fc-cache/fc-cache.c

   1 /*
   2  * $RCSId: xc/lib/fontconfig/fc-cache/fc-cache.c,v 1.8tsi Exp $
   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 Keith Packard not be used in
  11  * advertising or publicity pertaining to distribution of the software without
  12  * specific, written prior permission.  Keith Packard makes 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  * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  17  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  18  * EVENT SHALL KEITH PACKARD 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 #ifdef HAVE_CONFIG_H
  26 #include <config.h>
  27 #else
  28 #ifdef linux
  29 #define HAVE_GETOPT_LONG 1
  30 #endif
  31 #define HAVE_GETOPT 1
  32 #endif
  33
  34 #include "fcint.h"
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <unistd.h>
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40 #include <errno.h>
  41 #include <fcntl.h>
  42 #include <dirent.h>
  43
  44 #if defined (_WIN32)
  45 #define STRICT
  46 #include <windows.h>
  47 #define sleep(x) Sleep((x) * 1000)
  48 #undef STRICT
  49 #endif
  50
  51 #ifndef O_BINARY
  52 #define O_BINARY 0
  53 #endif
  54
  55 #ifndef HAVE_GETOPT
  56 #define HAVE_GETOPT 0
  57 #endif
  58 #ifndef HAVE_GETOPT_LONG
  59 #define HAVE_GETOPT_LONG 0
  60 #endif
  61
  62 #if HAVE_GETOPT_LONG
  63 #undef  _GNU_SOURCE
  64 #define _GNU_SOURCE
  65 #include <getopt.h>
  66 const struct option longopts[] = {
  67     {"force", 0, 0, 'f'},
  68     {"really-force", 0, 0, 'r'},
  69     {"system-only", 0, 0, 's'},
  70     {"version", 0, 0, 'V'},
  71     {"verbose", 0, 0, 'v'},
  72     {"help", 0, 0, '?'},
  73     {NULL,0,0,0},
  74 };
  75 #else
  76 #if HAVE_GETOPT
  77 extern char *optarg;
  78 extern int optind, opterr, optopt;
  79 #endif
  80 #endif
  81
  82 static void
  83 usage (char *program)
  84 {
  85 #if HAVE_GETOPT_LONG
  86     fprintf (stderr, "usage: %s [-frsvV?] [--force|--really-force] [--system-only] [--verbose] [--version] [--help] [dirs]\n",
  87              program);
  88 #else
  89     fprintf (stderr, "usage: %s [-frsvV?] [dirs]\n",
  90              program);
  91 #endif
  92     fprintf (stderr, "Build font information caches in [dirs]\n"
  93              "(all directories in font configuration by default).\n");
  94     fprintf (stderr, "\n");
  95 #if HAVE_GETOPT_LONG
  96     fprintf (stderr, "  -f, --force          scan directories with apparently valid caches\n");
  97     fprintf (stderr, "  -r, --really-force   erase all existing caches, then rescan\n");
  98     fprintf (stderr, "  -s, --system-only    scan system-wide directories only\n");
  99     fprintf (stderr, "  -v, --verbose        display status information while busy\n");
 100     fprintf (stderr, "  -V, --version        display font config version and exit\n");
 101     fprintf (stderr, "  -?, --help           display this help and exit\n");
 102 #else
 103     fprintf (stderr, "  -f         (force)   scan directories with apparently valid caches\n");
 104     fprintf (stderr, "  -r,   (really force) erase all existing caches, then rescan\n");
 105     fprintf (stderr, "  -s         (system)  scan system-wide directories only\n");
 106     fprintf (stderr, "  -v         (verbose) display status information while busy\n");
 107     fprintf (stderr, "  -V         (version) display font config version and exit\n");
 108     fprintf (stderr, "  -?         (help)    display this help and exit\n");
 109 #endif
 110     exit (1);
 111 }
 112
 113 static FcStrSet *processed_dirs;
 114
 115 static int
 116 nsubdirs (FcStrSet *set)
 117 {
 118     FcStrList   *list;
 119     int         n = 0;
 120
