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> No new code should be using select(). Using it assumes the execution environment keeps all file descriptor values within FD_SETSIZE.

What should we use instead? poll()?

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that's indeed one of the choices from the article itself.

I remember reading somewhere that poll was just a wrapper for select. I’m guessing that’s either outdated or false now.

It's correct but outdated: according to https://man7.org/linux/man-pages/man2/poll.2.html#VERSIONS "The poll() system call was introduced in Linux 2.1.23. On older kernels that lack this system call, the glibc poll() wrapper function provides emulation using select(2)."

So as long as you use a Linux kernel made this century, you will be fine.

epoll.

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