1 files changed, 67 insertions, 0 deletions
diff --git a/e2fsck/flushb.c b/e2fsck/flushb.c
new file mode 100644
index 0000000..6100fc6
--- /dev/null
+++ b/e2fsck/flushb.c
@@ -0,0 +1,67 @@
+/*
+ * flushb.c --- This routine flushes the disk buffers for a disk
+ *
+ * Copyright 1997, 2000, by Theodore Ts'o.
+ *
+ * WARNING: use of flushb on some older 2.2 kernels on a heavily loaded
+ * system will corrupt filesystems.  This program is not really useful
+ * beyond for benchmarking scripts.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include "config.h"
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mount.h>
+#include "../misc/nls-enable.h"
+
+/* For Linux, define BLKFLSBUF if necessary */
+#if (!defined(BLKFLSBUF) && defined(__linux__))
+#define BLKFLSBUF	_IO(0x12,97)	/* flush buffer cache */
+#endif
+
+const char *progname;
+
+static void usage(void)
+{
+	fprintf(stderr, _("Usage: %s disk\n"), progname);
+	exit(1);
+}
+
+int main(int argc, char **argv)
+{
+	int	fd;
+
+	progname = argv[0];
+	if (argc != 2)
+		usage();
+
+	fd = open(argv[1], O_RDONLY, 0);
+	if (fd < 0) {
+		perror("open");
+		exit(1);
+	}
+	/*
+	 * Note: to reread the partition table, use the ioctl
+	 * BLKRRPART instead of BLKFSLBUF.
+	 */
+#ifdef BLKFLSBUF
+	if (ioctl(fd, BLKFLSBUF, 0) < 0) {
+		perror("ioctl BLKFLSBUF");
+		exit(1);
+	}
+	return 0;
+#else
+	fprintf(stderr,
+		_("BLKFLSBUF ioctl not supported!  Can't flush buffers.\n"));
+	return 1;
+#endif
+}