#!/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 <
rpm2cpio, perl version by orabidoo +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;