fix(supervisor): keep service-managed children attached (#38463, thanks @spirittechie)

Co-authored-by: Jesse Paul <drzin69@gmail.com>

CHANGELOG.md

@@ -282,6 +282,7 @@ Docs: https://docs.openclaw.ai
 - Config/env substitution degraded mode: convert missing `${VAR}` resolution in config reads from hard-fail to warning-backed degraded behavior, while preventing unresolved placeholders from being accepted as gateway credentials. (#39050) Thanks @akz142857.
 - Discord inbound listener non-blocking dispatch: make `MESSAGE_CREATE` listener handoff asynchronous (no per-listener queue blocking), so long runs no longer stall unrelated incoming events. (#39154) Thanks @yaseenkadlemakki.
 - Daemon/Windows PATH freeze fix: stop persisting install-time `PATH` snapshots into Scheduled Task scripts so runtime tool lookup follows current host PATH updates; also refresh local TUI history on silent local finals. (#39139) Thanks @Narcooo.
+- Gateway/systemd service restart hardening: clear stale gateway listeners by explicit run-port before service bind, add restart stale-pid port-override support, tune systemd start/stop/exit handling, and disable detached child mode only in service-managed runtime so cgroup stop semantics clean up descendants reliably. (#38463) Thanks @spirittechie.
 
 ## 2026.3.2
 

src/process/supervisor/adapters/child.test.ts

@@ -49,6 +49,8 @@ async function createAdapterHarness(params?: {
 }
 
 describe("createChildAdapter", () => {
+  const originalServiceMarker = process.env.OPENCLAW_SERVICE_MARKER;
+
   beforeAll(async () => {
     ({ createChildAdapter } = await import("./child.js"));
   });
@@ -56,6 +58,11 @@ describe("createChildAdapter", () => {
   beforeEach(() => {
     spawnWithFallbackMock.mockClear();
     killProcessTreeMock.mockClear();
+    if (originalServiceMarker === undefined) {
+      delete process.env.OPENCLAW_SERVICE_MARKER;
+    } else {
+      process.env.OPENCLAW_SERVICE_MARKER = originalServiceMarker;
+    }
   });
 
   it("uses process-tree kill for default SIGKILL", async () => {
@@ -90,6 +97,19 @@ describe("createChildAdapter", () => {
     expect(killMock).toHaveBeenCalledWith("SIGTERM");
   });
 
+  it("disables detached mode in service-managed runtime", async () => {
+    process.env.OPENCLAW_SERVICE_MARKER = "openclaw";
+
+    await createAdapterHarness({ pid: 7777 });
+
+    const spawnArgs = spawnWithFallbackMock.mock.calls[0]?.[0] as {
+      options?: { detached?: boolean };
+      fallbacks?: Array<{ options?: { detached?: boolean } }>;
+    };
+    expect(spawnArgs.options?.detached).toBe(false);
+    expect(spawnArgs.fallbacks ?? []).toEqual([]);
+  });
+
   it("keeps inherited env when no override env is provided", async () => {
     await createAdapterHarness({
       pid: 3333,

src/process/supervisor/adapters/child.ts

@@ -21,6 +21,10 @@ function resolveCommand(command: string): string {
 
 export type ChildAdapter = SpawnProcessAdapter<NodeJS.Signals | null>;
 
+function isServiceManagedRuntime(): boolean {
+  return Boolean(process.env.OPENCLAW_SERVICE_MARKER?.trim());
+}
+
 export async function createChildAdapter(params: {
   argv: string[];
   cwd?: string;
@@ -34,11 +38,10 @@ export async function createChildAdapter(params: {
 
   const stdinMode = params.stdinMode ?? (params.input !== undefined ? "pipe-closed" : "inherit");
 
-  // On Windows, `detached: true` creates a new process group and can prevent
-  // stdout/stderr pipes from connecting when running under a Scheduled Task
-  // (headless, no console). Default to `detached: false` on Windows; on
-  // POSIX systems keep `detached: true` so the child survives parent exit.
-  const useDetached = process.platform !== "win32";
+  // In service-managed mode keep children attached so systemd/launchd can
+  // stop the full process tree reliably. Outside service mode preserve the
+  // existing POSIX detached behavior.
+  const useDetached = process.platform !== "win32" && !isServiceManagedRuntime();
 
   const options: SpawnOptions = {
     cwd: params.cwd,