From 167470e6381111001d73af6a6c10a6494fcc5afa Mon Sep 17 00:00:00 2001
From: Duane Johnson <djohnson@getcollc.com>
Date: Tue, 15 Nov 2011 22:03:18 -0600
Subject: [PATCH] Added a try/except block around readline so that
 disconnection does not yield a traceback.

---
 printcore.py | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/printcore.py b/printcore.py
index 8573cec..66fa57d 100755
--- a/printcore.py
+++ b/printcore.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 from serial import Serial
 from threading import Thread
+from select import error as SelectError
 import time
 import sys
 
@@ -76,7 +77,15 @@ class printcore():
         while(True):
             if(not self.printer or not self.printer.isOpen):
                 break
-            line=self.printer.readline()
+            try:
+                line=self.printer.readline()
+            except SelectError, e:
+                if 'Bad file descriptor' in e.args[1]:
+                    print "Can't read from printer (disconnected?)."
+                    break
+                else:
+                    raise
+
             if(len(line)>1):
                 self.log+=[line]
                 if self.recvcb is not None: