Re: [gentoo-portage-dev] [PATCH v2] AbstractEbuildProcess: disable ipc_daemon under Windows Subsystem for Linux

[Kerin Millar]

Hi Zac,

On Thu, 22 Sep 2016 20:48:26 -0700
Zac Medico <zmedico@g.o> wrote:

> On Thu, Sep 22, 2016 at 8:23 PM, Kerin Millar <kfm@×××××××××.net> wrote:
> > Duly updated to use any instead of ==, as recommended by Brian Dolbec.
> >
> > --
> > Kerin Millar <kfm@×××××××××.net>
>
> My first choice would be to use a small test case to detect when ipc
> is broken, and disable it dynamically. A good example of such a test
> is the can_poll_device function here:
>
> https://gitweb.gentoo.org/proj/portage.git/tree/pym/portage/util/_eventloop/EventLoop.py?h=portage-2.3.1#n597

This is a good idea. I suspect a faulty implementation of (e)poll, but the exact manner in which WSL is falling short is something that eludes me. Should I manage to figure out, I'll likely propose an alternative workaround.

>
> If it's not possible to use a test similar to the above, maybe it's
> best to use /proc/version or /proc/sys/kernel/osrelease as mentioned
> in the following issue:
>
> https://github.com/Microsoft/BashOnWindows/issues/423

I had read this prior but didn't find it convincing. However unlikely it may seem, someone could add Microsoft to EXTRAVERSION - for an Azure guest perhaps - and break such a heuristic. By contrast, the chances of /dev/lxss existing outside of the (L)inu(X) (S)ub(S)ystem are infinitesimally small.

-- 
Kerin Millar <kfm@×××××××××.net>