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-rw-r--r--fontconfig/src/fcatomic.c434
1 files changed, 217 insertions, 217 deletions
diff --git a/fontconfig/src/fcatomic.c b/fontconfig/src/fcatomic.c
index d6121305a..cc16a9c96 100644
--- a/fontconfig/src/fcatomic.c
+++ b/fontconfig/src/fcatomic.c
@@ -1,217 +1,217 @@
-/*
- * fontconfig/src/fcatomic.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 Keith Packard not be used in
- * advertising or publicity pertaining to distribution of the software without
- * specific, written prior permission. Keith Packard makes 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.
- */
-
-/*
- * fcatomic.c
- *
- * Lock cache and configuration files for atomic update
- *
- * Uses only regular filesystem calls so it should
- * work even in the absense of functioning file locking
- *
- * On Unix, four files are used:
- * file - the data file accessed by other apps.
- * new - a new version of the data file while it's being written
- * lck - the lock file
- * tmp - a temporary file made unique with mkstemp
- *
- * Here's how it works:
- * Create 'tmp' and store our PID in it
- * Attempt to link it to 'lck'
- * Unlink 'tmp'
- * If the link succeeded, the lock is held
- *
- * On Windows, where there are no links, no tmp file is used, and lck
- * is a directory that's mkdir'ed. If the mkdir succeeds, the lock is
- * held.
- */
-
-#include "fcint.h"
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <time.h>
-
-#ifdef _WIN32
-#undef mkdir
-#define mkdir(path,mode) _mkdir(path)
-#endif
-
-#define NEW_NAME ".NEW"
-#define LCK_NAME ".LCK"
-#define TMP_NAME ".TMP-XXXXXX"
-
-FcAtomic *
-FcAtomicCreate (const FcChar8 *file)
-{
- int file_len = strlen ((char *) file);
- int new_len = file_len + sizeof (NEW_NAME);
- int lck_len = file_len + sizeof (LCK_NAME);
- int tmp_len = file_len + sizeof (TMP_NAME);
- int total_len = (sizeof (FcAtomic) +
- file_len + 1 +
- new_len + 1 +
- lck_len + 1 +
- tmp_len + 1);
- FcAtomic *atomic = malloc (total_len);
- if (!atomic)
- return 0;
- FcMemAlloc (FC_MEM_ATOMIC, total_len);
-
- atomic->file = (FcChar8 *) (atomic + 1);
- strcpy ((char *) atomic->file, (char *) file);
-
- atomic->new = atomic->file + file_len + 1;
- strcpy ((char *) atomic->new, (char *) file);
- strcat ((char *) atomic->new, NEW_NAME);
-
- atomic->lck = atomic->new + new_len + 1;
- strcpy ((char *) atomic->lck, (char *) file);
- strcat ((char *) atomic->lck, LCK_NAME);
-
- atomic->tmp = atomic->lck + lck_len + 1;
-
- return atomic;
-}
-
-FcBool
-FcAtomicLock (FcAtomic *atomic)
-{
- int fd = -1;
- FILE *f = 0;
- int ret;
- struct stat lck_stat;
-
-#ifdef HAVE_LINK
- strcpy ((char *) atomic->tmp, (char *) atomic->file);
- strcat ((char *) atomic->tmp, TMP_NAME);
- fd = mkstemp ((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);
- (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 ((char *) atomic->lck, &lck_stat) >= 0)
- {
- time_t now = time (0);
- if ((long int) (now - lck_stat.st_mtime) > 10 * 60)
- {
-#ifdef HAVE_LINK
- 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);
- return FcTrue;
-}
-
-FcChar8 *
-FcAtomicNewFile (FcAtomic *atomic)
-{
- return atomic->new;
-}
-
-FcChar8 *
-FcAtomicOrigFile (FcAtomic *atomic)
-{
- return atomic->file;
-}
-
-FcBool
-FcAtomicReplaceOrig (FcAtomic *atomic)
-{
-#ifdef _WIN32
- unlink (atomic->file);
-#endif
- if (rename ((char *) atomic->new, (char *) atomic->file) < 0)
- return FcFalse;
- return FcTrue;
-}
-
-void
-FcAtomicDeleteNew (FcAtomic *atomic)
-{
- unlink ((char *) atomic->new);
-}
-
-void
-FcAtomicUnlock (FcAtomic *atomic)
-{
-#ifdef HAVE_LINK
- unlink ((char *) atomic->lck);
-#else
- rmdir ((char *) atomic->lck);
-#endif
-}
-
-void
-FcAtomicDestroy (FcAtomic *atomic)
-{
- FcMemFree (FC_MEM_ATOMIC, sizeof (FcAtomic) +
- strlen ((char *) atomic->file) * 4 + 4 +
- sizeof (NEW_NAME) + sizeof (LCK_NAME) +
- sizeof (TMP_NAME));
-
- free (atomic);
-}
-#define __fcatomic__
-#include "fcaliastail.h"
-#undef __fcatomic__
+/*
+ * fontconfig/src/fcatomic.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.
