fc-cache/fc-cache.c

   1 /*
   2  * fontconfig/fc-cache/fc-cache.c
   3  *
   4  * Copyright © 2002 Keith Packard
   5  *
   6  * Permission to use, copy, modify, distribute, and sell this software and its
   7  * documentation for any purpose is hereby granted without fee, provided that
   8  * the above copyright notice appear in all copies and that both that
   9  * copyright notice and this permission notice appear in supporting
  10  * documentation, and that the name of the author(s) not be used in
  11  * advertising or publicity pertaining to distribution of the software without
  12  * specific, written prior permission.  The authors make no
  13  * representations about the suitability of this software for any purpose.  It
  14  * is provided "as is" without express or implied warranty.
  15  *
  16  * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  17  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  18  * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  19  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  22  * PERFORMANCE OF THIS SOFTWARE.
  23  */
  24
  25 #include "../fc-arch/fcarch.h"
  26
  27 #ifdef HAVE_CONFIG_H
  28 #include <config.h>
  29 #else
  30 #ifdef linux
  31 #define HAVE_GETOPT_LONG 1
  32 #endif
  33 #define HAVE_GETOPT 1
  34 #endif
  35
  36 #include <fontconfig/fontconfig.h>
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #include <unistd.h>
  40 #include <sys/types.h>
  41 #include <sys/stat.h>
  42 #include <errno.h>
  43 #include <fcntl.h>
  44 #include <dirent.h>
  45 #include <string.h>
  46
  47 #if defined (_WIN32)
  48 #define STRICT
  49 #include <windows.h>
  50 #define sleep(x) Sleep((x) * 1000)
  51 #undef STRICT
  52 #endif
  53
  54 #ifndef O_BINARY
  55 #define O_BINARY 0
  56 #endif
  57
  58 #ifndef HAVE_GETOPT
  59 #define HAVE_GETOPT 0
  60 #endif
  61 #ifndef HAVE_GETOPT_LONG
  62 #define HAVE_GETOPT_LONG 0
  63 #endif
  64
  65 #if HAVE_GETOPT_LONG
  66 #undef  _GNU_SOURCE
  67 #define _GNU_SOURCE
  68 #include <getopt.h>
  69 const struct option longopts[] = {
  70     {"force", 0, 0, 'f'},
  71     {"really-force", 0, 0, 'r'},
  72     {"system-only", 0, 0, 's'},
  73     {"version", 0, 0, 'V'},
  74     {"verbose", 0, 0, 'v'},
  75     {"help", 0, 0, 'h'},
  76     {NULL,0,0,0},
  77 };
  78 #else
  79 #if HAVE_GETOPT
  80 extern char *optarg;
  81 extern int optind, opterr, optopt;
  82 #endif
  83 #endif
  84
  85 static void
  86 usage (char *program, int error)
  87 {
  88     FILE *file = error ? stderr : stdout;
  89 #if HAVE_GETOPT_LONG
  90     fprintf (file, "usage: %s [-frsvVh] [--force|--really-force] [--system-only] [--verbose] [--version] [--help] [dirs]\n",
  91              program);
  92 #else
  93     fprintf (file, "usage: %s [-frsvVh] [dirs]\n",
  94              program);
  95 #endif
  96     fprintf (file, "Build font information caches in [dirs]\n"
  97              "(all directories in font configuration by default).\n");
  98     fprintf (file, "\n");
  99 #if HAVE_GETOPT_LONG
 100     fprintf (file, "  -f, --force          scan directories with apparently valid caches\n");
 101     fprintf (file, "  -r, --really-force   erase all existing caches, then rescan\n");
 102     fprintf (file, "  -s, --system-only    scan system-wide directories only\n");
 103     fprintf (file, "  -v, --verbose        display status information while busy\n");
 104     fprintf (file, "  -V, --version        display font config version and exit\n");
 105     fprintf (file, "  -h, --help           display this help and exit\n");
 106 #else
 107     fprintf (file, "  -f         (force)   scan directories with apparently valid caches\n");
 108     fprintf (file, "  -r,   (really force) erase all existing caches, then rescan\n");
 109     fprintf (file, "  -s         (system)  scan system-wide directories only\n");
