daemon: centralized architecture with Unix socket IPC

- single daemon process manages all services in memory
- CLI communicates via Unix socket, does not read config
- config hot-reload: daemon polls config.toml, reacts immediately
- rename-safe: removing a service from config kills it, adding starts if enabled
- logs remain file-based for direct reading by rss logs
- removed per-service PID files, supervisor module simplified

README.md

@@ -1,16 +1,25 @@
 # rss — RuSt Supervisor
 
-Lightweight, per-user process supervisor. No daemon, no root, no virtualization.
+Lightweight, per-user process supervisor. No root, no virtualization.
 
-## Philosophy
+## Architecture
 
-- **KISS** — one binary, one job. Each service gets its own supervisor process.
-- **UNIX way** — PID files for state, no IPC, no sockets.
-- **User-space** — everything under `~/.config/rss/` and `~/.local/share/rss/`.
-- **No root** — runs entirely as your user.
+- **Single daemon** (`rss daemon`) manages all services in-process
+- **CLI** (`rss start`, `rss stop`, etc.) talks to the daemon via Unix socket
+- **No PID files** for services — state lives in daemon memory
+- **Config hot-reload** — rename/add/remove services live, daemon detects changes
+- **Logs** written to `~/.local/share/rss/logs/<name>.log` — readable by CLI directly
 
 ## Usage
 
+First start the daemon (via systemd or terminal):
+
+```
+rss daemon
+```
+
+Then manage services:
+
 ```
 rss start <name>       Start a service
 rss stop <name>        Stop a service
@@ -20,7 +29,6 @@ rss logs <name> [-n N] [-f]   View logs (last N, follow)
 rss enable <name> [--now]     Enable auto-start
 rss disable <name>     Disable auto-start
 rss list               List all services
-rss daemon             Start all enabled services
 ```
 
 ## Configuration
@@ -34,7 +42,7 @@ command       = "your command here"
 stop_command  = "optional stop command"
 timeout_start = 15
 timeout_stop  = 10
-restart       = "on-failure"   # no, always, on-failure
+restart       = "on-failure"   # no, always, unless-stopped, on-failure
 restart_delay = 3
 restart_max   = 5              # 0 = unlimited
 oneshot       = false
@@ -44,7 +52,7 @@ env = { KEY = "value" }
 
 Placeholders in `command` / `stop_command`: `{name}`, `{workdir}`, `{pid}`, `{log_file}`, plus any env var.
 
-See `config.example.toml` for a full example.
+Edit `config.toml` any time — the daemon picks up changes live.
 
