I have a piece of code that is listening to multiple incoming
communications channels over UDP and TCP. This code has set the sockets
non-blocking and is using select with a time-out to detect when there is
I-O traffic to process.
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.
Anybody seen this, is it a known problem with Linux kernels? (I am
currently running 2.6.22.9-91.fc7)
Is there a known work round. I am currently thinking of replacing the
AF_UNIX socket pair with a mesh of AF_INET/SOCK_DGRAM/localhost channels.
Regards, Howard.
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