[src/trunk]: src/lib/libc/stdio apply an 11 years old fix from FreeBSD:

[drochner <drochner%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/fd15c61de995
branches:  trunk
changeset: 757663:fd15c61de995
user:      drochner <drochner%NetBSD.org@localhost>
date:      Fri Sep 10 10:29:23 2010 +0000

description:
apply an 11 years old fix from FreeBSD:
if EBADF is returned due to a read from a write-only stream, also
set ferror()
found by a selftest of Python-2.6.6, thanks to obache for pointing
out the details

diffstat:

 lib/libc/stdio/refill.c |  5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diffs (26 lines):

diff -r 329d7da6e210 -r fd15c61de995 lib/libc/stdio/refill.c
--- a/lib/libc/stdio/refill.c   Fri Sep 10 10:23:46 2010 +0000
+++ b/lib/libc/stdio/refill.c   Fri Sep 10 10:29:23 2010 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: refill.c,v 1.13 2003/08/07 16:43:30 agc Exp $  */
+/*     $NetBSD: refill.c,v 1.14 2010/09/10 10:29:23 drochner Exp $     */
 
 /*-
  * Copyright (c) 1990, 1993
@@ -37,7 +37,7 @@
 #if 0
 static char sccsid[] = "@(#)refill.c   8.1 (Berkeley) 6/4/93";
 #else
-__RCSID("$NetBSD: refill.c,v 1.13 2003/08/07 16:43:30 agc Exp $");
+__RCSID("$NetBSD: refill.c,v 1.14 2010/09/10 10:29:23 drochner Exp $");
 #endif
 #endif /* LIBC_SCCS and not lint */
 
@@ -91,6 +91,7 @@
        if ((fp->_flags & __SRD) == 0) {
                if ((fp->_flags & __SRW) == 0) {
                        errno = EBADF;
+                       fp->_flags |= __SERR;
                        return (EOF);
                }
                /* switch to reading */