MQ_UNLINK
Section: POSIX Programmer's Manual (P)
Updated: 2003
NAME
mq_unlink - remove a message queue (REALTIME)
SYNOPSIS
#include <mqueue.h>
int mq_unlink(const char *name);
DESCRIPTION
The mq_unlink() function shall remove the message queue named
by the pathname name. After a successful call to
mq_unlink() with name, a call to mq_open() with
name shall fail
if the flag O_CREAT is not set in flags. If one or more processes
have the message queue open when mq_unlink() is
called, destruction of the message queue shall be postponed until
all references to the message queue have been closed.
Calls to mq_open() to recreate the message queue may fail until
the message queue
is actually removed. However, the mq_unlink() call need not
block until all references have been closed; it may return
immediately.
RETURN VALUE
Upon successful completion, the function shall return a value of zero.
Otherwise, the named message queue shall be unchanged by
this function call, and the function shall return a value of -1 and
set errno to indicate the error.
ERRORS
The mq_unlink() function shall fail if:
- EACCES
-
Permission is denied to unlink the named message queue.
- ENAMETOOLONG
-
The length of the name argument exceeds {PATH_MAX} or a pathname
component is longer than {NAME_MAX}.
- ENOENT
-
The named message queue does not exist.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
mq_close() , mq_open() , msgctl() , msgget()
, msgrcv() , msgsnd() , the Base Definitions volume of
IEEE Std 1003.1-2001, <mqueue.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 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 .
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- EXAMPLES
-
- APPLICATION USAGE
-
- RATIONALE
-
- FUTURE DIRECTIONS
-
- SEE ALSO
-
- COPYRIGHT
-
This document was created by
man2html,
using the manual pages.
Time: 07:35:08 GMT, March 26, 2013