opt: use ksu.spawn for long script

module/webui/scripts/assets/kernelsu.js

@@ -41,6 +41,27 @@ export function exec(command, options = {}) {
     });
 }
 
+/**
+ * Standard I/O stream for a child process.
+ * @class
+ */
+class Stdio {
+    constructor() {
+        this.listeners = {};
+    }
+    on(event, listener) {
+        if (!this.listeners[event]) {
+            this.listeners[event] = [];
+        }
+        this.listeners[event].push(listener);
+    }
+    emit(event, ...args) {
+        if (this.listeners[event]) {
+            this.listeners[event].forEach(listener => listener(...args));
+        }
+    }
+}
+
 /**
  * Spawn shell process with ksu.spawn
  * @param {string} command - The command to execute
@@ -71,20 +92,6 @@ export function spawn(command, args = [], options = {}) {
             }
         }
     };
-    function Stdio() {
-        this.listeners = {};
-    }
-    Stdio.prototype.on = function(event, listener) {
-        if (!this.listeners[event]) {
-            this.listeners[event] = [];
-        }
-        this.listeners[event].push(listener);
-    };
-    Stdio.prototype.emit = function(event, ...args) {
-        if (this.listeners[event]) {
-            this.listeners[event].forEach(listener => listener(...args));
-        }
-    };
     const callbackName = getUniqueCallbackName("spawn");
     window[callbackName] = child;
     child.on("exit", () => delete window[callbackName]);