Nonblocking I/O and POLL_BUG

Dan Merillat harik at
Tue Oct 26 05:24:01 UTC 1999

Per Hedeland writes:
> Dan Merillat wrote:

> >  I've coded my select/poll loops in such a way as
> >to treat -EAGAIN as a non-error, but lately I've put a spin counter in.
> Probably wise - as I wrote you should never get it on the first read
> (on the right descriptor:-) after select/poll, though in some cases it
> may make sense to keep reading until you get it.

Right... it's easier to run a loop of read returning >0, then to do
a special case over the "first read".

Although, I've never seen this OS bug myself... what platforms is it known
to occur on?  (select returning readable but read returning -EAGAIN)


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