mq_close (2)

Leading comments

Copyright (c) 2005 David Xu <davidxu@FreeBSD.org>
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice(s), this list of conditions and the following disclaimer as
   the first lines of this file unmodified other than the possible
   addition of one or more copyright notices.
2. Redistributions in b...

(The comments found at the beginning of the groff file "man2/mq_close.2freebsd".)

NAME

mq_close - close a message queue (REALTIME)

LIBRARY

Lb librt

SYNOPSIS

In mqueue.h Ft int Fn mq_close mqd_t mqdes

DESCRIPTION

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

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

RETURN VALUES

Rv -std

ERRORS

The Fn mq_close system call will fail if:

Bq Er EBADF

The Fa mqdes argument is not a valid message queue descriptor.

SEE ALSO

mq_open2, mq_unlink2

STANDARDS

The Fn mq_close system call conforms to St -p1003.1-2004 .

HISTORY

Support for POSIX message queues first appeared in Fx 7.0 .

COPYRIGHT

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 www.opengroup.org/unix/online.html