fsSize() optimized parsing if there are errors

lib/filesystem.js

@@ -54,6 +54,22 @@ function fsSize(callback) {
     return (linuxTmpFileSystems.includes(fs.toLowerCase()));
   }
 
+  function filterLines(stdout) {
+    let lines = stdout.toString().split('\n');
+    if (stdout.toString().toLowerCase().indexOf('filesystem')) {
+      let removeLines = 0;
+      for (let i = 0; i < lines.length; i++) {
+        if (line[i] && lines[i].toLowerCase().startsWith('filesystem')) {
+          removeLines = i;
+        }
+      }
+      for (let i = 0; i < removeLines; i++) {
+        lines.shift();
+      }
+    }
+    return lines;
+  }
+
   function parseDf(lines) {
     let data = [];
     lines.forEach(function (line) {
@@ -104,10 +120,9 @@ function fsSize(callback) {
         if (_linux) { cmd = 'df -lkPTx squashfs'; } // cmd = 'df -lkPTx squashfs | grep  -E "^/|^.\\:"';
         if (_freebsd || _openbsd || _netbsd) { cmd = 'df -lkPT'; }
         exec(cmd, { maxBuffer: 1024 * 1024 }, function (error, stdout) {
-          if (!error) {
-            let lines = stdout.toString().split('\n');
-            if (lines && lines[0] && lines[0].toLowerCase().startsWith('filesystem')) { lines.shift(); }
+          let lines = filterLines(stdout);
           data = parseDf(lines);
+          if (!error || data.length) {
             if (callback) {
               callback(data);
             }
@@ -115,8 +130,7 @@ function fsSize(callback) {
           } else {
             exec('df -kPT', { maxBuffer: 1024 * 1024 }, function (error, stdout) {
               if (!error) {
-                let lines = stdout.toString().split('\n');
-                if (lines && lines[0] && lines[0].toLowerCase().startsWith('filesystem')) { lines.shift(); }
+                let lines = filterLines(stdout);
                 data = parseDf(lines);
               }
               if (callback) {

lib/index.d.ts

@@ -988,3 +988,6 @@ export function getDynamicData(srv?: string, iface?: string, cb?: (data: any) =>
 export function getAllData(srv?: string, iface?: string, cb?: (data: any) => any): Promise<any>;
 export function get(valuesObject: any, cb?: (data: any) => any): Promise<any>;
 export function observe(valuesObject: any, interval: number, cb?: (data: any) => any): number;
+
+export function powerShellStart(): void;
+export function powerShellRelease(): void;

lib/util.js

@@ -396,6 +396,7 @@ function powerShellProceedResults(data) {
 }
 
 function powerShellStart() {
+  if (!_psChild) {
     _psChild = spawn('powershell.exe', ['-NoLogo', '-InputFormat', 'Text', '-NoExit', '-Command', '-'], {
       stdio: 'pipe',
       windowsHide: true,
@@ -422,16 +423,20 @@ function powerShellStart() {
         _psChild.kill();
       });
     }
+  }
 }
 
 function powerShellRelease() {
   try {
+    if (_psChild) {
       _psChild.stdin.write('exit' + os.EOL);
       _psChild.stdin.end();
       _psPersistent = false;
+    }
   } catch (e) {
     _psChild.kill();
   }
+  _psChild = null;
 }
 
 function powerShell(cmd) {