Mini Shell
"Test posix functions"
from test import test_support
# Skip these tests if there is no posix module.
posix = test_support.import_module('posix')
import errno
import sys
import time
import os
import platform
import pwd
import shutil
import stat
import sys
import tempfile
import unittest
import warnings
_DUMMY_SYMLINK = os.path.join(tempfile.gettempdir(),
test_support.TESTFN + '-dummy-symlink')
warnings.filterwarnings('ignore', '.* potential security risk .*',
RuntimeWarning)
class PosixTester(unittest.TestCase):
def setUp(self):
# create empty file
fp = open(test_support.TESTFN, 'w+')
fp.close()
self.teardown_files = [ test_support.TESTFN ]
def tearDown(self):
for teardown_file in self.teardown_files:
os.unlink(teardown_file)
def testNoArgFunctions(self):
# test posix functions which take no arguments and have
# no side-effects which we need to cleanup (e.g., fork, wait, abort)
NO_ARG_FUNCTIONS = [ "ctermid", "getcwd", "getcwdu", "uname",
"times", "getloadavg", "tmpnam",
"getegid", "geteuid", "getgid", "getgroups",
"getpid", "getpgrp", "getppid", "getuid",
]
with warnings.catch_warnings():
warnings.filterwarnings("ignore", "", DeprecationWarning)
for name in NO_ARG_FUNCTIONS:
posix_func = getattr(posix, name, None)
if posix_func is not None:
posix_func()
self.assertRaises(TypeError, posix_func, 1)
@unittest.skipUnless(hasattr(posix, 'getresuid'),
'test needs posix.getresuid()')
def test_getresuid(self):
user_ids = posix.getresuid()
self.assertEqual(len(user_ids), 3)
for val in user_ids:
self.assertGreaterEqual(val, 0)
@unittest.skipUnless(hasattr(posix, 'getresgid'),
'test needs posix.getresgid()')
def test_getresgid(self):
group_ids = posix.getresgid()
self.assertEqual(len(group_ids), 3)
for val in group_ids:
self.assertGreaterEqual(val, 0)
@unittest.skipUnless(hasattr(posix, 'setresuid'),
'test needs posix.setresuid()')
def test_setresuid(self):
current_user_ids = posix.getresuid()
self.assertIsNone(posix.setresuid(*current_user_ids))
# -1 means don't change that value.
self.assertIsNone(posix.setresuid(-1, -1, -1))
@unittest.skipUnless(hasattr(posix, 'setresuid'),
'test needs posix.setresuid()')
def test_setresuid_exception(self):
# Don't do this test if someone is silly enough to run us as root.
current_user_ids = posix.getresuid()
if 0 not in current_user_ids:
new_user_ids = (current_user_ids[0]+1, -1, -1)
self.assertRaises(OSError, posix.setresuid, *new_user_ids)
@unittest.skipUnless(hasattr(posix, 'setresgid'),
'test needs posix.setresgid()')
def test_setresgid(self):
current_group_ids = posix.getresgid()
self.assertIsNone(posix.setresgid(*current_group_ids))
# -1 means don't change that value.
self.assertIsNone(posix.setresgid(-1, -1, -1))
@unittest.skipUnless(hasattr(posix, 'setresgid'),
'test needs posix.setresgid()')
def test_setresgid_exception(self):
# Don't do this test if someone is silly enough to run us as root.
current_group_ids = posix.getresgid()
if 0 not in current_group_ids:
new_group_ids = (current_group_ids[0]+1, -1, -1)
self.assertRaises(OSError, posix.setresgid, *new_group_ids)
@unittest.skipUnless(hasattr(posix, 'initgroups'),
"test needs os.initgroups()")
def test_initgroups(self):
# It takes a string and an integer; check that it raises a TypeError
# for other argument lists.
self.assertRaises(TypeError, posix.initgroups)
self.assertRaises(TypeError, posix.initgroups, None)
self.assertRaises(TypeError, posix.initgroups, 3, "foo")
self.assertRaises(TypeError, posix.initgroups, "foo", 3, object())
