1 files changed, 7 insertions, 1 deletions
diff --git a/nawp.scm b/nawp.scm
index 5bc6f07..86d683a 100755
--- a/nawp.scm
+++ b/nawp.scm
@@ -346,8 +346,14 @@
     (print "If this program is called without arguments, it operates in CGI mode.\n")))
 
 (define (main)
+  (when
+      (and
+       (get-environment-variable "GATEWAY_INTERFACE")
+       (not (null? (command-line-arguments))))
+    (http-fail 400 "Bad request.")
+    (exit 1))
   (match (command-line-arguments)
-    (() (when (get-environment-variable "GATEWAY_INTERFACE") (cgi-main)))
+    (() (cgi-main))
     ((adduser username display-name)
       (add-user username (read-password "Password: ") display-name))
     (everything-else (help))))