fix

room.coffee

@@ -12,6 +12,7 @@ log = bunyan.createLogger name: "mycard-room"
 #获取可用内存
 get_memory_usage = ()->
   prc_free = spawnSync("free", [])
+  if (prc_free.stdout)
     lines = prc_free.stdout.toString().split(/\n/g)
     line = lines[1].split(/\s+/)
     total = parseInt(line[1], 10)
@@ -20,6 +21,8 @@ get_memory_usage = ()->
     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

@@ -25,6 +25,7 @@
   get_memory_usage = function() {
     var actualFree, buffers, cached, free, line, lines, percentUsed, prc_free, total;
     prc_free = spawnSync("free", []);
+    if (prc_free.stdout) {
       lines = prc_free.stdout.toString().split(/\n/g);
       line = lines[1].split(/\s+/);
       total = parseInt(line[1], 10);
@@ -33,6 +34,9 @@
       cached = parseInt(line[6], 10);
       actualFree = free + buffers + cached;
       percentUsed = parseFloat(((1 - (actualFree / total)) * 100).toFixed(2));
+    } else {
+      percentUsed = 0;
+    }
     return percentUsed;
   };