 ## systemd (user mode)
 

src/daemon.rs

@@ -0,0 +1,441 @@
+use std::collections::HashMap;
+use std::io::{BufRead, BufReader, Write};
+use std::os::unix::net::{UnixListener, UnixStream};
+use std::process::{Child, Command, Stdio};
+use std::time::{Duration, SystemTime};
+use std::sync::atomic::{AtomicBool, Ordering};
+
+use crate::config::{Config, RestartPolicy, ServiceConfig};
+use crate::state::State;
+
+static STOP: AtomicBool = AtomicBool::new(false);
+
+extern "C" fn handle_sigterm(_: i32) {
+    STOP.store(true, Ordering::Relaxed);
+}
+
+struct Proc {
+    child: Child,
+    pid: u32,
+    cfg: ServiceConfig,
+    restart_count: u32,
+}
+
+pub fn run(config_path: String) {
+    // Signal handler for graceful shutdown
+    let handler = nix::sys::signal::SigHandler::Handler(handle_sigterm);
+    let sig_action = nix::sys::signal::SigAction::new(
+        handler,
+        nix::sys::signal::SaFlags::SA_RESTART,
+        nix::sys::signal::SigSet::empty(),
+    );
+    unsafe {
+        let _ = nix::sys::signal::sigaction(nix::sys::signal::Signal::SIGTERM, &sig_action);
+        let _ = nix::sys::signal::sigaction(nix::sys::signal::Signal::SIGINT, &sig_action);
+    }
+
+    // Write daemon PID
+    let pid_path = crate::ipc::daemon_pid_path();
+    State::write_pid(&pid_path).ok();
+
+    // Ensure socket path is clean
+    let sock_path = crate::ipc::socket_path();
+    if sock_path.exists() {
+        let _ = std::fs::remove_file(&sock_path);
+    }
+    if let Some(parent) = sock_path.parent() {
+        let _ = std::fs::create_dir_all(parent);
+    }
+
+    // Load config
+    let mut config = match Config::load(&config_path) {
+        Ok(c) => c,
+        Err(e) => {
+            eprintln!("error: config: {}", e);
+            return;
+        }
+    };
+
+    let listener = UnixListener::bind(&sock_path).expect("bind socket");
+    listener.set_nonblocking(true).ok();
+
+    let state = State::new();
+    let mut procs: HashMap<String, Proc> = HashMap::new();
+    let mut last_mtime: Option<SystemTime> = config_mtime(&config_path);
+
+    // Start enabled services
+    start_enabled(&config, &state, &mut procs);
+
+    // Main loop
+    loop {
+        if STOP.load(Ordering::Relaxed) {
+            stop_all(&mut procs);
+            let _ = std::fs::remove_file(&sock_path);
+            let _ = std::fs::remove_file(&pid_path);
+            return;
+        }
+
+        // Poll config for changes
+        if let Some(mtime) = config_mtime(&config_path) {
+            if Some(mtime) != last_mtime {
+                last_mtime = Some(mtime);
+                let new_config = Config::load(&config_path);
+                if let Ok(new_config) = new_config {
+                    reconcile(&new_config, &state, &mut procs);
+                    config = new_config;
+                }
+            }
+        }
+
+        // Check children
+        check_children(&mut procs);
+
+        // Accept socket connections
+        while let Ok((stream, _)) = listener.accept() {
+            handle_client(stream, &config, &state, &mut procs, &config_path);
+        }
+
+        std::thread::sleep(Duration::from_millis(200));
+    }
+}
+
+fn config_mtime(path: &str) -> Option<SystemTime> {
+    std::fs::metadata(path).ok().and_then(|m| m.modified().ok())
+}
+
+fn start_enabled(config: &Config, state: &State, procs: &mut HashMap<String, Proc>) {
+    if let Ok(enabled) = state.list_enabled() {
+        for name in &enabled {
+            if let Some(cfg) = config.service.get(name) {
+                if !procs.contains_key(name) {
+                    if let Some(p) = spawn(name, cfg) {
+                        procs.insert(name.clone(), p);
+                    }
+                }
+            }
+        }
+    }
+}
+
+fn reconcile(new_config: &Config, state: &State, procs: &mut HashMap<String, Proc>) {
+    let old_names: Vec<String> = procs.keys().cloned().collect();
+
+    for name in &old_names {
+        if !new_config.service.contains_key(name) {
+            stop(name, procs);
+        }
+    }
+
+    for (name, cfg) in &new_config.service {
+        if !procs.contains_key(name) && state.is_enabled(name) {
+            if let Some(p) = spawn(name, cfg) {
+                procs.insert(name.clone(), p);
+            }
+        }
+    }
+}
+
+fn spawn(name: &str, cfg: &ServiceConfig) -> Option<Proc> {
+    let log_path = format!(
+        "{}/.local/share/rss/logs/{}.log",
+        std::env::var("HOME").unwrap_or_default(),
+        name
+    );
+    if let Some(parent) = std::path::Path::new(&log_path).parent() {
+        let _ = std::fs::create_dir_all(parent);
+    }
+
+    let cmd = cfg.resolve_command(name, &log_path);
+    let mut child = match Command::new("sh")
+        .arg("-c")
+        .arg(&cmd)
+        .current_dir(&cfg.workdir)
+        .envs(&cfg.env)
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped())
+        .stdin(Stdio::null())
+        .spawn()
+    {
+        Ok(c) => c,
+        Err(e) => {
+            append_log(&log_path, &format!("E: spawn failed: {}", e));
+            return None;
+        }
+    };
+
+    let pid = child.id();
+    let log_out = log_path.clone();
+    let log_err = log_path.clone();
+
+    if let Some(stdout) = child.stdout.take() {
+        std::thread::spawn(move || {
+            for line in BufReader::new(stdout).lines() {
+                if let Ok(l) = line {
+                    append_log(&log_out, &format!("O: {}", l));
+                }
+            }
+        });
+    }
+    if let Some(stderr) = child.stderr.take() {
+        std::thread::spawn(move || {
+            for line in BufReader::new(stderr).lines() {
+                if let Ok(l) = line {
+                    append_log(&log_err, &format!("E: {}", l));
+                }
+            }
+        });
+    }
+
+    append_log(&log_path, &format!("O: started (pid {})", pid));
+
+    Some(Proc {
+        child,
+        pid,
+        cfg: cfg.clone(),
+        restart_count: 0,
+    })
+}
+
+fn stop(name: &str, procs: &mut HashMap<String, Proc>) {
+    let p = match procs.get(name) {
+        Some(p) => p,
+        None => return,
+    };
+
+    let pid = p.pid;
+    let log_path = format!(
+        "{}/.local/share/rss/logs/{}.log",
+        std::env::var("HOME").unwrap_or_default(),
+        name
+    );
+
+    // stop_command
+    if let Some(cmd) = p.cfg.resolve_stop_command(name, pid, &log_path) {
+        let _ = Command::new("sh").arg("-c").arg(&cmd).output();
+    }
+
+    // signal
+    let sig = crate::supervisor::parse_signal(&p.cfg.stop_signal);
+    let _ = nix::sys::signal::kill(nix::unistd::Pid::from_raw(pid as i32), sig);
+
+    // wait
+    let deadline = std::time::Instant::now() + Duration::from_secs(p.cfg.timeout_stop);
+    while std::time::Instant::now() < deadline {
+        if let Ok(Some(_)) = procs.get_mut(name).unwrap().child.try_wait() {
+            break;
+        }
+        std::thread::sleep(Duration::from_millis(100));
+    }
+
+    // force kill
+    if let Ok(None) = procs.get_mut(name).unwrap().child.try_wait() {
+        let _ = nix::sys::signal::kill(
