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Subject: RE: initramfs buffer spec -- third draft
From: Norbert Kiesel <nkiesel@tbdnetworks.com>
To: linux-kernel@vger.kernel.org
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Date: 13 Jan 2002 13:42:26 -0800
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H. Peter Anvin wrote:
>               initramfs buffer format
>               -----------------------
>
>               Al Viro, H. Peter Anvin
>              Last revision: 2002-01-13
>
>       ** DRAFT ** DRAFT ** DRAFT ** DRAFT ** DRAFT ** DRAFT **
.....
>The full format of the initramfs buffer is defined by the following
>grammar, where:
>    *    is used to indicate "0 or more occurrences of"
>    (|)    indicates alternatives
>    +    indicates concatenation
>    GZIP()    indicates the gzip(1) of the operand
>    ALGN(n)    means padding with null bytes to an n-byte boundary
>
>    initramfs  :=3D ("\0" | cpio_archive | cpio_gzip_archive)*
>
>    cpio_gzip_archive :=3D GZIP(cpio_archive)
>
>    cpio_archive :=3D cpio_file* + (<nothing> | cpio_trailer)
>
>    cpio_file :=3D ALGN(4) + cpio_header + filename + "\0" + ALGN(4) +
data
>
>    cpio_trailer :=3D ALGN(4) + cpio_header + "TRAILER!!!\0" + ALGN(4)


what's the purpose of the "*" behind cpio_file in the cpio_archive
definition?  There is already repetition in the initramfs and the "*"
behind cpio_archive would e.g. allow a sequence of cpio_trailers
without  any cpio_file inbetween.

--nk

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