Should nonblocking I/O calls to a disconnected device get an error?[was: Problem: hiddev stops sending events after some error recoveries]

[Alan Stern]

On Fri, 1 Feb 2008, Salvador Eduardo Tropea wrote:

> Now, I tried unplugging the device while executing a NONBLOCKing
> program. I didn't get any I/O error. It means I was wrong about the
> difference between unplugging the device and the effect of a recovery
> like the one I mentioned previously. You are right, but IMHO that's odd,
> the device should also inform I/O error when reading using a NONBLOCKing
> file handler. Currently a program must use blocking reads in order to
> get notified about the problem. It looks bad and lacks consistency. What
> do you think?

I don't know.  Other people have debated this issue in the past, but I 
can't remember what the final decision was or the reasons for it.

Alan Stern

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