Add status variable

src/main.rs

@@ -4,6 +4,9 @@ use std::process::Command;
 use std::path::Path;
 
 fn main() {
+    // Variables
+    let mut STATUS = 0;
+
     loop {
     print!("$ ");
     io::stdout().flush();
@@ -16,8 +19,16 @@ fn main() {
     let args = parts;
 
     match command {
+        "true" | ":"  => {
+            STATUS = 0;
+        },
         "echo" => {
-            println!("{}", args.peekable().peek().map_or("/", |x| *x));
+            let args = args.peekable().peek().map_or("/", |x| *x);
+            if args.clone() == "$STATUS" {
+                println!("{}", STATUS);
+            } else {
+                println!("{}", args);
+            }
         },
         "cd" => {
             let new_dir = args.peekable().peek().map_or("/", |x| *x);
@@ -34,7 +45,7 @@ fn main() {
 
                 match child {
                     Ok(mut child) => { child.wait(); },
-                    Err(e) => eprintln!("{}", e),
+                    Err(e) => { STATUS=1; eprintln!("{}", e); },
                 };
         }
     }