#!/bin/sh
#   snapscre.sh:
#      create target system snapshots before "risky procedure".
#      see ref01/linux/btrfs/snapshots.html
#                                             1
#      invoke: # /path/to/scripts/snapscre.sh yymmdda
#                                             |     |
#                                             |     + suffix
#                                             |
#                                             + current date
#
# 2022/03/10 Initial version
#
# set constants
#
scriptid='snapscre.sh:'
#
# verify correct number of arguments passed (1)
#
if [ $# -ne 1 ]
then
    echo $scriptid Error: argument count not 1
    exit 8
fi
#
echo 'btrfs subv list /'
btrfs subv list /
echo "btrfs subv snapshot -r /home /home/home_$1"
btrfs subv snapshot -r /home /home/home_$1
echo "btrfs subv snapshot -r / /root_$1"
btrfs subv snapshot -r / /root_$1
echo "btrfs subv snapshot -r /var/lib/machines /machines_$1"
btrfs subv snapshot -r /var/lib/machines /machines_$1
echo 'btrfs subv list /'
btrfs subv list /
exit 0