/**
* Show log, passthru multitail
*
* @param array $logList List of log files
* @param InputInterface $input Input instance
* @param OutputInterface $output Output instance
* @param string $grep Grep value
* @param array $optionList Additional option list for multitail
*
* @return int|null|void
* @throws \Exception
*/
protected function showLog($logList, $input, $output, $grep = null, $optionList = null)
{
$this->elevateProcess($input, $output);
// check if logfiles are accessable
foreach ($logList as $log) {
if (!is_readable($log)) {
$output->writeln('<p-error>Can\'t read ' . $log . '</p-error>');
return 1;
}
}
$output->writeln('<p>Reading logfile with multitail</p>');
$command = new CommandBuilder('multitail', '--follow-all');
// Add grep
if ($grep !== null) {
$command->addArgumentTemplate('-E %s', $grep);
}
// Add log
$command->addArgumentList($logList);
$command->executeInteractive();
return 0;
}