Script to delete unattached EBS volumes on Amazon EC2

prune-volumes.sh

#!/bin/sh

y=false
while getopts "y" OPTION
do
    case $OPTION in
        y)
            y=true
            ;;
        ?)
            exit
            ;;
    esac
done

for v in $(ec2-describe-volumes | grep VOLUME | grep available | awk '{print $2}'); do
    if [ "$y" != "true" ]; then
        echo "Available volume found $v . Delete? [Nya]"
        read opt
        if [ "$opt" == "a" ]; then
            y=true
            opt=y
        fi
    else
        opt=y
    fi
    if [ "$opt" == "y" -o "$opt" == "Y" -o "$opt" == "yes" ]; then
        echo "Deleting $v";
        ec2-delete-volume $v
    fi
done