Merge pull request 'feature/exit_codes' (#2) from feature/exit_codes into main

Reviewed-on: https://gitea.ahur.ac/ahurac/rash/pulls/2

README.md

@@ -5,7 +5,7 @@
 ## To-do
 
 - [x] Read commands from `stdin`
-- [ ] Exit with last child termination code
+- [x] Exit with last child termination code
 - [ ] Handle background jobs
 - [ ] Handle pipes
 - [ ] Handle double quotes

src/main.rs

@@ -1,4 +1,8 @@
-use std::process::exit;
+use std::io::Result;
+use std::process::{
+    ExitStatus,
+    exit,
+};
 
 mod input;
 mod output;
@@ -9,6 +13,8 @@ fn main() {
     let mut buffer = input::Buffer::new();
     let mut bytes_read: usize = 1;
     let mut argv: Option<Vec<String>>;
+    let mut exit_status: Result<ExitStatus>;
+    let mut exit_code: i32 = 0;
 
     while bytes_read != 0 {
         output::print_ps1();
@@ -16,11 +22,22 @@ fn main() {
 
         argv = buffer.parse();
         if argv.is_some() {
-            let _ = job::execute(argv.unwrap());
+            exit_status = job::execute(argv.unwrap());
+
+            if exit_status.is_ok() {
+                let exit_status = exit_status.unwrap();
+
+                if exit_status.code().is_some() {
+                    exit_code = exit_status.code().unwrap();
+                } else {
+                    exit_code = 1;
+                }
+            } else {
+                exit_code = 1;
+            }
         }
     }
 
     println!();
-
-    exit(0);
+    exit(exit_code);
 }