scap: Don't run if scap is already running

tree/.local/bin/scap

@@ -5,6 +5,11 @@ if [ "$XDG_SESSION_TYPE" != "wayland" ]; then
 	exit 1
 fi
 
+if ps -e | grep "slurp"; then
+	echo "slurp is already running"
+	exit 1
+fi
+
 DIMS="$(slurp)"
 
 grim -g "$DIMS" - | pbc