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fontconfig/fc-cache/fc-cache.c

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/*
* fontconfig/fc-cache/fc-cache.c
*
* Copyright © 2002 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the author(s) not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. The authors make no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#else
#ifdef linux
#define HAVE_GETOPT_LONG 1
#endif
#define HAVE_GETOPT 1
#endif
#include <fontconfig/fontconfig.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <dirent.h>
#include <string.h>
#ifndef FC_DIR_SEPARATOR_S
# ifdef _WIN32
# define FC_DIR_SEPARATOR_S "\\"
# else
# define FC_DIR_SEPARATOR_S "/"
# endif
#endif
#if defined (_WIN32)
#define STRICT
#include <windows.h>
#define sleep(x) Sleep((x) * 1000)
#undef STRICT
#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
#ifndef HAVE_GETOPT
#define HAVE_GETOPT 0
#endif
#ifndef HAVE_GETOPT_LONG
#define HAVE_GETOPT_LONG 0
#endif
#if HAVE_GETOPT_LONG
#undef _GNU_SOURCE
#define _GNU_SOURCE
#include <getopt.h>
const struct option longopts[] = {
{"force", 0, 0, 'f'},
{"really-force", 0, 0, 'r'},
{"system-only", 0, 0, 's'},
{"version", 0, 0, 'V'},
{"verbose", 0, 0, 'v'},
{"help", 0, 0, 'h'},
{NULL,0,0,0},
};
#else
#if HAVE_GETOPT
extern char *optarg;
extern int optind, opterr, optopt;
#endif
#endif
static void
usage (char *program, int error)
{
FILE *file = error ? stderr : stdout;
#if HAVE_GETOPT_LONG
fprintf (file, "usage: %s [-frsvVh] [--force|--really-force] [--system-only] [--verbose] [--version] [--help] [dirs]\n",
program);
#else
fprintf (file, "usage: %s [-frsvVh] [dirs]\n",
program);
#endif
fprintf (file, "Build font information caches in [dirs]\n"
"(all directories in font configuration by default).\n");
fprintf (file, "\n");
#if HAVE_GETOPT_LONG
fprintf (file, " -f, --force scan directories with apparently valid caches\n");
fprintf (file, " -r, --really-force erase all existing caches, then rescan\n");
fprintf (file, " -s, --system-only scan system-wide directories only\n");
fprintf (file, " -v, --verbose display status information while busy\n");
fprintf (file, " -V, --version display font config version and exit\n");
fprintf (file, " -h, --help display this help and exit\n");
#else
fprintf (file, " -f (force) scan directories with apparently valid caches\n");
fprintf (file, " -r, (really force) erase all existing caches, then rescan\n");
fprintf (file, " -s (system) scan system-wide directories only\n");
fprintf (file, " -v (verbose) display status information while busy\n");
fprintf (file, " -V (version) display font config version and exit\n");
fprintf (file, " -h (help) display this help and exit\n");
#endif
exit (error);
}
static FcStrSet *processed_dirs;
/* Create CACHEDIR.TAG */
static FcBool
create_tag_file (FcConfig *config, FcBool verbose)
{
FcChar8 *cache_tag;
FcChar8 *cache_dir = NULL;
FcStrList *list;
int fd;
FILE *fp;
FcAtomic *atomic;
static const FcChar8 cache_tag_contents[] =
"Signature: 8a477f597d28d172789f06886806bc55\n"
"# This file is a cache directory tag created by fontconfig.\n"
"# For information about cache directory tags, see:\n"
"# http://www.brynosaurus.com/cachedir/\n";
static size_t cache_tag_contents_size = sizeof (cache_tag_contents) - 1;
FcBool ret = FcTrue;
list = FcConfigGetCacheDirs(config);
if (!list)
return FcFalse;
while ((cache_dir = FcStrListNext (list)))
{
if (access ((char *) cache_dir, W_OK|X_OK) == 0)
{
if (verbose)
printf ("Create CACHEDIR.TAG at %s\n", cache_dir);
/* Create CACHEDIR.TAG */
cache_tag = FcStrPlus (cache_dir, (const FcChar8 *) FC_DIR_SEPARATOR_S "CACHEDIR.TAG");
if (!cache_tag)
return FcFalse;
atomic = FcAtomicCreate ((FcChar8 *)cache_tag);
if (!atomic)
goto bail1;
if (!FcAtomicLock (atomic))
goto bail2;
fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT, 0644);
if (fd == -1)
goto bail3;
fp = fdopen(fd, "wb");
if (fp == NULL)
goto bail3;
fwrite(cache_tag_contents, cache_tag_contents_size, sizeof (FcChar8), fp);
fclose(fp);
if (!FcAtomicReplaceOrig(atomic))
goto bail3;
bail3:
FcAtomicUnlock (atomic);
bail2:
FcAtomicDestroy (atomic);
bail1:
FcStrFree (cache_tag);
}
}
FcStrListDone (list);
return ret;
}
static int
scanDirs (FcStrList *list, FcConfig *config, FcBool force, FcBool really_force, FcBool verbose, int *changed)
{
int ret = 0;
const FcChar8 *dir;
FcStrSet *subdirs;
FcStrList *sublist;
FcCache *cache;
struct stat statb;
FcBool was_valid;
int i;
/*
* Now scan all of the directories into separate databases
* and write out the results
*/
while ((dir = FcStrListNext (list)))
{
if (verbose)
{
printf ("%s: ", dir);
