summaryrefslogtreecommitdiff
path: root/isohybrid-bg2
diff options
context:
space:
mode:
Diffstat (limited to 'isohybrid-bg2')
-rwxr-xr-xisohybrid-bg2164
1 files changed, 0 insertions, 164 deletions
diff --git a/isohybrid-bg2 b/isohybrid-bg2
deleted file mode 100755
index 79eb28c..0000000
--- a/isohybrid-bg2
+++ /dev/null
@@ -1,164 +0,0 @@
-#!/usr/bin/perl
-# Post-process an ISO 9660 image generated with mkisofs/genisoimage
-# to allow "hybrid booting" as a CD-ROM or as a hard disk.
-#
-# This is isohybrid-bg2 - written by Andreas Loibl <andreas@andreas-loibl.de>
-#
-# It works for ISO images with BURG or GRUB2. For ISO images with
-# syslinux/isolinux use isohybrid (written by H. Peter Anvin)
-#
-# isohybrid-bg2 is based on isohybrid:
-## -----------------------------------------------------------------------
-##
-## Copyright 2002-2008 H. Peter Anvin - All Rights Reserved
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, Inc., 53 Temple Place Ste 330,
-## Boston MA 02111-1307, USA; either version 2 of the License, or
-## (at your option) any later version; incorporated herein by reference.
-##
-## -----------------------------------------------------------------------
-
-# 512byte boot.img
-$mbr='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';
-
-($file) = @ARGV;
-open(FILE, "+< $file\0") or die "$0: cannot open $file: $!\n";
-binmode FILE;
-
-# search pattern to find location of boot.isohybrid on ISO image
-$pattern="ACRITOX!"x64;
-$p=0;
-while($p++ < 0xffff)
-{
- seek(FILE, $p*512, SEEK_SET) or die "$0: $file: $!\n";
- read(FILE, $sector, 512) == 512 or die "$0: $file: read error\n";
- if($sector eq $pattern)
- {
- seek(FILE, 0, SEEK_SET) or die "$0: $file: $!\n";
- print FILE pack('H*',$mbr);
- $boot_offset = hex(substr($mbr,2,2));
- seek(FILE, $boot_offset - 0x7, SEEK_SET) or die "$0: $file: $!\n";
- print FILE pack("V", $p+1);
- seek(FILE, $p*512 + 0x3f4, SEEK_SET) or die "$0: $file: $!\n";
- print FILE pack("V", $p+2);
- last;
- }
-}
-if($p>0xffff) {
- die "$0: error: $file does not contain boot.isohybrid in its first 32MB!\n";
-}
-
-# Use this fake geometry (zipdrive-style...)
-$h = 64; $s = 32;
-
-sub get_random() {
- # Get a 32-bit random number
- my $rfd, $rnd;
- my $rid;
-
- if (open($rfd, "< /dev/urandom\0") && read($rfd, $rnd, 4) == 4) {
- $rid = unpack("V", $rnd);
- }
-
- close($rfd) if (defined($rfd));
- return $rid if (defined($rid));
-
- # This sucks but is better than nothing...
- return ($$+time()) & 0xffffffff;
-}
-
-#
-# First, actually figure out where mkisofs hid isolinux.bin
-#
-seek(FILE, 17*2048, SEEK_SET) or die "$0: $file: $!\n";
-read(FILE, $boot_record, 2048) == 2048 or die "$0: $file: read error\n";
-($br_sign, $br_cat_offset) = unpack("a71V", $boot_record);
-if ($br_sign ne ("\0CD001\1EL TORITO SPECIFICATION" . ("\0" x 41))) {
- die "$0: $file: no boot record found\n";
-}
-seek(FILE, $br_cat_offset*2048, SEEK_SET) or die "$0: $file: $!\n";
-read(FILE, $boot_cat, 2048) == 2048 or die "$0: $file: read error\n";
-
-# We must have a Validation Entry followed by a Default Entry...
-# no fanciness allowed for the Hybrid mode [XXX: might relax this later]
-@ve = unpack("v16", $boot_cat);
-$cs = 0;
-for ($i = 0; $i < 16; $i++) {
- $cs += $ve[$i];
-}
-if ($ve[0] != 0x0001 || $ve[15] != 0xaa55 || $cs & 0xffff) {
- die "$0: $file: invalid boot catalog\n";
-}
-($de_boot, $de_media, $de_seg, $de_sys, $de_mbz1, $de_count,
- $de_lba, $de_mbz2) = unpack("CCvCCvVv", substr($boot_cat, 32, 32));
-if ($de_boot != 0x88 || $de_media != 0 ||
- ($de_segment != 0 && $de_segment != 0x7c0) || $de_count != 4) {
- die "$0: $file: unexpected boot catalog parameters\n";
-}
-# Get the total size of the image
-(@imgstat = stat(FILE)) or die "$0: $file: $!\n";
-$imgsize = $imgstat[7];
-if (!$imgsize) {
- die "$0: $file: cannot determine length of file\n";
-}
-# Target image size: round up to a multiple of $h*$s*512
-$cylsize = $h*$s*512;
-$frac = $imgsize % $cylsize;
-$padding = ($frac > 0) ? $cylsize - $frac : 0;
-$imgsize += $padding;
-$c = $imgsize/$cylsize;
-if ($c > 1024) {
- print STDERR "Warning: more than 1024 cylinders ($c).\n";
- print STDERR "Not all BIOSes will be able to boot this device.\n";
- $cc = 1024;
-} else {
- $cc = $c;
-}
-
-
-$mbr = pack("VV", $de_lba*4, 0);
-if (defined($id)) {
- $id = to_int($id);
-} else {
- $id = get_random();
-}
-$mbr .= pack("V", $id); # Offset 440: MBR ID
-$mbr .= "\0\0"; # Offset 446: actual partition table
-
-# Print partition table
-$psize = $c*$h*$s;
-$bhead = 0;
-$bsect = 1;
-$bcyl = 0;
-$ehead = $h-1;
-$esect = $s + ((($cc-1) & 0x300) >> 2);
-$ecyl = ($cc-1) & 0xff;
-$fstype = 0x83; # Linux (any better ideas?)
-$pentry = 1; # First partition slot
-
-for ( $i = 1 ; $i <= 4 ; $i++ ) {
- if ( $i == $pentry ) {
- $mbr .= pack("CCCCCCCCVV", 0x80, $bhead, $bsect, $bcyl, $fstype,
- $ehead, $esect, $ecyl, 0, $psize);
- } else {
- $mbr .= "\0" x 16;
- }
-}
-$mbr .= "\x55\xaa";
-
-# Print the partition table
-seek(FILE, 432, SEEK_SET) or die "$0: $file: $!\n";
-print FILE $mbr;
-
-# Pad the image to a fake cylinder boundary
-seek(FILE, $imgstat[7], SEEK_SET) or die "$0: $file: $!\n";
-if ($padding) {
- print FILE "\0" x $padding;
-}
-
-# Done...
-close(FILE);
-
-exit 0;