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author | marha <marha@users.sourceforge.net> | 2011-09-12 11:27:51 +0200 |
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committer | marha <marha@users.sourceforge.net> | 2011-09-12 11:27:51 +0200 |
commit | dafebc5bb70303f0b5baf0b087cf4d9a64b5c7f0 (patch) | |
tree | bdf833cc6a4fc9035411779e10dd9e8478201885 /fontconfig/src/fcatomic.c | |
parent | 0b40f5f4b54453a77f4b09c431f8efc6875da61f (diff) | |
download | vcxsrv-dafebc5bb70303f0b5baf0b087cf4d9a64b5c7f0.tar.gz vcxsrv-dafebc5bb70303f0b5baf0b087cf4d9a64b5c7f0.tar.bz2 vcxsrv-dafebc5bb70303f0b5baf0b087cf4d9a64b5c7f0.zip |
Synchronised line endinge with release branch
Diffstat (limited to 'fontconfig/src/fcatomic.c')
-rw-r--r-- | fontconfig/src/fcatomic.c | 434 |
1 files changed, 217 insertions, 217 deletions
diff --git a/fontconfig/src/fcatomic.c b/fontconfig/src/fcatomic.c index cc16a9c96..b5f3d5aaa 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 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__
+/* + * 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__ |