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rpm2cpio.sh: update to the last 4.x version

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openSUSE RPMs are compressing the RPM payload using zstd, that
correspond to the magic ID 0x28, 0xb5, 0x2f.

This patch update the script to the last version from the rpm project,
and add support to this compression format, and extract the cpio payload
using the "unzstd" binary.

(From OE-Core rev: 9c0d66e693aa7ab8b3f2a3c68764e4ab6159c085)

Signed-off-by: Alberto Planas <aplanas@suse.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 3aba44a75dd565b192f7328f2a0150a313de3cc1)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
This commit is contained in:
Alberto Planas 2023-06-19 08:42:48 +02:00 committed by Steve Sakoman
parent 28fa51bcf0
commit bbd85cd9f4
1 changed files with 20 additions and 10 deletions
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30
scripts/rpm2cpio.sh
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@ -7,7 +7,7 @@ fatal() {
}
pkg="$1"
[ -n "$pkg" -a -e "$pkg" ] ||
[ -n "$pkg" ] && [ -e "$pkg" ] ||
fatal "No package supplied"
_dd() {
@ -16,14 +16,23 @@ _dd() {
}
calcsize() {
case "$(_dd $1 bs=4 count=1 | tr -d '\0')" in
"$(printf '\216\255\350')"*) ;; # '\x8e\xad\xe8'
*) fatal "File doesn't look like rpm: $pkg" ;;
esac
offset=$(($1 + 8))
local i b b0 b1 b2 b3 b4 b5 b6 b7
i=0
while [ $i -lt 8 ]; do
b=$(_dd $(($offset + $i)) bs=1 count=1; echo X)
b=${b%X}
# add . to not loose \n
# strip \0 as it gets dropped with warning otherwise
b="$(_dd $(($offset + $i)) bs=1 count=1 | tr -d '\0' ; echo .)"
b=${b%.} # strip . again
[ -z "$b" ] &&
b="0" ||
b="$(exec printf '%u\n' "'$b")"
@ -35,7 +44,7 @@ calcsize() {
offset=$(($offset + $rsize))
}
case "$(_dd 0 bs=8 count=1)" in
case "$(_dd 0 bs=4 count=1 | tr -d '\0')" in
"$(printf '\355\253\356\333')"*) ;; # '\xed\xab\xee\xdb'
*) fatal "File doesn't look like rpm: $pkg" ;;
esac
@ -46,10 +55,11 @@ sigsize=$rsize
calcsize $(($offset + (8 - ($sigsize % 8)) % 8))
hdrsize=$rsize
case "$(_dd $offset bs=3 count=1)" in
"$(printf '\102\132')"*) _dd $offset | bzip2 -d ;; # '\x42\x5a'
"$(printf '\037\213')"*) _dd $offset | gunzip ;; # '\x1f\x8b'
"$(printf '\375\067')"*) _dd $offset | xzcat ;; # '\xfd\x37'
"$(printf '\135\000')"*) _dd $offset | unlzma ;; # '\x5d\x00'
*) fatal "Unrecognized rpm file: $pkg" ;;
case "$(_dd $offset bs=2 count=1 | tr -d '\0')" in
"$(printf '\102\132')") _dd $offset | bunzip2 ;; # '\x42\x5a'
"$(printf '\037\213')") _dd $offset | gunzip ;; # '\x1f\x8b'
"$(printf '\375\067')") _dd $offset | xzcat ;; # '\xfd\x37'
"$(printf '\135')") _dd $offset | unlzma ;; # '\x5d\x00'
"$(printf '\050\265')") _dd $offset | unzstd ;; # '\x28\xb5'
*) fatal "Unrecognized payload compression format in rpm file: $pkg" ;;
esac