From 96f3f685e4114c44555e7ffad7702dd141d8ca49 Mon Sep 17 00:00:00 2001
From: zakk4223 <zakk@rsdio.com>
Date: Mon, 12 Feb 2024 12:31:12 -0500
Subject: [PATCH] Don't leak /dev/null file descriptor (#874)

---
 cfg.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/cfg.cpp b/cfg.cpp
index 333b20e..d52bf46 100644
--- a/cfg.cpp
+++ b/cfg.cpp
@@ -409,7 +409,15 @@ static void ini_parse(int alt, const char *vmode)
 	int eof;
 
 	if (!orig_stdout) orig_stdout = stdout;
-	if(!dev_null) dev_null = fopen("/dev/null", "w");
+	if(!dev_null)
+	{
+		dev_null = fopen("/dev/null", "w");
+		if (dev_null) {
+			int null_fd = fileno(dev_null);
+			if (null_fd >= 0) fcntl(null_fd, F_SETFD, FD_CLOEXEC);
+		}
+	}
+
 
 	ini_parser_debugf("Start INI parser for core \"%s\"(%s), video mode \"%s\".", user_io_get_core_name(0), user_io_get_core_name(1), vmode);