defined(HAVE_MMAP) || defined(__CYGWIN__) 765 munmap (cache, cache->size); 766 #elif defined(_WIN32) 767 UnmapViewOfFile (cache); 768 #endif 769 break; 770 } 771 } 772 773 void 774 FcCacheObjectReference (void *object) 775 { 776 FcCacheSkip *skip = FcCacheFindByAddr (object); 777 778 if (skip) 779 FcRefInc (&skip->ref); 780 } 781 782 void 783 FcCacheObjectDereference (void *object) 784 { 785 FcCacheSkip *skip; 786 787 lock_cache (); 788 skip = FcCacheFindByAddrUnlocked (object); 789 if (skip) 790 { 791 if (FcRefDec (&skip->ref) == 1) 792 FcDirCacheDisposeUnlocked (skip->cache); 793 } 794 unlock_cache (); 795 } 796 797 void * 798 FcCacheAllocate (FcCache *cache, size_t len) 799 { 800 FcCacheSkip *skip; 801 void *allocated = NULL; 802 803 lock_cache (); 804 skip = FcCacheFindByAddrUnlocked (cache); 805 if (skip) 806 { 807 void *chunk = malloc (sizeof (void *) + len); 808 if (chunk) 809 { 810 /* First element in allocated chunk is the free list */ 811 *(void **)chunk = skip->allocated; 812 skip->allocated = chunk; 813 /* Return the rest */ 814 allocated = ((FcChar8 *)chunk) + sizeof (void *); 815 } 816 } 817 unlock_cache (); 818 return allocated; 819 } 820 821 void 822 FcCacheFini (void) 823 { 824 int i; 825 826 if (FcDebug() & FC_DBG_CACHE) 827 { 828 for (i = 0; i < FC_CACHE_MAX_LEVEL; i++) 829 { 830 if (fcCacheChains[i] != NULL) 831 { 832 FcCacheSkip *s = fcCacheChains[i]; 833 fprintf(stderr, "Fontconfig error: not freed %p (dir: %s, refcount %" FC_ATOMIC_INT_FORMAT ")\n", s->cache, FcCacheDir(s->cache), s->ref.count); 834 } 835 } 836 } 837 838 free_lock (); 839 } 840 841 static FcBool 842 FcCacheTimeValid (FcConfig *config, FcCache *cache, struct stat *dir_stat) 843 { 844 struct stat dir_static; 845 FcBool fnano = FcTrue; 846 847 if (!dir_stat) 848 { 849 const FcChar8 *sysroot = FcConfigGetSysRoot (config); 850 FcChar8 *d; 851 852 if (sysroot) 853 d = FcStrBuildFilename (sysroot, FcCacheDir (cache), NULL); 854 else 855 d = FcStrdup (FcCacheDir (cache)); 856 if (FcStatChecksum (d, &dir_static) < 0) 857 { 858 FcStrFree (d); 859 return FcFalse; 860 } 861 FcStrFree (d); 862 dir_stat = &dir_static; 863 } 864 #ifdef HAVE_STRUCT_STAT_ST_MTIM 865 fnano = (cache->checksum_nano == dir_stat->st_mtim.tv_nsec); 866 if (FcDebug () & FC_DBG_CACHE) 867 printf ("FcCacheTimeValid dir \"%s\" cache checksum %d.%ld dir checksum %d.%ld\n", 868 FcCacheDir (cache), cache->checksum, (long)cache->checksum_nano, (int) dir_stat->st_mtime, dir_stat->st_mtim.tv_nsec); 869 #else 870 if (FcDebug () & FC_DBG_CACHE) 871 printf ("FcCacheTimeValid dir \"%s\" cache checksum %d dir checksum %d\n", 872 FcCacheDir (cache), cache->checksum, (int) dir_stat->st_mtime); 873 #endif 874 875 return dir_stat->st_mtime == 0 || (cache->checksum == (int) dir_stat->st_mtime && fnano); 876 } 877 878 static FcBool 879 FcCacheOffsetsValid (FcCache *cache) 880 { 881 char *base = (char *)cache; 882 char *end = base + cache->size; 883 intptr_t *dirs; 884 FcFontSet *fs; 885 int i, j; 886 887 if (cache->dir < 0 || cache->dir > cache->size - sizeof (intptr_t) || 888 memchr (base + cache->dir, '\0', cache->size - cache->dir) == NULL) 889 return FcFalse; 890 891 if (cache->dirs < 0 || cache->dirs >= cache->size || 892 cache->dirs_count < 0 || 893 cache->dirs_count > (cache->size - cache->dirs) / sizeof (intptr_t)) 894 return FcFalse; 895 896 dirs = FcCacheDirs (cache); 897 if (dirs) 898 { 899 for (i = 0; i < cache->dirs_count; i++) 900 { 901 FcChar8 *dir; 902 903 if (dirs[i] < 0 || 904 dirs[i] > end - (char *) dirs - sizeof (intptr_t)) 905 return FcFalse; 906 907 dir = FcOffsetToPtr (dirs, dirs[i], FcChar8); 908 if (memchr (dir, '\0', end - (char *) dir) == NULL) 909 return FcFalse; 910 } 911 } 912 913 if (cache->set < 0 || cache->set > cache->size - sizeof (FcFontSet)) 914 return FcFalse; 915 916 fs = FcCacheSet (cache); 917 if (fs) 918 { 919 if (fs->nfont > (end - (char *) fs) / sizeof (FcPattern)) 920 return FcFalse; 921 922 if (!FcIsEncodedOffset(fs->fonts)) 923 return FcFalse; 924 925 for (i = 0; i < fs->nfont; i++) 926 { 927 FcPattern *font = FcFontSetFont (fs, i); 928 FcPatternElt *e; 929 FcValueListPtr l; 930 char *last_offset; 931 932 if ((char *) font < base || 933 (char *) font > end - sizeof (FcFontSet) || 934 font->elts_offset < 0 || 935 font->elts_offset > end - (char *) font || 936 font->num > (end - (char *) font - font->elts_offset) / sizeof (FcPatternElt) || 937 !FcRefIsConst (&font->ref)) 938 return FcFalse; 939 940 941 e = FcPatternElts(font); 942 if (e->values != 0 && !FcIsEncodedOffset(e->values)) 943 return FcFalse; 944 945 for (j = 0; j < font->num; j++) 946 { 947 last_offset = (char *) font + font->elts_offset; 948 for (l = FcPatternEltValues(&e[j]); l; l = FcValueListNext(l)) 949 { 950 if ((char *) l < last_offset || (char *) l > end - sizeof (*l) || 951 (l->next != NULL && !FcIsEncodedOffset(l->next))) 952 return FcFalse; 953 last_offset = (char *) l + 1; 954 } 955 } 956 } 957 } 958 959 return FcTrue; 960 } 961 962 /* 963 * Map a cache file into memory 964 */ 965 static FcCache * 966 FcDirCacheMapFd (FcConfig *config, int fd, struct stat *fd_stat, struct stat *dir_stat) 967 { 968 FcCache *cache; 969 FcBool allocated = FcFalse; 970 971 if (fd_stat->st_size > INTPTR_MAX || 972 fd_stat->st_size < (int) sizeof (FcCache)) 973 return NULL; 974 cache = FcCacheFindByStat (fd_stat); 975 if (cache) 976 { 977 if (FcCacheTimeValid (config, cache, dir_stat)) 978 return cache; 979 FcDirCacheUnload (cache); 980 cache = NULL; 981 } 982 983 /* 984 * Large cache files are mmap'ed, smaller cache files are read. This 985 * balances the system cost of mmap against per-process memory usage. 986 */ 987 if (FcCacheIsMmapSafe (fd) && fd_stat->st_size >= FC_CACHE_MIN_MMAP) 988 { 989 #if defined(HAVE_MMAP) || defined(__CYGWIN__) 990 cache = mmap (0, fd_stat->st_size, PROT_READ, MAP_SHARED, fd, 0); 991 #if defined(HAVE_POSIX_FADVISE) && defined(POSIX_FADV_WILLNEED) 992 posix_fadvise (fd, 0, fd_stat->st_size, POSIX_FADV_WILLNEED); 993 #endif 994 if (cache == MAP_FAILED) 995 cache = NULL; 996 #elif defined(_WIN32) 997 { 998 HANDLE hFileMap; 999 1000 cache = NULL; 1001 hFileMap = CreateFileMapping((HANDLE) _get_osfhandle(fd), NULL, 1002 PAGE_READONLY, 0, 0, NULL); 1003 if (hFileMap != NULL) 1004 { 1005 cache = MapViewOfFile (hFileMap, FILE_MAP_READ, 0, 0, 1006 fd_stat->st_size); 1007 CloseHandle (hFileMap); 1008 } 1009 } 1010 #endif 1011 } 1012 if (!cache) 1013 { 1014 cache = malloc (fd_stat->st_size); 1015 if (!cache) 1016 return NULL; 1017 1018 if (read (fd, cache, fd_stat->st_size) != fd_stat->st_size) 1019 { 1020 free (cache); 1021 return NULL; 1022 } 1023 allocated = FcTrue; 1024 } 1025 if (cache->magic != FC_CACHE_MAGIC_MMAP || 1026 cache->version < FC_CACHE_VERSION_NUMBER || 1027 cache->size != (intptr_t) fd_stat->st_size || 1028 !FcCacheOffsetsValid (cache) || 1029 !FcCacheTimeValid (config, cache, dir_stat) || 1030 !FcCacheInsert (cache, fd_stat)) 1031 { 1032 if (allocated) 1033 free (cache); 1034 else 1035 { 1036 #if defined(HAVE_MMAP) || defined(__CYGWIN__) 