gistfile1.sh

#!/bin/sh

usage(){
    cat <<EOF
Usage: $0 [add|del] pkg

add add pkg to the system
del remove pkg from the system
EOF
    exit 255
}

[ $# -lt 2 ] && usage
case "$1" in
    add)
        if [ ! -f "$2.tar.bz2" ]; then
            echo "$2.tar.bz2 can not be read"
            exit 255
        fi
        mkdir -p "/pkg/$2"
        echo "installing $2"
        bzip2 -dc "$2.tar.bz2" | tar xvC / > "/pkg/$2/files"
        exit $?
        ;;
    del)
        if [ ! -d "/pkg/$2" ]; then
            echo "/pkg/$2 does not exist or is not a directory"
            exit 255
        fi
        if [ ! -e "/pkg/$2/files" ]; then
            echo "/pkg/$2/files does not exist"
        fi
        tac "$tmp" | while read f; do
            f="/$f"
            if [ ! -d "$f" ]; then
                rm "$f"
            elif [ `find "$f" | wc -l` -eq 0 ]; then
                rm -r "$f"
            fi
        done
        rm -rf "/pkg/$2"
        ;;
    *)
        usage
        ;;
esac