#!/bin/bash -e

# Run this at a lower priority to avoid disrupting the rest of the system
# Exclude other filesystems from the backup. This leaves only the files we
# want, on the root file system, to back up.
# Also exclude other large collections of files which we don't care to save.

if [ -f /.backup_running ]; then
    echo "Backup already running!"
    exit 1
fi

touch /.backup_running

ionice -c3 nice -n5 \
    rdiff-backup \
        --exclude-other-filesystems \
        --exclude-sockets \
        --exclude '/backup' \
        --exclude '/tmp' \
        --exclude '/var/cache/apt/archives' \
        --exclude '/var/log' \
        / /backup/
# Remove old backups
sleep 3600
ionice -c3 nice -n5 rdiff-backup -v1 --remove-older-than 60D /backup/

rm -f /.backup_running

exit 0