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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 .