Re: [gentoo-user] X11 without udev/eudev

[karl@aspodata.se]

Karl Hammar:
> Dr. Canek Peláez Valdés:
...
> > My point is that it's not his call; it's the call of the developers of the
> > software that he decided to use.
> 
> Poeple write whatever software they want to or are paid to do.
> It is my call if I want to use that software or not.

 For what some people want to work on, here is an alternative api:
https://github.com/idunham/libsysdev

 And what Anna <cyber@sysrq.in> gratiosly provided:
https://github.com/illiliti/libudev-zero

...
> > There is no bloat; the developers *need* to handle the dynamic hardware
> > case *and* the static hardware case. With udev, they handle both; otherwise
> > there would be two code routes: one for static and another for dynamic
> > hardware.

As an example of that is:
 https://gitlab.freedesktop.org/mesa/drm/-/blob/main/xf86drm.c

The changes nessesary for a non-udev solution is smallish,
and it doesn't have to resort to polling as in the udev case.

A gui's need for pop-up windows when new devices are connected
could just as well be handled separate to the system thing of
/dev nodes, permissions and such. You don't need a daemon for
that, it just that the udev people just merged the use cases.

...
> As a side note,
...

As an actual case, this is a prototype for a three way mouse
to be used on ship bridges
 http://aspodata.se/git/openhw/boards_arm_aspo/mouse/
Switching a knob, I can send mouse events to three different
computers, say for radar, maps, etc.
It uses microsoft serial mouse protocol.
This possible for low end mcu's since they contain multiple
serial interfaces.

If I had to use usb, well, not even a high end mcu's like
stm32f4 has more than two usb ports.

Regards,
/Karl Hammar