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From: Natanael Copa <ncopa@alpinelinux.org>
To: Rich Felker <dalias@libc.org>
Cc: musl@lists.openwall.com
Subject: Re: musl 1.0.x branch
Date: Tue, 10 Jun 2014 23:25:06 +0200	[thread overview]
Message-ID: <20140610232506.7f9558c2@ncopa-laptop> (raw)
In-Reply-To: <20140610160356.GL179@brightrain.aerifal.cx>

On Tue, 10 Jun 2014 12:03:56 -0400
Rich Felker <dalias@libc.org> wrote:

> FYI you can emulate the usefulness of suid, without the danger, by
> having a daemon on a unix socket that you connect to which provides
> the functionality. This is a vastly superior design because there is
> exactly one input channel to the code running with elevated privileges
> (the socket) as opposed to unboundedly many (environment, open fds,
> resource limits, working directory, priority, signal mask and
> dispositions, cpu affinity, ... and whatever else the kernel folks add
> in the future).

You probably knew but this is what OpenBSD does instead of suid + PAM:
http://en.wikipedia.org/wiki/BSD_Authentication

I have always liked this approach.

-nc


  parent reply	other threads:[~2014-06-10 21:25 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-06-06 17:56 Rich Felker
2014-06-06 19:39 ` u-igbb
2014-06-07  6:23   ` Kevin Bortis
2014-06-07 13:16 ` Anthony G. Basile
2014-06-07 18:26 ` Gustavo Zacarias
2014-06-09  9:23 ` Natanael Copa
2014-06-09 20:08   ` Rich Felker
2014-06-10  9:43     ` u-igbb
2014-06-10 16:03       ` Rich Felker
2014-06-10 16:50         ` Laurent Bercot
2014-06-10 17:37           ` Rich Felker
2014-06-10 19:19             ` Laurent Bercot
2014-06-10 21:01               ` Rich Felker
2014-06-11  1:27                 ` Laurent Bercot
2014-06-10 20:32         ` u-igbb
2014-06-10 21:51           ` Rich Felker
2014-06-11 10:24             ` u-igbb
2014-06-11 13:09               ` Rich Felker
2014-06-11 14:37                 ` u-igbb
2014-06-10 21:25         ` Natanael Copa [this message]
2014-06-10 21:13           ` musl 1.0.x branch -- OT u-igbb
2014-06-10 21:55           ` musl 1.0.x branch Rich Felker
2014-06-11 10:41 ` Oliver Schneider
2014-06-11 13:16   ` Rich Felker
2014-06-12 18:46     ` Oliver Schneider
2014-06-13  1:23       ` Rich Felker

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