[dastx]

Really scripts should avoid called `cd` or `pushd`/`popd` wherever possible. It's a lot better to just work with absolute directories, i.e. as someone else pointed out:

    DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

[Brian_K_White]

no no no... god this is gross and awful

  SELF=${0##*/}    # aka basename
  DIR=${0%/*}      # aka dirname

[dastx]

Running a script as sh script.sh returns only script.sh, thus, you've already got SELF, but you wouldn't get DIR.

[cat199]

but, you don't need it since you are already there, and can just use $PWD (no need for `pwd`) from that point onward.