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request: PAX CPIO support #430

@mcandre

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@mcandre

Hi,

I am trying to create macOS installers from scratch. These installers typically use application payloads which are PAX CPIO archived. However, none of the available cpio crates appear to support PAX format.

When a PAX compatible CPIO archive is written, then it is able to pass a validation check pax -v <test.cpio. When the file is wrapped in gzip, then it can even pass tar tzvf test.cpio.gz.

Would it be possible to extend the tar crate to handle PAX CPIO archives?

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