mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-18 10:35:55 +00:00
86 lines
2.6 KiB
Groff
86 lines
2.6 KiB
Groff
.\" Copyright (c) 2005 David Xu <davidxu@FreeBSD.org>
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice(s), this list of conditions and the following disclaimer as
|
|
.\" the first lines of this file unmodified other than the possible
|
|
.\" addition of one or more copyright notices.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice(s), this list of conditions and the following disclaimer in
|
|
.\" the documentation and/or other materials provided with the
|
|
.\" distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
|
|
.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
|
|
.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
|
.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
|
.\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
|
.\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd November 29, 2005
|
|
.Dt MQ_CLOSE 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm mq_close
|
|
.Nd "close a message queue (REALTIME)"
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In mqueue.h
|
|
.Ft int
|
|
.Fn mq_close "mqd_t mqdes"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn mq_close
|
|
system call removes the association between the message queue descriptor,
|
|
.Fa mqdes ,
|
|
and its message queue.
|
|
The results of using this message queue descriptor
|
|
after successful return from this
|
|
.Fn mq_close ,
|
|
and until the return of this message queue descriptor from a subsequent
|
|
.Fn mq_open ,
|
|
are undefined.
|
|
.Pp
|
|
If the process has successfully attached a notification request to the
|
|
message queue via this
|
|
.Fa mqdes ,
|
|
this attachment will be removed, and the message queue is available for
|
|
another process to attach for notification.
|
|
.Sh RETURN VALUES
|
|
.Rv -std
|
|
.Sh ERRORS
|
|
The
|
|
.Fn mq_close
|
|
system call
|
|
will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EBADF
|
|
The
|
|
.Fa mqdes
|
|
argument is not a valid message queue descriptor.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr mq_open 2 ,
|
|
.Xr mq_unlink 2
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn mq_close
|
|
system call conforms to
|
|
.St -p1003.1-2004 .
|
|
.Sh HISTORY
|
|
Support for
|
|
.Tn POSIX
|
|
message queues first appeared in
|
|
.Fx 7.0 .
|