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import os
import tempfile
import unittest
from ..xattr import is_enabled, getxattr, setxattr, listxattr, buffer
from . import BaseTestCase
@unittest.skipUnless(is_enabled(), 'xattr not enabled on filesystem')
class XattrTestCase(BaseTestCase):
def setUp(self):
self.tmpfile = tempfile.NamedTemporaryFile()
self.symlink = os.path.join(os.path.dirname(self.tmpfile.name), 'symlink')
os.symlink(self.tmpfile.name, self.symlink)
def tearDown(self):
os.unlink(self.symlink)
def assert_equal_se(self, is_x, want_x):
# check 2 xattr lists for equality, but ignore security.selinux attr
is_x = set(is_x) - {'security.selinux'}
want_x = set(want_x)
self.assert_equal(is_x, want_x)
def test(self):
self.assert_equal_se(listxattr(self.tmpfile.name), [])
self.assert_equal_se(listxattr(self.tmpfile.fileno()), [])
self.assert_equal_se(listxattr(self.symlink), [])
setxattr(self.tmpfile.name, 'user.foo', b'bar')
setxattr(self.tmpfile.fileno(), 'user.bar', b'foo')
setxattr(self.tmpfile.name, 'user.empty', None)
self.assert_equal_se(listxattr(self.tmpfile.name), ['user.foo', 'user.bar', 'user.empty'])
self.assert_equal_se(listxattr(self.tmpfile.fileno()), ['user.foo', 'user.bar', 'user.empty'])
self.assert_equal_se(listxattr(self.symlink), ['user.foo', 'user.bar', 'user.empty'])
self.assert_equal_se(listxattr(self.symlink, follow_symlinks=False), [])
self.assert_equal(getxattr(self.tmpfile.name, 'user.foo'), b'bar')
self.assert_equal(getxattr(self.tmpfile.fileno(), 'user.foo'), b'bar')
self.assert_equal(getxattr(self.symlink, 'user.foo'), b'bar')
self.assert_equal(getxattr(self.tmpfile.name, 'user.empty'), None)
def test_listxattr_buffer_growth(self):
# make it work even with ext4, which imposes rather low limits
buffer.resize(size=64, init=True)
# xattr raw key list will be size 9 * (10 + 1), which is > 64
keys = ['user.attr%d' % i for i in range(9)]
for key in keys:
setxattr(self.tmpfile.name, key, b'x')
got_keys = listxattr(self.tmpfile.name)
self.assert_equal_se(got_keys, keys)
self.assert_equal(len(buffer), 128)
def test_getxattr_buffer_growth(self):
# make it work even with ext4, which imposes rather low limits
buffer.resize(size=64, init=True)
value = b'x' * 126
setxattr(self.tmpfile.name, 'user.big', value)
got_value = getxattr(self.tmpfile.name, 'user.big')
self.assert_equal(value, got_value)
self.assert_equal(len(buffer), 128)
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