From 325a2eb8e2c520d312eb2d064fa000c0c1354e12 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fredrik=20=C3=96hrstr=C3=B6m?= <oehrstroem@gmail.com>
Date: Wed, 16 Aug 2023 16:44:48 +0200
Subject: [PATCH] Only print help if no arguments given and stdin is a tty.

---
 rtl_wmbus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rtl_wmbus.c b/rtl_wmbus.c
index a8208a3..f026700 100644
--- a/rtl_wmbus.c
+++ b/rtl_wmbus.c
@@ -1175,7 +1175,7 @@ int main(int argc, char *argv[])
     #if WINDOWS_BUILD == 1
     _setmode(_fileno(stdin), _O_BINARY);
     #else
-    if (isatty(0))
+    if (isatty(0) && argc == 1)
     {
         // Standard input is a terminal, print help.
         print_usage(argv[0]);