 110     fprintf (file, "  -v         (verbose) display status information while busy\n");
 111     fprintf (file, "  -V         (version) display font config version and exit\n");
 112     fprintf (file, "  -h         (help)    display this help and exit\n");
 113 #endif
 114     exit (error);
 115 }
 116
 117 static FcStrSet *processed_dirs;
 118
 119 static int
 120 scanDirs (FcStrList *list, FcConfig *config, FcBool force, FcBool really_force, FcBool verbose, int *changed)
 121 {
 122     int             ret = 0;
 123     const FcChar8   *dir;
 124     FcStrSet        *subdirs;
 125     FcStrList       *sublist;
 126     FcCache         *cache;
 127     struct stat     statb;
 128     FcBool          was_valid;
 129     int             i;
 130
 131     /*
 132      * Now scan all of the directories into separate databases
 133      * and write out the results
 134      */
 135     while ((dir = FcStrListNext (list)))
 136     {
 137         if (verbose)
 138         {
 139             printf ("%s: ", dir);
 140             fflush (stdout);
 141         }
 142
 143         if (!dir)
 144         {
 145             if (verbose)
 146                 printf ("skipping, no such directory\n");
 147             continue;
 148         }
 149
 150         if (FcStrSetMember (processed_dirs, dir))
 151         {
 152             if (verbose)
 153                 printf ("skipping, looped directory detected\n");
 154             continue;
 155         }
 156
 157         if (stat ((char *) dir, &statb) == -1)
 158         {
 159             switch (errno) {
 160             case ENOENT:
 161             case ENOTDIR:
 162                 if (verbose)
 163                     printf ("skipping, no such directory\n");
 164                 break;
 165             default:
 166                 fprintf (stderr, "\"%s\": ", dir);
 167                 perror ("");
 168                 ret++;
 169                 break;
 170             }
 171             continue;
 172         }
 173
 174         if (!S_ISDIR (statb.st_mode))
 175         {
 176             fprintf (stderr, "\"%s\": not a directory, skipping\n", dir);
 177             continue;
 178         }
 179
 180         if (really_force)
 181             FcDirCacheUnlink (dir, config);
 182
 183         cache = NULL;
 184         was_valid = FcFalse;
 185         if (!force) {
 186             cache = FcDirCacheLoad (dir, config, NULL);
 187             if (cache)
 188                 was_valid = FcTrue;
 189         }
 190
 191         if (!cache)
 192         {
 193             (*changed)++;
 194             cache = FcDirCacheRead (dir, FcTrue, config);
 195             if (!cache)
 196             {
 197                 fprintf (stderr, "%s: error scanning\n", dir);
 198                 ret++;
 199                 continue;
 200             }
 201         }
 202
 203         if (was_valid)
 204         {
 205             if (verbose)
 206                 printf ("skipping, existing cache is valid: %d fonts, %d dirs\n",
 207                         FcCacheNumFont (cache), FcCacheNumSubdir (cache));
 208         }
 209         else
 210         {
 211             if (verbose)
 212                 printf ("caching, new cache contents: %d fonts, %d dirs\n",
 213                         FcCacheNumFont (cache), FcCacheNumSubdir (cache));
 214
 215             if (!FcDirCacheValid (dir))
 216             {
 217                 fprintf (stderr, "%s: failed to write cache\n", dir);
 218                 (void) FcDirCacheUnlink (dir, config);
 219                 ret++;
 220             }
 221         }
 222
 223         subdirs = FcStrSetCreate ();
 224         if (!subdirs)
 225         {
 226             fprintf (stderr, "%s: Can't create subdir set\n", dir);
 227             ret++;
 228             FcDirCacheUnload (cache);
