asyncio, tulip issue 209: Fix subprocess for close_fds=False on Python 3.3

Mark the write end of the stdin pipe as non-inheritable.

1 files changed, 21 insertions, 0 deletions

diff --git a/Lib/test/test_asyncio/test_subprocess.py b/Lib/test/test_asyncio/test_subprocess.py
index 9060b9d..5c0a2c8 100644
--- a/Lib/test/test_asyncio/test_subprocess.py
+++ b/Lib/test/test_asyncio/test_subprocess.py
@@ -198,6 +198,27 @@ class SubprocessMixin:
         self.assertTrue(transport.pause_reading.called)
         self.assertTrue(transport.resume_reading.called)
 
+    def test_stdin_not_inheritable(self):
+        # Tulip issue #209: stdin must not be inheritable, otherwise
+        # the Process.communicate() hangs
+        @asyncio.coroutine
+        def len_message(message):
+            code = 'import sys; data = sys.stdin.read(); print(len(data))'
+            proc = yield from asyncio.create_subprocess_exec(
+                                          sys.executable, '-c', code,
+                                          stdin=asyncio.subprocess.PIPE,
+                                          stdout=asyncio.subprocess.PIPE,
+                                          stderr=asyncio.subprocess.PIPE,
+                                          close_fds=False,
+                                          loop=self.loop)
+            stdout, stderr = yield from proc.communicate(message)
+            exitcode = yield from proc.wait()
+            return (stdout, exitcode)
+
+        output, exitcode = self.loop.run_until_complete(len_message(b'abc'))
+        self.assertEqual(output.rstrip(), b'3')
+        self.assertEqual(exitcode, 0)
+
 
 if sys.platform != 'win32':
     # Unix