I need to be able to perform random access I/O against a file,
creating a new file if it doesn't exist, or opening as-is (no
truncation) if it already exists.
None of the access modes for std.stdio.File seem to allow that.
Any usage of the "w" mode causes my code to consider the file
empty if it pre-exists (though, it doesn't always actually
truncate the disk on file?)
If I was coding in C, I would use open() as it gives more options
for access:
http://pubs.opengroup.org/onlinepubs/009695399/functions/open.html
However, I don't see this exposed in phobos anywhere?
