/usr/share/php/getid3/write.metaflac.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.metaflac.php //
// module for writing metaflac tags //
// dependencies: /helperapps/metaflac.exe //
// ///
/////////////////////////////////////////////////////////////////
class getid3_write_metaflac
{
public $filename;
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 WriteMetaFLAC() {
if (preg_match('#(1|ON)#i', ini_get('safe_mode'))) {
$this->errors[] = 'PHP running in Safe Mode (backtick operator not available) - cannot call metaflac, tags not written';
return false;
}
// Create file with new comments
$tempcommentsfilename = tempnam(GETID3_TEMP_DIR, 'getID3');
if (is_writable($tempcommentsfilename) && is_file($tempcommentsfilename) && ($fpcomments = fopen($tempcommentsfilename, 'wb'))) {
foreach ($this->tag_data as $key => $value) {
foreach ($value as $commentdata) {
fwrite($fpcomments, $this->CleanmetaflacName($key).'='.$commentdata."\n");
}
}
fclose($fpcomments);
} else {
$this->errors[] = 'failed to open temporary tags file, tags not written - fopen("'.$tempcommentsfilename.'", "wb")';
return false;
}
$oldignoreuserabort = ignore_user_abort(true);
if (GETID3_OS_ISWINDOWS) {
if (file_exists(GETID3_HELPERAPPSDIR.'metaflac.exe')) {
//$commandline = '"'.GETID3_HELPERAPPSDIR.'metaflac.exe" --no-utf8-convert --remove-all-tags --import-tags-from="'.$tempcommentsfilename.'" "'.str_replace('/', '\\', $this->filename).'"';
// metaflac works fine if you copy-paste the above commandline into a command prompt,
// but refuses to work with `backtick` if there are "doublequotes" present around BOTH
// the metaflac pathname and the target filename. For whatever reason...??
// The solution is simply ensure that the metaflac pathname has no spaces,
// and therefore does not need to be quoted
// On top of that, if error messages are not always captured properly under Windows
// To at least see if there was a problem, compare file modification timestamps before and after writing
clearstatcache();
$timestampbeforewriting = filemtime($this->filename);
$commandline = GETID3_HELPERAPPSDIR.'metaflac.exe --no-utf8-convert --remove-all-tags --import-tags-from='.escapeshellarg($tempcommentsfilename).' '.escapeshellarg($this->filename).' 2>&1';
$metaflacError = `$commandline`;
if (empty($metaflacError)) {
clearstatcache();
if ($timestampbeforewriting == filemtime($this->filename)) {
$metaflacError = 'File modification timestamp has not changed - it looks like the tags were not written';
}
}
} else {
$metaflacError = 'metaflac.exe not found in '.GETID3_HELPERAPPSDIR;
}
} else {
// It's simpler on *nix
$commandline = 'metaflac --no-utf8-convert --remove-all-tags --import-tags-from='.escapeshellarg($tempcommentsfilename).' '.escapeshellarg($this->filename).' 2>&1';
$metaflacError = `$commandline`;
}
// Remove temporary comments file
unlink($tempcommentsfilename);
ignore_user_abort($oldignoreuserabort);
if (!empty($metaflacError)) {
$this->errors[] = 'System call to metaflac failed with this message returned: '."\n\n".$metaflacError;
return false;
}
return true;
}
public function DeleteMetaFLAC() {
if (preg_match('#(1|ON)#i', ini_get('safe_mode'))) {
$this->errors[] = 'PHP running in Safe Mode (backtick operator not available) - cannot call metaflac, tags not deleted';
return false;
}
$oldignoreuserabort = ignore_user_abort(true);
if (GETID3_OS_ISWINDOWS) {
if (file_exists(GETID3_HELPERAPPSDIR.'metaflac.exe')) {
// To at least see if there was a problem, compare file modification timestamps before and after writing
clearstatcache();
$timestampbeforewriting = filemtime($this->filename);
$commandline = GETID3_HELPERAPPSDIR.'metaflac.exe --remove-all-tags "'.$this->filename.'" 2>&1';
$metaflacError = `$commandline`;
if (empty($metaflacError)) {
clearstatcache();
if ($timestampbeforewriting == filemtime($this->filename)) {
$metaflacError = 'File modification timestamp has not changed - it looks like the tags were not deleted';
}
}
} else {
$metaflacError = 'metaflac.exe not found in '.GETID3_HELPERAPPSDIR;
}
} else {
// It's simpler on *nix
$commandline = 'metaflac --remove-all-tags "'.$this->filename.'" 2>&1';
$metaflacError = `$commandline`;
}
ignore_user_abort($oldignoreuserabort);
if (!empty($metaflacError)) {
$this->errors[] = 'System call to metaflac failed with this message returned: '."\n\n".$metaflacError;
return false;
}
return true;
}
public function CleanmetaflacName($originalcommentname) {
// A case-insensitive field name that may consist of ASCII 0x20 through 0x7D, 0x3D ('=') excluded.
// ASCII 0x41 through 0x5A inclusive (A-Z) is to be considered equivalent to ASCII 0x61 through
// 0x7A inclusive (a-z).
// replace invalid chars with a space, return uppercase text
// Thanks Chris Bolt <chris-getid3Øbolt*cx> for improving this function
// note: *reg_replace() replaces nulls with empty string (not space)
return strtoupper(preg_replace('#[^ -<>-}]#', ' ', str_replace("\x00", ' ', $originalcommentname)));
}
}
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