Fix losetup -r flag when we specify 'w!' for the disk mode.

From: Zhigang Wang <zhigang.x.wang@oracle.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

diff --git a/tools/examples/block b/tools/examples/block
index f946784f033211f9eab917a03018beefdad52de2..56c26789a5013257a70309b0da5615edfbd88d4c 100644 (file)
--- a/tools/examples/block
+++ b/tools/examples/block
@@ -329,7 +329,7 @@ mount it read-write in a guest domain."
 
         if LANG=C losetup -h 2>&1 | grep read-only >/dev/null
         then
-          roflag="-$mode"; roflag="${roflag#-w}"
+          roflag="-$mode"; roflag="${roflag#-w}"; roflag="${roflag#-!}"
         else
           roflag=''
         fi