[systemd-devel] How to make vtable entry as SD_BUS_VTABLE_UNPRIVILEGED

[Lennart Poettering]

On Fr, 31.03.23 05:32, Lal, Arun (arun.lal at intel.com) wrote:

> Hi All,
>
> In file systemd\src\libsystemd\sd-bus\bus-objects.c function check_access has the following check:
>
> /* If the member is marked UNPRIVILEGED let's grant access */
>         if (c->vtable->flags & SD_BUS_VTABLE_UNPRIVILEGED)
>                 return 0;
>
> Can someone tell me how to set the flag as SD_BUS_VTABLE_UNPRIVILEGED?
>
> This is because I want a non-root user to make dbus method call. As of now this get's blocked in check_access function.
> I would like to allow this by satisfying the condition c->vtable->flags & SD_BUS_VTABLE_UNPRIVILEGED

There are roughly a bazillion examples in the systemd source tree for
that. For example here:

https://github.com/systemd/systemd/blob/main/src/login/logind-session-dbus.c#L857

Lennart

--
Lennart Poettering, Berlin