fflush (stdout);
}
if (!dir)
{
if (verbose)
printf ("skipping, no such directory\n");
continue;
}
if (FcStrSetMember (processed_dirs, dir))
{
if (verbose)
printf ("skipping, looped directory detected\n");
continue;
}
if (stat ((char *) dir, &statb) == -1)
{
switch (errno) {
case ENOENT:
case ENOTDIR:
if (verbose)
printf ("skipping, no such directory\n");
break;
default:
fprintf (stderr, "\"%s\": ", dir);
perror ("");
ret++;
break;
}
continue;
}
if (!S_ISDIR (statb.st_mode))
{
fprintf (stderr, "\"%s\": not a directory, skipping\n", dir);
continue;
}
if (really_force)
FcDirCacheUnlink (dir, config);
cache = NULL;
was_valid = FcFalse;
if (!force) {
cache = FcDirCacheLoad (dir, config, NULL);
if (cache)
was_valid = FcTrue;
}
if (!cache)
{
(*changed)++;
cache = FcDirCacheRead (dir, FcTrue, config);
if (!cache)
{
fprintf (stderr, "%s: error scanning\n", dir);
ret++;
continue;
}
}
if (was_valid)
{
if (verbose)
printf ("skipping, existing cache is valid: %d fonts, %d dirs\n",
FcCacheNumFont (cache), FcCacheNumSubdir (cache));
}
else
{
if (verbose)
printf ("caching, new cache contents: %d fonts, %d dirs\n",
FcCacheNumFont (cache), FcCacheNumSubdir (cache));
if (!FcDirCacheValid (dir))
{
fprintf (stderr, "%s: failed to write cache\n", dir);
(void) FcDirCacheUnlink (dir, config);
ret++;
}
}
subdirs = FcStrSetCreate ();
if (!subdirs)
{
fprintf (stderr, "%s: Can't create subdir set\n", dir);
ret++;
FcDirCacheUnload (cache);
continue;
}
for (i = 0; i < FcCacheNumSubdir (cache); i++)
FcStrSetAdd (subdirs, FcCacheSubdir (cache, i));
FcDirCacheUnload (cache);
sublist = FcStrListCreate (subdirs);
FcStrSetDestroy (subdirs);
if (!sublist)
{
fprintf (stderr, "%s: Can't create subdir list\n", dir);
ret++;
continue;
}
FcStrSetAdd (processed_dirs, dir);
ret += scanDirs (sublist, config, force, really_force, verbose, changed);
}
FcStrListDone (list);
return ret;
}
static FcBool
cleanCacheDirectories (FcConfig *config, FcBool verbose)
{
FcStrList *cache_dirs = FcConfigGetCacheDirs (config);
FcChar8 *cache_dir;
FcBool ret = FcTrue;
if (!cache_dirs)
return FcFalse;
while ((cache_dir = FcStrListNext (cache_dirs)))
{
if (!FcDirCacheClean (cache_dir, verbose))
{
ret = FcFalse;
break;
}
}
FcStrListDone (cache_dirs);
return ret;
}
int
main (int argc, char **argv)
{
FcStrSet *dirs;
FcStrList *list;
FcBool verbose = FcFalse;
FcBool force = FcFalse;
FcBool really_force = FcFalse;
FcBool systemOnly = FcFalse;
FcConfig *config;
int i;
int changed;
int ret;
#if HAVE_GETOPT_LONG || HAVE_GETOPT
int c;
#if HAVE_GETOPT_LONG
while ((c = getopt_long (argc, argv, "frsVvh", longopts, NULL)) != -1)
#else
while ((c = getopt (argc, argv, "frsVvh")) != -1)
#endif
{
switch (c) {
case 'r':
really_force = FcTrue;
/* fall through */
case 'f':
force = FcTrue;
break;
case 's':
systemOnly = FcTrue;
break;
case 'V':
fprintf (stderr, "fontconfig version %d.%d.%d\n",
FC_MAJOR, FC_MINOR, FC_REVISION);
exit (0);
case 'v':
verbose = FcTrue;
break;
case 'h':
usage (argv[0], 0);
default:
usage (argv[0], 1);
}
}
i = optind;
#else
i = 1;
#endif
if (systemOnly)
FcConfigEnableHome (FcFalse);
config = FcInitLoadConfig ();
if (!config)
{
fprintf (stderr, "%s: Can't init font config library\n", argv[0]);
return 1;
}
FcConfigSetCurrent (config);
if (argv[i])
{
dirs = FcStrSetCreate ();
if (!dirs)
{
fprintf (stderr, "%s: Can't create list of directories\n",
argv[0]);
return 1;
}
while (argv[i])
{
if (!FcStrSetAddFilename (dirs, (FcChar8 *) argv[i]))
{
fprintf (stderr, "%s: Can't add directory\n", argv[0]);
return 1;
}
i++;
}
list = FcStrListCreate (dirs);
FcStrSetDestroy (dirs);
}
else
list = FcConfigGetConfigDirs (config);
if ((processed_dirs = FcStrSetCreate()) == NULL) {
fprintf(stderr, "Cannot malloc\n");
return 1;
}
changed = 0;
ret = scanDirs (list, config, force, really_force, verbose, &changed);
/*
* Try to create CACHEDIR.TAG anyway.
* This expects the fontconfig cache directory already exists.
* If it doesn't, it won't be simply created.
*/
create_tag_file (config, verbose);
FcStrSetDestroy (processed_dirs);
cleanCacheDirectories (config, verbose);
/*
* Now we need to sleep a second (or two, to be extra sure), to make
* sure that timestamps for changes after this run of fc-cache are later
* then any timestamps we wrote. We don't use gettimeofday() because
* sleep(3) can't be interrupted by a signal here -- this isn't in the
* library, and there aren't any signals flying around here.
*/
FcConfigDestroy (config);
FcFini ();
if (changed)
sleep (2);
if (verbose)
printf ("%s: %s\n", argv[0], ret ? "failed" : "succeeded");
return ret;
}
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