Hi Reza,

This kind of message should probably go to guix-help instead. Can you send your user and groups definition you're using? Then we should see if there's anything wrong with it, or if we can reproduce the issue.

On 2020年8月19日 3:46:59 GMT-04:00, Reza Alizadeh Majd <r.majd@pantherx.org> wrote:
>Hi Guix, 
>
>coming from this thread: 
>https://lists.gnu.org/archive/html/help-guix/2020-07/msg00088.html
>
>I had defined a service that needs to run by a specific user. regarding
>application creates a unix domain socket during start and change the
>ownership of socket file to specific group.
>
>the problem is that daemon user (the user that runs the service) only
>detects it's primary group and don't have permission to `chown` the
>socket file. 
>
>I also performed another test and run a bash instance inside a `screen`
>using the service. when I check for the user groups, I had seen that
>only primary group is detected as group for service user. 
>
>I assume that that this might be a bug on group assignment for service
>user. or I might missed something in service definition. 
>
>kind regards,
>Reza
>
>
>-- 
>Reza Alizadeh Majd
>PantherX Team
>https://www.pantherx.org/