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1'\" t
2.\" Hey Emacs! This file is -*- nroff -*- source.
3.\"
4.\" Copyright (C) 2006 Michael Kerrisk <mtk-manpages@gmx.net>
5.\"
6.\" Permission is granted to make and distribute verbatim copies of this
7.\" manual provided the copyright notice and this permission notice are
8.\" preserved on all copies.
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10.\" Permission is granted to copy and distribute modified versions of this
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12.\" entire resulting derived work is distributed under the terms of a
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c13182ef 14.\"
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15.\" Since the Linux kernel and libraries are constantly changing, this
16.\" manual page may be incorrect or out-of-date. The author(s) assume no
17.\" responsibility for errors or omissions, or for damages resulting from
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18.\" the use of the information contained herein.
19.\"
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20.\" Formatted or processed versions of this manual, if unaccompanied by
21.\" the source, must acknowledge the copyright and authors of this work.
22.\"
23.TH MQ_CLOSE 3 2006-02-25 "Linux 2.6.16" "Linux Programmer's Manual"
24.SH NAME
25mq_close \- close a message queue descriptor
26.SH SYNOPSIS
27.nf
28.B #include <mqueue.h>
29.sp
30.BI "mqd_t mq_close(mqd_t " mqdes );
31.fi
32.SH DESCRIPTION
33.BR mq_close ()
34closes the message queue descriptor
35.IR mqdes .
36
c13182ef 37If the calling process has attached a notification request
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38to this message queue via
39.IR mqdes ,
c13182ef 40then this request is removed,
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41and another process can now attach a notification request.
42.SH NOTES
43All open message queues are automatically closed on process termination,
44or upon
45.BR execve (2).
46.SH RETURN VALUE
47On success
48.BR mq_close ()
49returns 0; on error, \-1 is returned, with
c13182ef 50.I errno
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51set to indicate the error.
52.SH ERRORS
53.TP
54.B EBADF
c13182ef 55The descriptor specified in
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56.I mqdes
57is invalid.
58.SH CONFORMING TO
59POSIX.1-2001.
60.SH "SEE ALSO"
61.BR mq_getattr (3),
62.BR mq_notify (3),
63.BR mq_open (3),
64.BR mq_receive (3),
65.BR mq_send (3),
66.BR mq_unlink (3),
67.BR mq_overview (7)