AppPkg/Applications/Python/Python-2.7.2/Lib/test/test_posix.py

   1 "Test posix functions"
   2
   3 from test import test_support
   4
   5 # Skip these tests if there is no posix module.
   6 posix = test_support.import_module('posix')
   7
   8 import errno
   9 import sys
  10 import time
  11 import os
  12 import pwd
  13 import shutil
  14 import sys
  15 import unittest
  16 import warnings
  17
  18
  19 warnings.filterwarnings('ignore', '.* potential security risk .*',
  20                         RuntimeWarning)
  21
  22 class PosixTester(unittest.TestCase):
  23
  24     def setUp(self):
  25         # create empty file
  26         fp = open(test_support.TESTFN, 'w+')
  27         fp.close()
  28
  29     def tearDown(self):
  30         os.unlink(test_support.TESTFN)
  31
  32     def testNoArgFunctions(self):
  33         # test posix functions which take no arguments and have
  34         # no side-effects which we need to cleanup (e.g., fork, wait, abort)
  35         NO_ARG_FUNCTIONS = [ "ctermid", "getcwd", "getcwdu", "uname",
  36                              "times", "getloadavg", "tmpnam",
  37                              "getegid", "geteuid", "getgid", "getgroups",
  38                              "getpid", "getpgrp", "getppid", "getuid",
  39                            ]
  40
  41         with warnings.catch_warnings():
  42             warnings.filterwarnings("ignore", "", DeprecationWarning)
  43             for name in NO_ARG_FUNCTIONS:
  44                 posix_func = getattr(posix, name, None)
  45                 if posix_func is not None:
  46                     posix_func()
  47                     self.assertRaises(TypeError, posix_func, 1)
  48
  49     if hasattr(posix, 'getresuid'):
  50         def test_getresuid(self):
  51             user_ids = posix.getresuid()
  52             self.assertEqual(len(user_ids), 3)
  53             for val in user_ids:
  54                 self.assertGreaterEqual(val, 0)
  55
  56     if hasattr(posix, 'getresgid'):
  57         def test_getresgid(self):
  58             group_ids = posix.getresgid()
  59             self.assertEqual(len(group_ids), 3)
  60             for val in group_ids:
  61                 self.assertGreaterEqual(val, 0)
  62
  63     if hasattr(posix, 'setresuid'):
  64         def test_setresuid(self):
  65             current_user_ids = posix.getresuid()
  66             self.assertIsNone(posix.setresuid(*current_user_ids))
  67             # -1 means don't change that value.
  68             self.assertIsNone(posix.setresuid(-1, -1, -1))
  69
  70         def test_setresuid_exception(self):
  71             # Don't do this test if someone is silly enough to run us as root.
  72             current_user_ids = posix.getresuid()
  73             if 0 not in current_user_ids:
  74                 new_user_ids = (current_user_ids[0]+1, -1, -1)
  75                 self.assertRaises(OSError, posix.setresuid, *new_user_ids)
  76
  77     if hasattr(posix, 'setresgid'):
  78         def test_setresgid(self):
  79             current_group_ids = posix.getresgid()
  80             self.assertIsNone(posix.setresgid(*current_group_ids))
  81             # -1 means don't change that value.
  82             self.assertIsNone(posix.setresgid(-1, -1, -1))
  83
  84         def test_setresgid_exception(self):
  85             # Don't do this test if someone is silly enough to run us as root.
  86             current_group_ids = posix.getresgid()
  87             if 0 not in current_group_ids:
  88                 new_group_ids = (current_group_ids[0]+1, -1, -1)
  89                 self.assertRaises(OSError, posix.setresgid, *new_group_ids)
  90
  91     @unittest.skipUnless(hasattr(posix, 'initgroups'),
  92                          "test needs os.initgroups()")
  93     def test_initgroups(self):
  94         # It takes a string and an integer; check that it raises a TypeError
  95         # for other argument lists.
  96         self.assertRaises(TypeError, posix.initgroups)
  97         self.assertRaises(TypeError, posix.initgroups, None)
  98         self.assertRaises(TypeError, posix.initgroups, 3, "foo")
  99         self.assertRaises(TypeError, posix.initgroups, "foo", 3, object())
 100
 101         # If a non-privileged user invokes it, it should fail with OSError
 102         # EPERM.
