mq_open Hanging

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LEARN ABOUT OSF1

mq_unlink

mq_unlink(3)						     Library Functions Manual						      mq_unlink(3)

NAME

       mq_unlink - Removes a message queue (P1003.1b)

LIBRARY

       Realtime Library (librt.so, librt.a)

SYNOPSIS

       #include <mqueue.h>

       int mq_unlink (
       const char *name);

PARAMETERS

       *name   Specifies a pointer to the pathname of a message queue.

DESCRIPTION

       The  mq_unlink  function  removes a message queue named by the pathname.  After a successful call to this function, subsequent calls to the
       mq_open function fail if they specify the queue identified by the name argument and the O_CREAT flag is not set.

       Close the connection to the queue with a call to the mq_close function before calling the mq_unlink function. If one or more processes have
       the  message  queue  open  when	mq_unlink  is  called, destruction of the queue is postponed until all references to the message queue are
       removed.  In this situation, the mq_unlink function returns immediately, without waiting for all queue references to be closed.

RETURN VALUES

       On successful completion, the function returns the value 0 (zero); otherwise, the function returns the value -1, sets errno to indicate the
       error, and the message queue remains.

ERRORS

       The mq_unlink function fails under the following conditions:

       [EACCES]       Permission is denied to unlink the message queue.

       [ENAMETOOLONG] The length of the name string exceeds {NAME_MAX} while {_POSIX_NO_TRUNC} is in effect.

       [ENOENT]       The named message queue does not exist.

       Additionally, any error that can be returned by the open or fstat file system calls can be returned by the mq_unlink function.

RELATED INFORMATION

       Functions: mq_close(3), mq_open(3)

       Guide to Realtime Programming delim off

																      mq_unlink(3)

Programming