From 02a386b56818333a160b876cc9049341bdcb45b4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Wagner?= <rwagner@rw-net.de>
Date: Thu, 5 Nov 2020 14:42:45 +0100
Subject: [PATCH] check if file served as cgi is executable

if not, send a response 50 to the client
fixes ~sircmpwn/gmni#47
---
 src/serve.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/serve.c b/src/serve.c
index 459901e..8f5a39f 100644
--- a/src/serve.c
+++ b/src/serve.c
@@ -457,6 +457,12 @@ serve_request(struct gmnisrv_client *client)
 			assert(s != -1);
 			strcpy(real_path, temp_path);
 		} else if (S_ISREG(st.st_mode)) {
+			if (route->cgi && access(real_path, X_OK)) {
+				client_submit_response(client,
+					GEMINI_STATUS_PERMANENT_FAILURE, "Internal Server Error", NULL);
+				return;
+			}
+
 			break;
 		} else {
 			// Don't serve special files