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MQ_CLOSE(3P)               POSIX Programmer's Manual              MQ_CLOSE(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
       mq_close -- close a message queue (REALTIME)
SYNOPSIS
       #include <mqueue.h>
       int mq_close(mqd_t mqdes);
DESCRIPTION
       The mq_close() function shall remove the association between  the  mes-
       sage  queue  descriptor,  mqdes,  and its message queue. The results of
       using this message queue descriptor after successful return  from  this
       mq_close(),  and until the return of this message queue descriptor from
       a subsequent mq_open(), are undefined.
       If the process has successfully attached a notification request to  the
       message queue via this mqdes, this attachment shall be removed, and the
       message queue is available for another process to attach for  notifica-
       tion.
RETURN VALUE
       Upon  successful  completion,  the  mq_close()  function shall return a
       value of zero; otherwise, the function shall return a value of  -1  and
       set errno to indicate the error.
ERRORS
       The mq_close() function shall fail if:
       EBADF  The mqdes argument is not a valid message queue descriptor.
       The following sections are informative.
EXAMPLES
       None.
APPLICATION USAGE
       None.
RATIONALE
       None.
FUTURE DIRECTIONS
       None.
SEE ALSO
       mq_open(), mq_unlink(), msgctl(), msgget(), msgrcv(), msgsnd()
       The Base Definitions volume of POSIX.1-2008, <mqueue.h>
COPYRIGHT
       Portions  of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri-
       cal  and  Electronics  Engineers,  Inc  and  The  Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum  1  applied.)  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.unix.org/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.ker-
       nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group                  2013                         MQ_CLOSE(3P)