[o11c]

That fails to note that `FD_SETSIZE` only applies if you're statically allocating your sets and rely on the libc defaults. If you do dynamic allocation (or, on some libcs, if you define the macro before including headers), you can select() a million FDs just fine.

It's still a bad idea for performance reasons (though `poll` can actually be worse on dense sets), but it's not actually the open-file limit that's the problem.

[kevincox]

I don't think it fails to address that in a way that matters. The fact is that the default is still 1024. If you have bumped the side at build time it dynamically allocate them then you are more than welcome to bump the soft limit to the hard limit at the start of your program. (And set it back to the default before you exec anything else)