Index: rpm2cpio
===================================================================
RCS file: /v/rpm/cvs/rpm/scripts/rpm2cpio,v
retrieving revision 1.2
retrieving revision 1.2.2.1
diff -u -u -r1.2 -r1.2.2.1
--- rpm/scripts/rpm2cpio	25 May 2007 18:34:16 -0000	1.2
+++ rpm/scripts/rpm2cpio	10 Jun 2007 11:43:39 -0000	1.2.2.1
@@ -23,4 +23,14 @@
 hdrsize=`expr 8 + 16 \* $il + $dl`
 o=`expr $o + $hdrsize`
 
-dd if=$pkg ibs=$o skip=1 2>/dev/null | gunzip
+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