Re: Request for Assistance: Customizing systemd Configuration on Isar Build System

[Henning Schild <henning.schild@siemens.com>]

Am Sat, 18 Mar 2023 18:16:10 -0700 (PDT)
schrieb Taneli Liljasto <taneli.liljasto@gmail.com>:

> Hi,
> 
> I hope this message finds you well. I am relatively new to BitBake
> and the process of creating custom Linux images. I am currently
> working on a project that requires the modification of the systemd
> configuration file located at /etc/systemd/system.conf. My objective
> is to enable the watchdog feature and alter the logging settings
> within this file.

Touching this file could turn out hard because it is owned by a package
that you in Isar install directly from Debian.

Better would be to set the values from snippet files in
/etc/systemd/system.conf.d/*.conf those snippets would be installed via
a customizations package using the class "dpkg-raw"

Best try it first manually and once you know what files and lines you
want start writing your package recipe and make sure the package gets
installed with IMAGE_INSTALL.

An example can actually be found here
https://gitlab.com/cip-project/cip-core/isar-cip-core/-/commit/89ec2cb2d8709419c8adffdc071242c69e50266a
It does watchdog, also something on printing and other things.

Henning


> I have been utilizing meta-isar's application recipes as a reference
> to include my custom files on the device. However, I have encountered
> a challenge with customizing the settings, as my files are being
> overwritten by package configurations during the build process. It
> appears that I may be missing some critical understanding of the
> correct method to achieve this customization.
> 
> I kindly request your guidance on this matter. Your expertise and 
> recommendations on how to properly modify the systemd configuration
> file within the Isar build system would be greatly appreciated. If
> there are any resources or documentation that you believe may be
> helpful in this regard, please do not hesitate to share them.
> 
> Thank you in advance for your time and assistance. I look forward to 
> learning from your collective knowledge and experience.
> 
> Best regards,
> Taneli Liljasto
>