Fix issue when using useSudo on windows/osx

index.js

@@ -1,18 +1,20 @@
 /**
  * @typedef {Object} WifiNetwork
- * @property {string} ssid - SSID des WLAN-Netzwerks
+ * @property {string} ssid - SSID of the wifi
- * @property {string} mac - MAC-Adresse des WLAN-Netzwerks
+ * @property {string} mac - MAC-Address of the wifi
- * @property {number} channel - Kanal des WLAN-Netzwerks
+ * @property {number} channel - Channel of the wifi
- * @property {number} rssi - Signalstärke des WLAN-Netzwerks (RSSI)
+ * @property {number} rssi - Signalstrength of Wifi-Network (RSSI)
+ * @property {boolean} encrypted - Encrypted
  */
 
 
 /**
  * node-wifi-scanner
- * Created by kc on 04.04.16.
+ * Created by kc on 04.04.16. - Forked and updated by Tobias Hopp 27.03.2024
  */
 
-const exec    = require('child_process').exec;
+const {exec, spawn}    = require('child_process');
+
 const async   = require('async');
 const _       = require('lodash');
 // The tools
@@ -70,18 +72,42 @@ function initTools(callback) {
  * @param {boolean} useSudo - Use sudo for access?
  */
 function scanNetworks(callback, useSudo) {
-  exec((useSudo ? "sudo ":"") + scanner.cmdLine, function (err, stdout) {
+  const cmd = scanner.cmdLine.split(" ");
+  let args = cmd.slice(1);
+  if(useSudo)
+    args.unshift(cmd[0]);
+  const child = spawn(useSudo ? "sudo" : cmd[0], args, { stdio: ['ignore', 'pipe', 'pipe'], detached: true });
+
+  child.on("error", (err) => callback(err, null) );
+
+  let stdoutData = '';
+  child.stdout.on('data', (data) => {
+    stdoutData += data;
+  });
+
+  child.on('close', (code) => {
+    if (code === 0) {
+      // Prozess erfolgreich beendet, Ausgabe verarbeiten
+      scanner.parseOutput(stdoutData, callback);
+    } else {
+      // Prozess mit Fehler beendet
+      callback(new Error(`Exited with code ${code}`), null);
+    }
+  });
+
+  /*exec((useSudo ? "sudo ":"") + scanner.cmdLine, { shell: true }, function (err, stdout) {
     if (err) {
       callback(err, null);
       return;
     }
     scanner.parseOutput(stdout, callback);
-  });
+  });*/
+
 }
 
 module.exports = {
   /**
- * Funktion zum Scannen von WLAN-Netzwerken
+ * Scan for wifi networks
  * @param {boolean} useSudo? - Defaults to false | Should sudo be used to get the output?
  * @return {Promise<WifiNetwork[]|null>} WiFinetwork Array or null
  * @rejects Returns error on reject
@@ -97,8 +123,10 @@ module.exports = {
 	scanNetworks((err, result) => {
         	if(err)
                 	return reject(err);
+		if(!result)
+			result = [];
         	resolve(result);
-        }, useSudo);
+        }, useSudo && scanner == iwlist);
 
       });
       return;
@@ -106,8 +134,10 @@ module.exports = {
     scanNetworks((err, result) => {
 	if(err)
 		return reject(err);
+	if(!result)
+		result = [];
 	resolve(result);
-	}, useSudo);
+	}, useSudo && scanner == iwlist);
     } );
   }
 };