[debian-mysql] Bug#1023778: TMPDIR behaviour in maintainer scripts [was: Re: Bug#1023778: mysql-server-8.0: fails to restart on upgrade with libpam-tmpdir]

[Robie Basak]

On Sun, Nov 13, 2022 at 04:16:29PM +0100, Marco d'Itri wrote:
> And I think that it would be wrong to have dpkg generally unset $TMPDIR, 
> because if root sets it then it would be reasonable to expect that also
> dpkg and the maintainer scripts use it (as long as they are not dropping 
> privileges).

This seems inconsistent to me. Where is the expectation that TMPDIR must
be unset if dropping privileges coming from? Obviously for users of
libpam-tmpdir that's a problem. But in the default case, it's something
that would be entirely reasonable to inherit through a drop of
privileges, for the same reason that I think you find that setting
TMPDIR for maintainer scripts to use would be useful.
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