 103         if os.getuid() != 0:
 104             name = pwd.getpwuid(posix.getuid()).pw_name
 105             try:
 106                 posix.initgroups(name, 13)
 107             except OSError as e:
 108                 self.assertEqual(e.errno, errno.EPERM)
 109             else:
 110                 self.fail("Expected OSError to be raised by initgroups")
 111
 112     def test_statvfs(self):
 113         if hasattr(posix, 'statvfs'):
 114             self.assertTrue(posix.statvfs(os.curdir))
 115
 116     def test_fstatvfs(self):
 117         if hasattr(posix, 'fstatvfs'):
 118             fp = open(test_support.TESTFN)
 119             try:
 120                 self.assertTrue(posix.fstatvfs(fp.fileno()))
 121             finally:
 122                 fp.close()
 123
 124     def test_ftruncate(self):
 125         if hasattr(posix, 'ftruncate'):
 126             fp = open(test_support.TESTFN, 'w+')
 127             try:
 128                 # we need to have some data to truncate
 129                 fp.write('test')
 130                 fp.flush()
 131                 posix.ftruncate(fp.fileno(), 0)
 132             finally:
 133                 fp.close()
 134
 135     def test_dup(self):
 136         if hasattr(posix, 'dup'):
 137             fp = open(test_support.TESTFN)
 138             try:
 139                 fd = posix.dup(fp.fileno())
 140                 self.assertIsInstance(fd, int)
 141                 os.close(fd)
 142             finally:
 143                 fp.close()
 144
 145     def test_confstr(self):
 146         if hasattr(posix, 'confstr'):
 147             self.assertRaises(ValueError, posix.confstr, "CS_garbage")
 148             self.assertEqual(len(posix.confstr("CS_PATH")) > 0, True)
 149
 150     def test_dup2(self):
 151         if hasattr(posix, 'dup2'):
 152             fp1 = open(test_support.TESTFN)
 153             fp2 = open(test_support.TESTFN)
 154             try:
 155                 posix.dup2(fp1.fileno(), fp2.fileno())
 156             finally:
 157                 fp1.close()
 158                 fp2.close()
 159
 160     def fdopen_helper(self, *args):
 161         fd = os.open(test_support.TESTFN, os.O_RDONLY)
 162         fp2 = posix.fdopen(fd, *args)
 163         fp2.close()
 164
 165     def test_fdopen(self):
 166         if hasattr(posix, 'fdopen'):
 167             self.fdopen_helper()
 168             self.fdopen_helper('r')
 169             self.fdopen_helper('r', 100)
 170
 171     def test_osexlock(self):
 172         if hasattr(posix, "O_EXLOCK"):
 173             fd = os.open(test_support.TESTFN,
 174                          os.O_WRONLY|os.O_EXLOCK|os.O_CREAT)
 175             self.assertRaises(OSError, os.open, test_support.TESTFN,
 176                               os.O_WRONLY|os.O_EXLOCK|os.O_NONBLOCK)
 177             os.close(fd)
 178
 179             if hasattr(posix, "O_SHLOCK"):
 180                 fd = os.open(test_support.TESTFN,
 181                              os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
 182                 self.assertRaises(OSError, os.open, test_support.TESTFN,
 183                                   os.O_WRONLY|os.O_EXLOCK|os.O_NONBLOCK)
 184                 os.close(fd)
 185
 186     def test_osshlock(self):
 187         if hasattr(posix, "O_SHLOCK"):
 188             fd1 = os.open(test_support.TESTFN,
 189                          os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
 190             fd2 = os.open(test_support.TESTFN,
 191                           os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
 192             os.close(fd2)
 193             os.close(fd1)
 194
 195             if hasattr(posix, "O_EXLOCK"):
 196                 fd = os.open(test_support.TESTFN,
 197                              os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
 198                 self.assertRaises(OSError, os.open, test_support.TESTFN,
 199                                   os.O_RDONLY|os.O_EXLOCK|os.O_NONBLOCK)
 200                 os.close(fd)
 201
 202     def test_fstat(self):
 203         if hasattr(posix, 'fstat'):
 204             fp = open(test_support.TESTFN)
 205             try:
 206                 self.assertTrue(posix.fstat(fp.fileno()))
 207             finally:
 208                 fp.close()
 209
 210     def test_stat(self):
 211         if hasattr(posix, 'stat'):
 212             self.assertTrue(posix.stat(test_support.TESTFN))
 213
 214     def _test_all_chown_common(self, chown_func, first_param):
 215         """Common code for chown, fchown and lchown tests."""
 216         if os.getuid() == 0:
 217             try:
 218                 # Many linux distros have a nfsnobody user as MAX_UID-2
 219                 # that makes a good test case for signedness issues.
