Config Fallback + Working Directory Setup

Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>

src/config/defaults.rs

@@ -100,7 +100,7 @@ pub(crate) fn default_fake_cert_len() -> usize {
 }
 
 pub(crate) fn default_tls_front_dir() -> String {
-    "tlsfront".to_string()
+    "/etc/telemt/tlsfront".to_string()
 }
 
 pub(crate) fn default_replay_check_len() -> usize {
@@ -558,7 +558,7 @@ pub(crate) fn default_beobachten_flush_secs() -> u64 {
 }
 
 pub(crate) fn default_beobachten_file() -> String {
-    "cache/beobachten.txt".to_string()
+    "/etc/telemt/beobachten.txt".to_string()
 }
 
 pub(crate) fn default_tls_new_session_tickets() -> u8 {

src/maestro/helpers.rs

@@ -18,19 +18,38 @@ use crate::transport::middle_proxy::{
 pub(crate) fn resolve_runtime_config_path(
     config_path_cli: &str,
     startup_cwd: &std::path::Path,
+    config_path_explicit: bool,
 ) -> PathBuf {
+    if config_path_explicit {
         let raw = PathBuf::from(config_path_cli);
         let absolute = if raw.is_absolute() {
             raw
         } else {
             startup_cwd.join(raw)
         };
-    absolute.canonicalize().unwrap_or(absolute)
+        return absolute.canonicalize().unwrap_or(absolute);
+    }
+
+    let etc_telemt = std::path::Path::new("/etc/telemt");
+    let candidates = [
+        startup_cwd.join("config.toml"),
+        startup_cwd.join("telemt.toml"),
+        etc_telemt.join("telemt.toml"),
+        etc_telemt.join("config.toml"),
+    ];
+    for candidate in candidates {
+        if candidate.is_file() {
+            return candidate.canonicalize().unwrap_or(candidate);
+        }
+    }
+
+    startup_cwd.join("config.toml")
 }
 
 /// Parsed CLI arguments.
 pub(crate) struct CliArgs {
     pub config_path: String,
+    pub config_path_explicit: bool,
     pub data_path: Option<PathBuf>,
     pub silent: bool,
     pub log_level: Option<String>,
@@ -39,6 +58,7 @@ pub(crate) struct CliArgs {
 
 pub(crate) fn parse_cli() -> CliArgs {
     let mut config_path = "config.toml".to_string();
+    let mut config_path_explicit = false;
     let mut data_path: Option<PathBuf> = None;
     let mut silent = false;
     let mut log_level: Option<String> = None;
@@ -74,6 +94,20 @@ pub(crate) fn parse_cli() -> CliArgs {
                     s.trim_start_matches("--data-path=").to_string(),
                 ));
             }
+            "--working-dir" => {
+                i += 1;
+                if i < args.len() {
+                    data_path = Some(PathBuf::from(args[i].clone()));
+                } else {
+                    eprintln!("Missing value for --working-dir");
+                    std::process::exit(0);
+                }
+            }
+            s if s.starts_with("--working-dir=") => {
+                data_path = Some(PathBuf::from(
+                    s.trim_start_matches("--working-dir=").to_string(),
+                ));
+            }
             "--silent" | "-s" => {
                 silent = true;
             }
@@ -111,13 +145,11 @@ pub(crate) fn parse_cli() -> CliArgs {
                     i += 1;
                 }
             }
-            s if s.starts_with("--working-dir") => {
-                if !s.contains('=') {
-                    i += 1;
-                }
-            }
             s if !s.starts_with('-') => {
+                if !matches!(s, "run" | "start" | "stop" | "reload" | "status") {
                     config_path = s.to_string();
+                    config_path_explicit = true;
+                }
             }
             other => {
                 eprintln!("Unknown option: {}", other);
@@ -128,6 +160,7 @@ pub(crate) fn parse_cli() -> CliArgs {
 
     CliArgs {
         config_path,
+        config_path_explicit,
         data_path,
         silent,
         log_level,
@@ -152,6 +185,7 @@ fn print_help() {
     eprintln!(
         "  --data-path <DIR>       Set data directory (absolute path; overrides config value)"
     );
+    eprintln!("  --working-dir <DIR>     Alias for --data-path");
     eprintln!("  --silent, -s            Suppress info logs");
     eprintln!("  --log-level <LEVEL>     debug|verbose|normal|silent");
     eprintln!("  --help, -h              Show this help");
@@ -210,7 +244,7 @@ mod tests {
         let target = startup_cwd.join("config.toml");
         std::fs::write(&target, " ").unwrap();
 
-        let resolved = resolve_runtime_config_path("config.toml", &startup_cwd);
+        let resolved = resolve_runtime_config_path("config.toml", &startup_cwd, true);
         assert_eq!(resolved, target.canonicalize().unwrap());
 
         let _ = std::fs::remove_file(&target);
@@ -226,11 +260,44 @@ mod tests {
         let startup_cwd = std::env::temp_dir().join(format!("telemt_cfg_path_missing_{nonce}"));
         std::fs::create_dir_all(&startup_cwd).unwrap();
 
