Clean way to patch the std

user/test_pic/src/main.rs

@@ -2,7 +2,7 @@
 #![allow(unused)]
 
 use io::{Read, Write};
-use std::{io::stdin, syscall};
+use std::{io::{Stdin, stdin}, syscall};
 
 fn main() {
     // let mut input = String::new();
@@ -15,8 +15,8 @@ fn main() {
     syscall::spawn("/usr/bin/shell");
     loop {
         let mut test = [0; 2];
-        let len = stdin().read(&mut test).unwrap();
+        let len = tty.read(&mut test).unwrap();
         tty.write(str::from_utf8(&test[..len as usize]).unwrap().as_bytes())
-            .unwrap();
+         .unwrap();
     }
 }