From 42837a5b3c79bbd445cd797a684f997ed0448d41 Mon Sep 17 00:00:00 2001
From: christos <christos@NetBSD.org>
Date: Thu, 15 Nov 2012 03:50:36 +0000
Subject: [PATCH] Add 'x' to the mode bits to specify O_EXCL, like glibc.

---
 lib/libc/stdio/flags.c |  8 ++++++--
 lib/libc/stdio/fopen.3 | 10 ++++++++--
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/lib/libc/stdio/flags.c b/lib/libc/stdio/flags.c
index 1892d02e5e81..eac46f9a41ae 100644
--- a/lib/libc/stdio/flags.c
+++ b/lib/libc/stdio/flags.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: flags.c,v 1.16 2012/03/15 18:22:30 christos Exp $	*/
+/*	$NetBSD: flags.c,v 1.17 2012/11/15 03:50:36 christos Exp $	*/
 
 /*-
  * Copyright (c) 1990, 1993
@@ -37,7 +37,7 @@
 #if 0
 static char sccsid[] = "@(#)flags.c	8.1 (Berkeley) 6/4/93";
 #else
-__RCSID("$NetBSD: flags.c,v 1.16 2012/03/15 18:22:30 christos Exp $");
+__RCSID("$NetBSD: flags.c,v 1.17 2012/11/15 03:50:36 christos Exp $");
 #endif
 #endif /* LIBC_SCCS and not lint */
 
@@ -90,6 +90,7 @@ __sflags(const char *mode, int *optr)
 	 * [rwa]\+ or [rwa]b\+ means read and write 
 	 * f means open only plain files,
 	 * e means set close on exec.
+	 * x means exclusive open.
 	 */
 	for (; *mode; mode++)
 		switch (*mode) {
@@ -103,6 +104,9 @@ __sflags(const char *mode, int *optr)
 		case 'e':
 			o |= O_CLOEXEC;
 			break;
+		case 'x':
+			o |= O_EXCL;
+			break;
 		case 'b':
 			break;
 		default:	/* We could produce a warning here */
diff --git a/lib/libc/stdio/fopen.3 b/lib/libc/stdio/fopen.3
index ec6db64356ae..d74b904065d3 100644
--- a/lib/libc/stdio/fopen.3
+++ b/lib/libc/stdio/fopen.3
@@ -1,4 +1,4 @@
-.\"	$NetBSD: fopen.3,v 1.28 2012/07/02 20:02:43 wiz Exp $
+.\"	$NetBSD: fopen.3,v 1.29 2012/11/15 03:50:36 christos Exp $
 .\"
 .\" Copyright (c) 1990, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -33,7 +33,7 @@
 .\"
 .\"     @(#)fopen.3	8.1 (Berkeley) 6/4/93
 .\"
-.Dd July 18, 2011
+.Dd November 14, 2012
 .Dt FOPEN 3
 .Os
 .Sh NAME
@@ -117,6 +117,12 @@ will fail.
 This is a non
 .St -ansiC
 extension.
+.It Sq x
+The letter
+.Sq x
+in the mode turns on exclusive open mode to the file (
+.Dv O_EXCL )
+which means that the file will not be created if it already exists.
 .El
 .Pp
 Any created files will have mode