Fix spawned wmic processes not exiting when using pidusage in packaged apps (#186)

Author: EthyMoney

CHANGELOG.md

@@ -1,3 +1,7 @@
+### 4.0.1
+
+- fix spawned wmic processes not exiting after wmic/gwmi detection in packaged apps, leading to infinite build up of "WMI Commandline Utility" processes and system instability
+
 ### 4.0.0
 
 - fix wmic removed on Windows 11 and add gwmi support

lib/stats.js

@@ -61,12 +61,17 @@ function get (pids, options, callback) {
   }
   if (platform === 'win') {
     // TODO: use https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/where to avoid try/catch
+    let child;
     try {
-      spawn('wmic', function (err) {
+      child = spawn('wmic', function (err) {
         if (err) throw new Error(err)
       })
     } catch (err) {
       fn = requireMap.gwmi()
+    } finally {
+      if (child) {
+        child.kill()
+      }
     }
   }