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Re: All services that require a restart from libc6 upgrade...

On Tue, Oct 17, 2000 at 07:03:48AM +1000, Anthony Towns wrote:
> On Mon, Oct 16, 2000 at 04:23:43PM -0400, Ben Collins wrote:
> > 	Some daemons can be affected by libc upgrades. This usually
> > 	happens if the daemon uses functions related to NSS (username,
> > 	group, hostname and other name lookups). Because these functions
> > 	rely on loading modules (libnss_*.so) that may not match the
> > 	current libc mapped in memory with the program, it may need to be
> > 	restarted when libc is upgraded. The libc package takes care of when
> > 	this needs to occur, but your daemon will need to tell libc that
> > 	it needs to be restarted in this case.
> Erm, why should I have to fix libc bugs in my packages? That seems
> completely and utterly inappropriate.
> Surely there's some other way to work around this, ideally fixing
> the root cause not having a zillion other packages work around obscure
> incompatible changes in libc?

Obviously you don't understand the reason behind this. When daemons are
running, they carry with them the libc.so.6 that got loaded with it while
the NSS modules that it uses remain on disk. Now upgrade libc.so.6, and
the running daemon still has the old one loaded, but the NSS modules are
new and linked against the new libc.so.6. BOOM. You can't "fix" this, it
isn't broken. It is inherent in versioned libraries.

/  Ben Collins  --  ...on that fantastic voyage...  --  Debian GNU/Linux   \
`  bcollins@debian.org  --  bcollins@openldap.org  --  bcollins@linux.com  '

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