1037 munmap (cache, fd_stat->st_size); 1038 #elif defined(_WIN32) 1039 UnmapViewOfFile (cache); 1040 #endif 1041 } 1042 return NULL; 1043 } 1044 1045 /* Mark allocated caches so they're freed rather than unmapped */ 1046 if (allocated) 1047 cache->magic = FC_CACHE_MAGIC_ALLOC; 1048 1049 return cache; 1050 } 1051 1052 void 1053 FcDirCacheReference (FcCache *cache, int nref) 1054 { 1055 FcCacheSkip *skip = FcCacheFindByAddr (cache); 1056 1057 if (skip) 1058 FcRefAdd (&skip->ref, nref); 1059 } 1060 1061 void 1062 FcDirCacheUnload (FcCache *cache) 1063 { 1064 FcCacheObjectDereference (cache); 1065 } 1066 1067 static FcBool 1068 FcDirCacheMapHelper (FcConfig *config, int fd, struct stat *fd_stat, struct stat *dir_stat, struct timeval *latest_cache_mtime, void *closure) 1069 { 1070 FcCache *cache = FcDirCacheMapFd (config, fd, fd_stat, dir_stat); 1071 struct timeval cache_mtime, zero_mtime = { 0, 0}, dir_mtime; 1072 1073 if (!cache) 1074 return FcFalse; 1075 cache_mtime.tv_sec = fd_stat->st_mtime; 1076 dir_mtime.tv_sec = dir_stat->st_mtime; 1077 #ifdef HAVE_STRUCT_STAT_ST_MTIM 1078 cache_mtime.tv_usec = fd_stat->st_mtim.tv_nsec / 1000; 1079 dir_mtime.tv_usec = dir_stat->st_mtim.tv_nsec / 1000; 1080 #else 1081 cache_mtime.tv_usec = 0; 1082 dir_mtime.tv_usec = 0; 1083 #endif 1084 /* special take care of OSTree */ 1085 if (!timercmp (&zero_mtime, &dir_mtime, !=)) 1086 { 1087 if (!timercmp (&zero_mtime, &cache_mtime, !=)) 1088 { 1089 if (*((FcCache **) closure)) 1090 FcDirCacheUnload (*((FcCache **) closure)); 1091 } 1092 else if (*((FcCache **) closure) && !timercmp (&zero_mtime, latest_cache_mtime, !=)) 1093 { 1094 FcDirCacheUnload (cache); 1095 return FcFalse; 1096 } 1097 else if (timercmp (latest_cache_mtime, &cache_mtime, <)) 1098 { 1099 if (*((FcCache **) closure)) 1100 FcDirCacheUnload (*((FcCache **) closure)); 1101 } 1102 } 1103 else if (timercmp (latest_cache_mtime, &cache_mtime, <)) 1104 { 1105 if (*((FcCache **) closure)) 1106 FcDirCacheUnload (*((FcCache **) closure)); 1107 } 1108 else 1109 { 1110 FcDirCacheUnload (cache); 1111 return FcFalse; 1112 } 1113 latest_cache_mtime->tv_sec = cache_mtime.tv_sec; 1114 latest_cache_mtime->tv_usec = cache_mtime.tv_usec; 1115 *((FcCache **) closure) = cache; 1116 return FcTrue; 1117 } 1118 1119 FcCache * 1120 FcDirCacheLoad (const FcChar8 *dir, FcConfig *config, FcChar8 **cache_file) 1121 { 1122 FcCache *cache = NULL; 1123 1124 config = FcConfigReference (config); 1125 if (!config) 1126 return NULL; 1127 if (!FcDirCacheProcess (config, dir, 1128 FcDirCacheMapHelper, 1129 &cache, cache_file)) 1130 cache = NULL; 1131 1132 FcConfigDestroy (config); 1133 1134 return cache; 1135 } 1136 1137 FcCache * 1138 FcDirCacheLoadFile (const FcChar8 *cache_file, struct stat *file_stat) 1139 { 1140 int fd; 1141 FcCache *cache = NULL; 1142 struct stat my_file_stat; 1143 FcConfig *config; 1144 1145 if (!file_stat) 1146 file_stat = &my_file_stat; 1147 config = FcConfigReference (NULL); 1148 if (!config) 1149 return NULL; 1150 fd = FcDirCacheOpenFile (cache_file, file_stat); 1151 if (fd >= 0) 1152 { 1153 cache = FcDirCacheMapFd (config, fd, file_stat, NULL); 1154 close (fd); 1155 } 1156 FcConfigDestroy (config); 1157 1158 return cache; 1159 } 1160 1161 static int 1162 FcDirChecksum (struct stat *statb) 1163 { 1164 int ret = (int) statb->st_mtime; 1165 char *endptr; 1166 char *source_date_epoch; 1167 unsigned long long epoch; 1168 1169 source_date_epoch = getenv("SOURCE_DATE_EPOCH"); 1170 if (source_date_epoch) 1171 { 1172 errno = 