shutdown

SYNOPSIS
       #include <sys/socket.h>

       int shutdown(int socket, int how);


DESCRIPTION
       The  shutdown()  function shall cause all or part of a full-duplex con-
       nection on the socket associated with the file descriptor socket to  be
       shut down.

       The shutdown() function takes the following arguments:

       socket Specifies the file descriptor of the socket.

       how    Specifies the type of shutdown. The values are as follows:

       SHUT_RD
              Disables further receive operations.

       SHUT_WR
              Disables further send operations.

       SHUT_RDWR
              Disables further send and receive operations.



       The  shutdown() function disables subsequent send and/or receive opera-
       tions on a socket, depending on the value of the how argument.

RETURN VALUE
       Upon successful completion, shutdown() shall return  0;  otherwise,  -1
       shall be returned and errno set to indicate the error.

ERRORS
       The shutdown() function shall fail if:

       EBADF  The socket argument is not a valid file descriptor.

       EINVAL The how argument is invalid.

       ENOTCONN
              The socket is not connected.

       ENOTSOCK
              The socket argument does not refer to a socket.


       The shutdown() function may fail if:

       ENOBUFS
              Insufficient  resources  were available in the system to perform

       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       getsockopt() , read() , recv() , recvfrom() , recvmsg()  ,  select()  ,
       send()  , sendto() , setsockopt() , socket() , write() , the Base Defi-
       nitions volume of IEEE Std 1003.1-2001, <sys/socket.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in  electronic  form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
       event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard
       is  the  referee document. The original Standard can be obtained online
       at http://www.opengroup.org/unix/online.html .



IEEE/The Open Group                  2003                          SHUTDOWN(P)