Playing around with shell and its file descriptors

main.go

package main

import "os"

func main() {
	my_file := os.NewFile(5, "doesn't matter!")
	my_file.Write([]byte("hallo =)\n"))
}

main.rs

use std::fs::File;
use std::io::Write;
use std::os::unix::io::FromRawFd;

fn main() {
    let mut my_file: File;
    unsafe {
        my_file = File::from_raw_fd(5);
    }
    my_file.write("hallo, wie gehts?\n".as_bytes()).unwrap();
}