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Groups > linux.debian.user > #193173

Re: Origin of /var/run contents

From Don Armstrong <don@debian.org>
Newsgroups linux.debian.user
Subject Re: Origin of /var/run contents
Date 2018-02-27 19:20 +0100
Message-ID <vnS14-8Z-9@gated-at.bofh.it> (permalink)
References <vnR50-7Wf-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Tue, 27 Feb 2018, Gene Heskett wrote:
> Just curious Sven. Why was this not supplied as a manpage or
> something, as far back as wheezy?

It's pretty common knowledge that initscripts and systemd units which
don't run as root have to create temporary directories in /run to track
their pid files and sockets before they drop permissions.

> Didn't anyone think of the stuff that runs as a user?

Stuff that runs as a user should use that user's home directory. [I have
a ~/var/ for this purpose, but other things use environmental variables
or ~/.something/foopid or similar.]

On Tue, 27 Feb 2018, Gene Heskett wrote:
> Neither jessie nor stretch have a manpage for systemd.tmpfiles.

It's systemd-tmpfiles(8) and tmpfiles.d(5).

> And how does that work when /run is a link to /var/run? and it doesn't
> work thru links. Confusing without a lot more study.

It's the other way around. /var/run should be a symlink to /run, which
is a temporary filesystem which goes away on reboot. [It's this way
because /var is sometimes a separate filesystem, and pid files need to
be written at early boot before /var is mounted.]

On Tue, 27 Feb 2018, Gene Heskett wrote:
> I have no clue why the /log and /run directory's are root only, but
> its for sure a PITA. And the "genius" who decreed that has yet to
> surface and offer an explanation.

They're root only because otherwise someone could write 1 to something
like /run/apache2/apache2.pid and watch as your apache2 init script tried to
kill off init. Or something more original and evil.

-- 
Don Armstrong                      https://www.donarmstrong.com

[M]en and nations do behave wisely once they have exhausted all other
alternatives.
 -- Abba Ebban

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Origin of /var/run contents Dave Sherohman <dave@sherohman.org> - 2018-02-27 12:10 +0100
  Re: Origin of /var/run contents "Martin S. Weber" <Ephaeton@gmx.net> - 2018-02-27 12:50 +0100
    Re: Origin of /var/run contents Dave Sherohman <dave@sherohman.org> - 2018-02-27 14:00 +0100
    Re: Origin of /var/run contents Gene Heskett <gheskett@shentel.net> - 2018-02-27 18:50 +0100
      Re: Origin of /var/run contents "Martin S. Weber" <Ephaeton@gmx.net> - 2018-02-27 19:30 +0100
        Re: Origin of /var/run contents Gene Heskett <gheskett@shentel.net> - 2018-02-27 19:40 +0100
          Re: Origin of /var/run contents Gene Heskett <gheskett@shentel.net> - 2018-02-27 19:50 +0100
          Re: Origin of /var/run contents Greg Wooledge <wooledg@eeg.ccf.org> - 2018-02-27 19:50 +0100
            Re: Origin of /var/run contents Sven Joachim <svenjoac@gmx.de> - 2018-02-27 20:00 +0100
        Re: Origin of /var/run contents Sven Hartge <sven@svenhartge.de> - 2018-02-27 20:10 +0100
        Re: Origin of /var/run contents David Wright <deblis@lionunicorn.co.uk> - 2018-02-27 20:30 +0100
          Re: Origin of /var/run contents "Martin S. Weber" <Ephaeton@gmx.net> - 2018-02-27 21:00 +0100
            Re: Origin of /var/run contents David Wright <deblis@lionunicorn.co.uk> - 2018-02-28 01:20 +0100
        Re: Origin of /var/run contents Mart van de Wege <mvdwege@gmail.com> - 2018-02-27 22:20 +0100
          Re: Origin of /var/run contents Sven Hartge <sven@svenhartge.de> - 2018-02-28 09:50 +0100
            Re: Origin of /var/run contents Mart van de Wege <mvdwege@gmail.com> - 2018-02-28 12:50 +0100
  Re: Origin of /var/run contents Sven Hartge <sven@svenhartge.de> - 2018-02-27 12:50 +0100
    Re: Origin of /var/run contents Gene Heskett <gheskett@shentel.net> - 2018-02-27 18:20 +0100
      Re: Origin of /var/run contents Don Armstrong <don@debian.org> - 2018-02-27 19:20 +0100
        Re: Origin of /var/run contents Gene Heskett <gheskett@shentel.net> - 2018-02-27 19:30 +0100
        Re: Origin of /var/run contents Sven Hartge <sven@svenhartge.de> - 2018-02-27 20:10 +0100
      Origin of /var/run contents Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2018-03-03 17:40 +0100
        Re: Origin of /var/run contents Gene Heskett <gheskett@shentel.net> - 2018-03-03 18:20 +0100
          Re: Origin of /var/run contents Greg Wooledge <wooledg@eeg.ccf.org> - 2018-03-05 16:10 +0100
            Origin of /var/run contents Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2018-03-07 00:50 +0100
              Re: Origin of /var/run contents deloptes <deloptes@gmail.com> - 2018-03-07 08:00 +0100
              Re: Origin of /var/run contents Greg Wooledge <wooledg@eeg.ccf.org> - 2018-03-07 14:40 +0100
  Re: Origin of /var/run contents Gene Heskett <gheskett@shentel.net> - 2018-02-27 18:10 +0100
  Re: Origin of /var/run contents Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2018-03-03 16:50 +0100

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