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Date:      Sat, 22 May 2010 03:29:38 -0400
From:      jhell <jhell@dataix.net>
To:        Garrett Cooper <yanefbsd@gmail.com>
Cc:        ports@freebsd.org, RW <rwmaillists@googlemail.com>
Subject:   Re: Users and groups kept after a port deinstallation
Message-ID:  <4BF787E2.9010907@dataix.net>
In-Reply-To: <AANLkTim9NqCGi_iPMuoivw0z2bzEXHkt39VPk6c7aHyt@mail.gmail.com>
References:  <AANLkTindTvyrfPRj_cGWUC3LXWI63bGN5azaXo_xYRVu@mail.gmail.com> <AANLkTikNB0LbKG1qtL90F-thxeCvvSqnBxOCCDSucVS6@mail.gmail.com> <20100522005313.26dcfbdb@gumby.homeunix.com> <AANLkTim9NqCGi_iPMuoivw0z2bzEXHkt39VPk6c7aHyt@mail.gmail.com>

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On 05/21/2010 20:08, Garrett Cooper wrote:
> On Fri, May 21, 2010 at 4:53 PM, RW <rwmaillists@googlemail.com> wrote:
>> On Fri, 21 May 2010 16:23:18 +0100
>> Florent Thoumie <flz@xbsd.org> wrote:
>>
>>> On Fri, May 21, 2010 at 11:11 AM, David DEMELIER
>>> <demelier.david@gmail.com> wrote:
>>>> Hi,
>>>>
>>>> I used pkgsrc for a while on NetBSD. I was used to the pkgsrc
>>>> notifications about the users and groups leaves, when some ports are
>>>> removed these leaves are not used anymore. e.g pulseaudio needs some
>>>> users on the system.
>>>>
>>>
>>> This was discussed in the following bug-report:
>>>
>>> http://www.freebsd.org/cgi/query-pr.cgi?pr=108514
>>>
>>> I think the proper solution is to create a +UGIDS file to be able to
>>> maintain a refcount, but the status quo isn't that bad.
>>
>> Personally I'd much prefer to keep them so ls -l, filemanagers etc can
>> continue to use names rather than numbers for any files left behind.
>>
>> IMO the status quo is better than any solution that involves automated
>> deletion.
> 
>     I agree by and large with RW, but it would be nice if there was an
> audit tool to do this check and suggest whether or not a group should
> be added or removed in general, regardless of whether or not a
> pkg/port was added or removed.
> Thanks,
> -Garrett

find(1) is already used by periodic(1) through weekly_noid_enable which
should probably be extended to also include weekly_nogid_enable and
would ultimately alert you to users and groups that have gone missing
due to a port removal.

Having unused logins on a system is bad! and just for the case of
mapping to uid/gid does not justify leaving them. uid & gid printed in
ls(1) output may be ugly as well but you can not log in with one of
those and they should be handled in a way that is prompt to login removal.

find / -nouser
find / -nogroup

and then after inspection add -delete -print.

find / -empty

Of course these can be combined to form a simple one line command but I
will leave that as a exercise for the reader.

Regards,

-- 

 jhell



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