 229             continue;
 230         }
 231         for (i = 0; i < FcCacheNumSubdir (cache); i++)
 232             FcStrSetAdd (subdirs, FcCacheSubdir (cache, i));
 233
 234         FcDirCacheUnload (cache);
 235
 236         sublist = FcStrListCreate (subdirs);
 237         FcStrSetDestroy (subdirs);
 238         if (!sublist)
 239         {
 240             fprintf (stderr, "%s: Can't create subdir list\n", dir);
 241             ret++;
 242             continue;
 243         }
 244         FcStrSetAdd (processed_dirs, dir);
 245         ret += scanDirs (sublist, config, force, really_force, verbose, changed);
 246     }
 247     FcStrListDone (list);
 248     return ret;
 249 }
 250
 251 static FcBool
 252 cleanCacheDirectory (FcConfig *config, FcChar8 *dir, FcBool verbose)
 253 {
 254     DIR         *d;
 255     struct dirent *ent;
 256     FcChar8     *dir_base;
 257     FcBool      ret = FcTrue;
 258     FcBool      remove;
 259     FcCache     *cache;
 260     struct stat target_stat;
 261
 262     dir_base = FcStrPlus (dir, (FcChar8 *) "/");
 263     if (!dir_base)
 264     {
 265         fprintf (stderr, "%s: out of memory\n", dir);
 266         return FcFalse;
 267     }
 268     if (access ((char *) dir, W_OK) != 0)
 269     {
 270         if (verbose)
 271             printf ("%s: not cleaning %s cache directory\n", dir,
 272                     access ((char *) dir, F_OK) == 0 ? "unwritable" : "non-existent");
 273         FcStrFree (dir_base);
 274         return FcTrue;
 275     }
 276     if (verbose)
 277         printf ("%s: cleaning cache directory\n", dir);
 278     d = opendir ((char *) dir);
 279     if (!d)
 280     {
 281         perror ((char *) dir);
 282         FcStrFree (dir_base);
 283         return FcFalse;
 284     }
 285     while ((ent = readdir (d)))
 286     {
 287         FcChar8 *file_name;
 288         const FcChar8   *target_dir;
 289
 290         if (ent->d_name[0] == '.')
 291             continue;
 292         /* skip cache files for different architectures and */
 293         /* files which are not cache files at all */
 294         if (strlen(ent->d_name) != 32 + strlen ("-" FC_ARCHITECTURE FC_CACHE_SUFFIX) ||
 295             strcmp(ent->d_name + 32, "-" FC_ARCHITECTURE FC_CACHE_SUFFIX))
 296             continue;
 297
 298         file_name = FcStrPlus (dir_base, (FcChar8 *) ent->d_name);
 299         if (!file_name)
 300         {
 301             fprintf (stderr, "%s: allocation failure\n", dir);
 302             ret = FcFalse;
 303             break;
 304         }
 305         remove = FcFalse;
 306         cache = FcDirCacheLoadFile (file_name, NULL);
 307         if (!cache)
 308         {
 309             if (verbose)
 310                 printf ("%s: invalid cache file: %s\n", dir, ent->d_name);
 311             remove = FcTrue;
 312         }
 313         else
 314         {
 315             target_dir = FcCacheDir (cache);
 316             if (stat ((char *) target_dir, &target_stat) < 0)
 317             {
 318                 if (verbose)
 319                     printf ("%s: %s: missing directory: %s \n",
 320                             dir, ent->d_name, target_dir);
 321                 remove = FcTrue;
 322             }
 323         }
 324         if (remove)
 325         {
 326             if (unlink ((char *) file_name) < 0)
 327             {
 328                 perror ((char *) file_name);
 329                 ret = FcFalse;
 330             }
 331         }
 332         FcDirCacheUnload (cache);
 333         FcStrFree (file_name);
 334     }
 335
 336     closedir (d);
 337     FcStrFree (dir_base);
 338     return ret;
 339 }
 340
 341 static FcBool
 342 cleanCacheDirectories (FcConfig *config, FcBool verbose)
 343 {
 344     FcStrList   *cache_dirs = FcConfigGetCacheDirs (config);
