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



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

NNAAMMEE
       shutdown -- shut down socket send and receive operations

SSYYNNOOPPSSIISS
       #include <sys/socket.h>

       int shutdown(int _s_o_c_k_e_t, int _h_o_w);

DDEESSCCRRIIPPTTIIOONN
       The _s_h_u_t_d_o_w_n() function shall cause all or part of a full-duplex
       connection on the socket associated with the file descriptor _s_o_c_k_e_t to
       be shut down.

       The _s_h_u_t_d_o_w_n() function takes the following arguments:

       _s_o_c_k_e_t      Specifies the file descriptor of the socket.

       _h_o_w         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 _s_h_u_t_d_o_w_n() function disables subsequent send and/or receive
       operations on a socket, depending on the value of the _h_o_w argument.

RREETTUURRNN VVAALLUUEE
       Upon successful completion, _s_h_u_t_d_o_w_n() shall return 0; otherwise, -1
       shall be returned and _e_r_r_n_o set to indicate the error.

EERRRROORRSS
       The _s_h_u_t_d_o_w_n() function shall fail if:

       EEBBAADDFF  The _s_o_c_k_e_t argument is not a valid file descriptor.

       EEIINNVVAALL The _h_o_w argument is invalid.

       EENNOOTTCCOONNNN
              The socket is not connected.

       EENNOOTTSSOOCCKK
              The _s_o_c_k_e_t argument does not refer to a socket.

       The _s_h_u_t_d_o_w_n() function may fail if:

       EENNOOBBUUFFSS
              Insufficient resources were available in the system to perform
              the operation.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

EEXXAAMMPPLLEESS
       None.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       None.

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _g_e_t_s_o_c_k_o_p_t(), _p_s_e_l_e_c_t(), _r_e_a_d(), _r_e_c_v(), _r_e_c_v_f_r_o_m(), _r_e_c_v_m_s_g(), _s_e_n_d(),
       _s_e_n_d_t_o(), _s_e_t_s_o_c_k_o_p_t(), _s_o_c_k_e_t(), _w_r_i_t_e()

       The Base Definitions volume of POSIX.1-2017, <<ssyyss__ssoocckkeett..hh>>

CCOOPPYYRRIIGGHHTT
       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(3)
