From c249745ca37f996ef7de51d1be2997e6734d649b Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Wed, 8 Jun 2011 17:32:56 -0700
Subject: [PATCH] Test noblocking locks.

---
 pym/portage/tests/locks/test_lock_nonblock.py | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 pym/portage/tests/locks/test_lock_nonblock.py

diff --git a/pym/portage/tests/locks/test_lock_nonblock.py b/pym/portage/tests/locks/test_lock_nonblock.py
new file mode 100644
index 000000000..d5748ad62
--- /dev/null
+++ b/pym/portage/tests/locks/test_lock_nonblock.py
@@ -0,0 +1,46 @@
+# Copyright 2011 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+import shutil
+import tempfile
+import traceback
+
+import portage
+from portage import os
+from portage.tests import TestCase
+
+class LockNonblockTestCase(TestCase):
+
+	def testLockNonblock(self):
+		tempdir = tempfile.mkdtemp()
+		try:
+			path = os.path.join(tempdir, 'lock_me')
+			lock1 = portage.locks.lockfile(path)
+			pid = os.fork()
+			if pid == 0:
+				portage.process._setup_pipes({0:0, 1:1, 2:2})
+				rval = 2
+				try:
+					try:
+						lock2 = portage.locks.lockfile(path, flags=os.O_NONBLOCK)
+					except portage.exception.TryAgain:
+						rval = os.EX_OK
+					else:
+						rval = 1
+						portage.locks.unlockfile(lock2)
+				except SystemExit:
+					raise
+				except:
+					traceback.print_exc()
+				finally:
+					os._exit(rval)
+
+			self.assertEqual(pid > 0, True)
+			pid, status = os.waitpid(pid, 0)
+			self.assertEqual(os.WIFEXITED(status), True)
+			self.assertEqual(os.WEXITSTATUS(status), os.EX_OK)
+
+			portage.locks.unlockfile(lock1)
+		finally:
+			shutil.rmtree(tempdir)
+
-- 
2.26.2