NAME
       shutdown - shut down part of a full-duplex connection

SYNOPSIS
       #include <network.h>

       int shutdown(int s, int how);

DESCRIPTION
       The shutdown call causes all or part of a full-duplex con-
       nection on the socket associated with s to be  shut  down.
       If  how is 0, further receives will be disallowed.  If how
       is 1, further sends will be disallowed.  If how is 2, fur-
       ther sends and receives will be disallowed.

RETURN VALUE
       On  success,  zero is returned.  On error, -1 is returned,
       and errno is set appropriately.

ERRORS
       EBADF   s is not a valid descriptor.

       ENOTSOCK
               s is a file, not a socket.

       ENOTCONN
               The specified socket is not connected.