%prep

  mkdir whence.tmp
  pushd whence.tmp
  ln -s real step3
  ln -s step3 step2
  ln -s step2 step1
  touch real
  chmod +x real
  prefix=$PWD
  popd

%test

  (
    path=( $PWD/whence.tmp $path )
    whence -S step1
    whence -s step1
  )
0q:whence symlink resolution
>$prefix/step1 -> $prefix/step2 -> $prefix/step3 -> $prefix/real
>$prefix/step1 -> $prefix/real