FcBool
FcFileIsDir (const FcChar8 *file)
{
struct stat statb;
if (FcStat ((const char *) file, &statb) != 0)
return FcFalse;
return S_ISDIR(statb.st_mode);
}
static FcFileTime
FcConfigNewestFile (FcStrSet *files)
{
FcStrList *list = FcStrListCreate (files);
FcFileTime newest = { 0, FcFalse };
FcChar8 *file;
struct stat statb;
if (list)
{
while ((file = FcStrListNext (list)))
if (FcStat (file, &statb) == 0)
if (!newest.set || statb.st_mtime - newest.time > 0)
{
newest.set = FcTrue;
newest.time = statb.st_mtime;
}
FcStrListDone (list);
}
return newest;
}
static int
FcDirCacheOpenFile (const FcChar8 *cache_file, struct stat *file_stat)
{
int fd;
#ifdef _WIN32
if (FcStat (cache_file, file_stat) < 0)
return -1;
#endif
fd = FcOpen((char *) cache_file, O_RDONLY | O_BINARY);
if (fd < 0)
return fd;
#ifndef _WIN32
if (fstat (fd, file_stat) < 0)
{
close (fd);
return -1;
}
#endif
return fd;
}
FcBool FcAtomicLock(FcAtomic *atomic) {
int ret;
struct stat lck_stat;
#ifdef HAVE_LINK
int fd = -1;
FILE *f = 0;
FcBool no_link = FcFalse;
strcpy((char *)atomic->tmp, (char *)atomic->file);
strcat((char *)atomic->tmp, TMP_NAME);
fd = FcMakeTempfile((char *)atomic->tmp);
if (fd < 0) return FcFalse;
f = fdopen(fd, "w");
if (!f) {
close(fd);
unlink((char *)atomic->tmp);
return FcFalse;
}
ret = fprintf(f, "%ld\n", (long)getpid());
if (ret <= 0) {
fclose(f);
unlink((char *)atomic->tmp);
return FcFalse;
}
if (fclose(f) == EOF) {
unlink((char *)atomic->tmp);
return FcFalse;
}
ret = link((char *)atomic->tmp, (char *)atomic->lck);
if (ret < 0 && errno == EPERM) {
/* the filesystem where atomic->lck points to may not supports
* the hard link. so better try to fallback
*/
ret = mkdir((char *)atomic->lck, 0600);
no_link = FcTrue;
}
(void)unlink((char *)atomic->tmp);
#else
ret = mkdir((char *)atomic->lck, 0600);
#endif
if (ret < 0) {
/*
* If the file is around and old (> 10 minutes),
* assume the lock is stale. This assumes that any
* machines sharing the same filesystem will have clocks
* reasonably close to each other.
*/
if (FcStat(atomic->lck, &lck_stat) >= 0) {
time_t now = time(0);
if ((long int)(now - lck_stat.st_mtime) > 10 * 60) {
#ifdef HAVE_LINK
if (no_link) {
if (rmdir((char *)atomic->lck) == 0)
return FcAtomicLock(atomic);
} else {
if (unlink((char *)atomic->lck) == 0)
return FcAtomicLock(atomic);
}
#else
if (rmdir((char *)atomic->lck) == 0)
return FcAtomicLock(atomic);
#endif
}
}
return FcFalse;
}
(void)unlink((char *)atomic->new_file);
return FcTrue;
}