1use read_write_pipe::*;
2use std::fs::{File, OpenOptions};
3use std::io;
4use std::io::Write;
5
6fn prepare_input() -> io::Result<()> {
7 let mut f = OpenOptions::new()
8 .read(true)
9 .write(true)
10 .create(true)
11 .open("a.txt")?;
12 f.write_all(b"some content")
13}
14
15fn main() -> io::Result<()> {
16 prepare_input()?;
17 let input = File::open("a.txt")?;
18 let mut output = OpenOptions::new()
19 .read(true)
20 .write(true)
21 .create(true)
22 .open("b.txt")?;
23 let _ = output.write_reader(input)?;
24 Ok(())
25}