 121     list = FcStrListCreate (set);
 122     if (!list)
 123         return 0;
 124     while (FcStrListNext (list))
 125         n++;
 126     FcStrListDone (list);
 127     return n;
 128 }
 129
 130 static int
 131 scanDirs (FcStrList *list, FcConfig *config, FcBool force, FcBool really_force, FcBool verbose)
 132 {
 133     int         ret = 0;
 134     const FcChar8 *dir;
 135     FcFontSet   *set;
 136     FcStrSet    *subdirs;
 137     FcStrList   *sublist;
 138     FcCache     *cache;
 139     struct stat statb;
 140     FcBool      was_valid;
 141     int         i;
 142
 143     /*
 144      * Now scan all of the directories into separate databases
 145      * and write out the results
 146      */
 147     while ((dir = FcStrListNext (list)))
 148     {
 149         if (verbose)
 150         {
 151             printf ("%s: ", dir);
 152             fflush (stdout);
 153         }
 154
 155         if (!dir)
 156         {
 157             if (verbose)
 158                 printf ("skipping, no such directory\n");
 159             continue;
 160         }
 161
 162         if (FcStrSetMember (processed_dirs, dir))
 163         {
 164             if (verbose)
 165                 printf ("skipping, looped directory detected\n");
 166             continue;
 167         }
 168
 169         if (access ((char *) dir, W_OK) < 0)
 170         {
 171             switch (errno) {
 172             case ENOENT:
 173             case ENOTDIR:
 174                 if (verbose)
 175                     printf ("skipping, no such directory\n");
 176                 continue;
 177             case EACCES:
 178             case EROFS:
 179                 /* That's ok, caches go to /var anyway. */
 180                 /* Ideally we'd do an access on the hashed_name. */
 181                 /* But we hid that behind an abstraction barrier. */
 182                 break;
 183             default:
 184                 fprintf (stderr, "\"%s\": ", dir);
 185                 perror ("");
 186                 ret++;
 187
 188                 continue;
 189             }
 190         }
 191         if (stat ((char *) dir, &statb) == -1)
 192         {
 193             fprintf (stderr, "\"%s\": ", dir);
 194             perror ("");
 195             ret++;
 196             continue;
 197         }
 198         if (!S_ISDIR (statb.st_mode))
 199         {
 200             fprintf (stderr, "\"%s\": not a directory, skipping\n", dir);
 201             continue;
 202         }
 203
 204         if (really_force)
 205             FcDirCacheUnlink (dir, config);
 206
 207         cache = NULL;
 208         was_valid = FcFalse;
 209         if (!force) {
 210             cache = FcDirCacheLoad (dir, config, NULL);
 211             if (cache)
 212                 was_valid = FcTrue;
 213         }
 214
 215         if (!cache)
 216         {
 217             cache = FcDirCacheRead (dir, FcTrue, config);
 218             if (!cache)
 219             {
 220                 fprintf (stderr, "%s: error scanning\n", dir);
 221                 ret++;
 222                 continue;
 223             }
 224         }
 225
 226         set = FcCacheSet (cache);
 227
 228         if (was_valid)
 229         {
 230             if (verbose)
 231                 printf ("skipping, %d fonts, %d dirs\n",
 232                         set->nfont, cache->dirs_count);
 233         }
 234         else
 235         {
 236             if (verbose)
 237                 printf ("caching, %d fonts, %d dirs\n",
 238                         set->nfont, cache->dirs_count);
 239
 240             if (!FcDirCacheValid (dir))
 241             {
 242                 fprintf (stderr, "%s: failed to write cache\n", dir);
