plucky (3) mq_close.3posix.gz

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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 message 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
       notification.


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.1‐2017, <mqueue.h>


       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 .