rpmextract/trunk/rpm2cpio

   1 #!/bin/sh
   2
   3 pkg=$1
   4 if [ "$pkg" = "" -o ! -e "$pkg" ]; then
   5   echo "no package supplied" 1>&2
   6   exit 1
   7 fi
   8
   9 leadsize=96
  10 o=`expr $leadsize + 8`
  11 set `od -j $o -N 8 -t u1 $pkg`
  12 il=`expr 256 \* \( 256 \* \( 256 \* $2 + $3 \) + $4 \) + $5`
  13 dl=`expr 256 \* \( 256 \* \( 256 \* $6 + $7 \) + $8 \) + $9`
  14 # echo "sig il: $il dl: $dl"
  15
  16 sigsize=`expr 8 + 16 \* $il + $dl`
  17 o=`expr $o + $sigsize + \( 8 - \( $sigsize \% 8 \) \) \% 8 + 8`
  18 set `od -j $o -N 8 -t u1 $pkg`
  19 il=`expr 256 \* \( 256 \* \( 256 \* $2 + $3 \) + $4 \) + $5`
  20 dl=`expr 256 \* \( 256 \* \( 256 \* $6 + $7 \) + $8 \) + $9`
  21 # echo "hdr il: $il dl: $dl"
  22
  23 hdrsize=`expr 8 + 16 \* $il + $dl`
  24 o=`expr $o + $hdrsize`
  25
  26 dd if=$pkg ibs=$o skip=1 2>/dev/null