import sys import unittest from test.support import import_helper pwd = import_helper.import_module('pwd') @unittest.skipUnless(hasattr(pwd, 'getpwall'), 'Does not have getpwall()') class PwdTest(unittest.TestCase): def test_values(self): entries = pwd.getpwall() for e in entries: self.assertEqual(len(e), 7) self.assertEqual(e[0], e.pw_name) self.assertIsInstance(e.pw_name, str) self.assertEqual(e[1], e.pw_passwd) self.assertIsInstance(e.pw_passwd, str) self.assertEqual(e[2], e.pw_uid) self.assertIsInstance(e.pw_uid, int) self.assertEqual(e[3], e.pw_gid) self.assertIsInstance(e.pw_gid, int) self.assertEqual(e[4], e.pw_gecos) self.assertIn(type(e.pw_gecos), (str, type(None))) self.assertEqual(e[5], e.pw_dir) self.assertIsInstance(e.pw_dir, str) self.assertEqual(e[6], e.pw_shell) self.assertIsInstance(e.pw_shell, str) # The following won't work, because of duplicate entries # for one uid # self.assertEqual(pwd.getpwuid(e.pw_uid), e) # instead of this collect all entries for one uid # and check afterwards (done in test_values_extended) def test_values_extended(self): entries = pwd.getpwall() entriesbyname = {} entriesbyuid = {} if len(entries) > 1000: # Huge passwd file (NIS?) -- skip this test self.skipTest('passwd file is huge; extended test skipped') for e in entries: entriesbyname.setdefault(e.pw_name, []).append(e) entriesbyuid.setdefault(e.pw_uid, []).append(e) # check whether the entry returned by getpwuid() # for each uid is among those from getpwall() for this uid for e in entries: if not e[0] or e[0] == '+': continue # skip NIS entries etc. self.assertIn(pwd.getpwnam(e.pw_name), entriesbyname[e.pw_name]) self.assertIn(pwd.getpwuid(e.pw_uid), entriesbyuid[e.pw_uid]) def test_errors(self): self.assertRaises(TypeError, pwd.getpwuid) self.assertRaises(TypeError, pwd.getpwuid, 3.14) self.assertRaises(TypeError, pwd.getpwnam) self.assertRaises(TypeError, pwd.getpwnam, 42) self.assertRaises(TypeError, pwd.getpwall, 42) # embedded null character self.assertRaisesRegex(ValueError, 'null', pwd.getpwnam, 'a\x00b') # try to get some errors bynames = {} byuids = {} for (n, p, u, g, gecos, d, s) in pwd.getpwall(): bynames[n] = u byuids[u] = n allnames = list(bynames.keys()) namei = 0 fakename = allnames[namei] if allnames else "invaliduser" while fakename in bynames: chars = list(fakename) for i in range(len(chars)): if chars[i] == 'z': chars[i] = 'A' break elif chars[i] == 'Z': continue else: chars[i] = chr(ord(chars[i]) + 1) break else: namei = namei + 1 try: fakename = allnames[namei] except IndexError: # should never happen... if so, just forget it break fakename = ''.join(chars) self.assertRaises(KeyError, pwd.getpwnam, fakename) # In some cases, byuids isn't a complete list of all users in the # system, so if we try to pick a value not in byuids (via a perturbing # loop, say), pwd.getpwuid() might still be able to find data for that # uid. Using sys.maxint may provoke the same problems, but hopefully # it will be a more repeatable failure. fakeuid = sys.maxsize self.assertNotIn(fakeuid, byuids) self.assertRaises(KeyError, pwd.getpwuid, fakeuid) # -1 shouldn't be a valid uid because it has a special meaning in many # uid-related functions self.assertRaises(KeyError, pwd.getpwuid, -1) # should be out of uid_t range self.assertRaises(KeyError, pwd.getpwuid, 2**128) self.assertRaises(KeyError, pwd.getpwuid, -2**128) if __name__ == "__main__": unittest.main()