FWIW I suspect not handling lockfile errors could be a show stopper even for an initial implementation. It's not that uncommon that people press Ctrl-C. flock on systems that have it would be a safer alternative.
> There are many things to do and I think it is better to do that in trunk > rahter than cumulating relatively complex changes on branch. > md5 is already supported by libiberty so it is kind of easy choice for > first cut implementation. At least use sha1 then. This is also in libiberty and it has hardware acceleration on modern x86. -Andi
