mq_unlink(3p) [suse man page]

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 correspond-
       ing 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 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 func-
       tion 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 Technol-
       ogy -- 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)

Check Out this Related Man Page

mq_unlink(3RT)															    mq_unlink(3RT)

NAME

       mq_unlink - remove a message queue

SYNOPSIS

       cc [ flag... ] file... -lrt [ library... ]
       #include <mqueue.h>

       int mq_unlink(const char *name);

       The  mq_unlink() function removes the message queue named by the pathname name. After a successful call to mq_unlink() with name, a call to
       mq_open(3RT) with name fails 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 is postponed until all references to the message queue have been closed. Calls to mq_open(3RT)
       to re-create 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.

       Upon  successful  completion,  mq_unlink() returns 0; otherwise, the named message queue is not changed by this function call, the function
       returns -1 and sets errno to indicate the error.

       The  mq_unlink() function will fail if:

       EACCES		       Permission is denied to unlink the named message queue.

       ENAMETOOLONG	       The length of the name  string  exceeds	 PATH_MAX,  or	a  pathname  component	is  longer  than   NAME_MAX  while
			       _POSIX_NO_TRUNC is in effect.

       ENOENT		       The named message queue, name, does not exist.

       ENOSYS		       mq_unlink() is not supported by the system.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

       mqueue.h(3HEAD), mq_close(3RT), mq_open(3RT), attributes(5), standards(5)

       Solaris 2.6 was the first release to support the Asynchronous Input and Output option. Prior to this release, this function always returned
       -1 and set errno to ENOSYS.

								    28 Jun 2002 						    mq_unlink(3RT)

Linux and UNIX Man Pages

mq_unlink(3p) [suse man page]

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