Constant mio::sys::unix::selector::LOWEST_FD

const LOWEST_FD: c_int = 3;

Lowest file descriptor used in Selector::try_clone.

Notes

Usually fds 0, 1 and 2 are standard in, out and error. Some application blindly assume this to be true, which means using any one of those a select could result in some interesting and unexpected errors. Avoid that by using an fd that doesn’t have a pre-determined usage.