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MQ_CLOSE(3) Library Functions Manual MQ_CLOSE(3)

NAME

mq_close - close a message queue descriptor

LIBRARY

Real-time library (librt, -lrt)

SYNOPSIS

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

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

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

STANDARDS

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)

2022-10-09 Linux man-pages 6.01