/*
* flushb.c --- Hides system-dependent information for both syncing a
* device to disk and to flush any buffers from disk cache.
- *
+ *
* Copyright (C) 2000 Theodore Ts'o.
*
* %Begin-Header%
- * This file may be redistributed under the terms of the GNU Public
- * License.
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
* %End-Header%
*/
+#include "config.h"
#include <stdio.h>
#if HAVE_ERRNO_H
#include <errno.h>
#include <sys/ioctl.h>
#endif
#if HAVE_SYS_MOUNT_H
+#include <sys/param.h>
#include <sys/mount.h> /* This may define BLKFLSBUF */
#endif
#include "ext2fs.h"
/*
- * For Linux, define BLKFLSBUF and FDFLUSH if necessary, since
+ * For Linux, define BLKFLSBUF and FDFLUSH if necessary, since
* not all portable header file does so for us. This really should be
* fixed in the glibc header files. (Recent glibcs appear to define
* BLKFLSBUF in sys/mount.h, but FDFLUSH still doesn't seem to be
* still is a race condition for those kernels, but this
* reduces it greatly.)
*/
+#if defined(HAVE_FSYNC)
if (fsync (fd) == -1)
return errno;
+#endif
if (flushb) {
+ errcode_t retval = 0;
#ifdef BLKFLSBUF
- ioctl (fd, BLKFLSBUF, 0); /* In case this is a HD */
-#else
- #warning BLKFLSBUF not defined
+ if (ioctl (fd, BLKFLSBUF, 0) == 0)
+ return 0;
+ retval = errno;
+#elif defined(__linux__)
+#warning BLKFLSBUF not defined
#endif
#ifdef FDFLUSH
- ioctl (fd, FDFLUSH, 0); /* In case this is floppy */
-#else
- #warning FDFLUSH not defined
+ /* In case this is a floppy */
+ if (ioctl(fd, FDFLUSH, 0) == 0)
+ return 0;
+ if (retval == 0)
+ retval = errno;
+#elif defined(__linux__)
+#warning FDFLUSH not defined
#endif
+ return retval;
}
return 0;
}