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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: 3aba44a75dd565b192f7328f2a0150a313de3cc1)

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>
This commit is contained in:
Alberto Planas 2023-06-19 08:42:48 +02:00 committed by Richard Purdie
parent a75cd36f39
commit cc2c3b1b62
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