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bug#2211: server-socket-dir and make-temp-file

From: Stefan Monnier
Subject: bug#2211: server-socket-dir and make-temp-file
Date: Thu, 05 Feb 2009 14:51:02 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux)

> server-socket-dir is by default a directory in /tmp. With CVS emacs
> it also takes the TMPDIR environment variable into account.
> Shouldn't this variable be initialized using make-temp-file so that
> it obeys any customization of temporary-file-directory?

No, because emacsclient needs to access server-socket-dir but doesn't
read the .emacs so can't adapt to changes in temporary-file-directory
(it does pay attention to $TMPDIR, on the other hand).

> Actually, I ran the following command in the emacs directory
> $ grep "\"/tmp\"" lisp/*el lisp/*/*el
> Browsing through the matches, it seems to me that
> pmail-mime-attachment-dirs-alist and url-temporary-directory
> should be updated, too.

You're probably right on these ones.

> A related issue: I do not quite understand a piece of code like

>   (make-temp-file
>    (concat (file-name-as-directory
>             (or (getenv "TMPDIR") "/tmp"))
>             "artist-stdin."))

> used in the function artist-system. If the PREFIX arg of
> make-temp-file is an absolute directory as in the example above,
> make-temp-file will ignore any user customization of
> temporary-file-directory. The function ps-run-make-tmp-filename
> behaves similarly.

At first, I was going to say that

     (concat (file-name-as-directory
              (or (getenv "TMPDIR") "/tmp"))

should be replaced by

     (expand-file-name "artist-stdin." (or (getenv "TMPDIR") "/tmp"))

but indeed, it's better to just skip it all and let `make-temp-file' use


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