so that this test works with SELinux-enable systems.
Based on a patch from Tim Waugh.
# Ensure that -D makes du dereference even symlinks to non-directories.
# The sed command maps the 68 I get on an ext3 file system to the 64 I expected.
-# On tmpfs, I get 64.
-du -kD slink-to-64k | sed 's/^6[0-9]/64/' >> out
+# On tmpfs, I get 64. Similarly, on SELinux-enabled systems, file security
+# context labels take up filesystem space, making du print 72 here.
+du -kD slink-to-64k | sed 's/^[67][0-9]/64/' >> out
cat <<\EOF > exp
slink/a
slink