How do I obtain read access to a file that I'm not allowed access?

FROM : Alan Smith
DATE : Sun Aug 06 04:03:20 2006

Disclaimer: I know some of this is not specific to Cocoa but I do know
that you people will be able to help me. I'm not on the Carbon-dev
list (if there still is one) and was hesitant to join it for just this
one question because I don't know if it is still active. I hope this
is an askable question here and that I'm not forced to look elsewhere.

I need a fast directory enumerator. So, I remembered
UKDirectoryEnumerator but, was disappointed to find it could only go
one "level." Being a complete programmer at heart I didn't give up and
started to modify the code to read all directories. I have modified it
to work correctly and efficiently (I hope) as possible but there are
some directories that I'm being denied access. From the following code
I get this message:

UKDirectoryEnumerator::nextObjectFullPath - MacOS Error ID= -5000

The error code docs say:

User does not have the correct access to the file
Directory cannot be shared

So, I looked around and found:

OSErr PBHOpenDenySync(HParmBlkPtr paramBlock);

After examination I'm mystified whether or not it will work. First
off, is a "data fork" what I want? I don't think I heading the right
way. I'm very confused as to what I should do to solve my problem.

Once this is finished I'll be sure to let the whole world have it. It
is much better than NSDirectoryEnumerator already, I tested it.

Thanks in advance, Alan

-(id)nextObjectFullPath
{
    NSString *path = nil;

    if (enny != nil)
    {
        path = [enny nextObjectFullPath];
    }
    if (path == nil)
    {
        [enny dealloc];
        enny = nil;
    }

    if( currIndex >= foundItems )
    {
        OSErr err = FSGetCatalogInfoBulk( iterator, cacheSize, &foundItems,
                                    NULL, whichInfo, infoCache,
                                    cache, (FSSpec*) NULL,
(HFSUniStr255*) NULL);
        if( err != noErr && err != errFSNoMoreItems )
        {
            NSLog(@"UKDirectoryEnumerator::nextObjectFullPath - MacOS
Error ID= %d",err);
            return nil;
        }

        currIndex = 0;
        if( foundItems == 0 )
        {
            if( err != errFSNoMoreItems )
                NSLog(@"UKDirectoryEnumerator::nextObjectFullPath -
FSCatalogInfoBulk returned 0 items, but not errFSNoMoreItems.");
                        return nil;
        }
    }

    if (enny == nil)
    {
        path = [NSString stringWithFSRef: &(cache[currIndex++])];

        BOOL isDir = NO;

        [[NSFileManager defaultManager] fileExistsAtPath: path
isDirectory: &isDir];


        if (isDir)
        {
            enny = [[UKDirectoryEnumerator alloc] initWithPath: path];
        }
    }

    if (path == nil)
    {
        path = [NSString stringWithFSRef: &(cache[currIndex++])];
    }
    return path;
}

--
// Quotes from yours truly -------------------------
"You don't forget, you just don't remember."
"Maturity resides in the mind."
"Silence is the Universe's greatest gift."
"Don't waste your life doing things others have already done."