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Re: Setuid programs
From: |
Christopher Lemmer Webber |
Subject: |
Re: Setuid programs |
Date: |
Wed, 09 Sep 2020 15:00:12 -0400 |
User-agent: |
mu4e 1.4.12; emacs 26.3 |
Maxim Cournoyer writes:
> Hello Gabor!
>
> Gábor Boskovits <boskovits@gmail.com> writes:
>
>> Hello guix,
>>
>> I would like to propose an extension to how setuid programs are
>> currently handled. The last time I checked it could only do setuid and
>> setgid root. Some services, such as postfix need a more fine grained
>> setuid setup. I would propose a record type, such as:
>> (setuid
>> (program setuid-program)
>> (setuid setuid-setuid)
>> (setgid setuid-setgid)
>> (user setuid-user)
>> (group setuid-group))
>>
>> So that there is more fine grained control.
>>
>> I would also propose to move this to the services framework, so that
>> services could extend this field on demand.
>>
>> Wdyt?
>
> This sounds great! I also encountered such limitation and tried to
> fixing it in https://issues.guix.info/41763, with some success (and an
> unresolved limitation pointed by Chriistopher) but I agree that using a
> record makes more sense and is more future proof.
>
> Maxim
I'm eager to use Postfix on Guix (maybe it's me, but I just can't make
sense of the weird DSL that opensmtpd uses) so I guess if that's what's
necessary it already makes it a good idea.
However I don't fully understand the syntax of what you proposed. Let's
see if I can guess with a fake entry
#~(setuid
;; The program to run, from the shady package
(program (string-append #$shady "/bin/scaryfoo")
;; Would this be a boolean? If so should it be `setuid?`
(setuid setuid-setuid)
;; Likewise?
(setgid setuid-setgid)
;; Presumably the use we want to set this to
(user setuid-user)
;; Presumably the group we want to se this to
(group setuid-group))
... right?
I guess this could be done in a backwards compatible way;
%setuid-programs could either evaluate to strings or records, so the
"simpler" version can remain an option?
- Chris
- Re: Setuid programs,
Christopher Lemmer Webber <=
- Re: Setuid programs, Gábor Boskovits, 2020/09/09
- Re: Setuid programs, Christopher Lemmer Webber, 2020/09/09
- Re: Setuid programs, Christopher Lemmer Webber, 2020/09/09
- Re: Setuid programs, Gábor Boskovits, 2020/09/10
- Re: Setuid programs, Christopher Lemmer Webber, 2020/09/10
- Re: Setuid programs, Ludovic Courtès, 2020/09/16
- Re: Setuid programs, Gábor Boskovits, 2020/09/16