You can use (GNU-)tar for this. It even keeps track of other bits like
ext2fs attributes, AFAIK.
> On the other hand..., maybe I'm being "selfish", and this is the right way to
> go. You never write to it, so why track the write bits?
Yes, I would consider this "selfish" ;-)
> (One answer is maybe later we can create a writable cramfs, but
> oh well)
This could then be solved with union mount and cramfs mount over
ramfs or any other writable Unix style fs.
Then we might need W bits, but currently they disturb things like
"test" and the perl equivalent, which is quite annoying and
complexifies code. (Yes, I'm selfish too ;-))
See what Linus and Al think about this.
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