- return $this->run_command(sprintf('chgrp %o %s', $mode, escapeshellarg($file)), true);
- return $this->run_command(sprintf('chgrp -R %o %s', $mode, escapeshellarg($file)), true);
+ return $this->run_command(sprintf('chgrp %s %s', escapeshellarg($group), escapeshellarg($file)), true);
+ return $this->run_command(sprintf('chgrp -R %s %s', escapeshellarg($group), escapeshellarg($file)), true);