Re: [gentoo-dev] Requirements for UID/GID management

["M. J. Everitt" <m.j.everitt@iee.org>]

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On 29/01/17 03:23, Gordon Pettey wrote:
> On Sat, Jan 28, 2017 at 8:54 PM, Michael Orlitzky <mjo@gentoo.org
> <mailto:mjo@gentoo.org>> wrote:
>
>     On 01/28/2017 09:22 PM, Rich Freeman wrote:
>     >
>     > Honestly, I really will say "so what" here.  :)
>     >
>
>     I forgot to mention a few of the advantages of having really-fixed
>     UIDs.
>     First, it makes the code simpler. Yup, cool.
>
>     It also lets us play a nice trick and use the UID as a subslot, so
>     that
>     if some sys-user/foo package ever changes its UID, everything
>     depending
>     on it can be rebuilt to use the new UID.
>
>
> That's nonsense for reasons already mentioned by rich0. UIDs don't
> change except in the case of an admin doing it manually.
The question is not whether the UIDs have or are changing .. its whether
they were the same in the first place. With the exception possibly of
two+ identical installs (ie. same base image, same portage snapshot,
same install sequence, same USE flags, etc etc etc) the case of a
non-identical setup may cause slight differences (a common "off-by-one"
error) in UID allocation if "next available" is the default allocation
option.

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