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mq_close(3) [minix 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(3P)						     POSIX Programmer's Manual						      MQ_CLOSE(3P)

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing 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
mq_open(), mq_unlink(), msgctl(), msgget(), msgrcv(), msgsnd(), the Base Definitions volume of IEEE Std 1003.1-2001, <mqueue.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 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 . IEEE
/The Open Group 2003 MQ_CLOSE(3P)
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