0; 1173 epoch = strtoull(source_date_epoch, &endptr, 10); 1174 1175 if (endptr == source_date_epoch) 1176 fprintf (stderr, 1177 "Fontconfig: SOURCE_DATE_EPOCH invalid\n"); 1178 else if ((errno == ERANGE && (epoch == ULLONG_MAX || epoch == 0)) 1179 || (errno != 0 && epoch == 0)) 1180 fprintf (stderr, 1181 "Fontconfig: SOURCE_DATE_EPOCH: strtoull: %s: %" FC_UINT64_FORMAT "\n", 1182 strerror(errno), epoch); 1183 else if (*endptr != '\0') 1184 fprintf (stderr, 1185 "Fontconfig: SOURCE_DATE_EPOCH has trailing garbage\n"); 1186 else if (epoch > ULONG_MAX) 1187 fprintf (stderr, 1188 "Fontconfig: SOURCE_DATE_EPOCH must be <= %lu but saw: %" FC_UINT64_FORMAT "\n", 1189 ULONG_MAX, epoch); 1190 else if (epoch < ret) 1191 /* Only override if directory is newer */ 1192 ret = (int) epoch; 1193 } 1194 1195 return ret; 1196 } 1197 1198 static int64_t 1199 FcDirChecksumNano (struct stat *statb) 1200 { 1201 #ifdef HAVE_STRUCT_STAT_ST_MTIM 1202 /* No nanosecond component to parse */ 1203 if (getenv("SOURCE_DATE_EPOCH")) 1204 return 0; 1205 return statb->st_mtim.tv_nsec; 1206 #else 1207 return 0; 1208 #endif 1209 } 1210 1211 /* 1212 * Validate a cache file by reading the header and checking 1213 * the magic number and the size field 1214 */ 1215 static FcBool 1216 FcDirCacheValidateHelper (FcConfig *config, int fd, struct stat *fd_stat, struct stat *dir_stat, struct timeval *latest_cache_mtime, void *closure FC_UNUSED) 1217 { 1218 FcBool ret = FcTrue; 1219 FcCache c; 1220 1221 if (read (fd, &c, sizeof (FcCache)) != sizeof (FcCache)) 1222 ret = FcFalse; 1223 else if (c.magic != FC_CACHE_MAGIC_MMAP) 1224 ret = FcFalse; 1225 else if (c.version < FC_CACHE_VERSION_NUMBER) 1226 ret = FcFalse; 1227 else if (fd_stat->st_size != c.size) 1228 ret = FcFalse; 1229 else if (c.checksum != FcDirChecksum (dir_stat)) 1230 ret = FcFalse; 1231 #ifdef HAVE_STRUCT_STAT_ST_MTIM 1232 else if (c.checksum_nano != FcDirChecksumNano (dir_stat)) 1233 ret = FcFalse; 1234 #endif 1235 return ret; 1236 } 1237 1238 static FcBool 1239 FcDirCacheValidConfig (const FcChar8 *dir, FcConfig *config) 1240 { 1241 return FcDirCacheProcess (config, dir, 1242 FcDirCacheValidateHelper, 1243 NULL, NULL); 1244 } 1245 1246 FcBool 1247 FcDirCacheValid (const FcChar8 *dir) 1248 { 1249 FcConfig *config; 1250 FcBool ret; 1251 1252 config = FcConfigReference (NULL); 1253 if (!config) 1254 return FcFalse; 1255 1256 ret = FcDirCacheValidConfig (dir, config); 1257 FcConfigDestroy (config); 1258 1259 return ret; 1260 } 1261 1262 /* 1263 * Build a cache structure from the given contents 1264 */ 1265 FcCache * 1266 FcDirCacheBuild (FcFontSet *set, const FcChar8 *dir, struct stat *dir_stat, FcStrSet *dirs) 1267 { 1268 FcSerialize *serialize = FcSerializeCreate (); 1269 FcCache *cache; 1270 int i; 1271 FcChar8 *dir_serialize; 1272 intptr_t *dirs_serialize; 1273 FcFontSet *set_serialize; 1274 1275 if (!serialize) 1276 return NULL; 1277 /* 1278 * Space for cache structure 1279 */ 1280 FcSerializeReserve (serialize, sizeof (FcCache)); 1281 /* 1282 * Directory name 1283 */ 1284 if (!FcStrSerializeAlloc (serialize, dir)) 1285 goto bail1; 1286 /* 1287 * Subdirs 1288 */ 1289 FcSerializeAlloc (serialize, dirs, dirs->num * sizeof (FcChar8 *)); 1290 for (i = 0; i < dirs->num; i++) 1291 if (!FcStrSerializeAlloc (serialize, dirs->strs[i])) 1292 goto bail1; 1293 1294 /* 1295 * Patterns 1296 */ 1297 if (!FcFontSetSerializeAlloc (serialize, set)) 1298 goto bail1; 1299 1300 /* Serialize layout complete. Now allocate space and fill it */ 1301 cache = malloc (serialize->size); 1302 if (!cache) 1303 goto bail1; 1304 /* shut up valgrind */ 1305 memset (cache, 0, serialize->size); 1306 1307 serialize->linear = cache; 1308 1309 cache->magic = FC_CACHE_MAGIC_ALLOC; 1310 cache->version = FC_CACHE_VERSION_NUMBER; 1311 cache->size = serialize->size; 1312 cache->checksum = FcDirChecksum (dir_stat); 1313 cache->checksum_nano = FcDirChecksumNano (dir_stat); 1314 1315 /* 1316 * Serialize directory name 1317 */ 1318 dir_serialize = FcStrSerialize (serialize, dir); 1319 if (!dir_serialize) 1320 goto bail2; 1321 cache->dir = FcPtrToOffset (cache, dir_serialize); 1322 1323 /* 1324 * Serialize sub dirs 1325 */ 1326 dirs_serialize = FcSerializePtr (serialize, dirs); 1327 if (!dirs_serialize) 1328 goto bail2; 1329 cache->dirs = FcPtrToOffset (cache, dirs_serialize); 1330 cache->dirs_count = dirs->num; 1331 for (i = 0; i < dirs->num; i++) 1332 { 1333 FcChar8 *d_serialize = FcStrSerialize (serialize, dirs->strs[i]); 1334 if (!d_serialize) 1335 goto bail2; 1336 dirs_serialize[i] = FcPtrToOffset (dirs_serialize, d_serialize); 1337 } 1338 1339 /* 1340 * Serialize font set 1341 */ 1342 set_serialize = FcFontSetSerialize (serialize, set); 1343 if (!set_serialize) 1344 goto bail2; 1345 cache->set = FcPtrToOffset (cache, set_serialize); 1346 1347 FcSerializeDestroy (serialize); 1348 1349 FcCacheInsert (cache, NULL); 1350 1351 return cache; 1352 1353 bail2: 1354 free (cache); 1355 bail1: 1356 FcSerializeDestroy (serialize); 1357 return NULL; 1358 } 1359 1360 FcCache * 1361 FcDirCacheRebuild (FcCache *cache, struct stat *dir_stat, FcStrSet *dirs) 1362 { 1363 FcCache *new; 1364 FcFontSet *set = FcFontSetDeserialize (FcCacheSet (cache)); 1365 const FcChar8 *dir = FcCacheDir (cache); 1366 1367 new = FcDirCacheBuild (set, dir, dir_stat, dirs); 1368 FcFontSetDestroy (set); 1369 1370 return new; 1371 } 1372 1373 /* write serialized state to the cache file */ 1374 FcBool 1375 FcDirCacheWrite (FcCache *cache, FcConfig *config) 1376 { 1377 FcChar8 *dir = FcCacheDir (cache); 1378 FcChar8 cache_base[CACHEBASE_LEN]; 1379 FcChar8 *cache_hashed; 1380 int fd; 1381 FcAtomic *atomic; 1382 FcStrList *list; 1383 FcChar8 *cache_dir = NULL; 1384 FcChar8 *test_dir, *d = NULL; 1385 FcCacheSkip *skip; 1386 struct stat cache_stat; 1387 unsigned int magic; 1388 int written; 1389 const FcChar8 *sysroot = FcConfigGetSysRoot (config); 1390 1391 /* 1392 * Write it to the first directory in the list which is writable 1393 */ 1394 1395 list = FcStrListCreate (config->cacheDirs); 1396 if (!list) 1397 return FcFalse; 1398 while ((test_dir = FcStrListNext (list))) 1399 { 1400 if (d) 1401 FcStrFree (d); 1402 if (sysroot) 1403 d = FcStrBuildFilename (sysroot, test_dir, NULL); 1404 else 1405 d = FcStrCopyFilename (test_dir); 1406 1407 if (access ((char *) d, W_OK) == 0) 1408 { 1409 cache_dir = FcStrCopyFilename (d); 1410 break; 1411 } 1412 else 1413 { 1414 /* 1415 * If the directory doesn't exist, try to create it 1416 */ 1417 if (access ((char *) d, F_OK) == -1) { 1418 if (FcMakeDirectory (d)) 1419 { 1420 cache_dir = FcStrCopyFilename (d); 1421 /* Create CACHEDIR.TAG */ 1422 FcDirCacheCreateTagFile (d); 1423 break; 1424 } 1425 } 1426 /* 1427 * Otherwise, try making it writable 1428 */ 1429 else if (chmod ((char *) d, 0755) == 0) 1430 { 1431 cache_dir = FcStrCopyFilename (d); 1432 /* Try to create CACHEDIR.TAG too */ 1433 FcDirCacheCreateTagFile (d); 1434 break; 1435 } 1436 } 1437 } 1438 if (!test_dir) 1439 fprintf (stderr, "Fontconfig error: No writable cache