4 from ctypes import CDLL
5 from ctypes import get_errno
6 from ctypes.util import find_library
7 from typing import Dict
8 from typing import List
9 from typing import Optional
14 class LibCWrapper(object):
16 path: Optional[str] = find_library("c")
18 raise RuntimeError("libc not found")
19 self._libc = CDLL(path, use_errno=True)
21 def modfind(self, mod_name: str) -> int:
22 if self._libc.modfind(bytes(mod_name, encoding="ascii")) == -1:
26 def jail_attach(self, jid: int) -> int:
27 if self._libc.jail_attach(jid) != 0:
35 class BaseTest(object):
36 NEED_ROOT: bool = False # True if the class needs root privileges for the setup
37 TARGET_USER = None # Set to the target user by the framework
38 REQUIRED_MODULES: List[str] = []
40 def _check_modules(self):
41 for mod_name in self.REQUIRED_MODULES:
42 error_code = libc.modfind(mod_name)
44 err_str = os.strerror(error_code)
46 "kernel module '{}' not available: {}".format(mod_name, err_str)
49 def atf_vars(self) -> Dict[str, str]:
51 return {k[len(px):]: v for k, v in os.environ.items() if k.startswith(px)}
53 def drop_privileges_user(self, user: str):
54 uid = pwd.getpwnam(user)[2]
55 print("Dropping privs to {}/{}".format(user, uid))
58 def drop_privileges(self):
60 if self.TARGET_USER == "unprivileged":
61 user = self.atf_vars["unprivileged-user"]
63 user = self.TARGET_USER
64 self.drop_privileges_user(user)
67 def test_id(self) -> str:
68 # 'test_ip6_output.py::TestIP6Output::test_output6_pktinfo[ipandif] (setup)'
69 return os.environ.get("PYTEST_CURRENT_TEST").split(" ")[0]
71 def setup_method(self, method):
72 """Run all pre-requisits for the test execution"""