--- esk.py-	2016-09-15 23:00:00.000000000 +0900
+++ esk.py	2016-09-16 00:00:00.000000000 +0900
@@ -666,6 +666,13 @@ def err_exit(msg, rcode=1):
 	print('Err {}'.format(msg))
 	sys.exit(rcode)
 
+def load_src(fn):
+	if fn == '-':
+		return sys.stdin.read()
+	with open(fn, 'r') as f:
+		s = f.read()
+	return s
+
 if __name__ == "__main__":
 	rcode = 0
 	if len(sys.argv) <= 1:
@@ -677,8 +684,7 @@ if __name__ == "__main__":
 			if opt in argv:
 				argv.remove(opt)
 				verb = i + 1
-		with open(argv[1], 'r') as f:
-			s = f.read()
+		s = load_src( argv[1] )
 		lst = es_split(s)
 		if verb >= 3:
 			show_yaml(lst, 'lst')