case $# in
        1)    dir="."
              ;;

        2)    dir=$2
              if [ ! -d $dir ]
              then    echo "grepdir: cannot find directory $dir"
                      exit 1
              fi
              ;;
 
        *)    echo "grepdir: syntax: grepdir pattern [directory]"
              exit 1
              ;;
esac

find $dir -type f -print | xargs grep -i "$1" | pg