Re: XWayland, /tmp/.X11-unix

[ludo@gnu.org (Ludovic Courtès)]

Hello!

Marius Bakke <mbakke@fastmail.com> skribis:

> Thorsten Wilms <t_w_@freenet.de> writes:
>
>> On 26.03.2018 11:33, Marius Bakke wrote:
>>> It could be done with a "profile hook" in (guix profiles).  Although for
>>> the common case I suppose this will be done by a display manager?
>>
>> But then all X11-supporting display managers would have to care about it.
>>
>> According to answers in
>> https://unix.stackexchange.com/questions/196677/what-is-tmp-x11-unix
>> /tmp/.X11-unix/ is the directory where any X11 server will create the 
>> unix domain socket X0.
>>
>> One answer implies that is not necessarily the only way an X11 server 
>> may communicate with clients on the same machine.
>>
>> `/gnu/store: grep -iRs X11-unix` only showed results caused by my own 
>> simple-service, matches in binary files and a comment in a 
>> slim-sigusr1.patch:
>> "The problem was that SLiM doesn't pay attention to SIGUSR1.  So in 
>> practice, if X starts slowly, then SLiM gets ECONNREFUSED a couple of 
>> time on /tmp/.X11-unix/X0, then goes on trying to connect to 
>> localhost:6000, where nobody answers; eventually, it times out and tries 
>> again on /tmp/.X11-unix/X0, and finally it shows up on the screen."
>>
>> I would think that something must already take care of /tmp/.X11-unix/ 
>> for an operating-system configuration using plain X11?
>
> Interesting.  I assumed SLiM created it, but could not find it with
> 'grep'.  Maybe libx11?

‘_xcb_open_unix’, called by ‘_xcb_open’ in libxcb, creates /tmp/.X11-unix.

Ideally Wayland’s client library would create it as well if it needs it?

> In any case it should be safe to add an activation script that creates
> /tmp/.X11-unix on GuixSD.  I think it can be part of %desktop-services,
> or maybe even %base-services.

Sounds like a good idea.

Ludo’.