# If a non-privileged user invokes it, it should fail with OSError
# EPERM.
if os.getuid() != 0:
try:
name = pwd.getpwuid(posix.getuid()).pw_name
except KeyError:
# the current UID may not have a pwd entry
raise unittest.SkipTest("need a pwd entry")
try:
posix.initgroups(name, 13)
except OSError as e:
self.assertEqual(e.errno, errno.EPERM)
else:
self.fail("Expected OSError to be raised by initgroups")
@unittest.skipUnless(hasattr(posix, 'statvfs'),
'test needs posix.statvfs()')
def test_statvfs(self):
self.assertTrue(posix.statvfs(os.curdir))
@unittest.skipUnless(hasattr(posix, 'fstatvfs'),
'test needs posix.fstatvfs()')
def test_fstatvfs(self):
fp = open(test_support.TESTFN)
try:
self.assertTrue(posix.fstatvfs(fp.fileno()))
finally:
fp.close()
@unittest.skipUnless(hasattr(posix, 'ftruncate'),
'test needs posix.ftruncate()')
def test_ftruncate(self):
fp = open(test_support.TESTFN, 'w+')
try:
# we need to have some data to truncate
fp.write('test')
fp.flush()
posix.ftruncate(fp.fileno(), 0)
finally:
fp.close()
@unittest.skipUnless(hasattr(posix, 'dup'),
'test needs posix.dup()')
def test_dup(self):
fp = open(test_support.TESTFN)
try:
fd = posix.dup(fp.fileno())
self.assertIsInstance(fd, int)
os.close(fd)
finally:
fp.close()
@unittest.skipUnless(hasattr(posix, 'confstr'),
'test needs posix.confstr()')
def test_confstr(self):
self.assertRaises(ValueError, posix.confstr, "CS_garbage")
self.assertEqual(len(posix.confstr("CS_PATH")) > 0, True)
@unittest.skipUnless(hasattr(posix, 'dup2'),
'test needs posix.dup2()')
def test_dup2(self):
fp1 = open(test_support.TESTFN)
fp2 = open(test_support.TESTFN)
try:
posix.dup2(fp1.fileno(), fp2.fileno())
finally:
fp1.close()
fp2.close()
def fdopen_helper(self, *args):
fd = os.open(test_support.TESTFN, os.O_RDONLY)
fp2 = posix.fdopen(fd, *args)
fp2.close()
@unittest.skipUnless(hasattr(posix, 'fdopen'),
'test needs posix.fdopen()')
def test_fdopen(self):
self.fdopen_helper()
self.fdopen_helper('r')
self.fdopen_helper('r', 100)
@unittest.skipUnless(hasattr(posix, 'fdopen'),
'test needs posix.fdopen()')
def test_fdopen_directory(self):
try:
fd = os.open('.', os.O_RDONLY)
except OSError as e:
self.assertEqual(e.errno, errno.EACCES)
self.skipTest("system cannot open directories")
with self.assertRaises(IOError) as cm:
os.fdopen(fd, 'r')
self.assertEqual(cm.exception.errno, errno.EISDIR)
@unittest.skipUnless(hasattr(posix, 'fdopen') and
not sys.platform.startswith("sunos"),
'test needs posix.fdopen()')
def test_fdopen_keeps_fd_open_on_errors(self):
fd = os.open(test_support.TESTFN, os.O_RDONLY)
self.assertRaises(OSError, posix.fdopen, fd, 'w')
os.close(fd) # fd should not be closed.
