echo "creating test file"
dd if=/dev/zero of=$testfile count=4096
-mtime1=`stat --printf="%Y" $testfile`
-ctime1=`stat --printf="%Z" $testfile`
+mtime1=`stat -c "%Y" $testfile`
+ctime1=`stat -c "%Z" $testfile`
sleep 2
-c 'mwrite 0 4096' \
$testfile | _filter_xfs_io_unique
-mtime2=`stat --printf="%Y" $testfile`
-ctime2=`stat --printf="%Z" $testfile`
+mtime2=`stat -c "%Y" $testfile`
+ctime2=`stat -c "%Z" $testfile`
let mtime_diff=$mtime2-$mtime1
let ctime_diff=$ctime2-$ctime1