[bug#57881] [PATCH] gnu: hikari: only allow use setuid hikari-unlocker.

[Josselin Poiret via Guix-patches via <guix-patches@gnu.org>]

Hi,

路辉 <luhux76@gmail.com> writes:

> hikari-unlocker need setuid and pam to work.
>
> if hikari exec a non-setuid hikari-unlocker, such as
> "$HOME/.guix-profile/bin/hikari-unlocker", it will cause hikari's
> lock-mode can't exit, only can press power button to exit it. :(
>
> https://hikari.acmelabs.space/manpage.html
>
> https://hub.darcs.net/raichoo/hikari/browse/src/lock_mode.c#71
> From d1bedbc3c850cf0a60b182999c229079bad9cd99 Mon Sep 17 00:00:00 2001
> From: Lu Hui <luhux76@gmail.com>
> Date: Sat, 17 Sep 2022 20:10:34 +0800
> Subject: [PATCH] gnu: hikari: only allow use setuid hikari-unlocker.
>
> * gnu/packages/wm.scm (hikari)
> [phases]{force-use-setuid-unlocker}: replace "sh -c hikari-unlocker" to
> "/run/setuid-programs/hikari-unlocker"

On Guix system, /run/setuid-programs/ should be in front of whatever
profiles you're using in your PATH, otherwise it will be shadowed by
them.  With the default profile loading code in /etc/profile, this
should be what happens but there might be issues with any non-default
setup (ie. package not installed in the ~/.guix-profile/).

To be honest, I'm not happy with hardcoding
/run/setuid-programs/hikari-unlocker, since it won't work on foreign
distros.

Shouldn't we rather report this issue upstream?  I'm under the
impression that the locker should detect that it isn't running suid and
not try to query PAM if it isn't able to, and instead fail and display
an error message or something similar.

Best,
-- 
Josselin Poiret