GNU logs - #76928, boring messages

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Subject: bug#76928: User accounts are shared between system generations
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Found this one on accident today and was surprised.  To reproduce:

 - Remove your user account from your system configuration on=20
 accident.
 - `sudo guix system reconfigure'
 - Realize your mistake.  Observe that neither `su' nor `sudo'=20
 work, because you don=E2=80=99t exist.
 - Reboot in a state of mild panic.
 - Select any previous system generation from GRUB.

Expected result: previous generations should have the account=20
which was deleted, since it was declared in the configurations=20
which produced them.

Actual result: They don=E2=80=99t.

  -- Ian

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Ian Eure <ian@HIDDEN>
Subject: bug#76928: Acknowledgement (User accounts are shared between
 system generations)
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Date: Mon, 10 Mar 2025 22:47:04 +0000

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Subject: bug#76928: User accounts are shared between system generations
Resent-From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
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From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
In-Reply-To: <874j00o65m.fsf@HIDDEN> (Ian Eure's message of "Mon, 10 Mar
 2025 15:46:45 -0700")
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Date: Mon, 17 Mar 2025 20:41:48 +0100
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Hi,

Ian Eure <ian@HIDDEN> skribis:

> Found this one on accident today and was surprised.  To reproduce:
>
> - Remove your user account from your system configuration on
>   accident.
> - `sudo guix system reconfigure'
> - Realize your mistake.  Observe that neither `su' nor `sudo'  work,
>  because you don=E2=80=99t exist.
> - Reboot in a state of mild panic.
> - Select any previous system generation from GRUB.
>
> Expected result: previous generations should have the account which
> was deleted, since it was declared in the configurations which
> produced them.
>
> Actual result: They don=E2=80=99t.

Are you sure?  /etc/{shadow,passwd,group} are created at activation
time, meaning when booting or reconfiguring (see =E2=80=98account-activatio=
n=E2=80=99,
which returns code that calls =E2=80=98activate-users+groups=E2=80=99, the =
procedure
that creates those files).

Thanks,
Ludo=E2=80=99.

Last modified: Mon, 17 Mar 2025 19:45:02 UTC

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Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.