#!/bin/bash
if [[ -z $1 ]]; then
    echo 'all or vm-name'
fi

if [[ $1 = 'all' ]]; then
    machine=$(virsh -c qemu:///system list --name)
else 
    machine=("$@")
fi 

for i in ${machine[@]}; do
    snapshot=$(virsh -c qemu:///system snapshot-list $i | sed -n 3p | awk '{print $1}')
    virsh -c qemu:///system destroy $i
    virsh -c qemu:///system snapshot-revert $i $snapshot
    if [[ $2 = 'stop' ]]; then
	true
    else
    	virsh -c qemu:///system start $i
	fi
done