backup.sh

#!/bin/sh

############################### Backup Script #################################
# Backup script invoked by systemd (timer) to ensure hourly backups.          #
# DATE is not appended to the file. This is because the server used as TRG    #
# snapshots the data set and saves: hourly  snapshots for a day               #
#                                   daily   snapshots for a weekly            #
#                                   monthly snapshots for a year              #
#                                                                             #
# At the moment the script starts of by checking that the laptop is charging; #                                                                             #
# The script also checks that the computer have internet access. If both are  #
# satisfied, we sync away.                                                    #
###############################################################################

## Variables
PING="8.8.8.8"
DATE=`date "+%Y-%m-%d"`
TIME=`date "+%H:%M"`
SRC="/"
TRG="backup:/mnt/volume1/backup/laptop"
EXC="/home/erik/scripts/exclude_laptop_rsync.txt"
OPT="-aXz --partial --delete --delete-excluded --exclude-from=$EXC --chmod=o-t --bwlimit=5000"
LOG="/var/log/laptop_backup"

#DOCKED=$(cat /sys/devices/platform/dock.0/docked)  # can be used to see if laptop is in docking station
CHARGING=$(acpi -a)
NLINES=$(sed -n '$=' $LOG)

if [ "$CHARGING" == "Adapter 0: on-line" ]; then
    ping -c 1 $PING > /dev/null
    if [ "$?" == 0 ]; then  # verify that ping worked
        rsync $OPT $SRC $TRG
	if [ "$?" == 0 ]; then  # verify that rsync worked
                if [ "$NLINES" == 1000 ]; then
                echo "Old log file got too long. Restarting log file." > $LOG
            fi
            echo "Incremental backup of laptop taken: $DATE at $TIME" >> $LOG
        else
            echo "Rsync result != 0, $DATE at $TIME" >> $LOG
	    notify-send "Somenthing went wrong with the laptop backup script!"  # send msg to dunst
        fi
    fi
fi