diff --git a/src/daemon/exec-file.ts b/src/daemon/exec-file.ts
new file mode 100644
index 00000000000..6067a160284
--- /dev/null
+++ b/src/daemon/exec-file.ts
@@ -0,0 +1,32 @@
+import { execFile, type ExecFileOptionsWithStringEncoding } from "node:child_process";
+
+export type ExecResult = { stdout: string; stderr: string; code: number };
+
+export async function execFileUtf8(
+  command: string,
+  args: string[],
+  options: Omit<ExecFileOptionsWithStringEncoding, "encoding"> = {},
+): Promise<ExecResult> {
+  return await new Promise<ExecResult>((resolve) => {
+    execFile(command, args, { ...options, encoding: "utf8" }, (error, stdout, stderr) => {
+      if (!error) {
+        resolve({
+          stdout: String(stdout ?? ""),
+          stderr: String(stderr ?? ""),
+          code: 0,
+        });
+        return;
+      }
+
+      const e = error as { code?: unknown; message?: unknown };
+      const stderrText = String(stderr ?? "");
+      resolve({
+        stdout: String(stdout ?? ""),
+        stderr:
+          stderrText ||
+          (typeof e.message === "string" ? e.message : typeof error === "string" ? error : ""),
+        code: typeof e.code === "number" ? e.code : 1,
+      });
+    });
+  });
+}
diff --git a/src/daemon/launchd.ts b/src/daemon/launchd.ts
index 7da2f78ebef..3d33af682dc 100644
--- a/src/daemon/launchd.ts
+++ b/src/daemon/launchd.ts
@@ -1,7 +1,5 @@
-import { execFile } from "node:child_process";
 import fs from "node:fs/promises";
 import path from "node:path";
-import { promisify } from "node:util";
 import type { GatewayServiceRuntime } from "./service-runtime.js";
 import {
   formatGatewayServiceDescription,
@@ -9,6 +7,7 @@ import {
   resolveGatewayLaunchAgentLabel,
   resolveLegacyGatewayLaunchAgentLabels,
 } from "./constants.js";
+import { execFileUtf8 } from "./exec-file.js";
 import {
   buildLaunchAgentPlist as buildLaunchAgentPlistImpl,
   readLaunchAgentProgramArgumentsFromFile,
@@ -17,8 +16,6 @@ import { formatLine, toPosixPath } from "./output.js";
 import { resolveGatewayStateDir, resolveHomeDir } from "./paths.js";
 import { parseKeyValueOutput } from "./runtime-parse.js";
 
-const execFileAsync = promisify(execFile);
-
 function resolveLaunchAgentLabel(args?: { env?: Record<string, string | undefined> }): string {
   const envLabel = args?.env?.OPENCLAW_LAUNCHD_LABEL?.trim();
   if (envLabel) {
@@ -98,30 +95,10 @@ export function buildLaunchAgentPlist({
 async function execLaunchctl(
   args: string[],
 ): Promise<{ stdout: string; stderr: string; code: number }> {
-  try {
-    const isWindows = process.platform === "win32";
-    const file = isWindows ? (process.env.ComSpec ?? "cmd.exe") : "launchctl";
-    const fileArgs = isWindows ? ["/d", "/s", "/c", "launchctl", ...args] : args;
-    const { stdout, stderr } = await execFileAsync(file, fileArgs, { encoding: "utf8" });
-    return {
-      stdout: String(stdout ?? ""),
-      stderr: String(stderr ?? ""),
-      code: 0,
-    };
-  } catch (error) {
-    const e = error as {
-      stdout?: unknown;
-      stderr?: unknown;
-      code?: unknown;
-      message?: unknown;
-    };
-    return {
-      stdout: typeof e.stdout === "string" ? e.stdout : "",
-      stderr:
-        typeof e.stderr === "string" ? e.stderr : typeof e.message === "string" ? e.message : "",
-      code: typeof e.code === "number" ? e.code : 1,
-    };
-  }
+  const isWindows = process.platform === "win32";
+  const file = isWindows ? (process.env.ComSpec ?? "cmd.exe") : "launchctl";
+  const fileArgs = isWindows ? ["/d", "/s", "/c", "launchctl", ...args] : args;
+  return await execFileUtf8(file, fileArgs, isWindows ? { windowsHide: true } : {});
 }
 
