MQ_CLOSE(3)                POSIX Programmer's Manual               MQ_CLOSE(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
       mq_close -- close a message queue (RREEAALLTTIIMMEE)

SSYYNNOOPPSSIISS
       #include <mqueue.h>

       int mq_close(mqd_t _m_q_d_e_s);

DDEESSCCRRIIPPTTIIOONN
       The _m_q___c_l_o_s_e() function shall remove the association between the
       message queue descriptor, _m_q_d_e_s, and its message queue. The results of
       using this message queue descriptor after successful return from this
       _m_q___c_l_o_s_e(), and until the return of this message queue descriptor from
       a subsequent _m_q___o_p_e_n(), are undefined.

       If the process has successfully attached a notification request to the
       message queue via this _m_q_d_e_s, this attachment shall be removed, and the
       message queue is available for another process to attach for
       notification.

RREETTUURRNN VVAALLUUEE
       Upon successful completion, the _m_q___c_l_o_s_e() function shall return a
       value of zero; otherwise, the function shall return a value of -1 and
       set _e_r_r_n_o to indicate the error.

EERRRROORRSS
       The _m_q___c_l_o_s_e() function shall fail if:

       EEBBAADDFF  The _m_q_d_e_s argument is not a valid message queue descriptor.

       _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
       _m_q___o_p_e_n(), _m_q___u_n_l_i_n_k(), _m_s_g_c_t_l(), _m_s_g_g_e_t(), _m_s_g_r_c_v(), _m_s_g_s_n_d()

       The Base Definitions volume of POSIX.1-2017, <<mmqquueeuuee..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                          MQ_CLOSE(3)
