Emacs: How to show the current directory in the frame bar?

Question

When opening a file in Emacs on Mac OS X, the file's path is displayed in the window bar (this bar at the upper end of the window which contains the three buttons for quitting, maximizing and minimizing). If I have a shell open (C-c s), it only displays *shell* -- not very useful, especially if there are multiple shells open. How can I display the path of the current working directory in the window bar? So, for example, /ssh:[email protected].

Answer 1

Try this:

(setq frame-title-format '((:eval default-directory)))