On Fri, Nov 11, 2016 at 6:27 PM, Nikolaus Rath <nikol...@rath.org> wrote:
> Yeah, I'd expect most people to do that. But FUSE file systems are often > a little more exotic and produce error conditions that don't match well > with any of the codes documented in the manpages. If there is no good > fit, I'd expect that most people would (as I have done so far) simply > pick something more appropriate from errno(3). If some of these codes > are forbidden (or only a subset allowed) I'd really like to document > this. It's not reasonable to expect every libfuse user to start browsing > the Linux VFS code to determine if they can use a particular error code. The library and the kernel checks for -1000 < error <= 0. There are no other checks done by fuse. However returning ENOSYS for open is simply wrong, it's definitely not something a sane filesystem would ever do. Thanks, Miklos
