Async processes to be persistent even after exiting Emacs

Async processes to be persistent even after exiting Emacs

[Boruch Baum]

The standard built-in method that Emacs uses to spawn an asynchronous
processes doesn't enable those processes to survive the killing of their
process buffers, and certainly not to survive exiting emacs.

I've posted[1] a commit demonstrating a flexible method to optionally
circumvent those limitations. My use-case is my desire to be able to use
dired to open a file in an operating system's default external program
(ala xdg-open), and have that process persist even after exiting Emacs.


[1] https://github.com/Boruch-Baum/emacs-diredc/commit/a46b61817610e4ad3824b5a87393217f1b3cdd2c

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Re: Async processes to be persistent even after exiting Emacs

[Jean Louis]

* Boruch Baum <boruch_baum@gmx.com> [2021-04-22 23:16]:
> The standard built-in method that Emacs uses to spawn an asynchronous
> processes doesn't enable those processes to survive the killing of their
> process buffers, and certainly not to survive exiting emacs.

That is useful. I am launching software through Emacs and often those
programs should persist.

It would be good to have some prefix or similar command to make it
persist.

As a side note, not quite relate, but could be, some software I cannot
launch with M-! but it works with M-& -- example is rox and retext. It
is very unclear why is this happening, do you maybe know a reason?

For example this below does not work with `retext' editor neither M-!
retext works, but M-& retext does work.

(defun rcd-edit-with-external-editor ()
  (interactive)
  (let* ((buffer (current-buffer))
	 (text (buffer-substring-no-properties (point-min) (point-max)))
	 (mode major-mode)
	 (file (concat (or (getenv "TMPDIR") "/tmp/") "temp-file")))
    (string-to-file-force text file)
    (shell-command (format "retext %s" file))
    (erase-buffer)
    (insert (file-to-string file))
    (goto-char 0)))

If I use other GUI editor it does work.

-- 
Jean

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