On Sun, 23 Jul 2017 20:15:11 +0200
Patrick Dupre wrote:

> In a fresh install of f26, I get
> cannot open display: 0:
> when I try to run a X application (for example gparted) with root
> Are there new rules to run a X application (compared with f24)?
> echo $DISPLAY 
> 0:

I get this as well, but only in wayland. I assume there
must be some new undocumented nonsense to get access to
other users in wayland. In an Xorg display root display
access works the same as it always has for me.

I was wrong, it is documented:

https://fedoraproject.org/wiki/Common_F25_bugs#wayland-root-apps

Presumably f26 is still protecting users from themselves
the same way.

The fun thing about this whole urban legend of GUI apps
being more insecure than any other kind of apps when run as
root is that it appears to be simply taken as an article
of faith. I have asked before for someone to point me
the the big list of exploits that have happened because someone
ran a GUI app as root, and so far all I've gotten is crickets.

You'd think if this was such a well known problem that
there would be at least one real world example, but I
sure can't find it.
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