Issue #10806, issue #9905: Fix subprocess pipes when some of the standard
file descriptors (0, 1, 2) are closed in the parent process. Initial
patch by Ross Lagerwall.
diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
index 8b2699d..7b9e2b4 100644
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -903,6 +903,58 @@
self.assertStderrEqual(stderr, b'')
self.assertEqual(p.wait(), -signal.SIGTERM)
+ def check_close_std_fds(self, fds):
+ # Issue #9905: test that subprocess pipes still work properly with
+ # some standard fds closed
+ stdin = 0
+ newfds = []
+ for a in fds:
+ b = os.dup(a)
+ newfds.append(b)
+ if a == 0:
+ stdin = b
+ try:
+ for fd in fds:
+ os.close(fd)
+ out, err = subprocess.Popen([sys.executable, "-c",
+ 'import sys;'
+ 'sys.stdout.write("apple");'
+ 'sys.stdout.flush();'
+ 'sys.stderr.write("orange")'],
+ stdin=stdin,
+ stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE).communicate()
+ err = support.strip_python_stderr(err)
+ self.assertEqual((out, err), (b'apple', b'orange'))
+ finally:
+ for b, a in zip(newfds, fds):
+ os.dup2(b, a)
+ for b in newfds:
+ os.close(b)
+
+ def test_close_fd_0(self):
+ self.check_close_std_fds([0])
+
+ def test_close_fd_1(self):
+ self.check_close_std_fds([1])
+
+ def test_close_fd_2(self):
+ self.check_close_std_fds([2])
+
+ def test_close_fds_0_1(self):
+ self.check_close_std_fds([0, 1])
+
+ def test_close_fds_0_2(self):
+ self.check_close_std_fds([0, 2])
+
+ def test_close_fds_1_2(self):
+ self.check_close_std_fds([1, 2])
+
+ def test_close_fds_0_1_2(self):
+ # Issue #10806: test that subprocess pipes still work properly with
+ # all standard fds closed.
+ self.check_close_std_fds([0, 1, 2])
+
def test_surrogates_error_message(self):
def prepare():
raise ValueError("surrogate:\uDCff")