select on udp recvfrom doesn't work ???

[Dave Cramer]

Is there some reason that doing using select does not see the data
coming to a udp socket that is not connected, but is bound and is
listening.

I am broadcasting data to the socket. I have confirmed that if I don't
use select that it receives data.

What I am trying to do is synchronize multiple linux embedded systems
to within 10ms. My thought is to use a UDP broadcast to start the
synchronization then use the internal clocks. If anyone has any
interesting ideas I'm open to suggestions.

Dave
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