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Date: Mon, 19 Oct 2020 21:08:56 -0400
From: Rich Felker <>
To: Arjun Shankar <>
Cc:, Florian Weimer <>,
	Carlos O'Donell <>
Subject: Re: Plans to remove nscd in Fedora

On Mon, Oct 19, 2020 at 07:13:31AM -0400, Arjun Shankar wrote:
> Hi all,
> I am one of the maintainers for glibc in Fedora. We are planning to remove
> nscd from Fedora in the near future, targeting the Fedora 34 release [1].
> Florian recently pointed out to me that this can impact users of musl-libc
> binaries since musl is nscd-aware.
> I can see that the Fedora musl-libc package has no "official" dependent
> packages (excepting musl-devel) in the Fedora repositories, but I expect
> that there might be packages/applications from out of the distribution and
> use cases that are affected by or possibly break with the removal of nscd.
> I'm writing to get some clarity on this.
> Best Regards,
> Arjun
> [1] WIP:

The only capacity in which musl uses nscd is to access custom
user/group backends provided through it. musl specifically does not
use nss itself because it's not compatible with static linking and
because loading arbitrary module libraries into the calling process's
core is not safe and goes against best practices. I believe the glibc
folks were starting to realize this too, so it was kinda my hope that
nscd would become the main/only way nss modules are accessed on glibc


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