Implement exec

Implement brk

init/src/main.rs

@@ -1,7 +1,15 @@
+use std::fs::File;
+use std::io::{BufRead, BufReader};
 use std::thread;
 
 pub fn main() {
-    println!("Hello, World!");
+    let mut file = File::open("initfs:etc/init.rc").expect("failed to open init.rc");
+    let mut reader = BufReader::new(file);
+
+    for line in reader.lines() {
+        println!("{}", line.expect("failed to read init.rc"));
+    }
+
     loop {
         thread::yield_now();
     }