 220                 #   http://bugs.python.org/issue1747858
 221                 # This part of the test only runs when run as root.
 222                 # Only scary people run their tests as root.
 223                 ent = pwd.getpwnam('nfsnobody')
 224                 chown_func(first_param, ent.pw_uid, ent.pw_gid)
 225             except KeyError:
 226                 pass
 227         else:
 228             # non-root cannot chown to root, raises OSError
 229             self.assertRaises(OSError, chown_func,
 230                               first_param, 0, 0)
 231
 232         # test a successful chown call
 233         chown_func(first_param, os.getuid(), os.getgid())
 234
 235     @unittest.skipUnless(hasattr(posix, 'chown'), "test needs os.chown()")
 236     def test_chown(self):
 237         # raise an OSError if the file does not exist
 238         os.unlink(test_support.TESTFN)
 239         self.assertRaises(OSError, posix.chown, test_support.TESTFN, -1, -1)
 240
 241         # re-create the file
 242         open(test_support.TESTFN, 'w').close()
 243         self._test_all_chown_common(posix.chown, test_support.TESTFN)
 244
 245     @unittest.skipUnless(hasattr(posix, 'fchown'), "test needs os.fchown()")
 246     def test_fchown(self):
 247         os.unlink(test_support.TESTFN)
 248
 249         # re-create the file
 250         test_file = open(test_support.TESTFN, 'w')
 251         try:
 252             fd = test_file.fileno()
 253             self._test_all_chown_common(posix.fchown, fd)
 254         finally:
 255             test_file.close()
 256
 257     @unittest.skipUnless(hasattr(posix, 'lchown'), "test needs os.lchown()")
 258     def test_lchown(self):
 259         os.unlink(test_support.TESTFN)
 260         # create a symlink
 261         os.symlink('/tmp/dummy-symlink-target', test_support.TESTFN)
 262         self._test_all_chown_common(posix.lchown, test_support.TESTFN)
 263
 264     def test_chdir(self):
 265         if hasattr(posix, 'chdir'):
 266             posix.chdir(os.curdir)
 267             self.assertRaises(OSError, posix.chdir, test_support.TESTFN)
 268
 269     def test_lsdir(self):
 270         if hasattr(posix, 'lsdir'):
 271             self.assertIn(test_support.TESTFN, posix.lsdir(os.curdir))
 272
 273     def test_access(self):
 274         if hasattr(posix, 'access'):
 275             self.assertTrue(posix.access(test_support.TESTFN, os.R_OK))
 276
 277     def test_umask(self):
 278         if hasattr(posix, 'umask'):
 279             old_mask = posix.umask(0)
 280             self.assertIsInstance(old_mask, int)
 281             posix.umask(old_mask)
 282
 283     def test_strerror(self):
 284         if hasattr(posix, 'strerror'):
 285             self.assertTrue(posix.strerror(0))
 286
 287     def test_pipe(self):
 288         if hasattr(posix, 'pipe'):
 289             reader, writer = posix.pipe()
 290             os.close(reader)
 291             os.close(writer)
 292
 293     def test_tempnam(self):
 294         if hasattr(posix, 'tempnam'):
 295             with warnings.catch_warnings():
 296                 warnings.filterwarnings("ignore", "tempnam", DeprecationWarning)
 297                 self.assertTrue(posix.tempnam())
 298                 self.assertTrue(posix.tempnam(os.curdir))
 299                 self.assertTrue(posix.tempnam(os.curdir, 'blah'))
 300
 301     def test_tmpfile(self):
 302         if hasattr(posix, 'tmpfile'):
 303             with warnings.catch_warnings():
 304                 warnings.filterwarnings("ignore", "tmpfile", DeprecationWarning)
 305                 fp = posix.tmpfile()
 306                 fp.close()
 307
 308     def test_utime(self):
 309         if hasattr(posix, 'utime'):
 310             now = time.time()
 311             posix.utime(test_support.TESTFN, None)
 312             self.assertRaises(TypeError, posix.utime, test_support.TESTFN, (None, None))
 313             self.assertRaises(TypeError, posix.utime, test_support.TESTFN, (now, None))
 314             self.assertRaises(TypeError, posix.utime, test_support.TESTFN, (None, now))
 315             posix.utime(test_support.TESTFN, (int(now), int(now)))
 316             posix.utime(test_support.TESTFN, (now, now))
 317
 318     def test_chflags(self):
 319         if hasattr(posix, 'chflags'):
 320             st = os.stat(test_support.TESTFN)
 321             if hasattr(st, 'st_flags'):
 322                 posix.chflags(test_support.TESTFN, st.st_flags)
 323
 324     def test_lchflags(self):
 325         if hasattr(posix, 'lchflags'):
 326             st = os.stat(test_support.TESTFN)
 327             if hasattr(st, 'st_flags'):
 328                 posix.lchflags(test_support.TESTFN, st.st_flags)
 329
 330     def test_getcwd_long_pathnames(self):
 331         if hasattr(posix, 'getcwd'):
 332             dirname = 'getcwd-test-directory-0123456789abcdef-01234567890abcdef'
 333             curdir = os.getcwd()
 334             base_path = os.path.abspath(test_support.TESTFN) + '.getcwd'
 335
 336             try:
 337                 os.mkdir(base_path)
 338                 os.chdir(base_path)
 339             except:
 340 #               Just returning nothing instead of the SkipTest exception,
 341 #               because the test results in Error in that case.
