linux send call with flag MSG_DONTWAIT

Question

On a blocking socket, if I set the flag MSG_DONTWAIT on a per call basis, will it effect the socket as a whole as in will the socket now behave like a non-blocking socket since this call is made with this flag?

I mean will the recv on the blocking socket starts behaving like a non-blocking recv?

Or will the effects of this flag will only last for the requested single send call?

Answer 1

The flags supplied to sendmsg() will affect the sendmsg() call only.