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#!/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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