Add some logging so that with the env variable RUST_LOG=debug or similar, there is timestamped output to stderr

server/Cargo.toml

@@ -7,6 +7,8 @@ edition.workspace = true
 clap = { workspace = true }
 common = { workspace = true }
 argon2 = "0.5.3"
+env_logger = "0.11.8"
+log = "0.4.29"
 
 [[bin]]
 name = "saslauthd"

server/src/handler.rs

@@ -1,5 +1,6 @@
 use crate::repository::PasswordDirectory;
 use common::request::Request;
+use log::{error, info};
 use std::io::{Error, Read, Write};
 
 pub const RESPONSE_NO: [u8; 4] = [0x0, 0x2, b'N', b'O'];
@@ -18,19 +19,21 @@ impl<S: Read + Write> Handler<S> {
     fn communicate(&mut self) -> Result<(), Error> {
         let request = Request::from_stream(&mut self.stream)?;
 
-        println!("userid: {}", request.userid);
         if self.repository.check_auth(&request) {
-            self.stream.write_all(&RESPONSE_OK)?
+            self.stream.write_all(&RESPONSE_OK)?;
+            info!("userid: {}, service: {}, realm: {} - OK", request.userid, request.service, request.realm);
         } else {
-            self.stream.write_all(&RESPONSE_NO)?
+            self.stream.write_all(&RESPONSE_NO)?;
+            info!("userid: {}, service: {}, realm: {} - FAIL", request.userid, request.service, request.realm);
         }
 
+
         Ok(())
     }
 
     pub fn handle_client(&mut self) {
         if let Err(error) = self.communicate() {
-            eprint!("{error}");
+            error!("{error}");
         }
     }
 }

server/src/main.rs

@@ -8,6 +8,8 @@ use crate::repository::PasswordDirectory;
 use crate::server::Server;
 
 fn main() -> std::io::Result<()> {
+    env_logger::init();
+    
     let repository = PasswordDirectory::new(&OPTIONS.password_dir);
     let mut server = Server::new(&OPTIONS.socket_name, repository)?;
     server.run()

server/src/repository.rs

@@ -8,6 +8,7 @@ use argon2::{
 use std::fs::File;
 use std::io::{BufRead, BufReader};
 use std::path::PathBuf;
+use log::info;
 
 #[derive(Clone)]
 pub struct PasswordDirectory {
@@ -49,6 +50,7 @@ impl PasswordDirectory {
     ///
     fn check_hashed_password(&self, lines: &Vec<String>, password: &str) -> bool {
         let (key, split_password) = password.strip_prefix('[').unwrap().split_once(']').unwrap();
+        info!("    looking for password-key: [{}]", key);
 
         let mut result = false;
 
@@ -72,6 +74,8 @@ impl PasswordDirectory {
     }
 
     fn check_plain_password(&self, lines: &Vec<String>, password: &str) -> bool {
+        info!("    looking for plain password");
+
         let mut result = false;
 
         for line in lines {

server/src/server.rs

@@ -6,6 +6,7 @@ use std::os::unix::fs::PermissionsExt;
 use std::os::unix::net::UnixListener;
 use std::path::PathBuf;
 use std::thread;
+use log::info;
 
 pub struct Server {
     listener: UnixListener,
@@ -56,6 +57,6 @@ impl Server {
 impl Drop for Server {
     fn drop(&mut self) {
         let _result = std::fs::remove_file(&self.socket_name);
-        println!("Shutting down");
+        info!("Shutting down");
     }
 }