bu

#!/usr/bin/env rc

test $BACKUPDIR || BACKUPDIR=/usr/local/backup/$USER
test $BACKUPDEST || BACKUPDEST=regenfus@lxhalle.in.tum.de:/u/halle/regenfus/home_at/backup

cd $BACKUPDIR

name=`{date '+%Y-%m-%d.tar.gz'}
last=`{stat --format'=%Y %n' * | sort -n | awk 'END { print($2) }'}
month=`{date '+%m'}
lastmonth=`{printf '%s\n' $last | sed 's/^[0-9]\+-\([0-9]\+\).*/\1/'}

if(test -f $name.enc)
	exit 0
if(test -f $name) {
	~ `{date +'%Y-%m-%d'} `{stat --format'=%y' $name | awk '{ print($1) }'} && exit 0
	rm $name
}
if(test -d tmp/){
	~ `{date '+%Y-%m-%d'} `{stat --format'=%y' tmp/ | awk '{ print($1) }'} && exit 0
	rm -rf tmp/
}

mkdir tmp

if(! ~ $month $lastmonth)
	cp -R $HOME/* tmp/
if not
	cgdc $BACKUPDIR/$last $HOME/ $BACKUPDIR/tmp/

test -f tmp/.gnupg/random_seed && rm tmp/.gnupg/random_seed

cd tmp
tar -czf $name *
mv $name ..
cd ..
rm -rf tmp
chmod 0600 $name
fenc e '!'^`{spm show backup} $name $name.enc
rm $name
scp $name.enc $BACKUPDEST