now now exit if display daemin dies

client-barcode/freitagskasse.py

@@ -37,7 +37,6 @@ def print_display(s):
 	global display_fifo
 	if not display_fifo:
 		try:
-			#display_fifo = open('/tmp/display', 'w')
 			fd = os.open( "/tmp/display", os.O_WRONLY)
 			display_fifo = os.fdopen(fd,"w")
 		except OSError:
@@ -48,8 +47,13 @@ def print_display(s):
 			display_fifo = None
 			pass
 			return
+	try:
 		display_fifo.write(s)
 		display_fifo.flush()
+	except IOError:
+		display_fifo = None
+		pass
+		return
 
 
 def clear():