#!/bin/bash

set -e

MACHINE="$1"

REALM=NORTHERNPRINCIPLE.COM
PRINCIPAL=backup/`hostname`.`dnsdomainname`@$REALM

DATE=`date +%F-%H%M-%S` # no spaces allowed

if [ ! -f "$MACHINE"/exclude ]; then
	echo "$MACHINE/exclude not found. Are you sure you don't want a"
	echo "/proc entry in there? If not create an empty file."
	exit 1
fi

if [ ! -r "$MACHINE"/backup.keytab ]; then
	echo "$MACHINE"/backup.keytab does not exist
fi

export KRB5CCNAME=/tmp/krb5cc_$UID.backup
kinit -k -t "$MACHINE"/backup.keytab $PRINCIPAL

export RSYNC_RSH=ssh

cd "$MACHINE"
if [ -f last ]; then
	LAST=`cat last`
	LINKDEST="--link-dest ../$LAST"
else
	LINKDEST=""
fi
if [ -f fakeroot.environ ]; then
	FAKELOAD="-i fakeroot.environ"
else
	FAKELOAD=""
fi
fakeroot $FAKELOAD -s fakeroot.environ -- rsync -av --delete $LINKDEST --exclude-from=exclude root@"$MACHINE":/ $DATE/
echo -n "$DATE" > last