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MQ_CLOSE(3) Linux Programmer's Manual MQ_CLOSE(3)
NAME
mq_close - close a message queue descriptor
SYNOPSIS
#include <mqueue.h>
int mq_close(mqd_t mqdes);
Link with -lrt.
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
EBADF 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 │
└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘
CONFORMING TO
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)
Linux 2021-03-22 MQ_CLOSE(3)