mq_close(3p) — Linux manual page

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
       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(3p), mq_unlink(3p), msgctl(3p), msgget(3p), msgrcv(3p),
       msgsnd(3p)

       The Base Definitions volume of POSIX.1‐2017, mqueue.h(0p)

COPYRIGHT

       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(3P)

Pages that refer to this page: mqueue.h(0p), _Exit(3p), mq_open(3p), mq_unlink(3p), msgctl(3p), msgget(3p), msgrcv(3p), msgsnd(3p)

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