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fix(payload): switch raw payload metadata fields from u32 to u64

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vxtls 2026-03-15 13:31:19 -04:00
parent b8785e3742
commit c742563d3b
4 changed files with 73 additions and 60 deletions
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16
README.rst
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@ -71,9 +71,9 @@ Without using Python:
reach the importer; the rest of the distfiles live in ``external.img``.
* Header magic: ``LBPAYLD1`` (8 bytes).
* Then: little-endian ``u32`` file count.
* Repeated for each file: little-endian ``u32`` name length,
little-endian ``u32`` file size, raw file name bytes, raw file bytes.
* Then: little-endian ``u64`` file count.
* Repeated for each file: little-endian ``u64`` name length,
little-endian ``u64`` file size, raw file name bytes, raw file bytes.
* With ``--repo``, the second disk remains an ext3 distfiles/repo disk.
* Without ``--external-sources`` and without ``--repo``, no second disk is
@ -104,21 +104,21 @@ with ``--external-sources`` (and no ``--repo``).
out="${1:-external.img}"
list="${2:-external.list}"
write_u32le() {
write_u64le() {
v="$1"
printf '%08x' "$v" | sed -E 's/(..)(..)(..)(..)/\4\3\2\1/' | xxd -r -p
printf '%016x' "$v" | sed -E 's/(..)(..)(..)(..)(..)(..)(..)(..)/\8\7\6\5\4\3\2\1/' | xxd -r -p
}
count="$(wc -l < "${list}" | tr -d ' ')"
: > "${out}"
printf 'LBPAYLD1' >> "${out}"
write_u32le "${count}" >> "${out}"
write_u64le "${count}" >> "${out}"
while read -r name path; do
[ -n "${name}" ] || continue
size="$(wc -c < "${path}" | tr -d ' ')"
write_u32le "${#name}" >> "${out}"
write_u32le "${size}" >> "${out}"
write_u64le "${#name}" >> "${out}"
write_u64le "${size}" >> "${out}"
printf '%s' "${name}" >> "${out}"
cat "${path}" >> "${out}"
done < "${list}"