K 10
svn:author
V 4
wulf
K 8
svn:date
V 27
2019-03-10T20:43:08.288417Z
K 7
svn:log
V 696
MFC r344494,r344495:

evdev: export event device properties through sysctl interface

A big security advantage of Wayland is not allowing applications to read
input devices all the time. Having /dev/input/* accessible to the user
account subverts this advantage.

libudev-devd was opening the evdev devices to detect their types (mouse,
keyboard, touchpad, etc). This don't work if /dev/input/* is inaccessible.
With the kernel exposing this information as sysctls (kern.evdev.input.*),
we can work w/o /dev/input/* access, preserving the Wayland security model.

Submitted by:	Greg V <greg@unrelenting.technology>
Reviewed by:	wulf, imp
Differential Revision:	https://reviews.freebsd.org/D18694

END