Tarsnap config

tarsnap.sh

#!/bin/bash
# install in /etc/NetworkManager/dispatcher.d/02tarsnap

IF=$1
STATUS=$2

RETENTION_DAYS=7
RETENTION_COUNT=5

[[ "$STATUS" != 'up' ]] && exit
logger -s "NM Script up triggered $USER"

backups=$(mktemp)
tarsnap --list-archives > "${backups}"

grep -qF "$(uname -n)-$(date +%Y-%m-%d)" "${backups}" && exit

name="$(uname -n)-$(date +%Y-%m-%d_%H-%M-%S)"

logger -s "Create backup ${name}"
sudo tarsnap -cf "${name}" /home/michel

TIMESTAMP_RETENTION=$(( $(date '+%s') - (86400*$RETENTION_DAYS) ))

filter() {
    now=$(date '+%s')
    while read ; do
        current_backup=$(date -d$(echo "$REPLY" | sed 's/MBA-viseo-\(.*\)_.*/\1/') '+%s')
        [[ $now -gt $current_backup ]] && echo "$REPLY"
    done
}

sort -r "${backups}" | awk "NR>${RETENTION_COUNT}" | filter | xargs -n1 tarsnap -df