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Re: AppleDouble format
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Re: AppleDouble format


  • Subject: Re: AppleDouble format
  • From: Markus Hitter <email@hidden>
  • Date: Tue, 6 Nov 2001 01:26:17 +0100

At 16:40 -0600 on 05/11/2001, Charles Srstka wrote:

Yes, but in my case I am sometimes going to end up with an AppleDouble-encoded file on an HFS volume. Don't ask me why. It is unavoidable.

Is your volume exported to the network? If you export it with some data-only thing like NFS, the resource capability is unseen by the client. Then, the ._files are created even on HFS+.



Am Montag den, 5. November 2001, um 23:54, schrieb Rainer Brockerhoff:

I'm not sure if the .-file contains only the resource fork itself, or also other stuff.

See, what you could find in the OS X Development @ OmniGroup list archive:

Am Samstag den, 30. Juni 2001, um 00:14, schrieb Peter Bierman:

The ._file is AppleDouble format (the non-data-fork part).

It is NOT just a plain resource fork in a data fork. It also includes the other filesystem metadata.

There is plenty of documentation about AppleDouble on the web.

With some luck, the ._file stuff is somewhere in Darwin sources, but I didn't have a look yet.


But I suppose that the ._file also contains other metadata... in that case you'll probably have to extract the resource fork part first somehow.

You can easily see this if you copy data-only files with the Finder. Then, the Finder creates a small (50 bytes?) ._file for each of them.



Cheers,
Markus

- - - - - - - - - - - - - - - - - - -
Dipl. Ing. Markus Hitter
http://www.jump-ing.de/


References: 
 >Re: AppleDouble format (From: Rainer Brockerhoff <email@hidden>)

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