[Buildroot] [PATCH v3] package/systemd: invoke systemd-tmpfilesd on final image

[yann.morin at orange.com]

Norbert,All,

On 2022-07-04 08:41 +0200, MORIN Yann INNOV/IT-S spake thusly:
> On 2022-01-09 12:07 +0100, Norbert Lange spake thusly:
> > Especially for read-only filesystems it is helpfull to
> > pre-create all folders for non-volatile paths.
> I'm revisiting this old change of yours, and I have some issues
> understanding the original issue this is supposed to fix...
> 
> Indeed, for read-only filesystems, we do generate a factory for /var.
> This code is guarded by a condition on BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW,
> so indeed, if BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW is set, we do not
> create the factory. But if it is set, then we do create the factory:

*if it is _unset_, then we do create the factory.

>   - move /var away to /usr/share/factory/var
>   - register its content as a tmpfiles.d:
>     https://github.com/buildroot/buildroot/blob/master/package/skeleton-init-systemd/skeleton-init-systemd.mk#L37

Note: this tmpfiles.d is currently stored in /etc/tmpfiles.d, but it
really belong to /usr/lib/tmpfiles.d (to later allow for an empty /etc
too).

Regards,
Yann E. MORIN.

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