From 2a729c92d6b9584bb96fc25959da97c5e923f84a Mon Sep 17 00:00:00 2001
From: Gerd Moellmann <gerd@gnu.org>
Date: Fri, 9 Mar 2001 12:38:54 +0000
Subject: [PATCH] (Fwrite_region) [DOS_NT]: Remove O_TRUNC from open flags
 argument to emacs_open; it seems to conflict with O_EXCL.

---
 src/fileio.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/fileio.c b/src/fileio.c
index dc087873988..fb40e549710 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -4684,8 +4684,8 @@ This does code conversion according to the value of\n\
 #else /* not VMS */
 #ifdef DOS_NT
   desc = emacs_open (fn,
-		     O_WRONLY | O_TRUNC | O_CREAT | buffer_file_type
-		     | (mustbenew == Qexcl ? O_EXCL : 0),
+		     O_WRONLY | O_CREAT | buffer_file_type
+		     | (EQ (mustbenew, Qexcl) ? O_EXCL : O_TRUNC),
 		     S_IREAD | S_IWRITE);
 #else  /* not DOS_NT */
   desc = emacs_open (fn, O_WRONLY | O_TRUNC | O_CREAT
-- 
2.30.2