root/adm/backup/backup.sh

#!/bin/bash
#
# Make backups according to $backuptab (usually /etc/backuptab).  No
# parameters.
#
# $backuptab format:
# <Block device>\t+<Target backup directory>\t+<Increments keep time>\t+<snapshot>
#
# For example:
# /dev/orion/betelgeuse /srv/backup/betelgeuse          1W      1
# /dev/sda1             /srv/backup/betelgeuse/boot     1M      0
#
# Feel free to copy and modify.
# --xio

# BEGIN USER-DEFINED SECTION
backup_script="/usr/local/sbin/backup-worker.sh"
backuptab="/etc/backuptab"
# END USER-DEFINED SECTION

if [ -x "$backup_script" ]; then
        echo "Backup script $backup_script found."
else
        echo "Backup script $backup_script does not exist or not executable." 1>&2
        exit 1
fi

if [ -r "$backuptab" ]; then
        echo "Backuptab $backuptab is readable."
else
        echo "Backuptab $backuptab cannot be read." 1>&2
        exit 1
fi

echo "Starting system backup..."

# Parse $backuptab, strip comments and empty lines, call main script.
cat "$backuptab" | grep -v '^#\|^$' | while read line; do
        source=$( echo "$line" | awk '{print $1}' )
        target=$( echo "$line" | awk '{print $2}' )
        time=$( echo $line | awk '{print $3}' )
        snapshot=$( echo $line | awk '{print $4}' )

        "$backup_script" "$source" "$target" "$time" "$snapshot"

        echo
done

echo "Backup done."