#!/bin/bash
# EvoBackup cronjob.

. /etc/evobackup/conf.d/cron.cf

# Verify if an EvoBackup is already launched, if true, kill it.
if [ -e $PIDFILE ]; then
    # Killing the childs of evobackup.
    for pid in $(ps h --ppid $(cat $PIDFILE) -o pid | tr -s '\n' ' '); do
        kill -9 $pid;
    done
    # Then kill the main PID.
    kill -9 $(cat $PIDFILE)
    echo "$0 is running (PID $(cat $PIDFILE)). Process killed." >&2
fi
echo "$$" > $PIDFILE
trap "rm -f $PIDFILE" EXIT INT

# Executes tasks to do before rsync.
run-parts /etc/evobackup/actions.d/

hostname=$(hostname -f)
start=$(date --rfc-3339=seconds)
date=$(date +%Y-%m-%d)
tmplog=$(mktemp --tmpdir=/tmp evobackup.XXX)

args="-avzh --stats --force --ignore-errors --partial "\
"--include-from=/etc/evobackup/conf.d/include.cf "\
"--delete --delete-excluded"
dst="rsync://${RSYNC_USERNAME}@${BACKUPSERVER}/${RSYNC_PATH}"

# Is there a current version? If no create it.
rsync --list-only ${dst}/current >/dev/null 2>&1
status=$?
if [ "$status" != 0 ]; then
    # First backup.
    rsync $args / ${dst}/current > $tmplog
else
    # Backups with incrementials.
    rsync $args --link-dest=/current/ / ${dst}/${date} > $tmplog
fi
status=$?

# Keep the last 30 lines & clean temporary log.
tail -30 $tmplog >> $LOG && rm $tmplog

stop=$(date --rfc-3339=seconds)
echo "EvoBackup started at $start." >> $LOG
echo "EvoBackup finished at $stop." >> $LOG

# Send a report
# Did rsync sucessfully finished?
if [ "$status" != 0 ]; then
    tail -30 $LOG \
        | mailx -s "[warn] EvoBackup for $hostname did not finish correctly." \
        $MAIL_TO
else
    tail -30 $LOG \
        | mailx -s "[info] EvoBackup report for $hostname" $MAIL_TO
fi