@unittest.skipUnless(hasattr(posix, 'O_EXLOCK'),
'test needs posix.O_EXLOCK')
def test_osexlock(self):
fd = os.open(test_support.TESTFN,
os.O_WRONLY|os.O_EXLOCK|os.O_CREAT)
self.assertRaises(OSError, os.open, test_support.TESTFN,
os.O_WRONLY|os.O_EXLOCK|os.O_NONBLOCK)
os.close(fd)
if hasattr(posix, "O_SHLOCK"):
fd = os.open(test_support.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
self.assertRaises(OSError, os.open, test_support.TESTFN,
os.O_WRONLY|os.O_EXLOCK|os.O_NONBLOCK)
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'O_SHLOCK'),
'test needs posix.O_SHLOCK')
def test_osshlock(self):
fd1 = os.open(test_support.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
fd2 = os.open(test_support.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
os.close(fd2)
os.close(fd1)
if hasattr(posix, "O_EXLOCK"):
fd = os.open(test_support.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
self.assertRaises(OSError, os.open, test_support.TESTFN,
os.O_RDONLY|os.O_EXLOCK|os.O_NONBLOCK)
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'fstat'),
'test needs posix.fstat()')
def test_fstat(self):
fp = open(test_support.TESTFN)
try:
self.assertTrue(posix.fstat(fp.fileno()))
finally:
fp.close()
@unittest.skipUnless(hasattr(posix, 'stat'),
'test needs posix.stat()')
def test_stat(self):
self.assertTrue(posix.stat(test_support.TESTFN))
@unittest.skipUnless(hasattr(posix, 'stat'), 'test needs posix.stat()')
@unittest.skipUnless(hasattr(posix, 'makedev'), 'test needs posix.makedev()')
def test_makedev(self):
st = posix.stat(test_support.TESTFN)
dev = st.st_dev
self.assertIsInstance(dev, (int, long))
self.assertGreaterEqual(dev, 0)
major = posix.major(dev)
self.assertIsInstance(major, (int, long))
self.assertGreaterEqual(major, 0)
self.assertEqual(posix.major(int(dev)), major)
self.assertEqual(posix.major(long(dev)), major)
self.assertRaises(TypeError, posix.major, float(dev))
self.assertRaises(TypeError, posix.major)
self.assertRaises((ValueError, OverflowError), posix.major, -1)
minor = posix.minor(dev)
self.assertIsInstance(minor, (int, long))
self.assertGreaterEqual(minor, 0)
self.assertEqual(posix.minor(int(dev)), minor)
self.assertEqual(posix.minor(long(dev)), minor)
self.assertRaises(TypeError, posix.minor, float(dev))
self.assertRaises(TypeError, posix.minor)
self.assertRaises((ValueError, OverflowError), posix.minor, -1)
self.assertEqual(posix.makedev(major, minor), dev)
self.assertEqual(posix.makedev(int(major), int(minor)), dev)
self.assertEqual(posix.makedev(long(major), long(minor)), dev)
self.assertRaises(TypeError, posix.makedev, float(major), minor)
self.assertRaises(TypeError, posix.makedev, major, float(minor))
self.assertRaises(TypeError, posix.makedev, major)
self.assertRaises(TypeError, posix.makedev)
def _test_all_chown_common(self, chown_func, first_param, stat_func):
"""Common code for chown, fchown and lchown tests."""
def check_stat(uid, gid):
if stat_func is not None:
stat = stat_func(first_param)
self.assertEqual(stat.st_uid, uid)
self.assertEqual(stat.st_gid, gid)
uid = os.getuid()
gid = os.getgid()
# test a successful chown call
chown_func(first_param, uid, gid)
check_stat(uid, gid)
chown_func(first_param, -1, gid)
check_stat(uid, gid)
chown_func(first_param, uid, -1)
check_stat(uid, gid)
if uid == 0:
# Try an amusingly large uid/gid to make sure we handle
# large unsigned values. (chown lets you use any
# uid/gid you like, even if they aren't defined.)
#
# This problem keeps coming up:
# http://bugs.python.org/issue1747858
# http://bugs.python.org/issue4591
# http://bugs.python.org/issue15301
# Hopefully the fix in 4591 fixes it for good!
#
# This part of the test only runs when run as root.
# Only scary people run their tests as root.
big_value = 2**31
chown_func(first_param, big_value, big_value)
check_stat(big_value, big_value)
chown_func(first_param, -1, -1)
check_stat(big_value, big_value)
chown_func(first_param, uid, gid)
check_stat(uid, gid)
elif platform.system() in ('HP-UX', 'SunOS'):
# HP-UX and Solaris can allow a non-root user to chown() to root
# (issue #5113)
raise unittest.SkipTest("Skipping because of non-standard chown() "
"behavior")
else:
# non-root cannot chown to root, raises OSError
self.assertRaises(OSError, chown_func, first_param, 0, 0)
check_stat(uid, gid)
self.assertRaises(OSError, chown_func, first_param, 0, -1)
check_stat(uid, gid)
if 0 not in os.getgroups():
self.assertRaises(OSError, chown_func, first_param, -1, 0)
check_stat(uid, gid)
# test illegal types
for t in str, float:
self.assertRaises(TypeError, chown_func, first_param, t(uid), gid)
check_stat(uid, gid)
self.assertRaises(TypeError, chown_func, first_param, uid, t(gid))
check_stat(uid, gid)
@unittest.skipUnless(hasattr(posix, 'chown'), "test needs os.chown()")
def test_chown(self):
# raise an OSError if the file does not exist
os.unlink(test_support.TESTFN)
self.assertRaises(OSError, posix.chown, test_support.TESTFN, -1, -1)
# re-create the file
open(test_support.TESTFN, 'w').close()
self._test_all_chown_common(posix.chown, test_support.TESTFN,
getattr(posix, 'stat', None))
@unittest.skipUnless(hasattr(posix, 'fchown'), "test needs os.fchown()")
def test_fchown(self):
os.unlink(test_support.TESTFN)
# re-create the file
test_file = open(test_support.TESTFN, 'w')
try:
fd = test_file.fileno()
self._test_all_chown_common(posix.fchown, fd,
getattr(posix, 'fstat', None))
finally:
test_file.close()
@unittest.skipUnless(hasattr(posix, 'lchown'), "test needs os.lchown()")
def test_lchown(self):
os.unlink(test_support.TESTFN)
# create a symlink
os.symlink(_DUMMY_SYMLINK, test_support.TESTFN)
self._test_all_chown_common(posix.lchown, test_support.TESTFN,
getattr(posix, 'lstat', None))
@unittest.skipUnless(hasattr(posix, 'chdir'), 'test needs posix.chdir()')
def test_chdir(self):
posix.chdir(os.curdir)
self.assertRaises(OSError, posix.chdir, test_support.TESTFN)
@unittest.skipUnless(hasattr(posix, 'lsdir'), 'test needs posix.lsdir()')
def test_lsdir(self):
self.assertIn(test_support.TESTFN, posix.lsdir(os.curdir))
@unittest.skipUnless(hasattr(posix, 'access'), 'test needs posix.access()')
def test_access(self):
self.assertTrue(posix.access(test_support.TESTFN, os.R_OK))
@unittest.skipUnless(hasattr(posix, 'umask'), 'test needs posix.umask()')
def test_umask(self):
old_mask = posix.umask(0)
self.assertIsInstance(old_mask, int)
posix.umask(old_mask)
@unittest.skipUnless(hasattr(posix, 'strerror'),
'test needs posix.strerror()')
def test_strerror(self):
self.assertTrue(posix.strerror(0))
@unittest.skipUnless(hasattr(posix, 'pipe'), 'test needs posix.pipe()')
def test_pipe(self):
reader, writer = posix.pipe()
os.close(reader)
os.close(writer)
@unittest.skipUnless(hasattr(posix, 'tempnam'),
'test needs posix.tempnam()')
def test_tempnam(self):
with warnings.catch_warnings():
warnings.filterwarnings("ignore", "tempnam", DeprecationWarning)
self.assertTrue(posix.tempnam())
self.assertTrue(posix.tempnam(os.curdir))
self.assertTrue(posix.tempnam(os.curdir, 'blah'))
@unittest.skipUnless(hasattr(posix, 'tmpfile'),
'test needs posix.tmpfile()')
def test_tmpfile(self):
with warnings.catch_warnings():
warnings.filterwarnings("ignore", "tmpfile", DeprecationWarning)
fp = posix.tmpfile()
fp.close()
@unittest.skipUnless(hasattr(posix, 'utime'), 'test needs posix.utime()')
def test_utime(self):
now = time.time()
posix.utime(test_support.TESTFN, None)
self.assertRaises(TypeError, posix.utime, test_support.TESTFN, (None, None))
self.assertRaises(TypeError, posix.utime, test_support.TESTFN, (now, None))
self.assertRaises(TypeError, posix.utime, test_support.TESTFN, (None, now))
posix.utime(test_support.TESTFN, (int(now), int(now)))
posix.utime(test_support.TESTFN, (now, now))
def _test_chflags_regular_file(self, chflags_func, target_file):
st = os.stat(target_file)
self.assertTrue(hasattr(st, 'st_flags'))
