cpio and tar are loosing flags (and a panic message without
Emanuel.strobl at gmx.net
Sat Aug 27 10:31:42 GMT 2005
Am Samstag, 27. August 2005 06:58 CEST schrieb Matthew Dillon:
> :Thank you, I know cpdup but I haven't known that it's flags aware!
> :Unfortunately I need to write to a raw device, I guess there's no way
> : for=20 cpdup without a filesystem...
> :I guess cpio and tar really should take care about flags. Am I wrong?
> cpio won't do it, tar won't do it, dump only does whole partitions,
> cpdup is not an archiver. Hmm.
> I can think of two possibilities. First, use a MFS or VN block
> device, create a filesystem, and use cpdup, then gzip the file
> representing the backing store. Since the extra space in the filesystem
> will contain zeros (you should make sure it does, that is), it should
> compress pretty well. Second, use cpio and then do a separate 'find' or
> 'ls' or something to get the chflags info and write a script that
> restores the flags after unpacking.
> They are both pretty narley solutions.
> Hmm.. wait a sec... I just thought up of another possibility... take
> the tar or cpio source code and modify it to also save and restore
> the chflags data. It won't be a 'standard' utility any more, but it
> WILL work for your needs. Call it by another name so there's no
> confusion. That might be your best bet, actually.
Right, and you can be sure, I had that done already if I spoke c.
But if I understand you correctly, it is intended that cpio doesn't hanlde
file flags? And (bsb)tar too? Then what are flags good for if no
application makes use of them?
For now I think I have to be happy with my script solution, at least it
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