mkdir du.testdir
cd du.testdir
dd if=/dev/zero of=file1 bs=1k count=64 2>/dev/null
dd if=/dev/zero of=file2 bs=1k count=16 2>/dev/null
# ext4 on images <512M gives 81kb
# ext3 on images <512M gives 83kb
# a bsd system reportedly gives 82kb
test x"`busybox du -k .`" = x"80	." \
  -o x"`busybox du -k .`" = x"81	." \
  -o x"`busybox du -k .`" = x"82	." \
  -o x"`busybox du -k .`" = x"83	." \
  -o x"`busybox du -k .`" = x"84	." \
  -o x"`busybox du -k .`" = x"88	."
