bug#35996: User account password got locked when booting old generation

[Ludovic Courtès]

Hello,

"pelzflorian (Florian Pelz)" <address@hidden> skribis:

> Please add more logging and/or locking.  Note that the elogind has the
> following comment in its locking implementation in
> /gnu/store/dm2ri0qvjirl0iq2ndfk5z9lq9dyk4jf-elogind-241.3-checkout/src/basic/user-util.c:
>
>         /* This is roughly the same as lckpwdf(), but not as awful. We
>          * don't want to use alarm() and signals, hence we implement
>          * our own trivial version of this.

Attach is a set of patches to lock /etc/.pwd.lock when we access
/etc/{passwd,shadow,group} from the activation snippets.  It should
ensure that, when running ‘guix system reconfigure’, we’re honoring the
locking protocol that Shadow & co. follow.

It would be great if you could test again in this context.

Thanks!

Ludo’.

0001-syscalls-Add-with-file-lock-macro.patch
Description: Text Data

0002-syscalls-with-file-lock-expands-to-a-call-to-call-wi.patch
Description: Text Data

0003-syscalls-with-lock-file-catches-ENOSYS.patch
Description: Text Data

0004-activation-Lock-etc-.pwd.lock-before-accessing-datab.patch
Description: Text Data

0005-nar-Really-lock-store-files.patch
Description: Text Data