From 20f4b447f5cafcfebbc785cba1a7f3b363e794af Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@haypocalc.com>
Date: Tue, 25 May 2010 21:32:42 +0000
Subject: [PATCH] Merged revisions 81533 via svnmerge from
 svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r81533 | victor.stinner | 2010-05-25 23:12:34 +0200 (mar., 25 mai 2010) | 3 lines

  Issue #4769: Fix main() function of the base64 module, use sys.stdin.buffer and
  sys.stdout.buffer (instead of sys.stdin and sys.stdout) to use the bytes API
........
---
 Lib/base64.py           |  4 ++--
 Lib/test/test_base64.py | 34 ++++++++++++++++++++++++++++++++++
 Misc/NEWS               |  4 ++++
 3 files changed, 40 insertions(+), 2 deletions(-)

diff --git a/Lib/base64.py b/Lib/base64.py
index e7081364698..b31c410aaa0 100755
--- a/Lib/base64.py
+++ b/Lib/base64.py
@@ -383,9 +383,9 @@ def main():
         if o == '-u': func = decode
         if o == '-t': test(); return
     if args and args[0] != '-':
-        func(open(args[0], 'rb'), sys.stdout)
+        func(open(args[0], 'rb'), sys.stdout.buffer)
     else:
-        func(sys.stdin, sys.stdout)
+        func(sys.stdin.buffer, sys.stdout.buffer)
 
 
 def test():
diff --git a/Lib/test/test_base64.py b/Lib/test/test_base64.py
index fadee6df678..7ff0db5cd04 100644
--- a/Lib/test/test_base64.py
+++ b/Lib/test/test_base64.py
@@ -2,6 +2,8 @@ import unittest
 from test import support
 import base64
 import binascii
+import sys
+import subprocess
 
 
 
@@ -207,6 +209,38 @@ class BaseXYTestCase(unittest.TestCase):
         self.assertTrue(issubclass(binascii.Error, ValueError))
 
 
+
+class TestMain(unittest.TestCase):
+    def get_output(self, *args, **options):
+        args = (sys.executable, '-m', 'base64') + args
+        return subprocess.check_output(args, **options)
+
+    def test_encode_decode(self):
+        output = self.get_output('-t')
+        self.assertSequenceEqual(output.splitlines(), (
+            b"b'Aladdin:open sesame'",
+            br"b'QWxhZGRpbjpvcGVuIHNlc2FtZQ==\n'",
+            b"b'Aladdin:open sesame'",
+        ))
+
+    def test_encode_file(self):
+        with open(support.TESTFN, 'wb') as fp:
+            fp.write(b'a\xffb\n')
+
+        output = self.get_output('-e', support.TESTFN)
+        self.assertEquals(output.rstrip(), b'Yf9iCg==')
+
+        with open(support.TESTFN, 'rb') as fp:
+            output = self.get_output('-e', stdin=fp)
+        self.assertEquals(output.rstrip(), b'Yf9iCg==')
+
+    def test_decode(self):
+        with open(support.TESTFN, 'wb') as fp:
+            fp.write(b'Yf9iCg==')
+        output = self.get_output('-d', support.TESTFN)
+        self.assertEquals(output, b'a\xffb\n')
+
+
 
 def test_main():
     support.run_unittest(__name__)
diff --git a/Misc/NEWS b/Misc/NEWS
index 2b5b7919a78..7e1769d7866 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -54,6 +54,10 @@ C-API
 Library
 -------
 
+- Issue #4769: Fix main() function of the base64 module, use sys.stdin.buffer
+  and sys.stdout.buffer (instead of sys.stdin and sys.stdout) to use the bytes
+  API
+
 - Issue #6662: Fix parsing of malformatted charref (&#bad;), patch written by
   Fredrik Håård