pre-backup

#!/bin/bash
mountpoint="/mnt/backup/"
devicedir="/dev/cryptpool/"
echo "$1" | grep -q "$mountpoint"
if [ $? -ne 0 ] ; then
    exit 0
fi
orig=$(echo "$1" | sed -e 's:^'$mountpoint'::' -e 's:/$::')
full=$(echo "$1" | sed 's:/$::')
if [ "$full" != "$mountpoint$orig" ];
then
    echo "Error!"
    exit 1
fi
lvcreate -n "$orig"backup -s "$devicedir$orig" -l 100%FREE
retlv=$?
if [ $retlv -ne 0 ]; then
    echo "Error creating logical volume. return value: $retlv"
    exit $retlv
fi
mkdir -p $full
mount -o ro "$devicedir$orig"backup $full