the input filename relativized by its input directory.
the input file to read from.
the output file to write to.
directory enclosing the input file.
directory enclosing the output file.
directory enclosing the input file.
the input file to read from.
directory enclosing the output file.
the output file to write to.
the input filename relativized by its input directory.
the input filename relativized by its input directory.
the input file to read from.
the output file to write to.
directory enclosing the input file.
directory enclosing the output file.