+            nix::unistd::Pid::from_raw(pid as i32),
+            nix::sys::signal::Signal::SIGKILL,
+        );
+        let _ = procs.get_mut(name).unwrap().child.wait();
+    } else {
+        let _ = procs.get_mut(name).unwrap().child.wait();
+    }
+
+    append_log(&log_path, "O: stopped");
+    procs.remove(name);
+}
+
+fn stop_all(procs: &mut HashMap<String, Proc>) {
+    let names: Vec<String> = procs.keys().cloned().collect();
+    for name in &names {
+        if procs.contains_key(name) {
+            stop(name, procs);
+        }
+    }
+}
+
+fn check_children(procs: &mut HashMap<String, Proc>) {
+    let mut dead = Vec::new();
+    let mut restarts = Vec::new();
+
+    for (name, p) in procs.iter_mut() {
+        if let Ok(Some(status)) = p.child.try_wait() {
+            let log_path = format!(
+                "{}/.local/share/rss/logs/{}.log",
+                std::env::var("HOME").unwrap_or_default(),
+                name
+            );
+
+            let code = status
+                .code()
+                .map(|c| format!("code {}", c))
+                .unwrap_or_else(|| "signal".to_string());
+
+            append_log(&log_path, &format!("O: exited with {}", code));
+
+            if p.cfg.oneshot {
+                dead.push(name.clone());
+                continue;
+            }
+
+            let should = match p.cfg.restart {
+                RestartPolicy::No => false,
+                RestartPolicy::Always | RestartPolicy::UnlessStopped => true,
+                RestartPolicy::OnFailure => !status.success(),
+            };
+
+            let max = if p.cfg.restart_max == 0 {
+                u32::MAX
+            } else {
+                p.cfg.restart_max
+            };
+
+            if should && p.restart_count < max {
+                p.restart_count += 1;
+                let max_str = if p.cfg.restart_max == 0 {
+                    "unlimited".to_string()
+                } else {
+                    p.cfg.restart_max.to_string()
+                };
+                append_log(
+                    &log_path,
+                    &format!(
+                        "O: restarting in {}s (attempt {}/{})",
+                        p.cfg.restart_delay,
+                        p.restart_count,
+                        max_str
+                    ),
+                );
+                restarts.push((name.clone(), p.cfg.clone()));
+                dead.push(name.clone());
+            } else {
+                if p.cfg.restart != RestartPolicy::No {
+                    append_log(&log_path, "O: max restarts reached, exiting");
+                }
+                dead.push(name.clone());
+            }
+        }
+    }
+
+    for name in &dead {
+        procs.remove(name);
+    }
+    for (name, cfg) in &restarts {
+        std::thread::sleep(Duration::from_secs(cfg.restart_delay));
+        if let Some(p) = spawn(name, cfg) {
+            procs.insert(name.clone(), p);
+        }
+    }
+}
+
+fn handle_client(
+    mut stream: UnixStream,
+    config: &Config,
+    state: &State,
+    procs: &mut HashMap<String, Proc>,
+    _config_path: &str,
+) {
+    let mut line = String::new();
+    let mut reader = BufReader::new(&stream);
+    if reader.read_line(&mut line).is_err() {
+        return;
+    }
+    let line = line.trim();
+
+    let response = match line {
+        l if l.starts_with("start ") => {
+            let name = &l[6..];
+            if !config.service.contains_key(name) {
+                format!("error: service '{}' not found", name)
+            } else if procs.contains_key(name) {
+                format!("error: '{}' already running", name)
+            } else {
+                match spawn(name, &config.service[name]) {
+                    Some(p) => {
+                        let pid = p.pid;
+                        procs.insert(name.to_string(), p);
+                        format!("ok {}", pid)
+                    }
+                    None => format!("error: failed to spawn '{}'", name),
+                }
+            }
+        }
+        l if l.starts_with("stop ") => {
+            let name = &l[5..];
+            if !procs.contains_key(name) {
+                format!("error: '{}' not running", name)
+            } else {
+                stop(name, procs);
+                "ok".to_string()
+            }
+        }
+        l if l.starts_with("restart ") => {
+            let name = &l[8..];
+            if procs.contains_key(name) {
+                stop(name, procs);
+            }
+            if let Some(cfg) = config.service.get(name) {
+                match spawn(name, cfg) {
+                    Some(p) => {
+                        let pid = p.pid;
+                        procs.insert(name.to_string(), p);
+                        format!("ok {}", pid)
+                    }
+                    None => format!("error: failed to spawn '{}'", name),
+                }
+            } else {
+                format!("error: service '{}' not found", name)
+            }
+        }
+        "list" | "list " => {
+            let mut out = Vec::new();
+            for (name, _cfg) in &config.service {
+                let enabled = if state.is_enabled(name) { "yes" } else { "no" };
+                let info = if let Some(p) = procs.get(name) {
+                    format!("running {} pid={} enabled={}", name, p.pid, enabled)
+                } else {
+                    format!("stopped {} pid=0 enabled={}", name, enabled)
+                };
+                out.push(info);
+            }
+            out.join("\n")
+        }
+        l if l.starts_with("status ") => {
+            let name = &l[7..];
+            let enabled = if state.is_enabled(name) { "yes" } else { "no" };
+            if let Some(p) = procs.get(name) {
+                format!("running {} pid={} enabled={}", name, p.pid, enabled)
+            } else if config.service.contains_key(name) {
+                format!("stopped {} pid=0 enabled={}", name, enabled)
+            } else {
+                format!("error: service '{}' not found", name)
+            }
+        }
+        "status" => {
+            let mut out = Vec::new();
+            for (name, _) in &config.service {
+                let enabled = if state.is_enabled(name) { "yes" } else { "no" };
+                let info = if let Some(p) = procs.get(name) {
+                    format!("running {} pid={} enabled={}", name, p.pid, enabled)
+                } else {
+                    format!("stopped {} pid=0 enabled={}", name, enabled)
+                };
+                out.push(info);
+            }
+            out.join("\n")
+        }
+        _ => format!("error: unknown command '{}'", line),
+    };
+
+    let _ = writeln!(stream, "{}", response);
+    let _ = stream.flush();
+}
+
+fn append_log(path: &str, msg: &str) {
+    let ts = chrono::Local::now().format("%Y-%m-%d %H:%M:%S");
+    if let Ok(mut f) = std::fs::OpenOptions::new()
+        .create(true)
+        .append(true)
+        .open(path)
+    {
+        let _ = writeln!(f, "[{}] {}", ts, msg);
+        let _ = f.flush();
+    }
+}

src/ipc.rs

@@ -0,0 +1,40 @@
+use std::io::{BufRead, BufReader, Write};
+use std::os::unix::net::UnixStream;
+use std::path::PathBuf;
+
+pub fn socket_path() -> PathBuf {
+    let home = std::env::var("HOME").expect("HOME not set");
+    PathBuf::from(format!("{}/.local/share/rss/rss.sock", home))
+}
+
+pub fn daemon_pid_path() -> PathBuf {
+    let home = std::env::var("HOME").expect("HOME not set");
+    PathBuf::from(format!("{}/.local/share/rss/daemon.pid", home))
+}
+
+pub fn send_cmd(cmd: &str) -> Result<Vec<String>, String> {
+    let path = socket_path();
+
+    if path.exists() {
+        if UnixStream::connect(&path).is_err() {
+            let _ = std::fs::remove_file(&path);
+        }
+    }
+
+    let mut stream = UnixStream::connect(&path).map_err(|e| format!("daemon not running: {}", e))?;
+    writeln!(stream, "{}", cmd).map_err(|e| format!("write: {}", e))?;
+    stream.flush().map_err(|e| format!("flush: {}", e))?;
+
+    let mut lines = Vec::new();
+    for line in BufReader::new(&stream).lines() {
+        let line = line.map_err(|e| format!("read: {}", e))?;
+        if line == "ok" {
+            return Ok(lines);
+        }
+        if let Some(msg) = line.strip_prefix("error:") {
+            return Err(msg.trim().to_string());
+        }
+        lines.push(line);
+    }
+    Ok(lines)
+}

src/main.rs

@@ -1,60 +1,35 @@
 mod cli;
 mod config;
+mod daemon;
+mod ipc;
 mod log;
 mod state;
 mod supervisor;
 
-use std::process::{Command, Stdio};
-
 use clap::Parser;
 use cli::{Cli, Commands};
-use config::Config;
 use state::State;
-use supervisor::{parse_signal, process_running, wait_for_exit};
 
 fn main() {
     let cli = Cli::parse();
 
-    // Internal supervise subcommand — must run before config loading?
-    if let Commands::Supervise { ref name } = cli.command {
-        let config_path = resolve_config_path(cli.config.as_deref());
-        let config = Config::load(&config_path).unwrap_or_else(|e| {
-            eprintln!("error: config: {}", e);
-            std::process::exit(1);
-        });
-        let cfg = match config.service.get(name) {
-            Some(c) => c,
-            None => {
-                eprintln!("error: service '{}' not found in config", name);
-                std::process::exit(1);
-            }
-        };
-        supervisor::run_supervisor(name, cfg);
-        return;
-    }
-
-    let config_path = resolve_config_path(cli.config.as_deref());
-    let config = Config::load(&config_path).unwrap_or_else(|e| {
-        eprintln!("error: config: {}", e);
-        std::process::exit(1);
-    });
-
-    let state = State::new();
-
     match cli.command {
-        Commands::Start { name } => cmd_start(&name, &config, &config_path),
-        Commands::Stop { name } => cmd_stop(&name, &config, &state),
-        Commands::Restart { name } => {
-            cmd_stop(&name, &config, &state);
-            cmd_start(&name, &config, &config_path);
+        Commands::Daemon => {
+            let config_path = resolve_config_path(cli.config.as_deref());
+            daemon::run(config_path);
+        }
+        Commands::Start { ref name } => cmd_start(name),
+        Commands::Stop { ref name } => cmd_stop(name),
+        Commands::Restart { ref name } => cmd_restart(name),
+        Commands::Status { ref name } => cmd_status(name.as_deref()),
+        Commands::List => cmd_list(),
+        Commands::Logs { ref name, lines, follow } => cmd_logs(name, lines, follow),
+        Commands::Enable { ref name, now } => cmd_enable(name, now),
+        Commands::Disable { ref name } => cmd_disable(name),
+        Commands::Supervise { .. } => {
+            eprintln!("error: supervise is internal, use daemon");
+            std::process::exit(1);
         }
-        Commands::Status { name } => cmd_status(name.as_deref(), &config, &state),
-        Commands::Logs { name, lines, follow } => cmd_logs(&name, lines, follow),
-        Commands::Enable { name, now } => cmd_enable(&name, now, &config, &state, &config_path),
-        Commands::Disable { name } => cmd_disable(&name, &state),
-        Commands::List => cmd_list(&config, &state),
-        Commands::Daemon => cmd_daemon(&config, &state, &config_path),
-        Commands::Supervise { .. } => unreachable!(),
     }
 }
 
