A utility function for getting the directory of the shell script itself.

script_dir.sh

#!/bin/bash

script_dir()
{
  local SCRIPT_PATH=${BASH_SOURCE[0]}
  while [ -L "${SCRIPT_PATH}" ]; do
    SCRIPT_PATH=`readlink "$SCRIPT_PATH"`
  done

  local SCRIPT_DIR=`dirname "${SCRIPT_PATH}"`
  pushd . > /dev/null
  cd "$SCRIPT_DIR" > /dev/null
  SCRIPT_DIR=`pwd`
  
  popd > /dev/null
  echo "$SCRIPT_DIR"
} 
    
ScriptDir=`script_dir`
echo $ScriptDir