[alsa-devel] Listing raw midi devices "The Right Way"?

[Jacob Ole Juul Kolding]

Hello all

I'm working on an app that used to run on Linux but then moved to OS X
and gained MIDI capabilities.
Now it's moving back to Linux so I need to be able to read midi events
from devices.

I already found a code example that reads raw midi packages form a
specified device but I need to have a complete list of ALL raw midi
capable devices and ports on the system.

What is the "Right Way" for an app to build such a list?

Sincerely 
Jacob Kolding
Juvul Tech