unison_exe="/usr/bin/unison"
tmp_file=$(mktemp)
res=$(${unison_exe} -batch > ${tmp_file} 2>&1)
grep "Nothing to do: replicas have not changed since last sync" ${tmp_file} > /dev/null
file_sync=$?

if [ ! $file_sync == 0 ];
then
	echo $(more ${tmp_file})
fi