#!/bin/bash

if [ "$EUID" -ne 0 ]
  then echo "Please run as root."
  exit
fi

TIME=$(date +%Y_%m_%d-%H_%M)

echo $TIME > /SNAPSHOT
echo $TIME > /home/SNAPSHOT

mkdir /tmp/btrfsnap-$TIME

mount $(findmnt / -no SOURCE | cut -d '[' -f 1) /tmp/btrfsnap-$TIME

btrfs subvol snap -r /tmp/btrfsnap-$TIME/@root /tmp/btrfsnap-$TIME/@snapshots/@root-$TIME

btrfs subvol snap -r /tmp/btrfsnap-$TIME/@home /tmp/btrfsnap-$TIME/@snapshots/@home-$TIME

umount /tmp/btrfsnap-$TIME

rmdir /tmp/btrfsnap-$TIME

rm /SNAPSHOT

rm /home/SNAPSHOT