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Peter Maydell authored
POSIX allows sendmsg() and recvmsg() to fail EMSGSIZE if passed a zero msg.msg_iovlen (in particular the MacOS X implementation will do this). Handle the case where iov_send_recv() is passed a zero byte count explicitly, to avoid accidentally depending on the OS to treat zero msg_iovlen as a no-op. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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