Add 'primary' keyword to mattr.

[lwilletts]

So you can always get the primary screen values regardless of what it is called.

I don't think this would cause any conflicts with display adapter names.

[pockata]

That's actually something that I've wanted to do for a while now.

I just pushed a few changes that implement this behavior in lsm. You can get the primary monitor (if specified via xrandr) with the -p flag.

$ lsm -p
VGA1

In it's current state the, when there's no primary monitor, lsm just returns empty output.

EDIT:
Come to think of it would an error be more appropriate for a response when there's no primary monitor?
Perhaps so we can do lsm -p || echo "no primary monitor"

What do you think?

[lwilletts]

Empty output with an error code return is the wmutils way, I would say to stick to that.

[lwilletts]

Getting a segmentation fault when just calling lsm with no options now.

[pockata]

Nice catch!
I've fixed the issue and now lsm returns an error code with the -p param and no primary monitor specified.