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 - create version file on clean machine
 - add condition to check wheter update is running
 - improve readability

#!/usr/local/bin/bash

# Use config file instead of editing script itself
source netupdate.conf

# Set some variables
LOCK=/var/run/mssupdate.lock
LOCALVERSION=`cat /var/lib/mss/version`

# Get apropriate programm version and full path to it from fileserver
VERSION=`ssh $USER@$SERVER grep $NAME $HOSTLIST |awk '{print $2}'`
UPDATEDIR=`ssh $USER@$SERVER grep $NAME $HOSTLIST |awk '{print $3}'`

# Add version file if it's missing (useful on clean systems)
if [ ! -e /var/lib/mss/version ]; then
	echo "0.0" > /var/lib/mss/version
fi

# Check whether we have latest version
if [ "$(echo "$LOCALVERSION < $VERSION" |bc -l )" -eq 1 ] && [ ! -e $LOCK ]; then
	echo "Starting update..."
	touch $LOCK
	rsync -Hacvx --exclude-from=/var/lib/mss/rsync-exclude $USER@$SERVER:$UPDATEDIR/$VERSION/ /var/lib/mss
	rsync -Hacvx --exclude-from=/var/lib/mss/rsync-exclude $USER@$SERVER:$UPDATEDIR/music /var/lib/mss/
	echo "Updated from $LOCALVERSION to $VERSION"
	echo $VERSION > /var/lib/mss/version
	ssh $USER@$SERVER echo "`date` $NAME updated from $LOCALVERSION to $VERSION" >> $UPDATEDIR/update.log
	rm -f $LOCK
elif [ "$(echo "$LOCALVERSION < $VERSION" |bc -l )" -eq 1 ] && [ -e $LOCK ]
	echo "Update is running..."
else
	echo "Version $LOCALVERSION is already installed"
fi





# Debug
echo $USER $SERVER $NAME $UPDATEDIR $VERSION $LOCALVERSION $HOSTLIST