crc32() {
    for i in "$@"; do
        r=`cksum -o 3 "$i"`
        if [ $? -ne 0 ]; then
            continue
        fi
        echo -n "$i = "
        echo $r | sed 's/\([0-9][0-9]*\) .*/\1/' |
        xargs printf "%08X\n"
    done
}