Add the rust std as a custom sysroot

user/test_pic/Cargo.toml

@@ -4,4 +4,7 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-os-std = { path = "../../crates/os-std" }
+# std = { path = "../../crates/std" }
+shared = { path = "../../crates/shared", features = ["user"] }
+io = { path = "../../crates/io" }
+bffs = { path = "../../crates/bffs" }

user/test_pic/src/main.rs

@@ -1,30 +1,24 @@
-#![no_std]
-#![no_main]
+#![allow(unused)]
 
-// use core::time::Duration;
-
-use os_std::syscall;
-os_std::custom_std_setup! {}
+use io::{Read, Write};
+use std::io::{Stdin, stdin};
+use shared::syscall;
 
 fn main() {
-    // let mut input = String::new();
+    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));
-    let mut stdin = syscall::open("/dev/tty0");
-    let mut file = syscall::open("/dev/tty0");
+    syscall::close(0);
+    let mut tty = syscall::open("/dev/tty0");
+    tty.write(input.as_bytes()).unwrap();
+    syscall::spawn("/usr/bin/shell");
     loop {
         let mut test = [0; 2];
-        syscall::read(&mut stdin, &mut test);
-        let len = *test.iter().find(|x| **x == 0).unwrap_or(&1) + 1;
-        syscall::write(
-            &mut file,
-            str::from_utf8(&test[..len as usize]).unwrap().as_bytes(),
-        );
+        let len = tty.read(&mut test).unwrap();
+        tty.write(str::from_utf8(&test[..len as usize]).unwrap().as_bytes())
+            .unwrap();
     }
-    // println!(
-    //     "Hello from PIC program loaded dynamically with custom std and a better justfile, and syscalls ! {:?}",
-    //     str::from_utf8(&test)
-    // );
 }