#/bin/bash
#
# remote_backup.sh  
#
# Script to backup system to remote drive
# To decrypt: "gpg --output backup.tar.bz --decrypt backup.tbz"
# To uncompress: "tar -xvjf backup.tar.bz"
# http://www.braggtown.com

USER_HOME="/home/bubba"
REMOTEDIR="/mnt/h"
COPY="cp -a"			# Add v flag for verbose copying eg, "cp -av"
ARCHIVE="tar -cjf "		# Use tar and compress with bzip2 (add v flag for verbose operation)
GPGADDRESS="bubba@prairienet.org"
				# Append items to be archived to this list.  Mind the quotation marks
FILES="$USER_HOME/.mozilla/firefox/*.default
$USER_HOME/.mozilla-thunderbird/*.default
$USER_HOME/.gaim 
$USER_HOME/.ssh
$USER_HOME/.gnupg
$USER_HOME/.scripts
$USER_HOME/.tomboy
$USER_HOME/.bash_aliases
$USER_HOME/Documents/work
/etc/hosts*
/etc/apache2/httpd.conf.local
/etc/apache2/apache2.conf"

				# If file/directory exists, append to list, else notify user
for file in $FILES
  do
    if [ -e $file ]; then
      FILE_LIST="$file $FILE_LIST"
    else
      echo "$file doesn't exist"
    fi 
  done
				# Create tar file and compress with bzip2, which is slower but compresses farther
echo "Creating and compressing tar file"
$ARCHIVE $USER_HOME/backup.tbz $FILE_LIST

				# Use Gnupg to encrypt backup.  Comment out next 3 lines if not using encryption.
gpg -q -r $GPGADDRESS -e $USER_HOME/backup.tbz
echo "Backup encrypted"
				# rename *.tbz.gpg to *.tbz so as to not attract attention to use of encryption
mv $USER_HOME/backup.tbz.gpg $USER_HOME/backup.tbz



				# Mount remote drive to filesystem (will fail if unable to mount)
$USER_HOME/.scripts/mount-common.sh
echo "Mounted remote drive"

				#Check for existance of previous backups	
if [ -e $REMOTEDIR/backup.tbz ]
then	
	echo "Existing backup discovered. Moving backup to backup2..."
	mv $REMOTEDIR/backup.tbz $REMOTEDIR/backup2.tbz
	
else 
	echo "No existing backup."
fi

	
				# Copy backup to remote drive
$COPY $USER_HOME/backup.tbz $REMOTEDIR/
				# Compare copy to original to confirm copy was successful
cmp -s $USER_HOME/backup.tbz $REMOTEDIR/backup.tbz 
if [ $? -eq 0 ] 		# Remove local archive and older copy on remote drive to conserve space
then echo "Move to remote drive successful!"  && rm -rf $USER_HOME/backup.tbz && rm -rf $REMOTEDIR/backup2.tbz
else echo "Move to remote drive unsuccessful!"  && $USER_HOME/.scripts/unmount-common.sh && exit 1
fi

$USER_HOME/.scripts/unmount-common.sh
echo "Unmounted remote drive"
echo "Backup Complete"
exit 0