update text, add screenshots, add a copy of geteltorito script
Evgeny Zinoviev
5 years ago
parent
97d4ccbe17
commit
5977203387
Binary file not shown.
|
After Width: | Height: | Size: 88 KiB |
Binary file not shown.
|
After Width: | Height: | Size: 89 KiB |
Binary file not shown.
|
After Width: | Height: | Size: 84 KiB |
Binary file not shown.
|
After Width: | Height: | Size: 89 KiB |
Binary file not shown.
|
After Width: | Height: | Size: 86 KiB |
Binary file not shown.
|
After Width: | Height: | Size: 78 KiB |
@ -0,0 +1,228 @@
|
||||
#!/usr/bin/perl
|
||||
|
||||
use Getopt::Std;
|
||||
|
||||
#
|
||||
# geteltorito.pl: a bootimage extractor
|
||||
# Script that will extract the first El Torito bootimage from a
|
||||
# bootable CD image
|
||||
# R. Krienke 08/2001
|
||||
# krienke@uni-koblenz.de
|
||||
# License: GPL
|
||||
#
|
||||
# Get latest version from:
|
||||
# http://userpages.uni-koblenz.de/~krienke/ftp/noarch/geteltorito
|
||||
#
|
||||
$utilVersion="0.6";
|
||||
#
|
||||
# Version 0.6
|
||||
# 2015/02/25
|
||||
# I included a patch by Daniel Kekez, daniel.kekez@utoronto.ca to make geteltorito
|
||||
# better compatible with windows:
|
||||
# "To run this Perl script using using Strawberry Perl under Windows, I
|
||||
# found it was necessary to explicitly open the files in binary mode since
|
||||
# Windows will default to text mode when open() is called."
|
||||
# Version 0.5
|
||||
# 2009/06/22
|
||||
# A patch for harddisk emulation images from <colimit@gmail.com>.
|
||||
# For BootMediaType=4 (harddisk emulation) SectorCount is always 1, and geteltorito.pl
|
||||
# returns just MBR. This patch guesses the correct bootimage size
|
||||
# from MBR (offset+size of the first partitition).
|
||||
# Version 0.4
|
||||
# 2007/02/01
|
||||
# A patch from Santiago Garcia <manty@debian.org> to use a virtual sector
|
||||
# size (vSecSize) of 512 bytes, as defined on "El Torito" specs and change
|
||||
# unpack of the sector count from n to v to get the correct sector count.
|
||||
# Version 0.3
|
||||
# 2006/02/21
|
||||
# A patch from Ben Collins <bcollins@ubuntu.com> to make the
|
||||
# utility work on PPC machines (change from 'L'-encoding in pack to 'V')
|
||||
# Version 0.2
|
||||
# Several patches included from Nathan Stratton Treadway(nathant@ontko.com)
|
||||
# to adjust the platform output as well as fixes for other minor bugs
|
||||
# Version 0.1
|
||||
# Initial release
|
||||
#
|
||||
# For information on El Torito see
|
||||
# http://en.wikipedia.org/wiki/El_torito
|
||||
|
||||
$vSecSize=512;
|
||||
$secSize=2048;
|
||||
$ret=undef;$version=undef;$opt_h=undef;$loadSegment=undef;$systemType=undef;
|
||||
|
||||
#
|
||||
# Read a particular sector from a file
|
||||
# sector counting starts at 0, not 1
|
||||
#
|
||||
sub getSector{
|
||||
my ($secNum, $secCount, $file)=@_;
|
||||
my ($sec, $count);
|
||||
|
||||
open(FILE, "<:raw", $file) || die "Cannot open \"$file\" \n";
|
||||
|
||||
seek(FILE, $secNum*$secSize, 0);
|
||||
$count=read(FILE, $sec, $vSecSize*$secCount, 0) ;
|
||||
if( $count != $vSecSize*$secCount ){
|
||||
warn "Error reading from file \"$file\"\n";
|
||||
}
|
||||
close(FILE);
|
||||
|
||||
return($sec);
|
||||
}
|
||||
|
||||
|
||||
#
|
||||
# Write eltorito data into a file
|
||||
#
|
||||
sub writeOutputFile{
|
||||
my($name)=shift;
|
||||
my($value)=shift;
|
||||
|
||||
open(OUT, ">:raw", $name)|| die "$0: Cannot open outputfile \"$name\" for writing. Stop.";
|
||||
print OUT $value;
|
||||
close(OUT);
|
||||
}
|
||||
|
||||
|
||||
#
|
||||
# Usage
|
||||
#
|
||||
sub usage{
|
||||
warn "\n$0 [-hv] [-o outputfilename] cd-image \n",
|
||||
"Script will try to extract an El Torito image from a \n",
|
||||
"bootable CD (or cd-image) given by <cd-image> and write \n",
|
||||
"the data extracted to STDOUT or to a file.\n",
|
||||
" -h: This help. \n",
|
||||
" -v: Print version of script and exit.\n",
|
||||
" -o <file>: Write extracted data to file <file> instead of STDOUT.\n",
|
||||
"\n\n";
|
||||
exit 0;
|
||||
}
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------
|
||||
$ret=getopts('hvo:');
|
||||
|
||||
if( defined($opt_v) ){
|
||||
warn "Version: $utilVersion \n";
|
