From c4f895d86b2359206afb8ab0acfc0f748de95eb8 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Thu, 27 Jan 2022 12:02:27 +0100
Subject: [PATCH] Do not crash when run with argc == 0

---
 suidgw.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/suidgw.c b/suidgw.c
index 47885f6..43e3394 100644
--- a/suidgw.c
+++ b/suidgw.c
@@ -1,7 +1,7 @@
 /*
  *  A simple gateway for set-uid scripts
  *
- *  (c) 2013 Martin Mares <mj@ucw.cz>
+ *  (c) 2013-2022 Martin Mares <mj@ucw.cz>
  */
 
 #undef DEBUG
@@ -85,6 +85,9 @@ static void sanitize_env(void)
 
 static void get_script_name(const char *arg0)
 {
+  if (!arg0)
+    die("Program name must be given");
+
   // If arg0 is a path, extract the last component
   const char *p = strrchr(arg0, '/');
   if (p)
-- 
2.39.2