Re: [OE-core] [PATCH] systemd.bbclass: fix postinst for real systemd-systemctl-native

["Mathieu Dubois-Briand" <mathieu.dubois-briand@bootlin.com>]

On Wed May 28, 2025 at 5:56 AM CEST, Patrick Williams wrote:
> The commit 7a580800db39 switched from a small Python implementation
> of `systemctl` to using the real systemctl executable from the
> systemd package.  In the systemd.bbclass, systemd-systemctl-native
> is used to default-enable services, based on the SYSTEMD_SERVICES
> variable, but this was only done if `systemctl` can be executed
> without error.  The problem is that the real systemctl executable
> treats a zero argument call as if `systemctl list-units` were ran.
> This cannot be done when cross-compiling and yields:
>
> ```
>     Failed to connect to system scope bus via local transport: Operation
>     not permitted (consider using --machine=<user>@.host --user to
>     connect to bus of other user)
> ```
>
> The end result is that the `systemd_postinst` effectively turns into
> a silent no-op and services are not correctly enabled.
>
> Switch the systemd.bbclass to use `systemctl --help` instead, which
> does not require any dbus access to be functional.
>
> Fixes: 7a580800db39 ("systemd: Build the systemctl executable")
> Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
> ---

Hi Patrick,

Thanks for your patch.

It looks like this is breaking postinstall in some configurations, with
the following error:

ERROR: core-image-sato-1.0-r0 do_rootfs: Postinstall scriptlets of ['bluez5', 'ofono', 'connman', 'xserver-nodm-init', 'avahi-daemon', 'rpcbind', 'run-postinsts'] have failed. If the intention is to defer them to first boot,
then please place them into pkg_postinst_ontarget:${PN} ().
Deferring to first boot via 'exit 1' is no longer supported.

https://autobuilder.yoctoproject.org/valkyrie/#/builders/26/builds/1704

Looking at the build, I believe following configuration should be enough
to reproduce on core-image-sato or even core-image-minimal.

INIT_MANAGER = 'systemd'
DISTRO_FEATURES_BACKFILL_CONSIDERED:remove = 'sysvinit'
TEST_SUITES:append = ' systemd'

Can you have a look at the source of this issue please?

-- 
Mathieu Dubois-Briand, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com