Trying to parse the output of several procfs files isn't as easy as it looks. The per-pid maps file for one (smaps is even worse). Much better if I could just get a struct with all this information.
I've not looked at kernel source but, when I had a task to read info from /proc it looked like a lot of info was just pack() in there. So my parsing was just done with unpack(). Mapping those values from things that could be found in existing userland tools.
