[systemd-devel] WSL Ubuntu creates XDG_RUNTIME_DIR with incorrect permissions

[Thomas Larsen Wessel]

>
> WSL does not use systemd by default.


According to this article, it systemd has been default on WSL Ubuntu since
june 2023. https://learn.microsoft.com/en-us/windows/wsl/systemd

*"Systemd is now the default for the current version of Ubuntu that will be
installed using the wsl --install command default."*

Also when I look in the /var/log/auth.log, there are many lines with
systemd, e.g.:


*Nov 25 22:30:14 ELCON45223 systemd-logind[155]: New session 6 of user
velle.Nov 25 22:30:14 ELCON45223 systemd: pam_unix(systemd-user:session):
session opened for user velle(uid=1000) by (uid=0)*

Could someone please help me understand exactly which part creates this
XDG_RUNTIME_DIR folder? Is it part of the systemd repo or not? And if the
answer is (or may be) different between Ubuntu and WSL Ubuntu, I would be
happy if you share what you know about any any of those cases :) Right now,
I barely know where to report this issue.


On Sun, Nov 26, 2023 at 10:07 AM Andrei Borzenkov <arvidjaar at gmail.com>
wrote:

> On 26.11.2023 02:39, Thomas Larsen Wessel wrote:
> > I set up WSL on Windows 10 and created an instance from the default
> Ubuntu
> > 22.04 image.
> >
> > I ran some (non-GUI) software that somehow relies on Qt, and apparently
> Qt
> > does some checks on the XDG environment, so I got the following.
> >
> > *Warning: QStandardPaths: wrong permissions on runtime directory
> > /run/user/1000/, 0755 instead of 0700*
> >
> > And yes, all the user folders are set to 755, including much of their
> > content, which violates the XDG Base Directory Specification.
> (screenshot:
> > https://i.imgur.com/ISn3ebh.png).
> >
> > As far as I can understand, its some part of systemd, that creates this
> > folder. So is this an issue with systemd?
> >
>
> WSL does not use systemd by default.
>
> > The validate_runtime_directory in pam_systemd already does a number of
> > checks on XDG_RUNTIME_DIR. How about also checking if the permissions are
> > correct/valid?
> >
> > Sincerely, Thomas
> >
>
>
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