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The
call causes all or part of a full-duplex connection on the socket associated
with to be shut down. If is 0, further receives will be disallowed. If
is 1, further sends will be disallowed. If is 2, further sends and receives
will be disallowed.
A 0 is returned if the call succeeds, -1 if
it fails.
The call succeeds unless: is not a valid descriptor.
is a file, not a socket. The specified socket is not connected.
The function call appeared in
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