One stylistic note:

Historically, unix systems have, for the most part, used
single_case_underscore_separated_identifiers, not
MixedCaseMashedTogetherIdentifiers.  (I believe that this is one of
the things which was inherited from Multics, which also used those
sorts of identifiers extensively).

I'd use names which look like:

mem_total_bytes
mem_free_bytes

etc.

instead of MemTotalBytes

				- Bill