fix

room.coffee

@@ -12,14 +12,17 @@ log = bunyan.createLogger name: "mycard-room"
 #获取可用内存
 get_memory_usage = ()->
   prc_free = spawnSync("free", [])
-  lines = prc_free.stdout.toString().split(/\n/g)
-  line = lines[1].split(/\s+/)
-  total = parseInt(line[1], 10)
-  free = parseInt(line[3], 10)
-  buffers = parseInt(line[5], 10)
-  cached = parseInt(line[6], 10)
-  actualFree = free + buffers + cached
-  percentUsed = parseFloat(((1 - (actualFree / total)) * 100).toFixed(2))
+  if (prc_free.stdout)
+    lines = prc_free.stdout.toString().split(/\n/g)
+    line = lines[1].split(/\s+/)
+    total = parseInt(line[1], 10)
+    free = parseInt(line[3], 10)
+    buffers = parseInt(line[5], 10)
+    cached = parseInt(line[6], 10)
+    actualFree = free + buffers + cached
+    percentUsed = parseFloat(((1 - (actualFree / total)) * 100).toFixed(2))
+  else
+    percentUsed = 0
   return percentUsed
 
 class Room

room.js

@@ -25,14 +25,18 @@
   get_memory_usage = function() {
     var actualFree, buffers, cached, free, line, lines, percentUsed, prc_free, total;
     prc_free = spawnSync("free", []);
-    lines = prc_free.stdout.toString().split(/\n/g);
-    line = lines[1].split(/\s+/);
-    total = parseInt(line[1], 10);
-    free = parseInt(line[3], 10);
-    buffers = parseInt(line[5], 10);
-    cached = parseInt(line[6], 10);
-    actualFree = free + buffers + cached;
-    percentUsed = parseFloat(((1 - (actualFree / total)) * 100).toFixed(2));
+    if (prc_free.stdout) {
+      lines = prc_free.stdout.toString().split(/\n/g);
+      line = lines[1].split(/\s+/);
+      total = parseInt(line[1], 10);
+      free = parseInt(line[3], 10);
+      buffers = parseInt(line[5], 10);
+      cached = parseInt(line[6], 10);
+      actualFree = free + buffers + cached;
+      percentUsed = parseFloat(((1 - (actualFree / total)) * 100).toFixed(2));
+    } else {
+      percentUsed = 0;
+    }
     return percentUsed;
   };