file persistance fix

tests/file_persistance.py

@@ -0,0 +1,25 @@
+"""
+Description
+    Files can be written into world writable directories without being removed,
+    potentially leading to disk space exhaustion
+
+    Run this test twice and there should be no output
+
+"""
+
+import os
+
+directories = [
+    "/dev/shm",
+    "/run/lock",
+    "/tmp",
+    "/var/tmp"
+]
+
+for dir in directories:
+    fpath = f"{dir}/bean"
+    if os.path.exists(fpath):
+        print(f"{fpath} exists")
+    else:
+        with open(fpath, "w") as f:
+            f.write("beannn")