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From: Paul Eggert <eggert@cs.ucla.edu>
To: Phil Sainty <psainty@orcon.net.nz>
Cc: Emacs Development <Emacs-devel@gnu.org>
Subject: Re: Questions about XDG_RUNTIME_DIR and server-socket-dir
Date: Sat, 2 Feb 2019 22:10:24 -0800	[thread overview]
Message-ID: <32b703fc-e89c-23c3-cf21-74b4af6640f1@cs.ucla.edu> (raw)
In-Reply-To: <dac832f4-39cb-bb8f-cb79-631b502a0a9b@orcon.net.nz>

Phil Sainty wrote:

> I don't know about XDG_RUNTIME_DIR.  Does that get
> used in ways that rely upon its path never changing?

XDG_RUNTIME_DIR is a per-user-login directory that is like TMPDIR except without 
some of the security problems of TMPDIR (e.g., an attacker can create a symlink 
in TMPDIR to some victim location). That is, XDG_RUNTIME_DIR is accessible only 
to you, whereas TMPDIR traditionally is world-accessible. Also, 
XDG_RUNTIME_DIR's lifetime is intended to be just while the user is logged in. 
For more, please see:

https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html

I don't see the harm in changing it, if each new setting is intended to 
correspond to a different user login. That might be simpler than adding yet 
another environment variable.



  parent reply	other threads:[~2019-02-03  6:10 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-03  5:21 Questions about XDG_RUNTIME_DIR and server-socket-dir Phil Sainty
2019-02-03  6:01 ` Eli Zaretskii
2019-02-03  9:18   ` Phil Sainty
2019-02-03 11:21     ` Eli Zaretskii
2019-02-03 21:12       ` Phil Sainty
2019-02-04  3:30         ` Eli Zaretskii
2019-02-04  4:10           ` Stefan Monnier
2019-02-04  5:06           ` Phil Sainty
2019-02-03  6:10 ` Paul Eggert [this message]
2019-02-03  8:41   ` Phil Sainty
2019-02-03 16:42     ` Paul Eggert
2019-02-04 12:49   ` Ulrich Mueller

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