This is from the dd/sparse failure:
On 03/17/2012 02:31 AM, Bruno Haible wrote:
> + alloc_equal file.in file.out
> + : 4
> +++ stat -c %b file.in
> +++ stat -c %b file.out
> ++ expr 4160 - 4128
> + alloc_diff=32
> ++ echo 32
> ++ tr -d -- -
> + alloc_diff=32
> + test 32 -le 4
> + fail=1
That confirms that sparse granularity is
coarser than I assumed on the BSDs.
Perhaps this is appropriate:
diff --git a/tests/dd/sparse b/tests/dd/sparse
index 17aa94b..203e103 100755
--- a/tests/dd/sparse
+++ b/tests/dd/sparse
@@ -51,10 +51,10 @@ dd if=/dev/urandom of=file.in bs=1M count=1 conv=notrunc
oflag=append
# but can vary by a file system block due to alignment,
# which was seen on XFS at least.
alloc_equal() {
- : ${sectors_per_block:=$(expr $(stat -f -c "%S" .) / 512)}
+ : ${sectors_per_sparse_block:=$(expr $(stat -f -c "%S" .) / 64)}
alloc_diff=$(expr $(stat -c %b "$1") - $(stat -c %b "$2"))
alloc_diff=$(echo $alloc_diff | tr -d -- -) # abs()
- test $alloc_diff -le $sectors_per_block
+ test $alloc_diff -le $sectors_per_sparse_block
}
