[xmonad] kill -STOP/-CONT hack

[Brandon Allbery]

On Tue, Jun 14, 2016 at 6:23 PM, Brandon Allbery <allbery.b at gmail.com>
wrote:

> On Tue, Jun 14, 2016 at 6:19 PM, Brandon Allbery <allbery.b at gmail.com>
> wrote:
>
>> I just realized xeyes was a bad choice; Stoppable relies on _NET_WM_PID,
>> and...
>>
>
> If you test this with a terminal, use one that doesn't use factory
> backends (like xterm or urxvt --- NOT urxvtc!) or suppress the backend
> factory; otherwise you get the pid of the factory and will be very unhappy
> when it suspends every terminal instance because they're all owned by the
> factory.
>

I should also mention that I pointed out these and other shortcomings of
the information any implementation could rely on for this --- which isn't
much --- to the author back when they were writing it. You seem to be
hitting all the pain spots where it can't work sensibly. (Very recent xorg
has a call that could make the xeyes case work, but would not help with the
other cases I mentioned. It would also open an interesting potential issue
with remote windows via ssh X11 forwarding, where it could suspend the ssh
as the apparent owner of the window and cause the remote to time out and
drop the connection.)

X11 *really* does not want this kind of thing to work.

-- 
brandon s allbery kf8nh                               sine nomine associates
allbery.b at gmail.com                                  ballbery at sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net
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