Better error handling for invalid bind address, also return exit code failure on failure

src/main.rs

@@ -5,6 +5,7 @@ use std::{
     io::{BufReader, Error, ErrorKind, Result, prelude::*},
     net::{TcpListener, TcpStream},
     path::{Path, PathBuf},
+    process::ExitCode,
     sync::{
         Arc, Mutex,
         atomic::{AtomicUsize, Ordering},
@@ -32,10 +33,10 @@ use vn_settings::{
 
 mod dialog;
 
-fn main() {
+fn main() -> ExitCode {
     let Ok(path) = env::current_dir() else {
         eprintln!("Current directory does not exist!");
-        return;
+        return ExitCode::FAILURE;
     };
 
     let mut args = env::args();
@@ -44,6 +45,7 @@ fn main() {
     let password = args.next();
     let partial_password = args.next();
     start_server(path, &address, password, partial_password);
+    ExitCode::FAILURE
 }
 
 fn start_server(
@@ -52,7 +54,10 @@ fn start_server(
     password: Option<String>,
     partial_password: Option<String>,
 ) {
-    let listener = TcpListener::bind(address).expect("Invalid bind address!");
+    let Ok(listener) = TcpListener::bind(address) else {
+        eprintln!("Invalid bind address {address:?}!");
+        return;
+    };
     eprintln!("Strated server!");
 
     let context: Arc<Mutex<Context>> = Arc::default();