 243                 (void) FcDirCacheUnlink (dir, config);
 244                 ret++;
 245             }
 246         }
 247
 248         subdirs = FcStrSetCreate ();
 249         if (!subdirs)
 250         {
 251             fprintf (stderr, "%s: Can't create subdir set\n", dir);
 252             ret++;
 253             FcDirCacheUnload (cache);
 254             continue;
 255         }
 256         for (i = 0; i < cache->dirs_count; i++)
 257             FcStrSetAdd (subdirs, FcCacheSubdir (cache, i));
 258
 259         FcDirCacheUnload (cache);
 260
 261         sublist = FcStrListCreate (subdirs);
 262         FcStrSetDestroy (subdirs);
 263         if (!sublist)
 264         {
 265             fprintf (stderr, "%s: Can't create subdir list\n", dir);
 266             ret++;
 267             FcDirCacheUnload (cache);
 268             continue;
 269         }
 270         FcStrSetAdd (processed_dirs, dir);
 271         ret += scanDirs (sublist, config, force, really_force, verbose);
 272     }
 273     FcStrListDone (list);
 274     return ret;
 275 }
 276
 277 static FcBool
 278 cleanCacheDirectory (FcConfig *config, FcChar8 *dir, FcBool verbose)
 279 {
 280     DIR         *d;
 281     struct dirent *ent;
 282     char        *dir_base;
 283     FcBool      ret = FcTrue;
 284     FcBool      remove;
 285     FcCache     *cache;
 286     struct stat file_stat;
 287     struct stat target_stat;
 288
 289     dir_base = FcStrPlus (dir, "/");
 290     if (access ((char *) dir, W_OK|X_OK) != 0)
 291     {
 292         if (verbose)
 293             printf ("%s: not cleaning unwritable cache directory\n", dir);
 294         return FcTrue;
 295     }
 296     if (verbose)
 297         printf ("%s: cleaning cache directory\n", dir);
 298     d = opendir (dir);
 299     if (!d)
 300     {
 301         perror (dir);
 302         return FcFalse;
 303     }
 304     while ((ent = readdir (d)))
 305     {
 306         FcChar8 *file_name;
 307         FcChar8 *target_dir;
 308
 309         if (ent->d_name[0] == '.')
 310             continue;
 311         file_name = FcStrPlus (dir_base, ent->d_name);
 312         if (!file_name)
 313         {
 314             fprintf (stderr, "%s: allocation failure\n", dir);
 315             ret = FcFalse;
 316             break;
 317         }
 318         cache = FcDirCacheLoadFile (file_name, &file_stat);
 319         if (!cache)
 320         {
 321             fprintf (stderr, "%s: invalid cache file: %s\n", dir, ent->d_name);
 322             FcStrFree (file_name);
 323             ret = FcFalse;
 324             continue;
 325         }
 326         target_dir = FcCacheDir (cache);
 327         remove = FcFalse;
 328         if (stat (target_dir, &target_stat) < 0)
 329         {
 330             if (verbose)
 331                 printf ("%s: %s: missing directory: %s \n",
 332                         dir, ent->d_name, target_dir);
 333             remove = FcTrue;
 334         }
 335         else if (target_stat.st_mtime > file_stat.st_mtime)
 336         {
 337             if (verbose)
 338                 printf ("%s: %s: cache outdated: %s\n",
 339                         dir, ent->d_name, target_dir);
 340             remove = FcTrue;
 341         }
 342         if (remove)
 343         {
 344             if (unlink (file_name) < 0)
 345             {
 346                 perror (file_name);
 347                 ret = FcFalse;
 348             }
 349         }
 350         FcStrFree (file_name);
 351     }
 352
 353     closedir (d);
 354     return ret;
 355 }
 356
 357 static FcBool
 358 cleanCacheDirectories (FcConfig *config, FcBool verbose)
 359 {
 360     FcStrList   *cache_dirs = FcConfigGetCacheDirs (config);
