full_dir_of_executing_script.sh

#!/usr/bin/env bash

# Store the full directory name of the executing script, no matter where it is
# being called from.  This will work as long as the last component of the path
# used to find the script is not a symlink; directory links are OK.
# SEE: http://stackoverflow.com/questions/59895/can-a-bash-script-tell-what-directory-its-stored-in
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

echo $DIR