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Emacs: Determine location in file

Say I've been browsing a source file in emacs and I've noticed something that I'd like to bring to the attention of a colleague. Is there an easy way (i.e. command) to get the file name and location of the point, e.g. if I'm on line 21 in foo.cpp

c:\temp\foo.cpp:21
Solution

  • This function does what you want. It displays the information as a message, and adds it to the kill-ring (for easy pasting).

    (defun get-file-line ()
  "show (and set kill-ring) current file and line"
  (interactive)
  (unless (buffer-file-name)
    (error "No file for buffer %s" (buffer-name)))
  (let ((msg (format "%s:%d"
                     (file-truename (buffer-file-name))
                     (line-number-at-pos))))
    (kill-new msg)
    (message msg)))