@@ -69,171 +44,116 @@ fn resolve_config_path(custom: Option<&str>) -> String {
     format!("{}/.config/rss/config.toml", home)
 }
 
-fn cmd_start(name: &str, config: &Config, config_path: &str) {
-    if !config.service.contains_key(name) {
-        eprintln!("error: service '{}' not found in config", name);
-        std::process::exit(1);
-    }
-    let state = State::new();
-    let svc_pid = state.service_pid_path(name);
-    if State::read_pid(&svc_pid).map_or(false, |p| process_running(p)) {
-        eprintln!("error: '{}' is already running", name);
-        std::process::exit(1);
-    }
-    let self_exe = std::env::current_exe().unwrap_or_else(|_| {
-        eprintln!("error: cannot determine binary path");
-        std::process::exit(1);
-    });
-
-    let child = Command::new(&self_exe)
-        .arg("supervise")
-        .arg(name)
-        .env("RSS_CONFIG", config_path)
-        .stdout(Stdio::null())
-        .stderr(Stdio::null())
-        .stdin(Stdio::null())
-        .spawn()
-        .unwrap_or_else(|e| {
-            eprintln!("error: failed to start supervisor: {}", e);
+fn cmd_start(name: &str) {
+    match ipc::send_cmd(&format!("start {}", name)) {
+        Ok(lines) => {
+            if let Some(first) = lines.first() {
+                println!("{}", first);
+            }
+        }
+        Err(e) => {
+            eprintln!("error: {}", e);
             std::process::exit(1);
-        });
-
-    println!("{}", child.id());
-    // Detach — forget the child so it becomes orphaned and adopted by init
-    std::mem::forget(child);
+        }
+    }
 }
 
-fn cmd_stop(name: &str, config: &Config, state: &State) {
-    let cfg = match config.service.get(name) {
-        Some(c) => c,
-        None => {
-            eprintln!("error: service '{}' not found", name);
-            return;
+fn cmd_stop(name: &str) {
+    match ipc::send_cmd(&format!("stop {}", name)) {
+        Ok(_) => {}
+        Err(e) => {
+            eprintln!("error: {}", e);
+            std::process::exit(1);
         }
+    }
+}
+
+fn cmd_restart(name: &str) {
+    match ipc::send_cmd(&format!("restart {}", name)) {
+        Ok(lines) => {
+            if let Some(first) = lines.first() {
+                println!("{}", first);
+            }
+        }
+        Err(e) => {
+            eprintln!("error: {}", e);
+            std::process::exit(1);
+        }
+    }
+}
+
+fn cmd_status(name: Option<&str>) {
+    let cmd = match name {
+        Some(n) => format!("status {}", n),
+        None => "status".to_string(),
     };
-
-    let svc_pid_path = state.service_pid_path(name);
-    let sup_pid_path = state.supervise_pid_path(name);
-    let log_path = state.log_path(name);
-    let log_str = log_path.to_str().unwrap_or("");
-
-    // Tell supervisor to stop (sets TERMINATE flag) first
-    if let Some(pid) = State::read_pid(&sup_pid_path) {
-        if process_running(pid) {
-            let _ = nix::sys::signal::kill(
-                nix::unistd::Pid::from_raw(pid as i32),
-                nix::sys::signal::Signal::SIGTERM,
-            );
-        }
-    }
-
-    // Stop child process
-    if let Some(pid) = State::read_pid(&svc_pid_path) {
-        if process_running(pid) {
-            // Run stop_command if configured
-            if let Some(stop_cmd) = cfg.resolve_stop_command(name, pid, log_str) {
-                let _ = Command::new("sh").arg("-c").arg(&stop_cmd).current_dir(&cfg.workdir).output();
-            }
-
-            // Send configured signal
-            let sig = parse_signal(&cfg.stop_signal);
-            let _ = nix::sys::signal::kill(nix::unistd::Pid::from_raw(pid as i32), sig);
-
-            // Wait for graceful exit
-            wait_for_exit(pid, cfg.timeout_stop);
-
-            // Force kill if still alive
-            if process_running(pid) {
-                let _ = nix::sys::signal::kill(
-                    nix::unistd::Pid::from_raw(pid as i32),
-                    nix::sys::signal::Signal::SIGKILL,
-                );
-                wait_for_exit(pid, 3);
+    match ipc::send_cmd(&cmd) {
+        Ok(lines) => {
+            for line in lines {
+                println!("{}", line);
             }
         }
-    }
-
-    // Wait for supervisor to exit (it sees TERMINATE + child dead)
-    if let Some(pid) = State::read_pid(&sup_pid_path) {
-        if process_running(pid) {
-            wait_for_exit(pid, 3);
-            if process_running(pid) {
-                let _ = nix::sys::signal::kill(
-                    nix::unistd::Pid::from_raw(pid as i32),
-                    nix::sys::signal::Signal::SIGKILL,
-                );
-                wait_for_exit(pid, 3);
-            }
-        }
-    }
-
-    // Cleanup PID files
-    State::remove_pid(&svc_pid_path);
-    State::remove_pid(&sup_pid_path);
-}
-
-fn cmd_status(name: Option<&str>, config: &Config, state: &State) {
-    if let Some(name) = name {
-        print_service_status(name, config, state);
-    } else {
-        let mut names: Vec<&String> = config.service.keys().collect();
-        names.sort();
-        for name in names {
-            print_service_status(name, config, state);
+        Err(e) => {
+            eprintln!("error: {}", e);
+            std::process::exit(1);
         }
     }
 }
 
