[boost] File Handle and FILE* wrappers?

Hi, Would there be any interest in wrappers for file handles / descriptors and FILE*? Sometimes one needs native handles or FILE* for interoperability or special features like memory mapped IO, but standard C++ doesn't provide convenient RAII friendly wrappers for these. The idea seems trivial yet quite useful. I'm aware of but it seems to be too high-level. I've put a simple start for FILE* at https://code.google.com/p/xbt/source/browse/trunk/xbt/misc/xbt/cfile.h What do you think? Also posted at https://groups.google.com/a/isocpp.org/forum/#!topic/std-proposals/Q4RdFSZgg... -- Olaf