directories\n"); 1440 if (d) 1441 FcStrFree (d); 1442 FcStrListDone (list); 1443 if (!cache_dir) 1444 return FcFalse; 1445 1446 FcDirCacheBasenameMD5 (config, dir, cache_base); 1447 cache_hashed = FcStrBuildFilename (cache_dir, cache_base, NULL); 1448 FcStrFree (cache_dir); 1449 if (!cache_hashed) 1450 return FcFalse; 1451 1452 if (FcDebug () & FC_DBG_CACHE) 1453 printf ("FcDirCacheWriteDir dir \"%s\" file \"%s\"\n", 1454 dir, cache_hashed); 1455 1456 atomic = FcAtomicCreate ((FcChar8 *)cache_hashed); 1457 if (!atomic) 1458 goto bail1; 1459 1460 if (!FcAtomicLock (atomic)) 1461 goto bail3; 1462 1463 fd = FcOpen((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT | O_BINARY, 0666); 1464 if (fd == -1) 1465 goto bail4; 1466 1467 /* Temporarily switch magic to MMAP while writing to file */ 1468 magic = cache->magic; 1469 if (magic != FC_CACHE_MAGIC_MMAP) 1470 cache->magic = FC_CACHE_MAGIC_MMAP; 1471 1472 /* 1473 * Write cache contents to file 1474 */ 1475 written = write (fd, cache, cache->size); 1476 1477 /* Switch magic back */ 1478 if (magic != FC_CACHE_MAGIC_MMAP) 1479 cache->magic = magic; 1480 1481 if (written != cache->size) 1482 { 1483 perror ("write cache"); 1484 goto bail5; 1485 } 1486 1487 close(fd); 1488 if (!FcAtomicReplaceOrig(atomic)) 1489 goto bail4; 1490 1491 /* If the file is small, update the cache chain entry such that the 1492 * new cache file is not read again. If it's large, we don't do that 1493 * such that we reload it, using mmap, which is shared across processes. 1494 */ 1495 if (cache->size < FC_CACHE_MIN_MMAP && FcStat (cache_hashed, &cache_stat)) 1496 { 1497 lock_cache (); 1498 if ((skip = FcCacheFindByAddrUnlocked (cache))) 1499 { 1500 skip->cache_dev = cache_stat.st_dev; 1501 skip->cache_ino = cache_stat.st_ino; 1502 skip->cache_mtime = cache_stat.st_mtime; 1503 #ifdef HAVE_STRUCT_STAT_ST_MTIM 1504 skip->cache_mtime_nano = cache_stat.st_mtim.tv_nsec; 1505 #else 1506 skip->cache_mtime_nano = 0; 1507 #endif 1508 } 1509 unlock_cache (); 1510 } 1511 1512 FcStrFree (cache_hashed); 1513 FcAtomicUnlock (atomic); 1514 FcAtomicDestroy (atomic); 1515 return FcTrue; 1516 1517 bail5: 1518 close (fd); 1519 bail4: 1520 FcAtomicUnlock (atomic); 1521 bail3: 1522 FcAtomicDestroy (atomic); 1523 bail1: 1524 FcStrFree (cache_hashed); 1525 return FcFalse; 1526 } 1527 1528 FcBool 1529 FcDirCacheClean (const FcChar8 *cache_dir, FcBool verbose) 1530 { 1531 DIR *d; 1532 struct dirent *ent; 1533 FcChar8 *dir; 1534 FcBool ret = FcTrue; 1535 FcBool remove; 1536 FcCache *cache; 1537 struct stat target_stat; 1538 const FcChar8 *sysroot; 1539 FcConfig *config; 1540 1541 config = FcConfigReference (NULL); 1542 if (!config) 1543 return FcFalse; 1544 /* FIXME: this API needs to support non-current FcConfig */ 1545 sysroot = FcConfigGetSysRoot (config); 1546 if (sysroot) 1547 dir = FcStrBuildFilename (sysroot, cache_dir, NULL); 1548 else 1549 dir = FcStrCopyFilename (cache_dir); 1550 if (!dir) 1551 { 1552 fprintf (stderr, "Fontconfig error: %s: out of memory\n", cache_dir); 1553 ret = FcFalse; 1554 goto bail; 1555 } 1556 if (access ((char *) dir, W_OK) != 0) 1557 { 1558 if (verbose || FcDebug () & FC_DBG_CACHE) 1559 printf ("%s: not cleaning %s cache directory\n", dir, 1560 access ((char *) dir, F_OK) == 0 ? "unwritable" : "non-existent"); 1561 goto bail0; 1562 } 1563 if (verbose || FcDebug () & FC_DBG_CACHE) 1564 printf ("%s: cleaning cache directory\n", dir); 1565 d = opendir ((char *) dir); 1566 if (!d) 1567 { 1568 perror ((char *) dir); 1569 ret = FcFalse; 1570 goto bail0; 1571 } 1572 while ((ent = readdir (d))) 1573 { 1574 FcChar8 *file_name; 1575 const FcChar8 *target_dir; 1576 1577 if (ent->d_name[0] == '.') 