From b7ce600d3d238ca3e82aa04ee6845afc45fb5eb8 Mon Sep 17 00:00:00 2001
From: Karel Zak
Date: Thu, 19 Nov 2009 15:56:12 +0100
Subject: mount: check for unsuccessful read-only bind mounts

Linux kernel allows to use MS_RDONLY together with MS_BIND,
unfortunately the MS_RDONLY is silently ignored and the target
mountpoint is still read-write. Then we have 'ro' in mtab and 'rw' in
/proc/mounts.

This patch checks for this situation by access(2) or futimens(2)
(change atime) and mtab is properly updated and user informed.

Reported-by: Terry Burton <tez@terryburton.co.uk>
Signed-off-by: Karel Zak <kzak@redhat.com>
---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index fc0b9e1b8..d0356fdb3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -145,6 +145,7 @@ AC_CHECK_DECLS([_NL_TIME_WEEK_1STDAY],[],[],[[#include <langinfo.h>]])
 
 AC_CHECK_FUNCS(
 	[inet_aton \
+	futimens \
 	fsync \
 	getdomainname \
 	get_current_dir_name \
-- 
cgit v1.2.3-55-g7522