Shell Programming and Scripting

/red/rotten/apple.t
/red/rotten/apple.x
/green/ripe/pear.t
/green/ripe/pear.x
/green/ripe/grapes.t
/green/ripe/grapes.x
/green/rotten/oranges.t
/green/rotten/oranges.x

/orchard1/old
/orchard1/new
/orchard2/old
/orchard2/new
/orchard6/old
/orchard6/new
/orchard8/old
/orchard8/new

if [ $# -ne 2 ]
then
   echo "usage: $0 list_file dir_file"
   exit 1
fi
LIST_FILE=$1
DIR_FILE=$2
if [ ! -f "$LIST_FILE" ]
then
   echo "unable to open list_file: $LIST_FILE"
   exit 2
fi
if [ ! -f "$DIR_FILE" ]
then
   echo "unable to open dir_file: $DIR_FILE"
   exit 3
fi
found=0
for action in list count del
do
    for del_dir in $(cat $DIR_FILE)
    do
        for del_path in $(cat $LIST_FILE)
        do
            [ -f ${del_dir}/${del_path} ] && case $action in
               count) let found=found+1 ;;
               list) echo "  ${del_dir}/${del_path}" ;;
               del) rm ${del_dir}/${del_path} ;;
            esac
        done
    done
    if [ $action = "count" ]
    then
        [ $found -eq 0 ] && echo "No files found to delete" && exit 5
        printf "OK to delete %d file(s) (Y/N)? " $found
        read ans
        [ "$ans" != "Y" -a "$ans" != "y" ] && exit 0
    fi
done

join -12 -22 dirs files | tr -d ' ' | xargs echo rm --