def _lock_pod_dir_for_exec(pod_dir_path):
"""Lock pod directory.
NOTE: This lock is not released/close on exec.
"""
pod_dir_lock = locks.FileLock(pod_dir_path, close_on_exec=False)
pod_dir_lock.acquire_exclusive()
def test_change_lock_type(self):
lock_path = self.test_dir_path / 'lock'
lock_path.touch()
lock = locks.FileLock(lock_path)
try:
lock.acquire_shared()
self.assertTrue(self.check_shared(lock_path))
self.assertFalse(self.check_exclusive(lock_path))
lock.acquire_exclusive()
self.assertFalse(self.check_shared(lock_path))
self.assertFalse(self.check_exclusive(lock_path))
lock.acquire_shared()
self.assertTrue(self.check_shared(lock_path))
self.assertFalse(self.check_exclusive(lock_path))
with self.using_shared(lock_path):
with self.assertRaises(locks.NotLocked):
lock.acquire_exclusive()
finally:
lock.release()
lock.close()
def test_release_after_close(self):
lock_path = self.test_dir_path / 'lock'
lock_path.touch()
lock = locks.FileLock(lock_path)
lock.close()
with self.assertRaisesRegex(AssertionError, r'expect non-None value'):
lock.release()
def test_remove_while_locked(self):
lock_path = self.test_dir_path / 'lock'
lock_path.touch()
lock = locks.FileLock(lock_path)
try:
lock.acquire_shared()
try:
lock_path.unlink()
self.assertFalse(lock_path.exists())
finally:
lock.release()
finally:
lock.close()
self.assertFalse(lock_path.exists())
def cmd_exec(xar_name, xar_args):
# Don't need root privilege here.
with locks.acquiring_shared(_get_xars_repo_path()):
xar_dir_path = ASSERT.predicate(_get_xar_dir_path(xar_name),
Path.is_dir)
exec_abspath = ASSERT.predicate(_get_exec_path(xar_dir_path),
Path.exists).resolve()
lock = locks.FileLock(
_get_ref_path(xar_dir_path, _get_image_id(exec_abspath)),
close_on_exec=False,
)
lock.acquire_shared()
# TODO: Or should argv[0] be exec_abspath.name?
argv = [xar_name]
argv.extend(xar_args)
LOG.debug('exec: path=%s, argv=%s', exec_abspath, argv)
os.execv(str(exec_abspath), argv)
def do_test_lock(self, lock_path):
lock = locks.FileLock(lock_path)
try:
self.assertTrue(self.check_shared(lock_path))
self.assertTrue(self.check_exclusive(lock_path))
lock.acquire_shared()
try:
self.assertTrue(self.check_shared(lock_path))
self.assertFalse(self.check_exclusive(lock_path))
finally:
lock.release()
self.assertTrue(self.check_shared(lock_path))
self.assertTrue(self.check_exclusive(lock_path))
lock.acquire_exclusive()
try:
self.assertFalse(self.check_shared(lock_path))
self.assertFalse(self.check_exclusive(lock_path))
finally:
lock.release()
self.assertTrue(self.check_shared(lock_path))
self.assertTrue(self.check_exclusive(lock_path))
with self.using_shared(lock_path):
lock.acquire_shared()
lock.release()
with self.assertRaises(locks.NotLocked):
lock.acquire_exclusive()
self.assertTrue(self.check_shared(lock_path))
self.assertFalse(self.check_exclusive(lock_path))
with self.using_exclusive(lock_path):
with self.assertRaises(locks.NotLocked):
lock.acquire_shared()
with self.assertRaises(locks.NotLocked):
lock.acquire_exclusive()
self.assertFalse(self.check_shared(lock_path))
self.assertFalse(self.check_exclusive(lock_path))
finally:
lock.close()
def _using_tmp():
tmp_dir_path = _get_tmp_path()
tmp_path = None
tmp_lock = None
with locks.acquiring_exclusive(tmp_dir_path):
try:
tmp_path = Path(tempfile.mkdtemp(dir=tmp_dir_path))
tmp_lock = locks.FileLock(tmp_path)
tmp_lock.acquire_exclusive()
except:
if tmp_path:
g1.files.remove(tmp_path)
if tmp_lock:
tmp_lock.release()
tmp_lock.close()
raise
try:
yield tmp_path
finally:
g1.files.remove(tmp_path)
tmp_lock.release()
tmp_lock.close()
def test_not_close_on_exec(self):
@contextlib.contextmanager
def using_dummy_proc():
with subprocess.Popen(['cat'], close_fds=False) as proc:
try:
proc.wait(0.01) # Wait for ``cat`` to start up.
except subprocess.TimeoutExpired:
pass
try:
yield
finally:
proc.kill()
proc.wait()
lock_path = self.test_dir_path / 'lock'
lock_path.touch()
lock = locks.FileLock(lock_path, close_on_exec=False)
try:
self.assertTrue(self.check_shared(lock_path))
self.assertTrue(self.check_exclusive(lock_path))
lock.acquire_shared()
self.assertTrue(self.check_shared(lock_path))
self.assertFalse(self.check_exclusive(lock_path))
with using_dummy_proc():
lock.close()
self.assertTrue(self.check_shared(lock_path))
self.assertFalse(self.check_exclusive(lock_path))
self.assertTrue(self.check_shared(lock_path))
self.assertTrue(self.check_exclusive(lock_path))
finally:
lock.close()
def test_lock_not_exist(self):
lock_path = self.test_dir_path / 'lock'
self.assertFalse(lock_path.exists())
with self.assertRaisesRegex(FileNotFoundError, str(lock_path)):
locks.FileLock(lock_path)
def test_release_without_acquire(self):
lock_path = self.test_dir_path / 'lock'
lock_path.touch()
lock = locks.FileLock(lock_path)
lock.release()
lock.close()
