[libvirt] Fwd: libvirtd failing on MacOS in setgroups

[Marcus Furlong]

On Wed, 21 Aug 2019 at 08:23, Daniel P. Berrangé <berrange at redhat.com> wrote:
>
> On Tue, Aug 20, 2019 at 11:11:07AM -0400, Marcus Furlong wrote:
> > Resend to libvir-list in case that is more appropriate:
> >
> >
> > Hi,
> >
> > I get the following error when running libvirtd on MacOS as root:
> >
> > 2019-07-11 00:12:33.673+0000: 123145573953536: error :
> > qemuProcessQMPLaunch:8501 : internal error: Failed to start QEMU
> > binary /usr/local/bin/qemu-system-x86_64 for probing: libvirt:  error
> > : cannot set supplemental groups: Invalid argument
>
> Are you able to run 'strace' (or whatever MacOS eqiuv is) to see
> the values passed to setgroups when it fails ?

I ran `dtruss -f -l -s /usr/local/sbin/libvirtd` but the setgroups
calls seem to be missing.

Looking at other sources, it seems like some have special treatment of
setgroups on MacOS, e.g. samba:

   https://github.com/samba-team/samba/blob/v4-11-stable/source3/smbd/sec_ctx.c#L261-#L305

Perhaps this is needed for libvirt?

Marcus.
-- 
Marcus Furlong