NAME

       shutdown - shut down socket send and receive operations

SYNOPSIS

       #include <sys/socket.h>

       int shutdown(int socket, int how);

DESCRIPTION

       The shutdown() function shall cause all or part of a full-duplex connection 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 operations 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 the operation.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       getsockopt()  ,  read() , recv() , recvfrom() , recvmsg() , select() , send() , sendto() , setsockopt() ,
       socket() , write() , the Base Definitions 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)