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MQ_UNLINK(3P)              POSIX Programmer's Manual             MQ_UNLINK(3P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the  corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.
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  post-
       poned 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 immedi-
       ately.
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 .

IEEE/The Open Group                  2003                        MQ_UNLINK(3P)