1 | #------------------------------------------------------------------------------
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2 | # File: ISO.pm
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3 | #
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4 | # Description: Read information from ISO 9660 disk images
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5 | #
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6 | # Revisions: 2016-04-07 - P. Harvey created
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7 | #
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8 | # References: 1) http://wiki.osdev.org/ISO_9660
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9 | #------------------------------------------------------------------------------
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10 |
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11 | package Image::ExifTool::ISO;
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12 |
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13 | use strict;
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14 | use vars qw($VERSION);
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15 | use Image::ExifTool qw(:DataAccess :Utils);
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16 |
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17 | $VERSION = '1.01';
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18 |
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19 | # trim trailing spaces and ignore tag if empty
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20 | my %rawStr = (
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21 | RawConv => sub {
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22 | my $val = shift;
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23 | $val =~ s/ +$//;
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24 | return length($val) ? $val : undef;
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25 | },
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26 | );
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27 |
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28 | # tag info for date/time tags
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29 | my %dateInfo = (
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30 | Format => 'undef[17]',
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31 | Groups => { 2 => 'Time' },
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32 | ValueConv => q{
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33 | return undef if $val !~ /[^0\0 ]/; # ignore if empty
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34 | if ($val =~ s/(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})(.)/$1:$2:$3 $4:$5:$6.$7/s) {
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35 | $val .= TimeZoneString(unpack('c', $8) * 15);
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36 | }
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37 | return $val;
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38 | },
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39 | PrintConv => '$self->ConvertDateTime($val)',
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40 | );
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41 |
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42 | # lookup for volume descriptor types
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43 | my %volumeDescriptorType = (
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44 | 0 => 'Boot Record',
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45 | 1 => 'Primary Volume',
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46 | 2 => 'Supplementary Volume',
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47 | 3 => 'Volume Partition',
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48 | 255 => 'Terminator',
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49 | );
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50 |
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51 | # ISO tags
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52 | %Image::ExifTool::ISO::Main = (
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53 | GROUPS => { 2 => 'Other' },
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54 | NOTES => 'Tags extracted from ISO 9660 disk images.',
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55 | 0 => {
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56 | Name => 'BootRecord',
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57 | SubDirectory => { TagTable => 'Image::ExifTool::ISO::BootRecord' },
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58 | },
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59 | 1 => {
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60 | Name => 'PrimaryVolume',
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61 | SubDirectory => { TagTable => 'Image::ExifTool::ISO::PrimaryVolume' },
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62 | },
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63 | );
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64 |
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65 | %Image::ExifTool::ISO::BootRecord = (
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66 | GROUPS => { 2 => 'Other' },
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67 | PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
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68 | # 0 => { Name => 'VolumeType', PrintConv => \%volumeDescriptorType }, # (0 for boot record)
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69 | # 1 => { Name => 'Identifier', Format => 'undef[5]' }, # (always "CD001")
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70 | # 6 => 'VolumeDesriptorVersion', # (always 1)
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71 | # always extract BootSystem, even if empty, as an indication that this is bootable
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72 | 7 => { Name => 'BootSystem', Format => 'string[32]', ValueConv => '$val=~s/ +$//; $val' },
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73 | 39 => { Name => 'BootIdentifier', Format => 'string[32]', %rawStr },
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74 | );
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75 |
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76 | %Image::ExifTool::ISO::PrimaryVolume = (
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77 | GROUPS => { 2 => 'Other' },
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78 | PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
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79 | # 0 => { Name => 'VolumeType', PrintConv => \%volumeDescriptorType }, # (1 for primary volume)
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80 | # 1 => { Name => 'Identifier', Format => 'undef[5]' }, # (always "CD001")
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81 | # 6 => 'VolumeDesriptorVersion', # (always 1)
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82 | 8 => { Name => 'System', Format => 'string[32]', %rawStr },
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83 | 40 => { Name => 'VolumeName', Format => 'string[32]', %rawStr },
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84 | 80 => { Name => 'VolumeBlockCount', Format => 'int32u' },
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85 | 120 => { Name => 'VolumeSetDiskCount', Format => 'int16u', Unknown => 1 },
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86 | 124 => { Name => 'VolumeSetDiskNumber', Format => 'int16u', Unknown => 1 },
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87 | 128 => { Name => 'VolumeBlockSize', Format => 'int16u' },
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88 | 132 => { Name => 'PathTableSize', Format => 'int32u', Unknown => 1 },
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89 | 140 => { Name => 'PathTableLocation', Format => 'int32u', Unknown => 1 },
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90 | 174 => {
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91 | Name => 'RootDirectoryCreateDate',
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92 | Format => 'undef[7]',
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93 | Groups => { 2 => 'Time' },
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94 | ValueConv => q{
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95 | my @a = unpack('C6c', $val);
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96 | $a[0] += 1900;
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97 | $a[6] = TimeZoneString($a[6] * 15);
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98 | return sprintf('%.4d:%.2d:%.2d %.2d:%.2d:%.2d%s', @a);
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99 | },
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100 | PrintConv => '$self->ConvertDateTime($val)',
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101 | },
