small nitpick, but i try to use openbsd style
since i like that style. upon further reading
of their style guidelines today, it was revealed
to me that for includes, they:

* sort sys/ includes alphabetically, at the top
* after sys/ includes, have an empty line
* includes for networking-related headers below that
* empty space below networking headers if there
* after that, have the rest of the includes, sorted
  alphabetically

at least, that is my understanding. i have to admit,
it does look cleaner

not really that critical but why not do it?

At the end of each line is an errant space.

Fix that.

not just sloccount, but compiled binary size as
tested with tcc on an x86_64 host

i went too hard on the sloc reductions

a check inside a for loop could cause
incomplete reading of gbe images

revert that

also removed some unnecessary checks

fixed the check of pwrite's return value
(it should check for -1)

added a few that were more useful

deleted a few obnoxious ones