Re: [PATCH v3 3/3] mingw: replace isatty() hack

+	/*
+	 * Use stock dup2() to re-bind fd to the new handle.  Note that
+	 * this will implicitly close(1) and close both fd=1 and the
+	 * originally associated handle.  It will open a new fd=1 and
+	 * call DuplicateHandle() on the handle associated with new_fd.
+	 * It is because of this implicit close() that we created the
+	 * copy of the original.
+	 *
+	 * Note that we need to update the cached console handle to the
+	 * duplicated one because the dup2() call will implicitly close
+	 * the original one.
+	 *
+	 * Note that dup2() when given target := {0,1,2} will also
+	 * call SetStdHandle(), so we don't need to worry about that.
+	 */
+	if (console == handle)
+		console = duplicate;
+	dup2(new_fd, fd);