-        let resolved = resolve_runtime_config_path("missing.toml", &startup_cwd);
+        let resolved = resolve_runtime_config_path("missing.toml", &startup_cwd, true);
         assert_eq!(resolved, startup_cwd.join("missing.toml"));
 
         let _ = std::fs::remove_dir(&startup_cwd);
     }
+
+    #[test]
+    fn resolve_runtime_config_path_uses_startup_candidates_when_not_explicit() {
+        let nonce = std::time::SystemTime::now()
+            .duration_since(std::time::UNIX_EPOCH)
+            .unwrap()
+            .as_nanos();
+        let startup_cwd = std::env::temp_dir().join(format!("telemt_cfg_startup_candidates_{nonce}"));
+        std::fs::create_dir_all(&startup_cwd).unwrap();
+        let telemt = startup_cwd.join("telemt.toml");
+        std::fs::write(&telemt, " ").unwrap();
+
+        let resolved = resolve_runtime_config_path("config.toml", &startup_cwd, false);
+        assert_eq!(resolved, telemt.canonicalize().unwrap());
+
+        let _ = std::fs::remove_file(&telemt);
+        let _ = std::fs::remove_dir(&startup_cwd);
+    }
+
+    #[test]
+    fn resolve_runtime_config_path_defaults_to_startup_config_when_none_found() {
+        let nonce = std::time::SystemTime::now()
+            .duration_since(std::time::UNIX_EPOCH)
+            .unwrap()
+            .as_nanos();
+        let startup_cwd = std::env::temp_dir().join(format!("telemt_cfg_startup_default_{nonce}"));
+        std::fs::create_dir_all(&startup_cwd).unwrap();
+
+        let resolved = resolve_runtime_config_path("config.toml", &startup_cwd, false);
+        assert_eq!(resolved, startup_cwd.join("config.toml"));
+
+        let _ = std::fs::remove_dir(&startup_cwd);
+    }
 }
 
 pub(crate) fn print_proxy_links(host: &str, port: u16, config: &ProxyConfig) {

src/maestro/mod.rs

@@ -112,6 +112,7 @@ async fn run_inner(
         .await;
     let cli_args = parse_cli();
     let config_path_cli = cli_args.config_path;
+    let config_path_explicit = cli_args.config_path_explicit;
     let data_path = cli_args.data_path;
     let cli_silent = cli_args.silent;
     let cli_log_level = cli_args.log_level;
@@ -123,7 +124,8 @@ async fn run_inner(
             std::process::exit(1);
         }
     };
-    let config_path = resolve_runtime_config_path(&config_path_cli, &startup_cwd);
+    let mut config_path =
+        resolve_runtime_config_path(&config_path_cli, &startup_cwd, config_path_explicit);
 
     let mut config = match ProxyConfig::load(&config_path) {
         Ok(c) => c,
@@ -133,11 +135,100 @@ async fn run_inner(
                 std::process::exit(1);
             } else {
                 let default = ProxyConfig::default();
-                std::fs::write(&config_path, toml::to_string_pretty(&default).unwrap()).unwrap();
+
+                let serialized = match toml::to_string_pretty(&default)
+                    .or_else(|_| toml::to_string(&default))
+                {
+                    Ok(value) => Some(value),
+                    Err(serialize_error) => {
+                        eprintln!(
+                            "[telemt] Warning: failed to serialize default config: {}",
+                            serialize_error
+                        );
+                        None
+                    }
+                };
+
+                if config_path_explicit {
+                    if let Some(serialized) = serialized.as_ref() {
+                        if let Err(write_error) = std::fs::write(&config_path, serialized) {
+                            eprintln!(
+                                "[telemt] Error: failed to create explicit config at {}: {}",
+                                config_path.display(),
+                                write_error
+                            );
+                            std::process::exit(1);
+                        }
                         eprintln!(
                             "[telemt] Created default config at {}",
                             config_path.display()
                         );
+                    } else {
+                        eprintln!(
+                            "[telemt] Warning: running with in-memory default config without writing to disk"
+                        );
+                    }
+                } else {
+                    let system_dir = std::path::Path::new("/etc/telemt");
+                    let system_config_path = system_dir.join("telemt.toml");
+                    let startup_config_path = startup_cwd.join("config.toml");
+                    let mut persisted = false;
+
+                    if let Some(serialized) = serialized.as_ref() {
+                        match std::fs::create_dir_all(system_dir) {
+                            Ok(()) => match std::fs::write(&system_config_path, serialized) {
+                                Ok(()) => {
+                                    config_path = system_config_path;
+                                    eprintln!(
+                                        "[telemt] Created default config at {}",
+                                        config_path.display()
+                                    );
+                                    persisted = true;
+                                }
+                                Err(write_error) => {
+                                    eprintln!(
+                                        "[telemt] Warning: failed to write default config at {}: {}",
+                                        system_config_path.display(),
+                                        write_error
+                                    );
+                                }
+                            },
+                            Err(create_error) => {
+                                eprintln!(
+                                    "[telemt] Warning: failed to create {}: {}",
+                                    system_dir.display(),
+                                    create_error
+                                );
+                            }
+                        }
+
+                        if !persisted {
+                            match std::fs::write(&startup_config_path, serialized) {
+                                Ok(()) => {
+                                    config_path = startup_config_path;
+                                    eprintln!(
+                                        "[telemt] Created default config at {}",
+                                        config_path.display()
+                                    );
+                                    persisted = true;
+                                }
+                                Err(write_error) => {
+                                    eprintln!(
+                                        "[telemt] Warning: failed to write default config at {}: {}",
+                                        startup_config_path.display(),
+                                        write_error
+                                    );
+                                }
+                            }
+                        }
+                    }
+
+                    if !persisted {
+                        eprintln!(
+                            "[telemt] Warning: running with in-memory default config without writing to disk"
+                        );
+                    }
+                }
                 default
             }
         }