Problem with socketpair , AF_UNIX and select call - can anybody through any light on this!

[Gordon Messmer]

Howard Wilkinson wrote:
> I wanted to add a socketpair connection from the master process to the 
> servers which implement the actual functionality. I created the 
> socketpair, set both ends non-blocking and added it to the select set 
> of fd's. I get an immediate return saying that the socket is ready to 
> read but when I issue a recv I get  -1 (EAGAIN). Nothing I have tried 
> sets the required behaviour of only returning when there is 'real' 
> data to read.

You're probably better off asking on a Posix programming list than 
here.  Wherever you ask, though, you should post the code in question, 
or code that demonstrates the problem in a state that can be compiled 
and verified by others.  While you've described what you think you've 
done, you haven't given enough information for us to do anything but 
guess at the problem.