As the position argument isn’t carried all the way down resource forks won’t work properly (though it easily could be, that would change the internal API for everyone).

OSX doesn’t like AT_FDCWD in it’s fcntl, but getcwd does the job.
Also fixed an issue with absolute paths in the process.

After running Clang’s analyzer on it there were quite a few places where there were mis-matched store sizes and signs.  I updated them so that the underlying code more closely-matches the OS APIs and the type change happens at the FUSE connection.

In this way, if FUSE ever updates the API to actually match the APIs of modern OSes, it’s a fix in one place.

Also, I updated read/write to return the total read/write value the OS returned rather than blindly return the request count.

Finder copies are broken without this argument, even if it’s fixed to 0. Upside: it reduces the number of times we platform-check in the xattr code.

…o mac-updates

…as a size_t)

Clients should get the xattrs they actually asked for, after all.