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_notify(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
       attributes(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
       termination, 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 6.7               2023-10-31                       mq_close(3)