1578 continue; 1579 /* skip cache files for different architectures and */ 1580 /* files which are not cache files at all */ 1581 if (strlen(ent->d_name) != 32 + strlen ("-" FC_ARCHITECTURE FC_CACHE_SUFFIX) || 1582 strcmp(ent->d_name + 32, "-" FC_ARCHITECTURE FC_CACHE_SUFFIX)) 1583 continue; 1584 1585 file_name = FcStrBuildFilename (dir, (FcChar8 *)ent->d_name, NULL); 1586 if (!file_name) 1587 { 1588 fprintf (stderr, "Fontconfig error: %s: allocation failure\n", dir); 1589 ret = FcFalse; 1590 break; 1591 } 1592 remove = FcFalse; 1593 cache = FcDirCacheLoadFile (file_name, NULL); 1594 if (!cache) 1595 { 1596 if (verbose || FcDebug () & FC_DBG_CACHE) 1597 printf ("%s: invalid cache file: %s\n", dir, ent->d_name); 1598 remove = FcTrue; 1599 } 1600 else 1601 { 1602 FcChar8 *s; 1603 1604 target_dir = FcCacheDir (cache); 1605 if (sysroot) 1606 s = FcStrBuildFilename (sysroot, target_dir, NULL); 1607 else 1608 s = FcStrdup (target_dir); 1609 if (stat ((char *) s, &target_stat) < 0) 1610 { 1611 if (verbose || FcDebug () & FC_DBG_CACHE) 1612 printf ("%s: %s: missing directory: %s \n", 1613 dir, ent->d_name, s); 1614 remove = FcTrue; 1615 } 1616 FcDirCacheUnload (cache); 1617 FcStrFree (s); 1618 } 1619 if (remove) 1620 { 1621 if (unlink ((char *) file_name) < 0) 1622 { 1623 perror ((char *) file_name); 1624 ret = FcFalse; 1625 } 1626 } 1627 FcStrFree (file_name); 1628 } 1629 1630 closedir (d); 1631 bail0: 1632 FcStrFree (dir); 1633 bail: 1634 FcConfigDestroy (config); 1635 1636 return ret; 1637 } 1638 1639 int 1640 FcDirCacheLock (const FcChar8 *dir, 1641 FcConfig *config) 1642 { 1643 FcChar8 *cache_hashed = NULL; 1644 FcChar8 cache_base[CACHEBASE_LEN]; 1645 FcStrList *list; 1646 FcChar8 *cache_dir; 1647 const FcChar8 *sysroot = FcConfigGetSysRoot (config); 1648 int fd = -1; 1649 1650 FcDirCacheBasenameMD5 (config, dir, cache_base); 1651 list = FcStrListCreate (config->cacheDirs); 1652 if (!list) 1653 return -1; 1654 1655 while ((cache_dir = FcStrListNext (list))) 1656 { 1657 if (sysroot) 1658 cache_hashed = FcStrBuildFilename (sysroot, cache_dir, cache_base, NULL); 1659 else 1660 cache_hashed = FcStrBuildFilename (cache_dir, cache_base, NULL); 1661 if (!cache_hashed) 1662 break; 1663 fd = FcOpen ((const char *)cache_hashed, O_RDWR); 1664 FcStrFree (cache_hashed); 1665 /* No caches in that directory. simply retry with another one */ 1666 if (fd != -1) 1667 { 1668 #if defined(_WIN32) 1669 if (_locking (fd, _LK_LOCK, 1) == -1) 1670 goto bail; 1671 #else 1672 struct flock fl; 1673 1674 fl.l_type = F_WRLCK; 1675 fl.l_whence = SEEK_SET; 1676 fl.l_start = 0; 1677 fl.l_len = 0; 1678 fl.l_pid = getpid (); 1679 if (fcntl (fd, F_SETLKW, &fl) == -1) 1680 goto bail; 1681 #endif 1682 break; 1683 } 1684 } 1685 FcStrListDone (list); 1686 return fd; 1687 bail: 1688 FcStrListDone (list); 1689 if (fd != -1) 1690 close (fd); 1691 return -1; 1692 } 1693 1694 void 1695 FcDirCacheUnlock (int fd) 1696 { 1697 if (fd != -1) 1698 { 1699 #if defined(_WIN32) 1700 _locking (fd, _LK_UNLCK, 1); 1701 #else 1702 struct flock fl; 1703 1704 fl.l_type = F_UNLCK; 1705 fl.l_whence = SEEK_SET; 1706 fl.l_start = 0; 1707 fl.l_len = 0; 1708 fl.l_pid = getpid (); 1709 fcntl (fd, F_SETLK, &fl); 1710 #endif 1711 close (fd); 1712 } 1713 } 1714 1715 /* 1716 * Hokey little macro trick to permit the definitions of C functions 1717 * with the same name