title: How to determine max fd for select?
body: <p>Just as straightforward as the title, I want to get the highest fd number to pass into <code>select</code> as its first argument yet using <code>FD_SETSISE</code> seems to be so inefficient and unnecessary. My assumption is that after my process begins, the latest socket created will always have the highest fd number so I can simply add 1 to it and pass it to <code>select</code>, is that true?</p>