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_no-
tify(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 attrib-
utes(7).
┌───────────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├───────────────────────────────────────────┼───────────────┼─────────┤
│ mq_close() │ Thread safety │ MT-Safe │
└───────────────────────────────────────────┴───────────────┴─────────┘
STANDARDS
POSIX.1-2008.
HISTORY
POSIX.1-2001.
NOTES
All open message queues are automatically closed on process termina-
tion, 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 man-pages 6.7 2023-10-31 mq_close(3)
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