 function resolveGuiDomain(): string {
diff --git a/src/daemon/schtasks-exec.ts b/src/daemon/schtasks-exec.ts
index c9c2628b44b..e4344d3cd5d 100644
--- a/src/daemon/schtasks-exec.ts
+++ b/src/daemon/schtasks-exec.ts
@@ -1,33 +1,7 @@
-import { execFile } from "node:child_process";
-import { promisify } from "node:util";
-
-const execFileAsync = promisify(execFile);
+import { execFileUtf8 } from "./exec-file.js";
 
 export async function execSchtasks(
   args: string[],
 ): Promise<{ stdout: string; stderr: string; code: number }> {
-  try {
-    const { stdout, stderr } = await execFileAsync("schtasks", args, {
-      encoding: "utf8",
-      windowsHide: true,
-    });
-    return {
-      stdout: String(stdout ?? ""),
-      stderr: String(stderr ?? ""),
-      code: 0,
-    };
-  } catch (error) {
-    const e = error as {
-      stdout?: unknown;
-      stderr?: unknown;
-      code?: unknown;
-      message?: unknown;
-    };
-    return {
-      stdout: typeof e.stdout === "string" ? e.stdout : "",
-      stderr:
-        typeof e.stderr === "string" ? e.stderr : typeof e.message === "string" ? e.message : "",
-      code: typeof e.code === "number" ? e.code : 1,
-    };
-  }
+  return await execFileUtf8("schtasks", args, { windowsHide: true });
 }
diff --git a/src/daemon/systemd.ts b/src/daemon/systemd.ts
index e4d45368d9b..6ef8af5765f 100644
--- a/src/daemon/systemd.ts
+++ b/src/daemon/systemd.ts
@@ -1,13 +1,12 @@
-import { execFile } from "node:child_process";
 import fs from "node:fs/promises";
 import path from "node:path";
-import { promisify } from "node:util";
 import type { GatewayServiceRuntime } from "./service-runtime.js";
 import {
   formatGatewayServiceDescription,
   LEGACY_GATEWAY_SYSTEMD_SERVICE_NAMES,
   resolveGatewaySystemdServiceName,
 } from "./constants.js";
+import { execFileUtf8 } from "./exec-file.js";
 import { formatLine, toPosixPath } from "./output.js";
 import { resolveHomeDir } from "./paths.js";
 import { parseKeyValueOutput } from "./runtime-parse.js";
@@ -22,8 +21,6 @@ import {
   parseSystemdExecStart,
 } from "./systemd-unit.js";
 
-const execFileAsync = promisify(execFile);
-
 function resolveSystemdUnitPathForName(
   env: Record<string, string | undefined>,
   name: string,
@@ -142,29 +139,7 @@ export function parseSystemdShow(output: string): SystemdServiceInfo {
 async function execSystemctl(
   args: string[],
 ): Promise<{ stdout: string; stderr: string; code: number }> {
-  try {
-    const { stdout, stderr } = await execFileAsync("systemctl", args, {
-      encoding: "utf8",
-    });
-    return {
-      stdout: String(stdout ?? ""),
-      stderr: String(stderr ?? ""),
-      code: 0,
-    };
-  } catch (error) {
-    const e = error as {
-      stdout?: unknown;
-      stderr?: unknown;
-      code?: unknown;
-      message?: unknown;
-    };
-    return {
-      stdout: typeof e.stdout === "string" ? e.stdout : "",
-      stderr:
-        typeof e.stderr === "string" ? e.stderr : typeof e.message === "string" ? e.message : "",
-      code: typeof e.code === "number" ? e.code : 1,
-    };
-  }
+  return await execFileUtf8("systemctl", args);
 }
 
 export async function isSystemdUserServiceAvailable(): Promise<boolean> {