summaryrefslogtreecommitdiffstats
path: root/contrib/syslinux/syslinux-4.03/utils/isohybrid.in
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/syslinux/syslinux-4.03/utils/isohybrid.in')
-rw-r--r--contrib/syslinux/syslinux-4.03/utils/isohybrid.in258
1 files changed, 0 insertions, 258 deletions
diff --git a/contrib/syslinux/syslinux-4.03/utils/isohybrid.in b/contrib/syslinux/syslinux-4.03/utils/isohybrid.in
deleted file mode 100644
index a127784..0000000
--- a/contrib/syslinux/syslinux-4.03/utils/isohybrid.in
+++ /dev/null
@@ -1,258 +0,0 @@
-#!/usr/bin/perl
-## -----------------------------------------------------------------------
-##
-## Copyright 2002-2008 H. Peter Anvin - All Rights Reserved
-## Copyright 2009 Intel Corporation; author: H. Peter Anvin
-##
-## 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.
-##
-## -----------------------------------------------------------------------
-
-#
-# Post-process an ISO 9660 image generated with mkisofs/genisoimage
-# to allow "hybrid booting" as a CD-ROM or as a hard disk.
-#
-
-use bytes;
-use Fcntl;
-
-# User-specifyable options
-%opt = (
- # Fake geometry (zipdrive-style...)
- 'h' => 64,
- 's' => 32,
- # Partition number
- 'entry' => 1,
- # Partition offset
- 'offset' => 0,
- # Partition type
- 'type' => 0x17, # "Windows hidden IFS"
- # MBR ID
- 'id' => undef,
-);
-
-%valid_range = (
- 'h' => [1, 256],
- 's' => [1, 63],
- 'entry' => [1, 4],
- 'offset' => [0, 64],
- 'type' => [0, 255],
- 'id' => [0, 0xffffffff],
- 'hd0' => [0, 2],
- 'partok' => [0, 1],
-);
-
-# Boolean options just set other options
-%bool_opt = (
- 'nohd0' => ['hd0', 0],
- 'forcehd0' => ['hd0', 1],
- 'ctrlhd0' => ['hd0', 2],
- 'nopartok' => ['partok', 0],
- 'partok' => ['partok', 1],
-);
-
-sub usage() {
- print STDERR "Usage: $0 [options] filename.iso\n",
- "Options:\n",
- " -h Number of default geometry heads\n",
- " -s Number of default geometry sectors\n",
- " -entry Specify partition entry number (1-4)\n",
- " -offset Specify partition offset (default 0)\n",
- " -type Specify partition type (default 0x17)\n",
- " -id Specify MBR ID (default random)\n",
- " -forcehd0 Always assume we are loaded as disk ID 0\n",
- " -ctrlhd0 Assume disk ID 0 if the Ctrl key is pressed\n",
- " -partok Allow booting from within a partition\n";
- exit 1;
-}
-
-# Parse a C-style integer (decimal/octal/hex)
-sub doh($) {
- my($n) = @_;
- return ($n =~ /^0/) ? oct $n : $n+0;
-}
-
-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;
-}
-
-sub get_hex_data() {
- my $mbr = '';
- my $line, $byte;
- while ( $line = <DATA> ) {
- chomp $line;
- last if ($line eq '*');
- foreach $byte ( split(/\s+/, $line) ) {
- $mbr .= chr(hex($byte));
- }
- }
- return $mbr;
-}
-
-while ($ARGV[0] =~ /^\-(.*)$/) {
- $o = $1;
- shift @ARGV;
- if (defined($bool_opt{$o})) {
- ($o, $v) = @{$bool_opt{$o}};
- $opt{$o} = $v;
- } elsif (exists($opt{$o})) {
- $opt{$o} = doh(shift @ARGV);
- if (defined($valid_range{$o})) {
- ($l, $h) = @{$valid_range{$o}};
- if ($opt{$o} < $l || $opt{$o} > $h) {
- die "$0: valid values for the -$o parameter are $l to $h\n";
- }
- }
- } else {
- usage();
- }
-}
-
-($file) = @ARGV;
-
-if (!defined($file)) {
- usage();
-}
-
-open(FILE, "+< $file\0") or die "$0: cannot open $file: $!\n";
-binmode FILE;
-
-#
-# 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";
-}
-
-# Now $de_lba should contain the CD sector number for isolinux.bin
-seek(FILE, $de_lba*2048+0x40, SEEK_SET) or die "$0: $file: $!\n";
-read(FILE, $ibsig, 4);
-if ($ibsig ne "\xfb\xc0\x78\x70") {
- die "$0: $file: bootloader does not have a isolinux.bin hybrid signature.".
- "Note that isolinux-debug.bin does not support hybrid booting.\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
-$h = $opt{'h'};
-$s = $opt{'s'};
-$cylsize = $h*$s*512;
-$frac = $imgsize % $cylsize;
-$padding = ($frac > 0) ? $cylsize - $frac : 0;
-$imgsize += $padding;
-$c = int($imgsize/$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 = $c;
-}
-
-# Preserve id when run again
-if (defined($opt{'id'})) {
- $id = pack("V", doh($opt{'id'}));
-} else {
- seek(FILE, 440, SEEK_SET) or die "$0: $file: $!\n";
- read(FILE, $id, 4);
- if ($id eq "\x00\x00\x00\x00") {
- $id = pack("V", get_random());
- }
-}
-
-# Print the MBR and partition table
-seek(FILE, 0, SEEK_SET) or die "$0: $file: $!\n";
-
-for ($i = 0; $i <= $opt{'hd0'}+3*$opt{'partok'}; $i++) {
- $mbr = get_hex_data();
-}
-if ( length($mbr) > 432 ) {
- die "$0: Bad MBR code\n";
-}
-
-$mbr .= "\0" x (432 - length($mbr));
-
-$mbr .= pack("VV", $de_lba*4, 0); # Offset 432: LBA of isolinux.bin
-$mbr .= $id; # Offset 440: MBR ID
-$mbr .= "\0\0"; # Offset 446: actual partition table
-
-# Print partition table
-$offset = $opt{'offset'};
-$psize = $c*$h*$s - $offset;
-$bhead = int($offset/$s) % $h;
-$bsect = ($offset % $s) + 1;
-$bcyl = int($offset/($h*$s));
-$bsect += ($bcyl & 0x300) >> 2;
-$bcyl &= 0xff;
-$ehead = $h-1;
-$esect = $s + ((($cc-1) & 0x300) >> 2);
-$ecyl = ($cc-1) & 0xff;
-$fstype = $opt{'type'}; # Partition type
-$pentry = $opt{'entry'}; # Partition slot
-
-for ( $i = 1 ; $i <= 4 ; $i++ ) {
- if ( $i == $pentry ) {
- $mbr .= pack("CCCCCCCCVV", 0x80, $bhead, $bsect, $bcyl, $fstype,
- $ehead, $esect, $ecyl, $offset, $psize);
- } else {
- $mbr .= "\0" x 16;
- }
-}
-$mbr .= "\x55\xaa";
-
-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;
-__END__
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-01 22:57:33 +0200