 345     FcChar8     *cache_dir;
 346     FcBool      ret = FcTrue;
 347
 348     if (!cache_dirs)
 349         return FcFalse;
 350     while ((cache_dir = FcStrListNext (cache_dirs)))
 351     {
 352         if (!cleanCacheDirectory (config, cache_dir, verbose))
 353         {
 354             ret = FcFalse;
 355             break;
 356         }
 357     }
 358     FcStrListDone (cache_dirs);
 359     return ret;
 360 }
 361
 362 int
 363 main (int argc, char **argv)
 364 {
 365     FcStrSet    *dirs;
 366     FcStrList   *list;
 367     FcBool      verbose = FcFalse;
 368     FcBool      force = FcFalse;
 369     FcBool      really_force = FcFalse;
 370     FcBool      systemOnly = FcFalse;
 371     FcConfig    *config;
 372     int         i;
 373     int         changed;
 374     int         ret;
 375 #if HAVE_GETOPT_LONG || HAVE_GETOPT
 376     int         c;
 377
 378 #if HAVE_GETOPT_LONG
 379     while ((c = getopt_long (argc, argv, "frsVvh", longopts, NULL)) != -1)
 380 #else
 381     while ((c = getopt (argc, argv, "frsVvh")) != -1)
 382 #endif
 383     {
 384         switch (c) {
 385         case 'r':
 386             really_force = FcTrue;
 387             /* fall through */
 388         case 'f':
 389             force = FcTrue;
 390             break;
 391         case 's':
 392             systemOnly = FcTrue;
 393             break;
 394         case 'V':
 395             fprintf (stderr, "fontconfig version %d.%d.%d\n",
 396                      FC_MAJOR, FC_MINOR, FC_REVISION);
 397             exit (0);
 398         case 'v':
 399             verbose = FcTrue;
 400             break;
 401         case 'h':
 402             usage (argv[0], 0);
 403         default:
 404             usage (argv[0], 1);
 405         }
 406     }
 407     i = optind;
 408 #else
 409     i = 1;
 410 #endif
 411
 412     if (systemOnly)
 413         FcConfigEnableHome (FcFalse);
 414     config = FcInitLoadConfig ();
 415     if (!config)
 416     {
 417         fprintf (stderr, "%s: Can't init font config library\n", argv[0]);
 418         return 1;
 419     }
 420     FcConfigSetCurrent (config);
 421
 422     if (argv[i])
 423     {
 424         dirs = FcStrSetCreate ();
 425         if (!dirs)
 426         {
 427             fprintf (stderr, "%s: Can't create list of directories\n",
 428                      argv[0]);
 429             return 1;
 430         }
 431         while (argv[i])
 432         {
 433             if (!FcStrSetAddFilename (dirs, (FcChar8 *) argv[i]))
 434             {
 435                 fprintf (stderr, "%s: Can't add directory\n", argv[0]);
 436                 return 1;
 437             }
 438             i++;
 439         }
 440         list = FcStrListCreate (dirs);
 441         FcStrSetDestroy (dirs);
 442     }
 443     else
 444         list = FcConfigGetConfigDirs (config);
 445
 446     if ((processed_dirs = FcStrSetCreate()) == NULL) {
 447         fprintf(stderr, "Cannot malloc\n");
 448         return 1;
 449     }
 450
 451     changed = 0;
 452     ret = scanDirs (list, config, force, really_force, verbose, &changed);
 453
 454     FcStrSetDestroy (processed_dirs);
 455
 456     cleanCacheDirectories (config, verbose);
 457
 458     /*
 459      * Now we need to sleep a second  (or two, to be extra sure), to make
 460      * sure that timestamps for changes after this run of fc-cache are later
 461      * then any timestamps we wrote.  We don't use gettimeofday() because
 462      * sleep(3) can't be interrupted by a signal here -- this isn't in the
 463      * library, and there aren't any signals flying around here.
 464      */
 465     FcConfigDestroy (config);
 466     FcFini ();
 467     if (changed)
 468         sleep (2);
 469     if (verbose)
 470         printf ("%s: %s\n", argv[0], ret ? "failed" : "succeeded");
 471     return ret;
 472 }