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 .