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 correspond-
       ing 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 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 vol-
       ume 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 Technol-
       ogy -- 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)