-fn print_service_status(name: &str, _config: &Config, state: &State) {
-    let svc_pid_path = state.service_pid_path(name);
-    let sup_pid_path = state.supervise_pid_path(name);
-    let enabled = state.is_enabled(name);
-
-    let svc_pid = State::read_pid(&svc_pid_path);
-    let sup_pid = State::read_pid(&sup_pid_path);
-
-    let svc_running = svc_pid.map_or(false, process_running);
-    let sup_running = sup_pid.map_or(false, process_running);
-
-    let status = if svc_running {
-        "running"
-    } else if sup_running {
-        "restarting"
-    } else {
-        "stopped"
-    };
-
-    let enabled_str = if enabled { "+" } else { "-" };
-    println!(
-        "{} {} pid={} supervisor={} enabled={}",
-        status,
-        name,
-        svc_pid.map_or(0, |p| p),
-        sup_pid.map_or(0, |p| p),
-        enabled_str,
-    );
+fn cmd_list() {
+    match ipc::send_cmd("list") {
+        Ok(lines) => {
+            if lines.is_empty() {
+                println!("no services configured");
+                return;
+            }
+            for line in &lines {
+                let parts: Vec<&str> = line.splitn(4, ' ').collect();
+                if parts.len() >= 4 {
+                    println!("{:<12} {:<7} {:>6}  {}", parts[0], parts[1], parts[2], parts[3]);
+                } else {
+                    println!("{}", line);
+                }
+            }
+        }
+        Err(e) => {
+            eprintln!("error: {}", e);
+            std::process::exit(1);
+        }
+    }
 }
 
 fn cmd_logs(name: &str, mut lines: Option<usize>, follow: bool) {
     if lines.is_none() && follow {
         lines = Some(10);
     }
+
     let state = State::new();
     let log_path = state.log_path(name);
-    let log_str = log_path.to_str().unwrap_or("");
 
     if !log_path.exists() {
         eprintln!("error: no logs for '{}'", name);
         std::process::exit(1);
     }
 
-    if let Err(e) = log::show_logs(log_str, lines, follow) {
+    if let Err(e) = log::show_logs(log_path.to_str().unwrap_or(""), lines, follow) {
         eprintln!("error: reading logs: {}", e);
         std::process::exit(1);
     }
 }
 
-fn cmd_enable(name: &str, now: bool, config: &Config, state: &State, config_path: &str) {
+fn cmd_enable(name: &str, now: bool) {
+    let state = State::new();
+
+    let config_path = resolve_config_path(None);
+    let config = match config::Config::load(&config_path) {
+        Ok(c) => c,
+        Err(e) => {
+            eprintln!("error: config: {}", e);
+            std::process::exit(1);
+        }
+    };
+
     if !config.service.contains_key(name) {
         eprintln!("error: service '{}' not found in config", name);
         return;
@@ -247,120 +167,12 @@ fn cmd_enable(name: &str, now: bool, config: &Config, state: &State, config_path
     println!("enabled {}", name);
 
     if now {
-        cmd_start(name, config, config_path);
+        cmd_start(name);
     }
 }
 
-fn cmd_disable(name: &str, state: &State) {
+fn cmd_disable(name: &str) {
+    let state = State::new();
     state.disable(name);
     println!("disabled {}", name);
 }
-
-fn cmd_list(config: &Config, state: &State) {
-    cleanup_orphans(config, state);
-    let mut names: Vec<&String> = config.service.keys().collect();
-    names.sort();
-
-    if names.is_empty() {
-        println!("no services configured");
-        return;
-    }
-
-    println!("{:<12} {:<7} {:>6} {:>6}  {}", "status", "name", "pid", "super", "enabled");
-    println!("{}", "-".repeat(50));
-    for name in names {
-        let svc_pid_path = state.service_pid_path(name);
-        let sup_pid_path = state.supervise_pid_path(name);
-        let enabled = state.is_enabled(name);
-
-        let svc_pid = State::read_pid(&svc_pid_path);
-        let sup_pid = State::read_pid(&sup_pid_path);
-
-        let svc_running = svc_pid.map_or(false, process_running);
-        let sup_running = sup_pid.map_or(false, process_running);
-
-        let status = if svc_running {
-            "running"
-        } else if sup_running {
-            "restart"
-        } else {
-            "stopped"
-        };
-
-        let enabled_str = if enabled { "yes" } else { "no" };
-        println!(
-            "{:<12} {:<7} {:>6} {:>6}  {}",
-            status,
-            name,
-            svc_pid.map_or(0, |p| p),
-            sup_pid.map_or(0, |p| p),
-            enabled_str,
-        );
-    }
-}
-
-fn cleanup_orphans(config: &Config, state: &State) {
-    for name in State::list_pid_names(&state.supervise_dir()) {
-        if !config.service.contains_key(&name) {
-            stop_orphan(&name, state);
-        }
-    }
-    for name in State::list_pid_names(&state.service_dir()) {
-        if !config.service.contains_key(&name) {
-            State::remove_pid(&state.service_pid_path(&name));
-        }
-    }
-}
-
-fn stop_orphan(name: &str, state: &State) {
-    let svc = state.service_pid_path(name);
-    let sup = state.supervise_pid_path(name);
-
-    if let Some(pid) = State::read_pid(&svc) {
-        if process_running(pid) {
-            let _ = nix::sys::signal::kill(
-                nix::unistd::Pid::from_raw(pid as i32),
-                nix::sys::signal::Signal::SIGTERM,
-            );
-            wait_for_exit(pid, 5);
-            if process_running(pid) {
-                let _ = nix::sys::signal::kill(
-                    nix::unistd::Pid::from_raw(pid as i32),
-                    nix::sys::signal::Signal::SIGKILL,
-                );
-                wait_for_exit(pid, 3);
-            }
-        }
-    }
-    if let Some(pid) = State::read_pid(&sup) {
-        if process_running(pid) {
-            let _ = nix::sys::signal::kill(
-                nix::unistd::Pid::from_raw(pid as i32),
-                nix::sys::signal::Signal::SIGKILL,
-            );
-            wait_for_exit(pid, 3);
-        }
-    }
-    State::remove_pid(&svc);
-    State::remove_pid(&sup);
-}
-
-fn cmd_daemon(config: &Config, state: &State, config_path: &str) {
-    cleanup_orphans(config, state);
-
-    let enabled = state.list_enabled().unwrap_or_default();
-    if enabled.is_empty() {
-        println!("no enabled services");
-        return;
-    }
-
-    for name in &enabled {
-        let svc_pid_path = state.service_pid_path(name);
-        let already = State::read_pid(&svc_pid_path).map_or(false, |p| process_running(p));
-        if already {
-            continue;
-        }
-        println!("{}", name);
-        cmd_start(name, config, config_path);
-    }
-}

