/**
* Function that attempts to return the correct executable path.
* @return string WKHTMLTOPDF path.
*/
protected static function _getCMD()
{
if (self::$_cmd == '') {
// the end filename is in the form of "(%PATH%)wkhtmltopdf[-(win|osx|lin)-(amd64|i386|ppc)][.exe]"
self::$_cmd = $GLOBALS['WKPDF_BASE_PATH'];
self::$_cmd .= self::_getOS() == 'win' ? 'wkhtmltopdf.exe' : 'wkhtmltopdf-' . self::_getOS() . '-' . self::_getCPU();
}
switch (self::_getOS()) {
case 'win':
// checks file existence (permissions on windows isn't much of a problem)
// for windows, the command is "exists %filename%" ... try it out?
break;
case 'lin':
case 'osx':
// checks file existence and permissions using LS
$exists = self::_pipeExec('test -f "' . self::$_cmd . '"');
if ($exists['return'] > 0) {
throw new Exception('WKPDF executable couldn\'t be found ("' . htmlspecialchars(self::$_cmd) . '").');
}
$exists = explode(' ', str_replace(' ', ' ', str_replace(' ', ' ', $exists['stdout'])));
// perms, unused, group, user, ...
if (count($exists) > 1) {
// "test" command ran, keep testing settings, otherwise just ignore tests...
if (strstr($exists[0], 'rwxrwxrwx') === false) {
if ($exists[2] != get_current_user() || $exists[3] != get_current_user()) {
throw new Exception('WKPDF executable permissions are not 0777 or user/group does not match with current user/group.');
}
}
}
break;
}
return self::$_cmd;
}