2 files changed, 10 insertions, 3 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 89fd026d647..ed0b3fcc7e5 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2008-02-25  Roland Winkler  <Roland.Winkler@physik.uni-erlangen.de>
+
+        * ibuffer.el (ibuffer-do-toggle-read-only): New optional arg as in
+        toggle-read-only.
+
 2008-02-25  Stefan Monnier  <monnier@iro.umontreal.ca>
 
         * doc-view.el (doc-view-conversion-buffer): Give it an internal name.
diff --git a/lisp/ibuffer.el b/lisp/ibuffer.el
index 59f8c96af2e..e3cd51af373 100644
--- a/lisp/ibuffer.el
+++ b/lisp/ibuffer.el
@@ -1257,11 +1257,13 @@ a new window in the current frame, splitting vertically."
    :modifier-p t)
   (set-buffer-modified-p (not (buffer-modified-p))))
 
-(define-ibuffer-op ibuffer-do-toggle-read-only ()
-  "Toggle read only status in marked buffers."
+(define-ibuffer-op ibuffer-do-toggle-read-only (&optional arg)
+  "Toggle read only status in marked buffers.
+With ARG, set read-only iff arg is positive."
   (:opstring "toggled read only status in"
+   :interactive "P"
    :modifier-p t)
-  (toggle-read-only))
+  (toggle-read-only arg))
 
 (define-ibuffer-op ibuffer-do-delete ()
   "Kill marked buffers as with `kill-this-buffer'."