Re: File sharing over virtio-9p

[Ryota Ozaki <ozaki-r%netbsd.org@localhost>]

On Fri, Oct 25, 2019 at 11:19 PM Mouse <mouse%rodents-montreal.org@localhost> wrote:
>
> > [W]hich of the following is more readable to the user:
>
> > $ ls foo
> > ls: foo: No such file or directory
>
> > or
>
> > $ ls foo
> > ls: stat(foo): No such file or directory
>
> It depends entirely on the user.
>
> As I recently wrote on a non-NetBSD mailing list, there is no such
> thing as a good or bad user interface; there is only a good or bad user
> interfaces for a particular user (or class of sufficiently-similar
> users).
>
> I've lost track of the number of times I've had to resort to a
> sledgehammer such as ktrace to find out what's really going wrong
> because an error message doesn't report enough information.

I've had similar experiences on KASSERT; if a KASSERT fails because of
memory corruption, I wish to know not only if it fails or not but also
values used in KASSERT.


Anyway thank you for suggestions.  I committed the patches with
changing the error message for open while keeping one for setsockopt.

It may be good to have guidelines on writing error messages somewhere.

  ozaki-r