# File lib/fusefs/pathmapper.rb, line 152
        def self.open_mode(raw_mode)
            case raw_mode
            when "r"
                "r"
            when "ra"
                "r" #not really sensible..
            when "rw"
                "r+"
            when "rwa"
                "a+"
            when "w"
                "w"
            when "wa"
                "a"
            end
        end