def test_lazy_unmount(self):
src_file = pjoin(self.source, 'file')
bind_file = pjoin(self.target, 'file')
touch(src_file)
with open(src_file, 'w') as f:
f.write('foo')
try:
with Namespace(user=True, mount=True):
mount(self.source, self.target, None, MS_BIND)
assert os.path.exists(bind_file)
with open(bind_file) as f:
# can't unmount the target due to the open file
with pytest.raises(OSError) as cm:
umount(self.target)
assert cm.value.errno == errno.EBUSY
# lazily unmount instead
umount(self.target, MNT_DETACH)
# confirm the file doesn't exist in the bind mount anymore
assert not os.path.exists(bind_file)
# but the file is still accessible to the process
assert f.read() == 'foo'
# trying to reopen causes IOError
with pytest.raises(IOError) as cm:
f = open(bind_file)
assert cm.value.errno == errno.ENOENT
except PermissionError:
pytest.skip('No permission to use user and mount namespace')
def test_uts_namespace(self):
try:
with Namespace(user=True, uts=True, hostname='host') as ns:
ns_hostname, _, ns_domainname = socket.getfqdn().partition('.')
assert ns_hostname == 'host'
assert ns_domainname == ''
except PermissionError:
pytest.skip('No permission to use user and uts namespace')
def test_bind_mount(self):
src_file = pjoin(self.source, 'file')
bind_file = pjoin(self.target, 'file')
touch(src_file)
try:
with Namespace(user=True, mount=True):
assert not os.path.exists(bind_file)
mount(self.source, self.target, None, MS_BIND)
assert os.path.exists(bind_file)
umount(self.target)
assert not os.path.exists(bind_file)
except PermissionError:
pytest.skip('No permission to use user and mount namespace')
def test_user_namespace(self):
try:
with Namespace(user=True) as ns:
assert os.getuid() == 0
except PermissionError:
pytest.skip('No permission to use user namespace')