library/std/src/sys/fd/mod.rs

//! Platform-dependent file descriptor abstraction.

#![forbid(unsafe_op_in_unsafe_fn)]

cfg_select! {
    target_family = "unix" => {
        mod unix;
        pub use unix::*;
    }
    target_os = "hermit" => {
        mod hermit;
        pub use hermit::*;
    }
    target_os = "motor" => {
        mod motor;
        pub use motor::*;
    }
    all(target_vendor = "fortanix", target_env = "sgx") => {
        mod sgx;
        pub use sgx::*;
    }
    target_os = "wasi" => {
        mod wasi;
        pub use wasi::*;
    }
    _ => {}
}