src/state.rs

@@ -1,7 +1,7 @@
 use std::path::PathBuf;
 
 pub struct State {
-    state_dir: PathBuf,
+    pub state_dir: PathBuf,
     config_dir: PathBuf,
 }
 
@@ -14,66 +14,19 @@ impl State {
         }
     }
 
-    pub fn supervise_pid_path(&self, name: &str) -> PathBuf {
-        self.state_dir.join("supervise").join(format!("{}.pid", name))
-    }
-
-    pub fn service_pid_path(&self, name: &str) -> PathBuf {
-        self.state_dir.join("service").join(format!("{}.pid", name))
-    }
-
     pub fn log_path(&self, name: &str) -> PathBuf {
         self.state_dir.join("logs").join(format!("{}.log", name))
     }
 
-    pub fn supervise_dir(&self) -> PathBuf {
-        self.state_dir.join("supervise")
-    }
-
-    pub fn service_dir(&self) -> PathBuf {
-        self.state_dir.join("service")
-    }
-
     pub fn enabled_path(&self, name: &str) -> PathBuf {
         self.config_dir.join("enabled").join(name)
     }
 
-    pub fn list_pid_names(dir: &PathBuf) -> Vec<String> {
-        let mut names = Vec::new();
-        if let Ok(entries) = std::fs::read_dir(dir) {
-            for entry in entries.flatten() {
-                let fname = entry.file_name();
-                let fname = fname.to_string_lossy().to_string();
-                if let Some(stripped) = fname.strip_suffix(".pid") {
-                    names.push(stripped.to_string());
-                }
-            }
-        }
-        names
-    }
-
     pub fn write_pid(path: &PathBuf) -> std::io::Result<()> {
-        Self::write_pid_with(path, std::process::id())
-    }
-
-    pub fn write_pid_with(path: &PathBuf, pid: u32) -> std::io::Result<()> {
         if let Some(parent) = path.parent() {
             std::fs::create_dir_all(parent)?;
         }
-        std::fs::write(path, format!("{}", pid))
-    }
-
-    pub fn read_pid(path: &PathBuf) -> Option<u32> {
-        let content = std::fs::read_to_string(path).ok()?;
-        content.trim().parse().ok()
-    }
-
-    pub fn remove_pid(path: &PathBuf) {
-        let _ = std::fs::remove_file(path);
-    }
-
-    pub fn process_exists(pid: u32) -> bool {
-        std::path::Path::new(&format!("/proc/{}", pid)).exists()
+        std::fs::write(path, format!("{}", std::process::id()))
     }
 
