From d6b80e02c35442e1e234d6d62d79d33f998608ce Mon Sep 17 00:00:00 2001
From: Rafael Garcia-Suarez <rgarciasuarez@mandriva.org>
Date: Tue, 17 Aug 2004 23:50:10 +0000
Subject: Add a pure-perl version of rpm2cpio (for emergency cases), written by
 Roger Espel Llima. (from http://www.iagora.com/~espel/rpm2cpio)

---
 rpm2cpio.pl | 112 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 rpm2cpio.pl

diff --git a/rpm2cpio.pl b/rpm2cpio.pl
new file mode 100644
index 0000000..44fb462
--- /dev/null
+++ b/rpm2cpio.pl
@@ -0,0 +1,112 @@
+#!/usr/bin/perl
+
+# Copyright (C) 1997,1998,1999, Roger Espel Llima
+# 
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and any associated documentation files (the "Software"), to 
+# deal in the Software without restriction, including without limitation the 
+# rights to use, copy, modify, merge, publish, distribute, sublicense, 
+# and/or sell copies of the Software, and to permit persons to whom the 
+# Software is furnished to do so, subject to the following conditions:
+# 
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+# 
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+# SOFTWARE'S COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE
+
+# (whew, that's done!)
+
+# why does the world need another rpm2cpio?  because the existing one
+# won't build unless you have half a ton of things that aren't really
+# required for it, since it uses the same library used to extract RPM's.
+# in particular, it won't build on the HPsUX box i'm on.
+
+# sw 2002-Mar-6 Don't slurp the whole file
+
+# add a path if desired
+$gzip = "gzip";
+
+sub printhelp {
+  print <<HERE;
+rpm2cpio, perl version by orabidoo <odar\@pobox.com> +sw
+dumps the contents to stdout as a cpio archive
+
+use: rpm2cpio [file.rpm] > file.cpio
+
+Here's how to use cpio:
+     list of contents:   cpio -t -i < /file/name
+        extract files:   cpio -d -i < /file/name
+HERE
+
+  exit 0;
+}
+
+if ($#ARGV == -1) {
+  printhelp if -t STDIN;
+  $f = "STDIN";
+} elsif ($#ARGV == 0) {
+  open(F, "< $ARGV[0]") or die "Can't read file $ARGV[0]\n";
+  $f = 'F';
+} else {
+  printhelp;
+}
+
+printhelp if -t STDOUT;
+
+# gobble the file up
+##undef $/;
+##$|=1;
+##$rpm = <$f>;
+##close ($f);
+
+read $f,$rpm,96;
+
+($magic, $major, $minor, $crap) = unpack("NCC C90", $rpm);
+
+die "Not an RPM\n" if $magic != 0xedabeedb;
+die "Not a version 3 or 4 RPM\n" if $major != 3 && $major != 4;
+
+##$rpm = substr($rpm, 96);
+
+while (!eof($f)) {
+  $pos = tell($f);
+  read $f,$rpm,16;
+  $smagic = unpack("n", $rpm);
+  last if $smagic eq 0x1f8b;
+  # Turns out that every header except the start of the gzip one is
+  # padded to an 8 bytes boundary.
+  if ($pos & 0x7) {
+    $pos += 7;
+    $pos &= ~0x7;	# Round to 8 byte boundary
+    seek $f, $pos, 0;
+    read $f,$rpm,16;
+  }
+  ($magic, $crap, $sections, $bytes) = unpack("N4", $rpm);
+  die "Error: header not recognized\n" if $magic != 0x8eade801;
+  $pos += 16;		# for header
+  $pos += 16 * $sections;
+  $pos += $bytes;
+  seek $f, $pos, 0;
+}
+
+if (eof($f)) {
+  die "bogus RPM\n";
+}
+
+open(ZCAT, "|gzip -cd") || die "can't pipe to gzip\n";
+print STDERR "CPIO archive found!\n";
+
+print ZCAT $rpm;
+
+while (read($f, ($_=''), 16384) > 0) {
+  print ZCAT;
+}
+
+close ZCAT;
+
-- 
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