New answers tagged process
1
Running Emacs in server-mode, you can use emacsclient to execute lisp code in that Emacs process. This makes it relatively simple to find out the file name of the currently selected window:
emacsclient -e '(buffer-file-name (window-buffer (selected-window)))'
You may need to add some more logic to deal with the case where your active window isn't visiting ...
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