[Biococoa-dev] opening greyed out files

Koen van der Drift kvddrift at earthlink.net
Fri Dec 23 15:11:32 EST 2005

On Dec 23, 2005, at 2:12 PM, Tenzin Togden wrote:

> I was mistakenly expecting the source for SetFile functions to be  
> available as an example.
> This article http://www.macosxguru.net/article.php? 
> story=20031122090109169  suggests
> "NSFileManager has the instance method - (BOOL)changeFileAttributes: 
> (NSDictionary *)attributes atPath:(NSString *)path. The key to set  
> file permissions is NSFilePosixPermissions and its value must be  
> aNSNumber with an int value, the 9 right most bits describing the  
> permissions.
> You can also use the Carbon functions FSGetCatalogInfo and  
> FSSetCatalogInfo, but you probably don't want to link to Carbon  
> only for that purpose, and of course the POSIX functions chmod and  
> fchmod. (man 2 chmod)."
> and the NSFileManager documentation possibly has the answer here,
> http://www.toodarkpark.org/computers/objc/Foundation/Classes/ 
> NSFileManager.html
> Tenzin

Thanks for the links. Any idea if changeFileAttributes will  
permanently change the file permissions? In that case it might not be  
a good approach, because it could change the System files. Anyway,  
I'll have a go with it and see if I can make the files appear in the  
open file dialog.

BTW, any idea what the approach of TextWrangler/BBEdit could be?  
These programs have a popup in the OpenDialog, where you can select  
'All Files'. Only after selecting that option, the files become  


- Koen.

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