Re: Resource Fork - is this a good use/the right thing to do?
Re: Resource Fork - is this a good use/the right thing to do?
- Subject: Re: Resource Fork - is this a good use/the right thing to do?
- From: Uli Kusterer <email@hidden>
- Date: Wed, 23 Apr 2008 20:14:08 +0200
Am 23.04.2008 um 09:41 schrieb Daniel DeCovnick:
Thanks for the suggestion. I've just looked through them now, as
well as at the OSXBook (Mac OS X Internals: A Systems Approach by
Amit Singh) info on that. In theory it looks good, but it's somewhat
confusing. It looks like, at least in 10.4, except for the resource
fork which is mapped as a fake xattr, you can only have inline
attributes, with a length limit of 3802 bytes, and it would be quite
common for my data to be significantly larger than that. Does anyone
know if that's changed for 10.5?
You may want to look at the size limits on resource forks, though. I
thought I'd blogged about that ages ago, but can't find the posting
right now. The resource fork format is documented, though, so it
shouldn't be too hard to figure out. There's for example a 2727
resources limit on each file, and some offsets are 16-bit quantities.
So, it's not really a good idea to have resources of several megabytes
in size.
Cheers,
-- Uli Kusterer
"The Witnesses of TeachText are everywhere..."
http://www.zathras.de
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