@@ -15,14 +15,44 @@
# You should have received a copy of the GNU Lesser General Public License
# along with libbtrfsutil. If not, see <http://www.gnu.org/licenses/>.
+import contextlib
import os
from pathlib import PurePath
+import pwd
import subprocess
import tempfile
import unittest
HAVE_PATH_LIKE = hasattr(PurePath, '__fspath__')
+try:
+ NOBODY_UID = pwd.getpwnam('nobody').pw_uid
+ skipUnlessHaveNobody = lambda func: func
+except KeyError:
+ NOBODY_UID = None
+ skipUnlessHaveNobody = unittest.skip('must have nobody user')
+
+
+@contextlib.contextmanager
+def drop_privs():
+ try:
+ os.seteuid(NOBODY_UID)
+ yield
+ finally:
+ os.seteuid(0)
+
+
+@contextlib.contextmanager
+def regain_privs():
+ uid = os.geteuid()
+ if uid:
+ try:
+ os.seteuid(0)
+ yield
+ finally:
+ os.seteuid(uid)
+ else:
+ yield
@unittest.skipIf(os.geteuid() != 0, 'must be run as root')
@@ -67,4 +97,3 @@ class BtrfsTestCase(unittest.TestCase):
yield fd
finally:
os.close(fd)
-