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#!/usr/bin/perl -w
# udfhd.pl - partition and format a hard disk using UDF
# Copyright (C) 2010 Pieter Wuille
#
# Changes in TeX Live:
# 2014- Norbert Preining
# - error handling for missing arguments
#
# 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, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
use strict;
use Fcntl qw(SEEK_SET SEEK_END);
my $SECTORSIZE=512;
sub encode_lba {
my ($lba) = @_;
my $res=pack("V",$lba);
return $res;
}
sub encode_chs {
my ($lba,$heads,$sects) = @_;
my $C= $lba/($heads*$sects);
$C=1023 if ($C>1023);
my $S=1+($lba % $sects);
my $H=($lba/$sects) % $heads;
my $res=pack("WWW",$H & 255,($S&63)|((($C/256)&3)*64),$C&255);
return $res;
}
sub encode_entry {
my ($begin_sect,$size_sect,$bootable,$type,$heads,$sects) = @_;
return (pack("W",0) x 16) if ($size_sect == 0);
my $res="";
if ($bootable) { $res=pack("W",0x80); } else { $res=pack("W",0); }
$res .= encode_chs($begin_sect,$heads,$sects);
$res .= pack("W",$type);
$res .= encode_chs($begin_sect+$size_sect-1,$heads,$sects);
$res .= encode_lba($begin_sect);
$res .= encode_lba($size_sect);
return $res;
}
sub generate_fmbr {
use integer;
my ($maxlba,$heads,$sects)=@_;
$maxlba -= ($maxlba % ($heads*$sects));
my $res=pack("W",0) x 440; # code section
$res .= pack("V",0); # disk signature
$res .= pack("W",0) x 2; # padding
$res .= encode_entry(0,$maxlba,0,0x0B,$heads,$sects); # primary partition spanning whole disk
$res .= pack("W",0) x 48; # 3 unused partition entries
$res .= pack("W",0x55); # signature part 1
$res .= pack("W",0xAA); # signature part 2
return ($res,$maxlba);
}
$|=1;
if (($#ARGV < 0) || (! -e $ARGV[0])) {
print "Syntax: $0 /dev/diskdevice [label] [size_in_bytes]\n";
exit 1;
}
my $udfpath="";
my $udftype;
if (-x "/usr/bin/mkudffs") { $udfpath="/usr/bin/mkudffs"; $udftype="mkudffs" }
if (-x "/sbin/newfs_udf") { $udfpath="/sbin/newfs_udf"; $udftype="newfs_udf" }
if (! defined($udftype)) {
print STDERR "Neither mkudffs or newfs_udf could be found. Exiting.";
}
my $dev=shift @ARGV;
my $label="UDF";
if (defined $ARGV[0]) {
$label=shift @ARGV;
}
open DISK,"+<",$dev || die "Cannot open '$dev' read/write: $!";
my $size=(-s $dev);
if (defined $ARGV[0]) {
$size=shift @ARGV;
}
if ($size<=0) {
$size=sysseek DISK, 0, 2;
sysseek DISK, 0, 0;
}
if ($size<=0) {
seek(DISK,0,SEEK_END) || die "Cannot seek to end of device: $!";
my $size=tell(DISK);
}
seek(DISK,0,SEEK_SET) || die "Cannot seek to begin of device: $!";
$size = (-s $dev) if ($size<=0);
if ($size<=0) {
die "Cannot calculate device size, please use: $0 device label [size_in_bytes]";
}
print "Writing MBR...";
my ($mbr,$maxlba) = generate_fmbr($size/$SECTORSIZE,255,63);
print DISK $mbr || die "Cannot write MBR: $!";
print "done\n";
print "Cleaning first 4096 sectors...";
for (my $i=1; $i<4096; $i++) {
print DISK (pack("W",0)x$SECTORSIZE) || die "Cannot clear sector $i: $!";
}
print "done\n";
close DISK || die "Cannot close disk device: $!";
print "Creating $maxlba-sector UDF v2.01 filesystem with label '$label' on $dev using $udftype...\n";
if ($udftype eq "mkudffs") {
system($udfpath,"--blocksize=$SECTORSIZE","--udfrev=0x0201","--lvid=$label","--vid=$label","--media-type=hd","--utf8",$dev,$maxlba);
} elsif ($udftype eq "newfs_udf") {
system($udfpath,"-b",$SECTORSIZE,"-m","blk","-t","ow","-s",$maxlba,"-r","2.01","-v",$label,"--enc","utf8",$dev);
}
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