kimono-koans

You're going to need to snap your root according to zsys convention (just using a date won't work), like this: 

#!/bin/bash

DATE_HASH="$( date | cksum | cut -f1 -d' ' | tr -d '\n' | xargs -0 printf '%x\n' )"

zfs snapshot -r bpool@snap_"$DATE_HASH"_prepApt
zfs snapshot rpool@snap_"$DATE_HASH"_prepApt
zfs snapshot -r rpool/ROOT@snap_"$DATE_HASH"_prepApt
zfs snapshot -r rpool/USERDATA@snap_"$DATE_HASH"_prepApt

dadatuputi

#!/bin/bash

usage() { echo "Usage: $0 -p <POOL> (-s|-l)" 1>&2; exit 1; }

while getopts ":p:sl" o; do
    case "${o}" in
        p)
            p=${OPTARG}
            ;;
        s)