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mq_close(3) [v7 man page]

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

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 Linux 2017-09-15 MQ_CLOSE(3)

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mq_close(3C)						   Standard C Library Functions 					      mq_close(3C)

mq_close - close a message queue SYNOPSIS
#include <mqueue.h> int mq_close(mqd_t mqdes); DESCRIPTION
The mq_close() function removes 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(3C), are undefined. If the process (or thread) has successfully attached a notification request to the message queue via this mqdes, this attachment is removed and the message queue is available for another process to attach for notification. RETURN VALUES
Upon successful completion, mq_close() returns 0; otherwise, the function returns -1 and sets errno to indicate the error condition. ERRORS
The mq_close() function will fail if: EBADF The mqdes argument is an invalid message queue descriptor. ENOSYS The mq_open() function is not supported by the system. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ |ATTRIBUTE TYPE |ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ |Standard |See standards(5). | +-----------------------------+-----------------------------+ SEE ALSO
mqueue.h(3HEAD), mq_notify(3C), mq_open(3C), mq_unlink(3C), attributes(5), standards(5) NOTES
Solaris 2.6 was the first release to support the Asynchronous Input and Output option. Prior to this release, this function always returned -1 and set errno to ENOSYS. SunOS 5.11 5 Feb 2008 mq_close(3C)
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