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#!/bin/bash
# vim:ft=sh
# New line separated list of all directories to backup
DIRS="/etc
/home
/home_hdd"
# Name of the machine used in backup subvolumes
MNAME=asus
# Path where backup will be mounted
MPATH=/media/backup
# UUID of disk
UUID=b162ea95-38bb-42c6-b36a-1be98c65392c
# Mount additional arguments
MARGS="-o compress=lzo"
# If disk is encrypted
CRYPT=true
####################################################################
# Check if running as root
if [ `id -u` -ne "0" ]; then
echo Please run this as root.
exit 1
fi
set -e
# Mount disk
PART=$(lsblk -fpl | grep "$UUID" | awk '{print $1}')
if [ -z "$PART" ]; then
echo Disk not detected. Exiting
exit -1
fi
if $CRYPT; then
echo -e "\e[1;33mDecrypting filesystem\e[0m"
# TODO what if already opened
cryptsetup open "$PART" backup || (echo Decryption failed && exit -2)
PART=/dev/mapper/backup
echo $PART
fi
echo -e "\e[1;33mMounting\e[0m"
mkdir -p "$MPATH"
mount $MARGS "$PART" "$MPATH" || (echo Mount failed && exit -3)
[ -d "$MPATH"/@"$MNAME" ] || (echo There seems to be no subvolume $MNAME && exit -4)
# Do backup
while read -r DIR; do
echo -e "\e[1;33mBacking up: $DIR\e[0m"
rsync -a --progress "$DIR" "$MPATH"/@"$MNAME"/
done <<< "$DIRS"
# Do snapshot (read only)
(cd "$MPATH"; btrfs subvolume snapshot -r @asus @asus-$(date -u +%y%m%d))
# Remove snapshots older than 2 months
# TODO ensure that at least five stays
(cd "$MPATH"
for s in @"$MNAME"-*; do
if [ $(expr $(date +%s) - $(stat -c %Y "$s")) -gt 5529600 ]; then
btrfs subvolume delete "$s"
fi
done)
# Unmount disk
sync -f "$MPATH"/@"$MNAME"
umount "$MPATH" || (echo Unmount failed. Unmount by hand. && exit -5)
if $CRYPT; then
cryptsetup close backup || (echo Encryption close failed. Do by hand. && exit -6)
fi
# Store when we did last backup and update i3blocks status
date +"%s" > /home/cynerd/.backup_date
pkill -RTMIN+13 i3blocks
echo
echo -e "\e[1;34mBackup finished\e[0m"
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