as CPP macros 1718 */ 1719 #define args1(x) (x) 1720 #define args2(x,y) (x,y) 1721 1722 const FcChar8 * 1723 FcCacheDir args1(const FcCache *c) 1724 { 1725 return FcCacheDir (c); 1726 } 1727 1728 FcFontSet * 1729 FcCacheCopySet args1(const FcCache *c) 1730 { 1731 FcFontSet *old = FcCacheSet (c); 1732 FcFontSet *new = FcFontSetCreate (); 1733 int i; 1734 1735 if (!new) 1736 return NULL; 1737 for (i = 0; i < old->nfont; i++) 1738 { 1739 FcPattern *font = FcFontSetFont (old, i); 1740 1741 FcPatternReference (font); 1742 if (!FcFontSetAdd (new, font)) 1743 { 1744 FcFontSetDestroy (new); 1745 return NULL; 1746 } 1747 } 1748 return new; 1749 } 1750 1751 const FcChar8 * 1752 FcCacheSubdir args2(const FcCache *c, int i) 1753 { 1754 return FcCacheSubdir (c, i); 1755 } 1756 1757 int 1758 FcCacheNumSubdir args1(const FcCache *c) 1759 { 1760 return c->dirs_count; 1761 } 1762 1763 int 1764 FcCacheNumFont args1(const FcCache *c) 1765 { 1766 return FcCacheSet(c)->nfont; 1767 } 1768 1769 FcBool 1770 FcDirCacheCreateTagFile (const FcChar8 *cache_dir) 1771 { 1772 FcChar8 *cache_tag; 1773 int fd; 1774 FILE *fp; 1775 FcAtomic *atomic; 1776 static const FcChar8 cache_tag_contents[] = 1777 "Signature: 8a477f597d28d172789f06886806bc55\n" 1778 "# This file is a cache directory tag created by fontconfig.\n" 1779 "# For information about cache directory tags, see:\n" 1780 "# http://www.brynosaurus.com/cachedir/\n"; 1781 static size_t cache_tag_contents_size = sizeof (cache_tag_contents) - 1; 1782 FcBool ret = FcFalse; 1783 1784 if (!cache_dir) 1785 return FcFalse; 1786 1787 if (access ((char *) cache_dir, W_OK) == 0) 1788 { 1789 /* Create CACHEDIR.TAG */ 1790 cache_tag = FcStrBuildFilename (cache_dir, "CACHEDIR.TAG", NULL); 1791 if (!cache_tag) 1792 return FcFalse; 1793 atomic = FcAtomicCreate ((FcChar8 *)cache_tag); 1794 if (!atomic) 1795 goto bail1; 1796 if (!FcAtomicLock (atomic)) 1797 goto bail2; 1798 fd = FcOpen((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT, 0644); 1799 if (fd == -1) 1800 goto bail3; 1801 fp = fdopen(fd, "wb"); 1802 if (fp == NULL) 1803 goto bail3; 1804 1805 fwrite(cache_tag_contents, cache_tag_contents_size, sizeof (FcChar8), fp); 1806 fclose(fp); 1807 1808 if (!FcAtomicReplaceOrig(atomic)) 1809 goto bail3; 1810 1811 ret = FcTrue; 1812 bail3: 1813 FcAtomicUnlock (atomic); 1814 bail2: 1815 FcAtomicDestroy (atomic); 1816 bail1: 1817 FcStrFree (cache_tag); 1818 } 1819 1820 if (FcDebug () & FC_DBG_CACHE) 1821 { 1822 if (ret) 1823 printf ("Created CACHEDIR.TAG at %s\n", cache_dir); 1824 else 1825 printf ("Unable to create CACHEDIR.TAG at %s\n", cache_dir); 1826 } 1827 1828 return ret; 1829 } 1830 1831 void 1832 FcCacheCreateTagFile (FcConfig *config) 1833 { 1834 FcChar8 *cache_dir = NULL, *d = NULL; 1835 FcStrList *list; 1836 const FcChar8 *sysroot; 1837 1838 config = FcConfigReference (config); 1839 if (!config) 1840 return; 1841 sysroot = FcConfigGetSysRoot (config); 1842 1843 list = FcConfigGetCacheDirs (config); 1844 if (!list) 1845 goto bail; 1846 1847 while ((cache_dir = FcStrListNext (list))) 1848 { 1849 if (d) 1850 FcStrFree (d); 1851 if (sysroot) 1852 d = FcStrBuildFilename (sysroot, cache_dir, NULL); 1853 else 1854 d = FcStrCopyFilename (cache_dir); 1855 if (FcDirCacheCreateTagFile (d)) 1856 break; 1857 } 1858 if (d) 1859 FcStrFree (d); 1860 FcStrListDone (list); 1861 bail: 1862 FcConfigDestroy (config); 1863 } 1864 1865 #define __fccache__ 1866 #include "fcaliastail.h" 1867 #undef __fccache__ 1868
Indexes created Sun Jul 05 00:25:41 UTC 2026