| '\" t |
| .\" Copyright (C) 2006 Michael Kerrisk <mtk.manpages@gmail.com> |
| .\" |
| .\" %%%LICENSE_START(VERBATIM) |
| .\" Permission is granted to make and distribute verbatim copies of this |
| .\" manual provided the copyright notice and this permission notice are |
| .\" preserved on all copies. |
| .\" |
| .\" Permission is granted to copy and distribute modified versions of this |
| .\" manual under the conditions for verbatim copying, provided that the |
| .\" entire resulting derived work is distributed under the terms of a |
| .\" permission notice identical to this one. |
| .\" |
| .\" Since the Linux kernel and libraries are constantly changing, this |
| .\" manual page may be incorrect or out-of-date. The author(s) assume no |
| .\" responsibility for errors or omissions, or for damages resulting from |
| .\" the use of the information contained herein. The author(s) may not |
| .\" have taken the same level of care in the production of this manual, |
| .\" which is licensed free of charge, as they might when working |
| .\" professionally. |
| .\" |
| .\" Formatted or processed versions of this manual, if unaccompanied by |
| .\" the source, must acknowledge the copyright and authors of this work. |
| .\" %%%LICENSE_END |
| .\" |
| .TH MQ_CLOSE 3 2017-09-15 "Linux" "Linux Programmer's Manual" |
| .SH NAME |
| mq_close \- close a message queue descriptor |
| .SH SYNOPSIS |
| .nf |
| .B #include <mqueue.h> |
| .PP |
| .BI "int mq_close(mqd_t " mqdes ); |
| .fi |
| .PP |
| Link with \fI\-lrt\fP. |
| .SH DESCRIPTION |
| .BR mq_close () |
| closes the message queue descriptor |
| .IR mqdes . |
| .PP |
| If the calling process has attached a notification request (see |
| .RB ( mq_notify (3)) |
| to this message queue via |
| .IR mqdes , |
| then this request is removed, |
| and another process can now attach a notification request. |
| .SH RETURN VALUE |
| On success |
| .BR mq_close () |
| returns 0; on error, \-1 is returned, with |
| .I errno |
| set to indicate the error. |
| .SH ERRORS |
| .TP |
| .B EBADF |
| The message queue descriptor specified in |
| .I mqdes |
| is invalid. |
| .SH ATTRIBUTES |
| For an explanation of the terms used in this section, see |
| .BR attributes (7). |
| .TS |
| allbox; |
| lb lb lb |
| l l l. |
| Interface Attribute Value |
| T{ |
| .BR mq_close () |
| T} Thread safety MT-Safe |
| .TE |
| .SH CONFORMING TO |
| POSIX.1-2001, POSIX.1-2008. |
| .SH NOTES |
| All open message queues are automatically closed on process termination, |
| or upon |
| .BR execve (2). |
| .SH SEE ALSO |
| .BR mq_getattr (3), |
| .BR mq_notify (3), |
| .BR mq_open (3), |
| .BR mq_receive (3), |
| .BR mq_send (3), |
| .BR mq_unlink (3), |
| .BR mq_overview (7) |
