The shutdown() call shuts down all or part of a full-duplex connection on the socket associated with s. If how is 0, then further receives will be disallowed. If how is 1, then further sends will be disallowed. If how is 2, then further sends and receives will be disallowed.

A 0 is returned if the call succeeds, -1 if it fails.

The call succeeds unless:

EBADF

s is not a valid file descriptor.

ENOMEM

There was insufficient user memory available for the operation to complete.

ENOSR

There were insufficient STREAMS resources available for the operation to complete.

ENOTCONN

The specified socket is not connected.

ENOTSOCK

s is not a socket.

See attributes(5) for descriptions of the following attributes:

connect(3SOCKET), socket(3SOCKET), attributes(5), socket(3HEAD)

The how values should be defined constants.