RFR: 8370719: [Linux] Use /etc/os-release values for font configuration file names

[Alexander Zuev]

On Mon, 3 Nov 2025 22:35:36 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>>> But still, according to that document, the correct location for storing the file is /usr/lib/os-release, while /etc/xx is only a compatibility workaround. Since we’ve already moved from an unspecified or non-standard behavior to the standard one, why not follow the specification completely?
>> 
>> No, according to the [/etc/os-release man page](https://www.freedesktop.org/software/systemd/man/latest/os-release.html):
>> 
>> _"The file /etc/os-release takes precedence over /usr/lib/os-release. Applications should check for the former, and exclusively use its data if it exists, and only fall back to /usr/lib/os-release if that is missing."_
>
>> No, according to the [/etc/os-release man page](https://www.freedesktop.org/software/systemd/man/latest/os-release.html):
> 
> This is what I already posted above, same text on your link:
> 
>> /usr/lib/os-release is the recommended place to store OS release information as part of vendor trees. /etc/os-release should be a relative symlink to /usr/lib/os-release, to provide compatibility with applications only looking at /etc/.

That is a recommendation for Linux vendors on how to organize systemd related data - but we are not Linux vendors. We are on the side of application so we should check /etc as the documentation dictates. Because vendors can disobey the vendor side recommendation and put it... somewhere, like in /proc/systemd to be generated instead of static file.

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PR Review Comment: https://git.openjdk.org/jdk/pull/28073#discussion_r2488063772