From f64b77a66cffaa68611b5bd2c26de2dace6cef72 Mon Sep 17 00:00:00 2001
From: Petr Balashov <pbca26@gmail.com>
Date: Thu, 23 Feb 2017 15:00:26 +0100
Subject: [PATCH] switched fs.exists with fs.access in shepherd.js

---
 routes/shepherd.js | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/routes/shepherd.js b/routes/shepherd.js
index 9fd3569..dc3cab5 100644
--- a/routes/shepherd.js
+++ b/routes/shepherd.js
@@ -479,15 +479,17 @@ shepherd.readDebugLog = function(fileLocation, lastNLines) {
   return new Promise(
     function(resolve, reject) {
       if (lastNLines) {
-        if (fs.existsSync(fileLocation)) {
-          console.log('reading ' + fileLocation);
-
-          readLastLines
-            .read(fileLocation, lastNLines)
-            .then((lines) => resolve(lines));
-        } else {
-          reject('file ' + fileLocation + ' doesn\'t exist!');
-        }
+        fs.access(fileLocation, fs.constants.R_OK, function(err) {
+		      if (err) {
+	          console.log('error reading ' + fileLocation);
+		        reject('readDebugLog error: ' + err);
+		      } else {
+          	console.log('reading ' + fileLocation);		      	
+	          readLastLines
+	            .read(fileLocation, lastNLines)
+	            .then((lines) => resolve(lines));
+	        }
+        });
       } else {
         reject('readDebugLog error: lastNLines param is not provided!');
       }