plucky (2) mq_close.2freebsd.gz

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NAME
     mq_close — close a message queue (REALTIME)


LIBRARY
     POSIX Real-time Library (librt, -lrt)


SYNOPSIS
     #include <mqueue.h>

     int
     mq_close(mqd_t mqdes);


DESCRIPTION
     The mq_close() system call removes the association between the message queue descriptor, mqdes, and its
     message queue.  The results of using this message queue descriptor after successful return from this
     mq_close(), and until the return of this message queue descriptor from a subsequent mq_open(), are
     undefined.

     If the process has successfully attached a notification request to the message queue via this mqdes, this
     attachment will be removed, and the message queue is available for another process to attach for
     notification.


RETURN VALUES
     Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global
     variable errno is set to indicate the error.


ERRORS
     The mq_close() system call will fail if:

     [EBADF]            The mqdes argument is not a valid message queue descriptor.


SEE ALSO
     mq_open(2), mq_unlink(2)


STANDARDS
     The mq_close() system call conforms to IEEE Std 1003.1-2004 (“POSIX.1”).


HISTORY
     Support for POSIX message queues first appeared in FreeBSD 7.0.


     Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2004 Edition,
     Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base
     Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers,
     Inc and The Open Group.  In the event of any discrepancy between this version and the original IEEE and The
     Open Group Standard, the original IEEE and The Open Group Standard is the referee document.  The original
     Standard can be obtained online at http://www.opengroup.org/unix/online.html.