+ */
+
+/*
+ * fcatomic.c
+ *
+ * Lock cache and configuration files for atomic update
+ *
+ * Uses only regular filesystem calls so it should
+ * work even in the absense of functioning file locking
+ *
+ * On Unix, four files are used:
+ * file - the data file accessed by other apps.
+ * new - a new version of the data file while it's being written
+ * lck - the lock file
+ * tmp - a temporary file made unique with mkstemp
+ *
+ * Here's how it works:
+ * Create 'tmp' and store our PID in it
+ * Attempt to link it to 'lck'
+ * Unlink 'tmp'
+ * If the link succeeded, the lock is held
+ *
+ * On Windows, where there are no links, no tmp file is used, and lck
+ * is a directory that's mkdir'ed. If the mkdir succeeds, the lock is
+ * held.
+ */
+
+#include "fcint.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <time.h>
+
+#ifdef _WIN32
+#undef mkdir
+#define mkdir(path,mode) _mkdir(path)
+#endif
+
+#define NEW_NAME ".NEW"
+#define LCK_NAME ".LCK"
+#define TMP_NAME ".TMP-XXXXXX"
+
+FcAtomic *
+FcAtomicCreate (const FcChar8 *file)
+{
+ int file_len = strlen ((char *) file);
+ int new_len = file_len + sizeof (NEW_NAME);
+ int lck_len = file_len + sizeof (LCK_NAME);
+ int tmp_len = file_len + sizeof (TMP_NAME);
+ int total_len = (sizeof (FcAtomic) +
+ file_len + 1 +
+ new_len + 1 +
+ lck_len + 1 +
+ tmp_len + 1);
+ FcAtomic *atomic = malloc (total_len);
+ if (!atomic)
+ return 0;
+ FcMemAlloc (FC_MEM_ATOMIC, total_len);
+
+ atomic->file = (FcChar8 *) (atomic + 1);
+ strcpy ((char *) atomic->file, (char *) file);
+
+ atomic->new = atomic->file + file_len + 1;
+ strcpy ((char *) atomic->new, (char *) file);
+ strcat ((char *) atomic->new, NEW_NAME);
+
+ atomic->lck = atomic->new + new_len + 1;
+ strcpy ((char *) atomic->lck, (char *) file);
+ strcat ((char *) atomic->lck, LCK_NAME);
+
+ atomic->tmp = atomic->lck + lck_len + 1;
+
+ return atomic;
+}
+
+FcBool
+FcAtomicLock (FcAtomic *atomic)
+{
+ int fd = -1;
+ FILE *f = 0;
+ int ret;
+ struct stat lck_stat;
+
+#ifdef HAVE_LINK
+ strcpy ((char *) atomic->tmp, (char *) atomic->file);
+ strcat ((char *) atomic->tmp, TMP_NAME);
+ fd = mkstemp ((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);
+ (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 (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);
+ return FcTrue;
+}
+
+FcChar8 *
+FcAtomicNewFile (FcAtomic *atomic)
+{
+ return atomic->new;
+}
+
+FcChar8 *
+FcAtomicOrigFile (FcAtomic *atomic)
+{
+ return atomic->file;
+}
+
+FcBool
+FcAtomicReplaceOrig (FcAtomic *atomic)
+{
+#ifdef _WIN32
+ unlink (atomic->file);
+#endif
+ if (rename ((char *) atomic->new, (char *) atomic->file) < 0)
+ return FcFalse;
+ return FcTrue;
+}
+
+void
+FcAtomicDeleteNew (FcAtomic *atomic)
+{
+ unlink ((char *) atomic->new);
+}
+
+void
+FcAtomicUnlock (FcAtomic *atomic)
+{
+#ifdef HAVE_LINK
+ unlink ((char *) atomic->lck);
+#else
+ rmdir ((char *) atomic->lck);
+#endif
+}
+
+void
+FcAtomicDestroy (FcAtomic *atomic)
+{
+ FcMemFree (FC_MEM_ATOMIC, sizeof (FcAtomic) +
+ strlen ((char *) atomic->file) * 4 + 4 +
+ sizeof (NEW_NAME) + sizeof (LCK_NAME) +
+ sizeof (TMP_NAME));
+
+ free (atomic);
+}
+#define __fcatomic__
+#include "fcaliastail.h"
+#undef __fcatomic__
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-20 11:57:57 +0000