#!/usr/bin/bash

usage()
{
    echo "Usage: $0 [ -s hostname ] [ -z UUID ] [ -b backupzone ] [ -i idbackupzone ]" >&2
    exit 1
}

check_err()
{
    STATUS=$?
    if [ ${STATUS} -ne 0 ]; then
        echo "Unexpected error: ${STATUS}"
        exit ${STATUS}
    fi
}

check_snap()
{
    ZONE=$1
    zfs list -t snapshot zones/${ZONE}@`date +%Y%m%d` 2&>/dev/null 1>&2
}

create_snap()
{
    ZONE=$1
    echo "Creating snapshot of ${ZONE}..."
    zfs snapshot zones/${ZONE}@`date +%Y%m%d`
    check_err
    echo "done."
}

while getopts ":s:z:b:i:" opt;
do
    case "$opt" in
        s)
	    SOURCEGZ=$OPTARG
            ;;
        z)
	    UUID=$OPTARG
	    ;;
        b)
	    BACKUPZ=$OPTARG
	    ;;
        i)
	    IDBACKUPZ=$OPTARG
	    ;;
        \?)
	    echo "Error: Invalid Option: -${OPTARG}" >&2
            usage
            ;;
        :)
            echo "Error: -${OPTARG} requires an argument."
            usage
            ;;
        *)
	    usage
	    ;;
    esac
done

shift $((OPTIND -1 ))

if [ -z ${SOURCEGZ} ] || [ -z "${UUID}" ] || [ -z ${BACKUPZ} ] || [ -z ${IDBACKUPZ} ]; then
    usage
fi

echo "Checking for snapshot of ${UUID}"
check_snap ${UUID}
if [ $? -ne 0 ]; then
    create_snap ${UUID}
else
    echo "Snapshot of ${UUID} already available..."
    echo "done."
fi

echo "Sending snapshot to ${BACKUPZ}..."
zfs send zones/${UUID}@`date +%Y%m%d` | ssh -i /usbkey/ssh/id_rsa -p 2221 $BACKUPZ zfs receive zones/${IDBACKUPZ}/data/${SOURCEGZ}/${UUID}
check_err
echo "done."

echo "Sending config to ${BACKUPZ}..."
zonecfg -z ${UUID} export | ssh -i /usbkey/ssh/id_rsa -p 2221 $BACKUPZ "cat >/data/${SOURCEGZ}/${UUID}.cfg"
check_err
echo "done."