test_posix.py 文件源码

def test_lchflags_symlink(self):
        testfn_st = os.stat(test_support.TESTFN)

        self.assertTrue(hasattr(testfn_st, 'st_flags'))

        os.symlink(test_support.TESTFN, _DUMMY_SYMLINK)
        self.teardown_files.append(_DUMMY_SYMLINK)
        dummy_symlink_st = os.lstat(_DUMMY_SYMLINK)

        # ZFS returns EOPNOTSUPP when attempting to set flag UF_IMMUTABLE.
        try:
            posix.lchflags(_DUMMY_SYMLINK,
                           dummy_symlink_st.st_flags | stat.UF_IMMUTABLE)
        except OSError as err:
            if err.errno != errno.EOPNOTSUPP:
                raise
            msg = 'chflag UF_IMMUTABLE not supported by underlying fs'
            self.skipTest(msg)

        try:
            new_testfn_st = os.stat(test_support.TESTFN)
            new_dummy_symlink_st = os.lstat(_DUMMY_SYMLINK)

            self.assertEqual(testfn_st.st_flags, new_testfn_st.st_flags)
            self.assertEqual(dummy_symlink_st.st_flags | stat.UF_IMMUTABLE,
                             new_dummy_symlink_st.st_flags)
        finally:
            posix.lchflags(_DUMMY_SYMLINK, dummy_symlink_st.st_flags)