From 0ecfba4585eebc41f2fc6f6287818be9ca6ab4dd Mon Sep 17 00:00:00 2001
From: Alex Campbell <alex.campbell@nasa.gov>
Date: Tue, 1 Dec 2020 10:34:57 -0500
Subject: [PATCH] fix #650 OS_chmod uses read or write access.

---
 src/os/portable/os-impl-posix-files.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/os/portable/os-impl-posix-files.c b/src/os/portable/os-impl-posix-files.c
index ba59fcba0..9fe58401a 100644
--- a/src/os/portable/os-impl-posix-files.c
+++ b/src/os/portable/os-impl-posix-files.c
@@ -202,7 +202,11 @@ int32 OS_FileChmod_Impl(const char *local_path, uint32 access)
     fd = open(local_path, O_RDONLY, 0);
     if (fd < 0)
     {
-        return OS_ERROR;
+        fd = open(local_path, O_WRONLY, 0);
+        if (fd < 0)
+        {
+            return OS_ERROR;
+        }        
     }
 
     /*