ultrix man page for mq_close

MQ_CLOSE(3)						     Linux Programmer's Manual						       MQ_CLOSE(3)

NAME
       mq_close - close a message queue descriptor

SYNOPSIS
       #include <mqueue.h>

       int mq_close(mqd_t mqdes);

       Link with -lrt.

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 |
       +-----------+---------------+---------+
CONFORMING TO
       POSIX.1-2001, POSIX.1-2008.

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)

COLOPHON
       This page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and  the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

Linux								    2017-09-15							       MQ_CLOSE(3)