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SHUTDOWN(3P)               POSIX Programmer's Manual              SHUTDOWN(3P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the  corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.
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  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
              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(3P)