/usr/share/php/getid3/write.id3v1.php is in php-getid3 1.9.11+dfsg-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org> //
// available at http://getid3.sourceforge.net //
// or http://www.getid3.org //
// also https://github.com/JamesHeinrich/getID3 //
/////////////////////////////////////////////////////////////////
// See readme.txt for more details //
/////////////////////////////////////////////////////////////////
// //
// write.id3v1.php //
// module for writing ID3v1 tags //
// dependencies: module.tag.id3v1.php //
// ///
/////////////////////////////////////////////////////////////////
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.tag.id3v1.php', __FILE__, true);
class getid3_write_id3v1
{
public $filename;
public $filesize;
public $tag_data;
public $warnings = array(); // any non-critical errors will be stored here
public $errors = array(); // any critical errors will be stored here
public function __construct() {
return true;
}
public function WriteID3v1() {
// File MUST be writeable - CHMOD(646) at least
if (!empty($this->filename) && is_readable($this->filename) && is_writable($this->filename) && is_file($this->filename)) {
$this->setRealFileSize();
if (($this->filesize <= 0) || !getid3_lib::intValueSupported($this->filesize)) {
$this->errors[] = 'Unable to WriteID3v1('.$this->filename.') because filesize ('.$this->filesize.') is larger than '.round(PHP_INT_MAX / 1073741824).'GB';
return false;
}
if ($fp_source = fopen($this->filename, 'r+b')) {
fseek($fp_source, -128, SEEK_END);
if (fread($fp_source, 3) == 'TAG') {
fseek($fp_source, -128, SEEK_END); // overwrite existing ID3v1 tag
} else {
fseek($fp_source, 0, SEEK_END); // append new ID3v1 tag
}
$this->tag_data['track'] = (isset($this->tag_data['track']) ? $this->tag_data['track'] : (isset($this->tag_data['track_number']) ? $this->tag_data['track_number'] : (isset($this->tag_data['tracknumber']) ? $this->tag_data['tracknumber'] : '')));
$new_id3v1_tag_data = getid3_id3v1::GenerateID3v1Tag(
(isset($this->tag_data['title'] ) ? $this->tag_data['title'] : ''),
(isset($this->tag_data['artist'] ) ? $this->tag_data['artist'] : ''),
(isset($this->tag_data['album'] ) ? $this->tag_data['album'] : ''),
(isset($this->tag_data['year'] ) ? $this->tag_data['year'] : ''),
(isset($this->tag_data['genreid']) ? $this->tag_data['genreid'] : ''),
(isset($this->tag_data['comment']) ? $this->tag_data['comment'] : ''),
(isset($this->tag_data['track'] ) ? $this->tag_data['track'] : ''));
fwrite($fp_source, $new_id3v1_tag_data, 128);
fclose($fp_source);
return true;
} else {
$this->errors[] = 'Could not fopen('.$this->filename.', "r+b")';
return false;
}
}
$this->errors[] = 'File is not writeable: '.$this->filename;
return false;
}
public function FixID3v1Padding() {
// ID3v1 data is supposed to be padded with NULL characters, but some taggers incorrectly use spaces
// This function rewrites the ID3v1 tag with correct padding
// Initialize getID3 engine
$getID3 = new getID3;
$getID3->option_tag_id3v2 = false;
$getID3->option_tag_apetag = false;
$getID3->option_tags_html = false;
$getID3->option_extra_info = false;
$getID3->option_tag_id3v1 = true;
$ThisFileInfo = $getID3->analyze($this->filename);
if (isset($ThisFileInfo['tags']['id3v1'])) {
foreach ($ThisFileInfo['tags']['id3v1'] as $key => $value) {
$id3v1data[$key] = implode(',', $value);
}
$this->tag_data = $id3v1data;
return $this->WriteID3v1();
}
return false;
}
public function RemoveID3v1() {
// File MUST be writeable - CHMOD(646) at least
if (!empty($this->filename) && is_readable($this->filename) && is_writable($this->filename) && is_file($this->filename)) {
$this->setRealFileSize();
if (($this->filesize <= 0) || !getid3_lib::intValueSupported($this->filesize)) {
$this->errors[] = 'Unable to RemoveID3v1('.$this->filename.') because filesize ('.$this->filesize.') is larger than '.round(PHP_INT_MAX / 1073741824).'GB';
return false;
}
if ($fp_source = fopen($this->filename, 'r+b')) {
fseek($fp_source, -128, SEEK_END);
if (fread($fp_source, 3) == 'TAG') {
ftruncate($fp_source, $this->filesize - 128);
} else {
// no ID3v1 tag to begin with - do nothing
}
fclose($fp_source);
return true;
} else {
$this->errors[] = 'Could not fopen('.$this->filename.', "r+b")';
}
} else {
$this->errors[] = $this->filename.' is not writeable';
}
return false;
}
public function setRealFileSize() {
if (PHP_INT_MAX > 2147483647) {
$this->filesize = filesize($this->filename);
return true;
}
// 32-bit PHP will not return correct values for filesize() if file is >=2GB
// but getID3->analyze() has workarounds to get actual filesize
$getID3 = new getID3;
$getID3->option_tag_id3v1 = false;
$getID3->option_tag_id3v2 = false;
$getID3->option_tag_apetag = false;
$getID3->option_tags_html = false;
$getID3->option_extra_info = false;
$ThisFileInfo = $getID3->analyze($this->filename);
$this->filesize = $ThisFileInfo['filesize'];
return true;
}
}
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