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 487194f6652bf24db218b0c3ae1ac16c02aef9d7..bb180fde2920b19ce5277f3322a9d123e0a91f85 100644 (file)
--- 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] == '/')