 342 #               Is that ok?
 343 #                raise unittest.SkipTest, "cannot create directory for testing"
 344                 return
 345
 346             try:
 347                 def _create_and_do_getcwd(dirname, current_path_length = 0):
 348                     try:
 349                         os.mkdir(dirname)
 350                     except:
 351                         raise unittest.SkipTest, "mkdir cannot create directory sufficiently deep for getcwd test"
 352
 353                     os.chdir(dirname)
 354                     try:
 355                         os.getcwd()
 356                         if current_path_length < 4099:
 357                             _create_and_do_getcwd(dirname, current_path_length + len(dirname) + 1)
 358                     except OSError as e:
 359                         expected_errno = errno.ENAMETOOLONG
 360                         if 'sunos' in sys.platform or 'openbsd' in sys.platform:
 361                             expected_errno = errno.ERANGE # Issue 9185
 362                         self.assertEqual(e.errno, expected_errno)
 363                     finally:
 364                         os.chdir('..')
 365                         os.rmdir(dirname)
 366
 367                 _create_and_do_getcwd(dirname)
 368
 369             finally:
 370                 os.chdir(curdir)
 371                 shutil.rmtree(base_path)
 372
 373     @unittest.skipUnless(hasattr(os, 'getegid'), "test needs os.getegid()")
 374     def test_getgroups(self):
 375         with os.popen('id -G') as idg:
 376             groups = idg.read().strip()
 377
 378         if not groups:
 379             raise unittest.SkipTest("need working 'id -G'")
 380
 381         # 'id -G' and 'os.getgroups()' should return the same
 382         # groups, ignoring order and duplicates.
 383         # #10822 - it is implementation defined whether posix.getgroups()
 384         # includes the effective gid so we include it anyway, since id -G does
 385         self.assertEqual(
 386                 set([int(x) for x in groups.split()]),
 387                 set(posix.getgroups() + [posix.getegid()]))
 388
 389 class PosixGroupsTester(unittest.TestCase):
 390
 391     def setUp(self):
 392         if posix.getuid() != 0:
 393             raise unittest.SkipTest("not enough privileges")
 394         if not hasattr(posix, 'getgroups'):
 395             raise unittest.SkipTest("need posix.getgroups")
 396         if sys.platform == 'darwin':
 397             raise unittest.SkipTest("getgroups(2) is broken on OSX")
 398         self.saved_groups = posix.getgroups()
 399
 400     def tearDown(self):
 401         if hasattr(posix, 'setgroups'):
 402             posix.setgroups(self.saved_groups)
 403         elif hasattr(posix, 'initgroups'):
 404             name = pwd.getpwuid(posix.getuid()).pw_name
 405             posix.initgroups(name, self.saved_groups[0])
 406
 407     @unittest.skipUnless(hasattr(posix, 'initgroups'),
 408                          "test needs posix.initgroups()")
 409     def test_initgroups(self):
 410         # find missing group
 411
 412         g = max(self.saved_groups) + 1
 413         name = pwd.getpwuid(posix.getuid()).pw_name
 414         posix.initgroups(name, g)
 415         self.assertIn(g, posix.getgroups())
 416
 417     @unittest.skipUnless(hasattr(posix, 'setgroups'),
 418                          "test needs posix.setgroups()")
 419     def test_setgroups(self):
 420         for groups in [[0], range(16)]:
 421             posix.setgroups(groups)
 422             self.assertListEqual(groups, posix.getgroups())
 423
 424
 425 def test_main():
 426     test_support.run_unittest(PosixTester, PosixGroupsTester)
 427
 428 if __name__ == '__main__':
 429     test_main()