||||
exit 0;
|
||||
}
|
||||
|
||||
if( defined($opt_h) || $#ARGV <0 ){
|
||||
usage(0);
|
||||
}
|
||||
|
||||
if( defined($opt_o) ){
|
||||
$outputFilename="$opt_o";
|
||||
}
|
||||
|
||||
$imageFile=$ARGV[0];
|
||||
|
||||
if( ! -r $imageFile ){
|
||||
die "Cannot read image/device \"$imageFile\". Aborting\n";
|
||||
}
|
||||
|
||||
#
|
||||
# Read Sector 17 from CD which should contain a Boot Record Volume
|
||||
# descriptor. This descriptor contains at its start the text ($isoIdent)
|
||||
# CD001 and ($toritoSpec)
|
||||
# EL TORITO SPECIFICATION
|
||||
# see http://www.cdpage.com/Compact_Disc_Variations/eltoritoi.html
|
||||
# for details
|
||||
#
|
||||
|
||||
$sector=getSector(17, 1, $imageFile );
|
||||
($boot, $isoIdent, $version, $toritoSpec,
|
||||
$unUsed, $bootP)= unpack( "Ca5CA32A32V", $sector );
|
||||
|
||||
if( $isoIdent ne "CD001" || $toritoSpec ne "EL TORITO SPECIFICATION" ){
|
||||
die "This data image does not seem to be a bootable CD-image\n";
|
||||
}
|
||||
|
||||
#
|
||||
# Now fetch the sector of the booting catalog
|
||||
#
|
||||
$sector=getSector($bootP, 1, $imageFile );
|
||||
|
||||
print STDERR "Booting catalog starts at sector: $bootP \n";
|
||||
|
||||
# The first 32 bytes of this sector contains the validation entry for a
|
||||
# boot. The first byte has to be 01, the next byte determines the
|
||||
# architecture the image is designed for, where 00 is i86, 01 is PowerPC
|
||||
# and 02 is Mac. More data give info about manufacturer, etc. The
|
||||
# final two bytes must contain 0x55 and 0xAA respectively (as
|
||||
# defined by the El Torito standard).
|
||||
|
||||
$validateEntry=substr($sector, 0, 32);
|
||||
|
||||
($header, $platform, $unUsed, $manufact, $unUsed, $five, $aa)=
|
||||
unpack( "CCvA24vCC", $validateEntry);
|
||||
|
||||
if( $header != 1 || $five != 0x55 || $aa != 0xaa ){
|
||||
die "Invalid Validation Entry on image \n";
|
||||
}
|
||||
|
||||
print STDERR "Manufacturer of CD: $manufact\n";
|
||||
print STDERR "Image architecture: ";
|
||||
print STDERR "x86" if( $platform == 0 );
|
||||
print STDERR "PowerPC" if( $platform == 1 );
|
||||
print STDERR "Mac" if( $platform == 2 );
|
||||
print STDERR "unknown ($platform)" if( $platform > 2 );
|
||||
print STDERR "\n";
|
||||
|
||||
#
|
||||
# Now we examine the initial/defaultentry which follows the validate
|
||||
# entry and has a size of 32 bytes.
|
||||
|
||||
$initialEntry=substr($sector, 32, 32);
|
||||
|
||||
($boot, $media, $loadSegment, $systemType, $unUsed,
|
||||
$sCount, $imgStart, $unUsed)=unpack( "CCvCCvVC", $initialEntry);
|
||||
|
||||
if( $boot != 0x88 ){
|
||||
die "Boot indicator in Initial/Default-Entry is not 0x88. CD is not bootable. \n";
|
||||
}
|
||||
|
||||
print STDERR "Boot media type is: ";
|
||||
if( $media == 0 ){
|
||||
print STDERR "no emulation";
|
||||
$count=0;
|
||||
}
|
||||
if( $media == 1 ){
|
||||
print STDERR "1.2meg floppy";
|
||||
$count=1200*1024/$vSecSize;
|
||||
}
|
||||
if( $media == 2 ){
|
||||
print STDERR "1.44meg floppy";
|
||||
$count=1440*1024/$vSecSize;
|
||||
}
|
||||
if( $media == 3 ){
|
||||
print STDERR "2.88meg floppy";
|
||||
$count=2880*1024/$vSecSize;
|
||||
}
|
||||
if( $media == 4 ){
|
||||
print STDERR "harddisk";
|
||||
$MBR=getSector($imgStart, 1, $imageFile );
|
||||
$partition1=substr($MBR, 446, 16);
|
||||
($unUsed, $firstSector, $partitionSize) = unpack( "A8VV", $partition1);
|
||||
$count=$firstSector + $partitionSize;
|
||||
}
|
||||
print STDERR "\n";
|
||||
|
||||
# Only use the internal sector counter if the real size is unknown
|
||||
# ($count==0)
|
||||
$cnt=$count==0?$sCount:$count;
|
||||
|
||||
print STDERR "El Torito image starts at sector $imgStart and has $cnt sector(s) of $vSecSize Bytes\n";
|
||||
|
||||
# We are there:
|
||||
# Now read the bootimage to stdout
|
||||
$image=getSector($imgStart, $cnt, $imageFile);
|
||||
|
||||
if( length($outputFilename) ){
|
||||
writeOutputFile($outputFilename, $image);
|
||||
print STDERR "\nImage has been written to file \"$outputFilename\".\n";
|
||||
}else{
|
||||
print "$image";
|
||||
print STDERR "Image has been written to stdout ....\n";
|
||||
}
|
||||
Loading…
Reference in New Issue