# ZFS returns EOPNOTSUPP when attempting to set flag UF_IMMUTABLE.
try:
chflags_func(target_file, 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_st = os.stat(target_file)
self.assertEqual(st.st_flags | stat.UF_IMMUTABLE, new_st.st_flags)
try:
fd = open(target_file, 'w+')
except IOError as e:
self.assertEqual(e.errno, errno.EPERM)
finally:
posix.chflags(target_file, st.st_flags)
@unittest.skipUnless(hasattr(posix, 'chflags'), 'test needs os.chflags()')
def test_chflags(self):
self._test_chflags_regular_file(posix.chflags, test_support.TESTFN)
@unittest.skipUnless(hasattr(posix, 'lchflags'), 'test needs os.lchflags()')
def test_lchflags_regular_file(self):
self._test_chflags_regular_file(posix.lchflags, test_support.TESTFN)
@unittest.skipUnless(hasattr(posix, 'lchflags'), 'test needs os.lchflags()')
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)
@unittest.skipUnless(hasattr(posix, 'getcwd'),
'test needs posix.getcwd()')
def test_getcwd_long_pathnames(self):
dirname = 'getcwd-test-directory-0123456789abcdef-01234567890abcdef'
curdir = os.getcwd()
base_path = os.path.abspath(test_support.TESTFN) + '.getcwd'
try:
os.mkdir(base_path)
os.chdir(base_path)
except:
self.skipTest("cannot create directory for testing")
try:
def _create_and_do_getcwd(dirname, current_path_length = 0):
try:
os.mkdir(dirname)
except:
self.skipTest("mkdir cannot create directory sufficiently "
"deep for getcwd test")
os.chdir(dirname)
try:
os.getcwd()
if current_path_length < 4099:
_create_and_do_getcwd(dirname, current_path_length + len(dirname) + 1)
except OSError as e:
expected_errno = errno.ENAMETOOLONG
# The following platforms have quirky getcwd()
# behaviour -- see issue 9185 and 15765 for
# more information.
quirky_platform = (
'sunos' in sys.platform or
'netbsd' in sys.platform or
'openbsd' in sys.platform
)
if quirky_platform:
expected_errno = errno.ERANGE
self.assertEqual(e.errno, expected_errno)
finally:
os.chdir('..')
os.rmdir(dirname)
_create_and_do_getcwd(dirname)
finally:
os.chdir(curdir)
shutil.rmtree(base_path)
@unittest.skipUnless(hasattr(os, 'getegid'), "test needs os.getegid()")
def test_getgroups(self):
with os.popen('id -G 2>/dev/null') as idg:
groups = idg.read().strip()
ret = idg.close()
if ret != None or not groups:
raise unittest.SkipTest("need working 'id -G'")
# Issues 16698: OS X ABIs prior to 10.6 have limits on getgroups()
if sys.platform == 'darwin':
import sysconfig
dt = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET') or '10.0'
if tuple(int(n) for n in dt.split('.')[0:2]) < (10, 6):
raise unittest.SkipTest("getgroups(2) is broken prior to 10.6")
# 'id -G' and 'os.getgroups()' should return the same
# groups, ignoring order and duplicates.
# #10822 - it is implementation defined whether posix.getgroups()
# includes the effective gid so we include it anyway, since id -G does
self.assertEqual(
set([int(x) for x in groups.split()]),
set(posix.getgroups() + [posix.getegid()]))
class PosixGroupsTester(unittest.TestCase):
def setUp(self):
if posix.getuid() != 0:
raise unittest.SkipTest("not enough privileges")
if not hasattr(posix, 'getgroups'):
raise unittest.SkipTest("need posix.getgroups")
if sys.platform == 'darwin':
raise unittest.SkipTest("getgroups(2) is broken on OSX")
self.saved_groups = posix.getgroups()
def tearDown(self):
if hasattr(posix, 'setgroups'):
posix.setgroups(self.saved_groups)
elif hasattr(posix, 'initgroups'):
name = pwd.getpwuid(posix.getuid()).pw_name
posix.initgroups(name, self.saved_groups[0])
@unittest.skipUnless(hasattr(posix, 'initgroups'),
'test needs posix.initgroups()')
def test_initgroups(self):
# find missing group
g = max(self.saved_groups or [0]) + 1
name = pwd.getpwuid(posix.getuid()).pw_name
posix.initgroups(name, g)
self.assertIn(g, posix.getgroups())
@unittest.skipUnless(hasattr(posix, 'setgroups'),
'test needs posix.setgroups()')
def test_setgroups(self):
for groups in [[0], range(16)]:
posix.setgroups(groups)
self.assertListEqual(groups, posix.getgroups())
def test_main():
test_support.run_unittest(PosixTester, PosixGroupsTester)
if __name__ == '__main__':
test_main()
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