init: read_dir test

init/src/main.rs

@@ -1,6 +1,31 @@
 #![feature(rustc_private)]
 
 use std::os::yggdrasil::{mount, open, OpenOptions, FileMode, MountOptions};
+use std::borrow::Cow;
+use std::path::{Path, PathBuf};
+
+fn ls_tree<P: AsRef<Path>>(path: P, depth: usize) -> std::io::Result<()> {
+    for entry in std::fs::read_dir(path)? {
+        let entry = entry?;
+        let os_filename = entry.file_name();
+        let filename = os_filename.to_str().unwrap();
+        let path = entry.path();
+
+        if filename.starts_with('.') {
+            continue;
+        }
+
+        for _ in 0..depth {
+            print!("  ");
+        }
+        println!("{:?}", filename);
+
+        if entry.file_type().unwrap().is_dir() {
+            ls_tree(path, depth + 1);
+        }
+    }
+    Ok(())
+}
 
 fn main() {
     unsafe {
@@ -17,17 +42,5 @@ fn main() {
         open("/dev/ttyS0", OpenOptions::WRITE, FileMode::empty()).unwrap();
     }
 
-    let stdin = std::io::stdin();
-    let mut buffer = String::new();
-
-    while let Ok(len) = stdin.read_line(&mut buffer) {
-        if len == 0 {
-            println!("End of file reached");
-            break;
-        }
-        println!("{:?}", buffer.trim());
-        buffer.clear();
-    }
-
-    loop {}
+    ls_tree("/", 0).ok();
 }