[Bug time/30701] getutxent misbehaves on 32-bit x86 when _TIME_BITS=64

["fweimer at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=30701

--- Comment #7 from Florian Weimer <fweimer at redhat dot com> ---
(In reply to Bruno Haible from comment #4)
> While doing this conversion, the code could interpret the 'tv_sec' field as
> an 'unsigned int' (as opposed to an 'int'). This would solve the year 2038
> problem at this place. Suggested by Andreas Schwab in
> https://sourceware.org/pipermail/libc-alpha/2023-August/150661.html .

This has been implemented in glibc 2.40 via:

commit 5361ad3910c257bc327567be76fde532ed238e42
Author: Florian Weimer <fweimer@redhat.com>
Date:   Fri Apr 19 14:38:17 2024 +0200

    login: Use unsigned 32-bit types for seconds-since-epoch

    These fields store timestamps when the system was running.  No Linux
    systems existed before 1970, so these values are unused.  Switching
    to unsigned types allows continued use of the existing struct layouts
    beyond the year 2038.

    The intent is to give distributions more time to switch to improved
    interfaces that also avoid locking/data corruption issues.

    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

No backports planned.

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