send notifications to all users

[Thomas Koch]

Hi,

I'd like to notify all logged in users of some system event, e.g. from a 
script started by cron, anacron or systemd timers.

The internet is full of Q&A about this and many hacks to publish DBUS or 
DESKTOP variables to the root user.

But now with all this systemd, consolekit and desktop-notification stuff: I 
wonder whether there shouldn't be a better solution. And if there isn't, what 
would be the right place to add this?

Thank you,

Thomas Koch