bug#64937: "who" reports funny dates

[Paul Eggert]

On 2023-07-30 04:02, Pádraig Brady wrote:
> Yes I think the consensus is to switch away from the utmp API,
> which was recently discussed at:
> https://lists.gnu.org/archive/html/coreutils/2023-06/msg00024.html

If I understand that discussion correctly, the idea is to switch from 
utmp/utmpx to the systemd interface once systemd 254 comes out.

As it happens, systemd 254 was published Friday. It'd be good to get it 
working with coreutils.

Thorsten's draft coreutils patches 
<https://github.com/thkukuk/utmpx/tree/main/patches/coreutils> are a bit 
long, and I'm hoping we can simplify this by packaging the fix inside 
Gnulib (much as we already packaged the fix for <utmpx.h> not working on 
32-bit GNU/Linux x86 and ARM when _TIME_BITS is 64[1]), so that we 
needn't patch Coreutils other than to upgrade Gnulib version.

Is there any way to test this stuff easily on a platform like Fedora 38 
that is running systemd 253? That is, can I merely build the systemd 
libraries and link to them (how?), or would I have to replace the entire 
systemd ecosystem?

[1]: https://lists.gnu.org/r/bug-gnulib/2023-07/msg00159.html