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Paul Sokolovsky authored
Per POSIX http://pubs.opengroup.org/onlinepubs/9699919799/functions/send.html : "If space is not available at the sending socket to hold the message to be transmitted, and the socket file descriptor does not have O_NONBLOCK set, send() shall block until space is available. If space is not available at the sending socket to hold the message to be transmitted, and the socket file descriptor does have O_NONBLOCK set, send() shall fail [with EAGAIN]."
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