session.sh: backup rather than clearing existing session file

diff --git a/examples/scripts/session.sh b/examples/scripts/session.sh
index 6d2a64d..e2642c7 100755 (executable)
--- a/examples/scripts/session.sh
+++ b/examples/scripts/session.sh
@@ -44,7 +44,7 @@ case $act in
     ;;
 
   "endsession" )
-    echo -n "" > "$sessionfile"
+    mv "$sessionfile" "$sessionfile~"
     for fifo in $fifodir/uzbl_fifo_*; do
       if [ "$fifo" != "$thisfifo" ]; then
         echo "spawn $scriptfile endinstance" > "$fifo"