 361     FcChar8     *cache_dir;
 362     FcBool      ret = FcTrue;
 363
 364     if (!cache_dirs)
 365         return FcFalse;
 366     while ((cache_dir = FcStrListNext (cache_dirs)))
 367     {
 368         if (!cleanCacheDirectory (config, cache_dir, verbose))
 369         {
 370             ret = FcFalse;
 371             break;
 372         }
 373     }
 374     FcStrListDone (cache_dirs);
 375     return ret;
 376 }
 377
 378 int
 379 main (int argc, char **argv)
 380 {
 381     FcStrSet    *dirs;
 382     FcStrList   *list;
 383     FcBool      verbose = FcFalse;
 384     FcBool      force = FcFalse;
 385     FcBool      really_force = FcFalse;
 386     FcBool      systemOnly = FcFalse;
 387     FcConfig    *config;
 388     int         i;
 389     int         ret;
 390 #if HAVE_GETOPT_LONG || HAVE_GETOPT
 391     int         c;
 392
 393 #if HAVE_GETOPT_LONG
 394     while ((c = getopt_long (argc, argv, "frsVv?", longopts, NULL)) != -1)
 395 #else
 396     while ((c = getopt (argc, argv, "frsVv?")) != -1)
 397 #endif
 398     {
 399         switch (c) {
 400         case 'r':
 401             really_force = FcTrue;
 402             /* fall through */
 403         case 'f':
 404             force = FcTrue;
 405             break;
 406         case 's':
 407             systemOnly = FcTrue;
 408             break;
 409         case 'V':
 410             fprintf (stderr, "fontconfig version %d.%d.%d\n",
 411                      FC_MAJOR, FC_MINOR, FC_REVISION);
 412             exit (0);
 413         case 'v':
 414             verbose = FcTrue;
 415             break;
 416         default:
 417             usage (argv[0]);
 418         }
 419     }
 420     i = optind;
 421 #else
 422     i = 1;
 423 #endif
 424
 425     if (systemOnly)
 426         FcConfigEnableHome (FcFalse);
 427     config = FcInitLoadConfig ();
 428     if (!config)
 429     {
 430         fprintf (stderr, "%s: Can't init font config library\n", argv[0]);
 431         return 1;
 432     }
 433     FcConfigSetCurrent (config);
 434
 435     if (argv[i])
 436     {
 437         dirs = FcStrSetCreate ();
 438         if (!dirs)
 439         {
 440             fprintf (stderr, "%s: Can't create list of directories\n",
 441                      argv[0]);
 442             return 1;
 443         }
 444         while (argv[i])
 445         {
 446             if (!FcStrSetAdd (dirs, (FcChar8 *) argv[i]))
 447             {
 448                 fprintf (stderr, "%s: Can't add directory\n", argv[0]);
 449                 return 1;
 450             }
 451             i++;
 452         }
 453         list = FcStrListCreate (dirs);
 454         FcStrSetDestroy (dirs);
 455     }
 456     else
 457         list = FcConfigGetConfigDirs (config);
 458
 459     if ((processed_dirs = FcStrSetCreate()) == NULL) {
 460         fprintf(stderr, "Cannot malloc\n");
 461         return 1;
 462     }
 463
 464     ret = scanDirs (list, config, force, really_force, verbose);
 465
 466     FcStrSetDestroy (processed_dirs);
 467
 468     cleanCacheDirectories (config, verbose);
 469
 470     /*
 471      * Now we need to sleep a second  (or two, to be extra sure), to make
 472      * sure that timestamps for changes after this run of fc-cache are later
 473      * then any timestamps we wrote.  We don't use gettimeofday() because
 474      * sleep(3) can't be interrupted by a signal here -- this isn't in the
 475      * library, and there aren't any signals flying around here.
 476      */
 477     FcConfigDestroy (config);
 478     sleep (2);
 479     if (verbose)
 480         printf ("%s: %s\n", argv[0], ret ? "failed" : "succeeded");
 481     return ret;
 482 }