Use stdio instead of opening the slave manually

src/main.rs

@@ -1,12 +1,8 @@
-use std::{fs::File, io::{BufRead, BufReader}};
-use std::io::Write;
+use std::io;
 
 fn main() {
-    let pts_read = File::open("/dev/pts0").unwrap();
-    let mut pts_write = File::open("/dev/pts0").unwrap();
-
-    for line in BufReader::new(pts_read).lines() {
+    for line in io::stdin().lines() {
         let line = line.unwrap();
-        writeln!(pts_write, "Got line on PTS: {:?}", line).unwrap();
+        println!("Got line on PTS: {:?}", line);
     }
 }