mkdir -p $tmp || framework_failure=1
cd $tmp || framework_failure=1
mkdir -p a/b d d/sub || framework_failure=1
-printf 'make-sure-the-file-is-non-empty\n' > a/b/F || framework_failure=1
# Ensure that these files contain more than 64 bytes, so that we don't
# immediately disqualify file systems (e.g., NetApp) on which smaller
# files take up zero disk blocks.
+printf '%*s' 65 make-sure-the-file-is-non-empty > a/b/F || framework_failure=1
seq --format=%100g 1 90 | head --bytes=4k > d/1
cp d/1 d/sub/2