fixed all lint errors except ones which require refactoring of code

lib/appenders/file.js

@@ -1,25 +1,29 @@
+"use strict";
 var layouts = require('../layouts')
-  , path = require('path')
-  , fs = require('fs')
-  , streams = require('../streams')
-  , os = require('os')
-  , eol = os.EOL || '\n'
-  , openFiles = [];
+, path = require('path')
+, fs = require('fs')
+, streams = require('../streams')
+, os = require('os')
+, eol = os.EOL || '\n'
+, openFiles = [];
 
 //close open files on process exit.
 process.on('exit', function() {
-    openFiles.forEach(function (file) {
-        file.end();
-    });
+  openFiles.forEach(function (file) {
+    file.end();
+  });
 });
 
 /**
  * File Appender writing the logs to a text file. Supports rolling of logs by size.
  *
  * @param file file log messages will be written to
- * @param layout a function that takes a logevent and returns a string (defaults to basicLayout).
- * @param logSize - the maximum size (in bytes) for a log file, if not provided then logs won't be rotated.
- * @param numBackups - the number of log files to keep after logSize has been reached (default 5)
+ * @param layout a function that takes a logevent and returns a string 
+ *   (defaults to basicLayout).
+ * @param logSize - the maximum size (in bytes) for a log file, 
+ *   if not provided then logs won't be rotated.
+ * @param numBackups - the number of log files to keep after logSize 
+ *   has been reached (default 5)
  */
 function fileAppender (file, layout, logSize, numBackups) {
   var bytesWritten = 0;
@@ -38,7 +42,12 @@ function fileAppender (file, layout, logSize, numBackups) {
         numFiles
       );
     } else {
-      stream = fs.createWriteStream(file, { encoding: "utf8", mode: 0644, flags: 'a' });
+      stream = fs.createWriteStream(
+        file, 
+        { encoding: "utf8", 
+          mode: parseInt('0644', 8), 
+          flags: 'a' }
+      );
     }
     stream.on("error", function (err) {
       console.error("log4js.fileAppender - Writing to file %s, error happened ", file, err);