#!/bin/sh
#
#######################################
#
# TAR backup script to cover daily and weekly backups on one tape.
# Generic UNIX version - edit variables as required
#
# For this to work, it MUST be started on a Monday!
#
# Copyright (c) 1999, Tim Jones
# Permission granted for use/modification
#
# Tim Jones/Linux Magazine provide this shell script with no warranty
# (implied or otherwise)
#
########################################
DOW=`date +%w`
DATE=`date +%D`
DAY=`date +%A`
DEVICE="MY REWIND TAPE" # Rewinding tape drive
NDEVICE="MY NO_REWIND TAPE" # non-rewinding tape drive
REWIND="mt -f $DEVICE rewind"
EOD="mt -f $NDEVICE eod"
FSF="mt -f $NDEVICE fsf"
MAILLIST="root" # list of users to receive backup notice
if [ $DOW = "6" ]
then
# This is Saturday, so append and write the whole system!
$EOD
echo $DATE > /tmp/.LASTFULL
tar -cvvf $NDEVICE / >/tmp/backup.txt
$REWIND
$FSF 5
tar -dvf $NDEVICE >> /tmp/backup.txt
$REWIND
cp /tmp/.LASTFULL /etc/.LASTFULL
else
# this is not Saturday
case $DOW in
0)
# it's Sunday - nothing to do
exit 0
;;
1)
# Monday, Let the tape rewind for the difference verification
echo $DATE > /tmp/.LASTINC
tar -cvvf $DEVICE --newer `cat /etc/.LASTFULL` / >/tmp/backup.txt
cp /tmp/.LASTINC /etc/.LASTINC
;;
*)
# Other Days, must rewind manually and Inspect, -i
$EOD
echo $DATE >/tmp/.LASTINC
tar -cvvf $NDEVICE --newer `cat /etc/.LASTINC` / >/tmp/backup
$REWIND
$FSF `expr $DOW - 1`
echo "************ Verifying ${DAY}'s backup" >> /tmp/backup.txt
tar --dvf $NDEVICE >> /tmp/backup.txt
cp /tmp/.LASTINC /etc/.LASTINC
$REWIND
esac
fi
mail $MAILLIST < /tmp/backup.txt
rm -f /tmp/backup.txt
# END OF SCRIPT