From a07878be71aef8e59acadf01f0f18931ad382f6b Mon Sep 17 00:00:00 2001
From: Feoramund <161657516+Feoramund@users.noreply.github.com>
Date: Fri, 16 Aug 2024 14:03:56 -0400
Subject: [PATCH] Check if file open-mode is `O_CREATE` on Darwin before
 forcing chmod

Fixes #4087
---
 core/os/os_darwin.odin | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/os/os_darwin.odin b/core/os/os_darwin.odin
index 940c0294e..602257314 100644
--- a/core/os/os_darwin.odin
+++ b/core/os/os_darwin.odin
@@ -702,7 +702,7 @@ open :: proc(path: string, flags: int = O_RDWR, mode: int = 0) -> (handle: Handl
 		@INFO(Platin): this is only done because O_CREATE for some reason fails to apply mode
 		               should not happen if the handle is a directory
 	*/
-	if mode != 0 && !isDir {
+	if flags & O_CREATE != 0 && mode != 0 && !isDir {
 		err = fchmod(handle, cast(u16)mode)
 		if err != nil {
 			_unix_close(handle)