#! /bin/sh

# Back up another computer's drive to this system. To make this work, we
# need a convenient chunk of disk space on this computer. This version
# uses ssh to do its transfer, and compresses using bz2. This version was
# developed so that the system to be backed up won't be authenticated to
# log onto the backup computer. This script is intended to be used on a
# firewall. You don't want the firewall to be authenticated to the backup
# system in case the firewall is cracked.

# Time-stamp: <2004-04-03 12:24:12 ccurley get.tester>

# Copyright 2000 through the last date of modification Charles Curley.

# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.

# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.

# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

# You can also contact the Free Software Foundation at http://www.fsf.org/

# For more information contact the author, Charles Curley, at
# http://www.charlescurley.com/.

# 2004 04 03: added /sys to the list of excludes. It is a read-only
# pseudo-file system like /proc.

# 2002 07 01: We now set the path on the target to the zip drive with
# a variable. This fixes a bug in the command to eject the zip disk.

# 2002 07 01: The zip disk archives are now in bzip2 format, so this
# script has been changed to reflect that.



# The host name of the computer to be backed up.
target=tester
zip=/mnt/zip

echo Backing up $target

echo Aging the ZIP disk backups.

rm -r $target.old.zip

mv $target.zip $target.old.zip

ssh $target "modprobe ppa ; mount -r $zip"

echo Copying the ZIP disk.

# -r for recursive copy, -p to preserve times and permissions, -q for
# quiet: no progress meter.

scp -qpr $target:$zip $target.zip

du -hs $target.zip


echo Aging the archives

rm $target.tar.old.bz2

mv $target.tar.bz2 $target.tar.old.bz2


echo Backing up $target to the backup server.

ssh $target tar -cf - / --exclude /sys --exclude /mnt --exclude /proc\
    --exclude /var/spool/squid\
    | bzip2 -9 | cat > $target.tar.bz2

echo Testing the results.
find . -iname "*.bz2" | xargs bunzip2 -t

ssh $target "eject $zip"