Added Cargo.toml, did some other stuff

hw6/task2/Cargo.toml

+[package]
+name = "task2"
+version = "0.1.0"
+authors = ["Lorenz Bung <lorenz.bung@googlemail.com>"]
+
+[dependencies]

hw6/task2/src/command.rs

+enum Command {
+    Empty,
+    Exit,
+    Cd(Option<OsString>),
+}
+
+impl Command {
+}
+
+impl FromStr for Command {
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+    }
+}

hw6/task2/src/shell.rs

+use std::io;
+use std::io::prelude::*;
+
 struct Shell<R, W> {
     pub reader: R,
     pub writer: W,
 }
 
 impl BufRead for Shell<R, W> {
-    fn fill_buf(&mut self) -> Result<&[u8]> {}
-    fn consume(&mut self, amt: usize) {}
+    fn fill_buf(&mut self) -> Result<&[u8]> {
+        let buf = match stdin.fill_buf() {
+            Ok(res) => res,
+            Err(e) => return Err(e),
+        }
+        buf.unwrap()
+    }
+    fn consume(&mut self, amt: usize) {
+    }
 }
 
 impl Write for Shell<R, W> {
-    fn write(&mut self, buf: &[u8]) -> Result<usize> {}
-    fn flush(&mut self) -> Result<()> {}
+    fn write(&mut self, buf: &[u8]) -> Result<usize> {
+    }
+    fn flush(&mut self) -> Result<()> {
+    }
 }