* files.el (find-file-existing): New function.

* menu-bar.el (menu-bar-files-menu): Make "Open File..." call
find-file-existing.  Add "New File..." that calls find-file.

* dired.el (dired-read-dir-and-switches): Call read-driectory-name
instead of read-file-name.

1 files changed, 8 insertions, 0 deletions

diff --git a/lisp/files.el b/lisp/files.el
index f10281a0d10..888f9dc81e9 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -977,6 +977,14 @@ expand wildcards (if any) and visit multiple files."
           (mapcar 'switch-to-buffer (cdr value)))
       (switch-to-buffer-other-frame value))))
 
+(defun find-file-existing (filename &optional wildcards)
+  "Edit the existing file FILENAME.
+Like \\[find-file] but only allow files that exists."
+  (interactive (find-file-read-args "Find existing file: " t))
+  (unless (file-exists-p filename) (error "%s does not exist" filename))
+  (find-file filename wildcards)
+  (current-buffer))
+
 (defun find-file-read-only (filename &optional wildcards)
   "Edit file FILENAME but don't allow changes.
 Like \\[find-file] but marks buffer as read-only.