     pub fn is_enabled(&self, name: &str) -> bool {

src/supervisor.rs

@@ -1,172 +1,4 @@
-use std::io::{BufRead, Write};
-use std::process::{Child, Command, Stdio};
-use std::sync::atomic::{AtomicBool, Ordering};
-use std::time::Duration;
-
-use chrono::Local;
-use nix::sys::signal::{self, SigAction, SigHandler, Signal};
-
-use crate::config::{RestartPolicy, ServiceConfig};
-use crate::state::State;
-
-pub static TERMINATE: AtomicBool = AtomicBool::new(false);
-
-extern "C" fn sigterm_handler(_: i32) {
-    TERMINATE.store(true, Ordering::Relaxed);
-}
-
-pub fn setup_signal_handler() {
-    let handler = SigHandler::Handler(sigterm_handler);
-    let action = SigAction::new(handler, nix::sys::signal::SaFlags::SA_RESTART, signal::SigSet::empty());
-    unsafe {
-        let _ = signal::sigaction(Signal::SIGTERM, &action);
-        let _ = signal::sigaction(Signal::SIGINT, &action);
-    }
-}
-
-pub fn run_supervisor(name: &str, cfg: &ServiceConfig) {
-    setup_signal_handler();
-
-    let state = State::new();
-    let supervise_pid = state.supervise_pid_path(name);
-    let service_pid = state.service_pid_path(name);
-    let log_path = state.log_path(name);
-
-    State::write_pid(&supervise_pid).ok();
-
-    if let Some(parent) = log_path.parent() {
-        std::fs::create_dir_all(parent).ok();
-    }
-
-    let mut restarts: u32 = 0;
-    let max_restarts = if cfg.restart_max == 0 { u32::MAX } else { cfg.restart_max };
-
-    loop {
-        let cmd = cfg.resolve_command(name, log_path.to_str().unwrap_or(""));
-        let log_file = log_path.to_str().unwrap_or("").to_string();
-
-        let mut child = match spawn_child(name, cfg, &cmd, &log_file) {
-            Ok(c) => c,
-            Err(e) => {
-                append_log(&log_file, &format!("E: failed to spawn: {}", e));
-                break;
-            }
-        };
-
-        let child_pid = child.id();
-        State::write_pid_with(&service_pid, child_pid).ok();
-
-        append_log(&log_file, &format!("O: started (pid {})", child_pid));
-
-        let status = child.wait();
-
-        match status {
-            Ok(status) => {
-                let code = status.code().map(|c| format!("code {}", c)).unwrap_or_else(|| "signal".to_string());
-                append_log(&log_file, &format!("O: exited with {}", code));
-
-                if TERMINATE.load(Ordering::Relaxed) {
-                    append_log(&log_file, "O: supervisor received stop signal, exiting");
-                    break;
-                }
-
-                if cfg.oneshot {
-                    append_log(&log_file, "O: oneshot service completed, exiting");
-                    break;
-                }
-
-                let should_restart = match cfg.restart {
-                    RestartPolicy::No => false,
-                    RestartPolicy::Always | RestartPolicy::UnlessStopped => true,
-                    RestartPolicy::OnFailure => !status.success(),
-                };
-
-                if should_restart && restarts < max_restarts {
-                    restarts += 1;
-                    let max_str = if cfg.restart_max == 0 {
-                        "unlimited".to_string()
-                    } else {
-                        cfg.restart_max.to_string()
-                    };
-                    append_log(
-                        &log_file,
-                        &format!("O: restarting in {}s (attempt {}/{})", cfg.restart_delay, restarts, max_str),
-                    );
-                    std::thread::sleep(Duration::from_secs(cfg.restart_delay));
-                } else {
-                    if cfg.restart != RestartPolicy::No {
-                        append_log(&log_file, "O: max restarts reached, exiting");
-                    }
-                    break;
-                }
-            }
-            Err(e) => {
-                append_log(&log_file, &format!("E: wait error: {}", e));
-                break;
-            }
-        }
-    }
-
-    State::remove_pid(&service_pid);
-    State::remove_pid(&supervise_pid);
-
-    // Give pipe-reader threads time to flush
-    std::thread::sleep(Duration::from_millis(200));
-}
-
-fn spawn_child(
-    _name: &str,
-    cfg: &ServiceConfig,
-    cmd: &str,
-    log_file: &str,
-) -> std::io::Result<Child> {
-    let mut child = Command::new("sh")
-        .arg("-c")
-        .arg(cmd)
-        .current_dir(&cfg.workdir)
-        .envs(&cfg.env)
-        .stdout(Stdio::piped())
-        .stderr(Stdio::piped())
-        .stdin(Stdio::null())
-        .spawn()?;
-
-    let stdout = child.stdout.take().unwrap();
-    let stderr = child.stderr.take().unwrap();
-
-    let log_out = log_file.to_string();
-    std::thread::spawn(move || {
-        let reader = std::io::BufReader::new(stdout);
-        for line in reader.lines() {
-            if let Ok(line) = line {
-                append_log(&log_out, &format!("O: {}", line));
-            }
-        }
-    });
-
-    let log_err = log_file.to_string();
-    std::thread::spawn(move || {
-        let reader = std::io::BufReader::new(stderr);
-        for line in reader.lines() {
-            if let Ok(line) = line {
-                append_log(&log_err, &format!("E: {}", line));
-            }
-        }
-    });
-
-    Ok(child)
-}
-
-fn append_log(path: &str, msg: &str) {
-    if let Ok(mut file) = std::fs::OpenOptions::new()
-        .create(true)
-        .append(true)
-        .open(path)
-    {
-        let ts = Local::now().format("%Y-%m-%d %H:%M:%S");
-        let _ = writeln!(file, "[{}] {}", ts, msg);
-        let _ = file.flush();
-    }
-}
+use nix::sys::signal::Signal;
 
 pub fn parse_signal(name: &str) -> Signal {
     match name.to_uppercase().as_str() {
@@ -180,17 +12,3 @@ pub fn parse_signal(name: &str) -> Signal {
         _ => Signal::SIGTERM,
     }
 }
-
-pub fn process_running(pid: u32) -> bool {
-    State::process_exists(pid)
-}
-
-pub fn wait_for_exit(pid: u32, timeout_secs: u64) {
-    let deadline = std::time::Instant::now() + Duration::from_secs(timeout_secs);
-    while std::time::Instant::now() < deadline {
-        if !process_running(pid) {
-            return;
-        }
-        std::thread::sleep(Duration::from_millis(100));
-    }
-}