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mq_close(3)                Library Functions Manual                mq_close(3)

NAME
       mq_close - close a message queue descriptor

LIBRARY
       Real-time library (librt, -lrt)

SYNOPSIS
       #include <mqueue.h>

       int mq_close(mqd_t mqdes);

DESCRIPTION
       mq_close() closes the message queue descriptor mqdes.

       If  the calling process has attached a notification request (see mq_no-
       tify(3)) to this message queue via mqdes, then this request is removed,
       and another process can now attach a notification request.

RETURN VALUE
       On  success  mq_close() returns 0; on error, -1 is returned, with errno
       set to indicate the error.

ERRORS
       EBADF  The message queue descriptor specified in mqdes is invalid.

ATTRIBUTES
       For an  explanation  of  the  terms  used  in  this  section,  see  at-
       tributes(7).

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |mq_close()                                  | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+

STANDARDS
       POSIX.1-2008.

HISTORY
       POSIX.1-2001.

NOTES
       All  open  message  queues are automatically closed on process termina-
       tion, or upon execve(2).

SEE ALSO
       mq_getattr(3),  mq_notify(3),  mq_open(3),  mq_receive(3),  mq_send(3),
       mq_unlink(3), mq_overview(7)

Linux man-pages 6.04              2023-03-30                       mq_close(3)

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