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Re: A mystery with NSFileManager
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Re: A mystery with NSFileManager


  • Subject: Re: A mystery with NSFileManager
  • From: David Remahl <email@hidden>
  • Date: Sun, 24 Feb 2002 00:43:56 +0100

> The following lines:
>
> NSFileManager *fm = [NSFileManager defaultManager];
> BOOL isDirectory;
>
> NSLog(@"%@", [fm fileExistsAtPath:@"/tmp" isDirectory:&isDirectory] ?
> @"YES" : @"NO");
> NSLog(@"%@", isDirectory ? @"YES" : @"NO");
>
> produce the output:
>
> YES
> NO
>
> In other words, the -fileExistsAtPath:isDirectory: call returns
> success, but the isDirectory flag is set to NO -- it claims /tmp is not
> a directory. Now, there's nothing wrong with /tmp on my machine; it's
> sitting right there, it conatins some spam files I've made over the past
> days, I have rwx access to it.
> Is this a (bizarre) bug in NSFileManager, or am I missing something?
> Using @"/tmp/" returns YES for isDirectory, so it sure looks like a bug
> to me. Unfortunately, @"/tmp" is the form of the path returned by
> NSOpenPanel...
> Anybody have any comments? I don't know much about the Unix file
> system, maybe this is just ignorance on my part. Thanks!
>
> Ben Haller
> Stick Software

My guess is that the reason that /tmp returns NO, is that /tmp is really a
symlink to private/tmp. If you don't append the trailing /, then it is
treated as pointing to the actual 10bytes large link, not the directory it
represents....

I believe there are methods for resolving symlinks, and checking wether they
are symlinks...

/ david
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References: 
 >A mystery with NSFileManager (From: email@hidden)

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