shutdown - shut down part of a full-duplex connection
cc [ flag... ] file... –lsocket –lnsl [ library... ] #include <sys/socket.h> int shutdown(int s, int how);
The shutdown() call shuts down all or part of a full-duplex connection on the socket associated with s. If how is SHUT_RD, further receives are disallowed. If how is SHUT_WR, further sends are disallowed. If how is SHUT_RDWR, further sends and receives are disallowed.
The how values should be defined constants.
0 is returned if the call succeeds.
−1 is returned if the call fails.
The call succeeds unless one of the following conditions exists:
The s value is not a valid file descriptor.
Insufficient user memory is available for the operation to complete.
Insufficient STREAMS resources are available for the operation to complete.
The specified socket is not connected.
The s value is not a socket.
See attributes(5) for descriptions of the following attributes: