From: Paul Eggert <eggert@cs.ucla.edu>
Date: Sat, 7 Mar 2020 19:58:20 +0000 (-0800)
Subject: Update from Gnulib
X-Git-Tag: emacs-28.0.90~7791
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=9f4b260c2b98ea05a02e0ab7213156ce2e60e5a9;p=emacs.git

Update from Gnulib

This incorporates:
2020-03-07 open, openat: port to (O_RDWR | O_RDONLY) != 0
* lib/open.c: Copy from Gnulib.
---

diff --git a/lib/open.c b/lib/open.c
index 487194f6652..bb180fde292 100644
--- a/lib/open.c
+++ b/lib/open.c
@@ -110,7 +110,9 @@ open (const char *filename, int flags, ...)
          directories,
        - if O_WRONLY or O_RDWR is specified, open() must fail because the
          file does not contain a '.' directory.  */
-  if (flags & (O_CREAT | O_WRONLY | O_RDWR))
+  if ((flags & O_CREAT)
+      || (flags & O_ACCMODE) == O_RDWR
+      || (flags & O_ACCMODE) == O_WRONLY)
     {
       size_t len = strlen (filename);
       if (len > 0 && filename[len - 1] == '/')