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diff --git a/scripts/rpm2cpio.sh b/scripts/rpm2cpio.sh
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index 4531271cc..74aeed851 100755
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--- a/scripts/rpm2cpio.sh
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+++ b/scripts/rpm2cpio.sh
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@@ -15,13 +15,23 @@ _dd() {
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}
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calcsize() {
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+
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+ case "$(_dd $1 bs=4 count=1 | tr -d '\0')" in
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+ "$(printf '\216\255\350')"*) ;; # '\x8e\xad\xe8'
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+ *) fatal "File doesn't look like rpm: $pkg" ;;
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+ esac
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+
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offset=$(($1 + 8))
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local i b b0 b1 b2 b3 b4 b5 b6 b7
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i=0
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while [ $i -lt 8 ]; do
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- b="$(_dd $(($offset + $i)) bs=1 count=1)"
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+ # add . to not loose \n
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+ # strip \0 as it gets dropped with warning otherwise
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+ b="$(_dd $(($offset + $i)) bs=1 count=1 | tr -d '\0' ; echo .)"
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+ b=${b%.} # strip . again
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+
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[ -z "$b" ] &&
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b="0" ||
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b="$(exec printf '%u\n' "'$b")"
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@@ -33,7 +43,7 @@ calcsize() {
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offset=$(($offset + $rsize))
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}
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-case "$(_dd 0 bs=8 count=1)" in
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+case "$(_dd 0 bs=4 count=1 | tr -d '\0')" in
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"$(printf '\355\253\356\333')"*) ;; # '\xed\xab\xee\xdb'
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*) fatal "File doesn't look like rpm: $pkg" ;;
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esac
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@@ -44,11 +54,11 @@ sigsize=$rsize
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calcsize $(($offset + (8 - ($sigsize % 8)) % 8))
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hdrsize=$rsize
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-case "$(_dd $offset bs=3 count=1)" in
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- "$(printf '\102\132')"*) _dd $offset | bunzip2 ;; # '\x42\x5a'
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- "$(printf '\037\213')"*) _dd $offset | gunzip ;; # '\x1f\x8b'
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- "$(printf '\375\067')"*) _dd $offset | xzcat ;; # '\xfd\x37'
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- "$(printf '\135\000')"*) _dd $offset | unlzma ;; # '\x5d\x00'
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- "$(printf '\050\265')"*) _dd $offset | unzstd ;; # '\x28\xb5'
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- *) fatal "Unrecognized rpm file: $pkg" ;;
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+case "$(_dd $offset bs=2 count=1 | tr -d '\0')" in
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+ "$(printf '\102\132')") _dd $offset | bunzip2 ;; # '\x42\x5a'
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+ "$(printf '\037\213')") _dd $offset | gunzip ;; # '\x1f\x8b'
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+ "$(printf '\375\067')") _dd $offset | xzcat ;; # '\xfd\x37'
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+ "$(printf '\135')") _dd $offset | unlzma ;; # '\x5d\x00'
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+ "$(printf '\050\265')") _dd $offset | unzstd ;; # '\x28\xb5'
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+ *) fatal "Unrecognized payload compression format in rpm file: $pkg" ;;
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esac
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