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bug#36598: 26.1; (error "‘/tmp/emacs1000’ is not a safe directory becaus

From: Stefan Monnier
Subject: bug#36598: 26.1; (error "‘/tmp/emacs1000’ is not a safe directory because it is a symlink")
Date: Mon, 15 Jul 2019 09:04:22 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

>> Commit b663c837249 (in May) which says "Cosmetic changes" is the one
>> that introduced this code?
>>     (let ((olddir (or (getenv "TMPDIR") "/tmp")))
>>       (when (and (equal dir (format "%s/emacs" (getenv
>>                  (file-writable-p olddir))
>>         (let ((link (format "%s/emacs%d" olddir (user-uid))))
>>           (unless (file-directory-p link)
>>             ;; We're using the new location, so try and setup a symlink
>> from
>>             ;; the old location, in case we want to use an
>> old emacsclient.
>>             ;; FIXME: Check that it's safe to use!
>>             (make-symbolic-link dir link t)))))
>> And instead of making things work with an old emacsclient, it breaks the
>> Emacs 26 emacsclient?
> Nearly. I think it breaks emacs-26 not the emacsclient. I haven't check the
> emacsclient code, but I guess Stefan was
> aiming for the situation when someone is using (say) emacsclient-26 with
> emacs-27.

Indeed (it's Debian/s /usr/bin/emacsclient accessing my hand-built
Emacs-27 server).

>> Stefan, was this checked in by mistake?



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