Handle EAGAIN and EINTR in do_ctrl #50
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Function do_ctrl doesn't handle EAGAIN, so sometimes penctl fails with
error reading from socket.This PR patched function do_ctrl and handled EAGAIN and EINTR.
I don't know if it is better to wrap my_recv and handle EAGAIN, there are many locations that my_recv is invoked. I only observed EAGAIN in function do_ctrl.