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102 | 190 => { Name => 'VolumeSetName', Format => 'string[128]', %rawStr },
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103 | 318 => { Name => 'Publisher', Format => 'string[128]', %rawStr },
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104 | 446 => { Name => 'DataPreparer', Format => 'string[128]', %rawStr },
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105 | 574 => { Name => 'Software', Format => 'string[128]', %rawStr },
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106 | 702 => { Name => 'CopyrightFileName', Format => 'string[38]', %rawStr },
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107 | 740 => { Name => 'AbstractFileName', Format => 'string[36]', %rawStr },
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108 | 776 => { Name => 'BibligraphicFileName',Format => 'string[37]', %rawStr },
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109 | 813 => { Name => 'VolumeCreateDate', %dateInfo },
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110 | 830 => { Name => 'VolumeModifyDate', %dateInfo },
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111 | 847 => { Name => 'VolumeExpirationDate',%dateInfo },
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112 | 864 => { Name => 'VolumeEffectiveDate', %dateInfo },
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113 | #881 => 'FileStructureVersion', # (always 1)
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114 | );
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115 |
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116 | # ISO Composite tags
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117 | %Image::ExifTool::ISO::Composite = (
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118 | GROUPS => { 2 => 'Other' },
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119 | VolumeSize => {
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120 | Require => {
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121 | 0 => 'ISO:VolumeBlockCount',
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122 | 1 => 'ISO:VolumeBlockSize',
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123 | },
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124 | ValueConv => '$val[0] * $val[1]',
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125 | PrintConv => \&Image::ExifTool::ConvertFileSize,
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126 | },
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127 | );
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128 |
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129 | # add our composite tags
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130 | Image::ExifTool::AddCompositeTags('Image::ExifTool::ISO');
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131 |
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132 | #------------------------------------------------------------------------------
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133 | # Extract information from an ISO 9660 disk image
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134 | # Inputs: 0) ExifTool object reference, 1) dirInfo reference
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135 | # Returns: 1 on success, 0 if this wasn't a valid ISO 9660 image
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136 | sub ProcessISO($$)
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137 | {
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138 | my ($et, $dirInfo) = @_;
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139 | my $raf = $$dirInfo{RAF};
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140 | my ($buff, $tagTablePtr);
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141 |
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142 | # verify this is a valid ISO file
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143 | return 0 unless $raf->Seek(32768, 0);
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144 |
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145 | while ($raf->Read($buff, 2048) == 2048) {
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146 | last unless $buff =~ /^[\0-\x03\xff]CD001/;
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147 | unless ($tagTablePtr) {
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148 | $et->SetFileType(); # set the FileType tag
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149 | SetByteOrder('II'); # read little-endian values only
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150 | $tagTablePtr = GetTagTable('Image::ExifTool::ISO::Main');
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151 | }
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152 | my $type = unpack('C', $buff);
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153 | $et->VPrint(0, "Volume descriptor type $type ($volumeDescriptorType{$type})\n");
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154 | last if $type == 255; # stop at terminator
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155 | next unless $$tagTablePtr{$type};
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156 | my $subTablePtr = GetTagTable($$tagTablePtr{$type}{SubDirectory}{TagTable});
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157 | my %dirInfo = (
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158 | DataPt => \$buff,
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159 | DataPos => $raf->Tell() - 2048,
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160 | DirStart => 0,
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161 | DirLen => length($buff),
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162 | );
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163 | $et->ProcessDirectory(\%dirInfo, $subTablePtr);
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164 | }
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165 | return $tagTablePtr ? 1 : 0;
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166 | }
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167 |
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168 | 1; # end
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169 |
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170 | __END__
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171 |
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172 | =head1 NAME
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173 |
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174 | Image::ExifTool::ISO - Read information from ISO 9660 disk images
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175 |
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176 | =head1 SYNOPSIS
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177 |
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178 | This module is used by Image::ExifTool
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179 |
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180 | =head1 DESCRIPTION
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181 |
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182 | This module contains definitions required by Image::ExifTool to read
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183 | information from ISO 9660 disk images.
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184 |
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185 | =head1 AUTHOR
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186 |
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187 | Copyright 2003-2021, Phil Harvey (philharvey66 at gmail.com)
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188 |
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189 | This library is free software; you can redistribute it and/or modify it
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190 | under the same terms as Perl itself.
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191 |
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192 | =head1 REFERENCES
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193 |
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194 | =over 4
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195 |
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196 | =item L<http://wiki.osdev.org/ISO_9660>
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197 |
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198 | =back
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199 |
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200 | =head1 SEE ALSO
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201 |
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202 | L<Image::ExifTool::TagNames/ISO Tags>,
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203 | L<Image::ExifTool(3pm)|Image::ExifTool>
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204 |
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205 | =cut
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206 |
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