Doesn't look like the right line, all that is saying in pseudo is:
CODE
if not writable or is not readable
That merely enters the elseif block statement if either of those conditions are true.
You need to see where this is established:
CODE
$mfhclass->info->root_path
You'll need to track back to the 'mfhclass'. Then reverse engineer it, working your way back through the methods / properties to find the value, chances are it's set in some form of configuration file.