This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

       None.

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for  Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 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 .

       Any typographical or formatting errors that appear in this page are most likely to have  been  introduced
       during   the   conversion  of  the  source  files  to  man  page  format.  To  report  such  errors,  see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                                   2017                                      SHUTDOWN(3POSIX)

       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.

       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.

       Thefollowingsectionsareinformative.

       None.

       None.

       shutdown — shut down socket send and receive operations

       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.

       None.

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

getsockopt(), pselect(), read(), recv(), recvfrom(), recvmsg(), send(), sendto(), setsockopt(), socket(),
       write()

       The Base Definitions volume of POSIX.1‐2017, <sys_socket.h>

       #include <sys/socket.h>

       int shutdown(int socket, int how);