The primary logged-in session is of course authorized to access the main
X11/wayland display, but it's often useful to add display authorization
to other accounts. For instance, looking at disk space with 'baobab'
works better as root because some areas of the filesystem are not
readable to normal users (*). I used to do such authorization by
xhost +si:localhost:root
but it recently stopped working:
https://bugzilla.redhat.com/show_bug.cgi?id=1527754 . Is there another
way of authorizing display access for other accounts? If not, this is a
fairly painful regression.
As to the root cause, it almost looks like some unfinished work is being
done on API changes in the code for change_host() ; it prepares the
arguments for XAddHost() in a complex form, but the actual definitions
in the version of libX11 being used are more simplistic (see my second
BZ comment). Could someone familiar with X11 development take a look at
this?
(*) I know, I know, we should move to running apps as regular user and
just give them only the capabilities they really need, but that's where
we are for now.
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