This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

       None.

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group  Base
       Specifications  Issue  7, 2018 Edition, Copyright (C) 2018 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 .

       Any  typographical  or formatting errors that appear in this page are most likely to have been introduced
       during  the  conversion  of  the  source  files  to  man  page  format.  To  report  such   errors,   see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                                   2017                                     MQ_UNLINK(3POSIX)

       The  mq_unlink()  function  shall  remove  the  message  queue  named by the string name.  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. However, the mq_unlink() call
       need not block until all references have been closed; it may return immediately.

       After a successful call to mq_unlink(), reuse of the name shall subsequently cause mq_open() to behave as
       if no message queue of this name exists (that is, mq_open() will fail if O_CREAT  is  not  set,  or  will
       create a new message queue if O_CREAT is set).

       The mq_unlink() function shall fail if:

       EACCES Permission is denied to unlink the named message queue.

       EINTR  The call to mq_unlink() blocked waiting for all references to the named message queue to be closed
              and a signal interrupted the call.

       ENOENT The named message queue does not exist.

       The mq_unlink() function may fail if:

       ENAMETOOLONG
              The length of the name argument exceeds {_POSIX_PATH_MAX} on systems that do not support  the  XSI
              option  or  exceeds  {_XOPEN_PATH_MAX}  on XSI systems, or has a pathname component that is longer
              than  {_POSIX_NAME_MAX}  on  systems  that  do  not  support  the  XSI  option  or   longer   than
              {_XOPEN_NAME_MAX}  on  XSI  systems.  A call to mq_unlink() with a name argument that contains the
              same message queue name as was previously used in a successful mq_open() call shall  not  give  an
              [ENAMETOOLONG] error.

       Thefollowingsectionsareinformative.

       None.

       A  future  version  might  require  the  mq_open() and mq_unlink() functions to have semantics similar to
       normal file system operations.

       mq_unlink — remove a message queue (REALTIME)

       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.

       None.

       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.

mq_close(), mq_open(), msgctl(), msgget(), msgrcv(), msgsnd()

       The Base Definitions volume of POSIX.1‐2017, <mqueue.h>

       #include <mqueue.h>

       int mq_unlink(const char *name);