如何通过TYPO3命令控制器写入文件

I wanna create files and write in log file through a TYPO3 command controller. I have used command controller, this is registered in ext_localconf as $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['extbase']['commandControllers'][] = VENDOR\ExtName\Command\GeneradorArchivosEncuestasCommandController::class;; the objetctive of this command controller is to create all templates in xlsx of a surveys of my extension domain, but in the mopment to create a file or write inside log files, I have the next error: failed to open stream: Permission denied.

Otherwise, the directories has 775 permissions and owner apache as group; and the users: _cli_lowlevel and _cli_scheduler, those user have the same file mount in BE referenced to typo3temp.

I am using TYPO3 7.6, PHP 5.6, Apache 2.2.15