> One could argue that the mm functions shouldn't have a flags arg in
> their func protoptyes at all, as they are dealing with a sequence of
> messages, each of which has a flags field in its msghdr, which really
> should be all that is needed.
msg_flags is not the same flag bits as the flags arg to send{,m}msg.
Conceptually, the former applies to the message; the latter to the
operation, though there is a certain amount of confusion (eg, MSG_EOR).
Consider MSG_CTRUNC (flag on message) and MSG_NOSIGNAL (flag on
operation) if you want a clear example of the distinction.
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