One of the long standing goals of Unity has been to provide an application focused presentation of the desktop. Under X11 this proves tricky as anyone can connect into X and doesn't necessarily have to give information on what applications they're associated with. So we wrote BAMF, which does a pretty good job of matching windows to applications, but it could never be perfect because there simply wasn't enough information available. When we started to rethink the world assuming a non-X11 display server we knew there was one thing we really wanted, to never ever have something like BAMF again.

This meant designing, from startup to shutdown, a complete tracking of an application before it started creating windows in the display server. We then were able to use the same mechanisms to create a consistent and secure environment for the applications. This is both good for developers and users as their applications start in a predictable way each and every time it's started. And we also setup the per-application AppArmor confinement that the application lives in.

Enough backstory, what's really important to this blog post is that we also get an event when an application starts and stops which is a reliable event. So I wrote a little tool that takes those events out of the log and presents them as usage data. It is cleverly called:

$ ubuntu-app-usage

And it presents a list of all the applications that you've used on the system along with how long you've used them. How long do you spend messing around on the web? Now you know. You're welcome.

It's not perfect in that it uses all the time that you've used the device, it'd be nice to query the last week or the last year to see that data as well. Perhaps even a percentage of time. I might add those little things in the future, if you're interested you can beat me too it.

posted Nov 14, 2014 | permanent link