Log on tty (serial and vga)

user/test_pic/src/main.rs

@@ -1,34 +1,23 @@
 #![allow(unused)]
 
 use core::sync::atomic::AtomicUsize;
-use io::{Read as Readio, Write};
 use shared::{fs::File, syscall};
-use std::io::{Read, Stdin, stdin};
-
-static FOO: AtomicUsize = AtomicUsize::new(0);
+use std::io::{Read, Stdin, Write, stdin, stdout};
 
 fn main() {
-    let mut input = String::new();
-    input.push('a');
-    // let mut file = syscall::open("/dev/fb0");
-    // syscall::seek(&mut file, SeekFrom::End(-3));
-    // syscall::write(&mut file, &[255; 6400 * 50]);
-    // syscall::sleep(Duration::from_secs_f64(2.0));
     syscall::close(0);
     let mut tty = unsafe { File::from_raw_fd(syscall::open("/dev/tty0")) };
     syscall::close(1);
     let _ = syscall::open("/dev/tty0");
     println!("test from test_pic");
-    tty.write(input.as_bytes()).unwrap();
     syscall::spawn("/usr/bin/shell");
     // panic!("explicit panic");
     // std::process::abort();
-    unsafe {core::arch::asm!("unimp")};
+    // unsafe {core::arch::asm!("unimp")};
     loop {
-        let mut test = [0; 2];
-        // let len = stdin().read(&mut test);
-        let len = tty.read(&mut test).unwrap();
-        tty.write(str::from_utf8(&test[..len as usize]).unwrap().as_bytes())
-            .unwrap();
+        let mut test = [0; 4];
+        let len = stdin().read(&mut test).unwrap();
+        print!("{}", str::from_utf8(&test[..len as usize]).unwrap());
+        stdout().flush();
     }
 }