mq_close - Online Linux Manual PageSection : 3
Updated : 2022-12-15
Source : Linux man-pages 6.03

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NAMEmq_close − close a message queue descriptor

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LIBRARYReal-time library (librt, −lrt)

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SYNOPSIS#include <mqueue.h>int mq_close(mqd_t mqdes);

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DESCRIPTIONmq_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.

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RETURN VALUEOn success mq_close() returns 0; on error, −1 is returned, with errno set to indicate the error.

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ERRORSEBADF  The message queue descriptor specified in mqdes is invalid.

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ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7). InterfaceAttributeValue mq_close() Thread safetyMT-Safe

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STANDARDSPOSIX.1-2001, POSIX.1-2008.

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NOTESAll open message queues are automatically closed on process termination, or upon execve(2).

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SEE ALSOmq_getattr(3), mq_notify(3), mq_open(3), mq_receive(3), mq_send(3), mq_unlink(3), mq_overview(7) 0

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