On Oct 14, 2007, at 5:43 AM, Anders F Björklund wrote:

> Bernhard Rosenkraenzer wrote:
>
>>   $ cvs diff -u -r1.2 -r1.3 rpm2cpio
>>   --- rpm/scripts/rpm2cpio	25 May 2007 18:34:16 -0000	1.2
>>   +++ rpm/scripts/rpm2cpio	12 Oct 2007 19:50:37 -0000	1.3
>
>>    +else
>>   +	# Most versions of file don't support LZMA, therefore we assume
>>   +	# anything not detected is LZMA
>>   +	DECOMPRESSOR="lzmash -d -c"
>>   +fi
>>   +
>>   +dd if=$pkg ibs=$o skip=1 2>/dev/null | $DECOMPRESSOR
>
> Shouldn't this use the new "lzma" command from LZMA Utils 4.32,
> rather than the old "lzmash" shell wrapper script for LZMA SDK ?
> (the old "lzma" command from LZMA Utils 4.27 and/or LZMA SDK has
> now been renamed as "lzma_alone" instead, to avoid name conflicts)
>

(aside) It never ceases to amaze me how much effort
is put into toy scripts like gendiff and rpm2cpio in
order to make them perfect. Scripts are disposable,
just like diapers are.

Here's an alternative rpm2cpio script from PLD:

======================================
#!/bin/sh

pkg=$1
if [ "$pkg" = "" -o ! -e "$pkg" ]; then
     echo "no package supplied" 1>&2
    exit 1
fi

leadsize=96
o=`expr $leadsize + 8`
set `od -j $o -N 8 -t u1 $pkg`
il=`expr 256 \* \( 256 \* \( 256 \* $2 + $3 \) + $4 \) + $5`
dl=`expr 256 \* \( 256 \* \( 256 \* $6 + $7 \) + $8 \) + $9`
# echo "sig il: $il dl: $dl"

sigsize=`expr 8 + 16 \* $il + $dl`
o=`expr $o + $sigsize + \( 8 - \( $sigsize \% 8 \) \) \% 8 + 8`
set `od -j $o -N 8 -t u1 $pkg`
il=`expr 256 \* \( 256 \* \( 256 \* $2 + $3 \) + $4 \) + $5`
dl=`expr 256 \* \( 256 \* \( 256 \* $6 + $7 \) + $8 \) + $9`
# echo "hdr il: $il dl: $dl"

hdrsize=`expr 8 + 16 \* $il + $dl`
o=`expr $o + $hdrsize`

comp=$(dd if="$pkg" ibs=$o skip=1 count=1 2>/dev/null \
       | dd bs=3 count=1 2> /dev/null)

gz="$(echo -en '\037\0213')"
case "$comp" in
     BZh)      dd if="$pkg" ibs=$o skip=1 2>/dev/null | bunzip2 ;;
     "$gz"*)   dd if="$pkg" ibs=$o skip=1 2>/dev/null | gunzip ;;
     # no magic in old lzma format, if unknown we assume that's lzma  
for now
     *)        dd if="$pkg" ibs=$o skip=1 2>/dev/null | lzma d -si - 
so ;;
     #*)        echo "Unrecognized rpm file: $pkg"; return 1 ;;
esac
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