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Merge pull request #1860 from tlaurion/fix_initrd_unpack_for_repacking

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initrd/bin/unpack_initramfs.sh: add xz unpacking support.
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Thierry Laurion 2024-11-22 17:50:23 -05:00 committed by GitHub
commit 45696a4c8a
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1 changed files with 91 additions and 64 deletions
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initrd/bin/unpack_initramfs.sh
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@ -45,7 +45,10 @@ consume_zeros() {
unpack_cpio() { unpack_cpio() {
TRACE_FUNC TRACE_FUNC
(cd "$dest_dir"; cpio -i "${CPIO_ARGS[@]}" 2>/dev/null) (
cd "$dest_dir"
cpio -i "${CPIO_ARGS[@]}" 2>/dev/null
)
} }
# unpack the first segment of an archive, then write the rest to another file # unpack the first segment of an archive, then write the rest to another file
@ -87,6 +90,10 @@ unpack_first_segment() {
# walking all the compressed blocks. # walking all the compressed blocks.
gunzip | unpack_cpio gunzip | unpack_cpio
;; ;;
fd37*) # xz
DEBUG "archive segment $magic: xz"
unxz | unpack_cpio
;;
28b5*) # zstd 28b5*) # zstd
DEBUG "archive segment $magic: zstd" DEBUG "archive segment $magic: zstd"
# Like gunzip, this will not stop when reaching the end of the # Like gunzip, this will not stop when reaching the end of the
@ -96,6 +103,26 @@ unpack_first_segment() {
;; ;;
*) # unknown *) # unknown
die "Can't decompress initramfs archive, unknown type: $magic" die "Can't decompress initramfs archive, unknown type: $magic"
# The following are magic values for other compression formats
# but not added because not tested.
# TODO: open an issue for unsupported magic number reported on die.
#
#425a*) # bzip2
# DEBUG "archive segment $magic: bzip2"
# bunzip2 | unpack_cpio
#;;
#5d00*) # lzma
# DEBUG "archive segment $magic: lzma"
# unlzma | unpack_cpio
#;;
#894c*) # lzo
# DEBUG "archive segment $magic: lzo"
# lzop -d | unpack_cpio
#;;
#0221*) # lz4
# DEBUG "archive segment $magic: lz4"
# lz4 -d | unpack_cpio
# ;;
;; ;;
esac esac
) <"$unpack_archive" >"$rest_archive" ) <"$unpack_archive" >"$rest_archive"