cpython/Lib/test/test_posix.py

1030 lines
40 KiB
Python

"Test posix functions"
from test import support
# Skip these tests if there is no posix module.
posix = support.import_module('posix')
import errno
import sys
import time
import os
import fcntl
import pwd
import shutil
import stat
import tempfile
import unittest
import warnings
_DUMMY_SYMLINK = os.path.join(tempfile.gettempdir(),
support.TESTFN + '-dummy-symlink')
class PosixTester(unittest.TestCase):
def setUp(self):
# create empty file
fp = open(support.TESTFN, 'w+')
fp.close()
self.teardown_files = [ support.TESTFN ]
self._warnings_manager = support.check_warnings()
self._warnings_manager.__enter__()
warnings.filterwarnings('ignore', '.* potential security risk .*',
RuntimeWarning)
def tearDown(self):
for teardown_file in self.teardown_files:
support.unlink(teardown_file)
self._warnings_manager.__exit__(None, None, None)
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", "getcwdb", "uname",
"times", "getloadavg",
"getegid", "geteuid", "getgid", "getgroups",
"getpid", "getpgrp", "getppid", "getuid", "sync",
]
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)
if hasattr(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)
if hasattr(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)
if hasattr(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))
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)
if hasattr(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))
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:
name = pwd.getpwuid(posix.getuid()).pw_name
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")
def test_statvfs(self):
if hasattr(posix, 'statvfs'):
self.assertTrue(posix.statvfs(os.curdir))
def test_fstatvfs(self):
if hasattr(posix, 'fstatvfs'):
fp = open(support.TESTFN)
try:
self.assertTrue(posix.fstatvfs(fp.fileno()))
finally:
fp.close()
def test_ftruncate(self):
if hasattr(posix, 'ftruncate'):
fp = open(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, 'truncate'), "test needs posix.truncate()")
def test_truncate(self):
with open(support.TESTFN, 'w') as fp:
fp.write('test')
fp.flush()
posix.truncate(support.TESTFN, 0)
@unittest.skipUnless(hasattr(posix, 'fexecve'), "test needs posix.fexecve()")
@unittest.skipUnless(hasattr(os, 'fork'), "test needs os.fork()")
@unittest.skipUnless(hasattr(os, 'waitpid'), "test needs os.waitpid()")
def test_fexecve(self):
fp = os.open(sys.executable, os.O_RDONLY)
try:
pid = os.fork()
if pid == 0:
os.chdir(os.path.split(sys.executable)[0])
posix.fexecve(fp, [sys.executable, '-c', 'pass'], os.environ)
else:
self.assertEqual(os.waitpid(pid, 0), (pid, 0))
finally:
os.close(fp)
@unittest.skipUnless(hasattr(posix, 'waitid'), "test needs posix.waitid()")
@unittest.skipUnless(hasattr(os, 'fork'), "test needs os.fork()")
def test_waitid(self):
pid = os.fork()
if pid == 0:
os.chdir(os.path.split(sys.executable)[0])
posix.execve(sys.executable, [sys.executable, '-c', 'pass'], os.environ)
else:
res = posix.waitid(posix.P_PID, pid, posix.WEXITED)
self.assertEqual(pid, res.si_pid)
@unittest.skipUnless(hasattr(posix, 'lockf'), "test needs posix.lockf()")
def test_lockf(self):
fd = os.open(support.TESTFN, os.O_WRONLY | os.O_CREAT)
try:
os.write(fd, b'test')
os.lseek(fd, 0, os.SEEK_SET)
posix.lockf(fd, posix.F_LOCK, 4)
# section is locked
posix.lockf(fd, posix.F_ULOCK, 4)
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'pread'), "test needs posix.pread()")
def test_pread(self):
fd = os.open(support.TESTFN, os.O_RDWR | os.O_CREAT)
try:
os.write(fd, b'test')
os.lseek(fd, 0, os.SEEK_SET)
self.assertEqual(b'es', posix.pread(fd, 2, 1))
# the first pread() shoudn't disturb the file offset
self.assertEqual(b'te', posix.read(fd, 2))
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'pwrite'), "test needs posix.pwrite()")
def test_pwrite(self):
fd = os.open(support.TESTFN, os.O_RDWR | os.O_CREAT)
try:
os.write(fd, b'test')
os.lseek(fd, 0, os.SEEK_SET)
posix.pwrite(fd, b'xx', 1)
self.assertEqual(b'txxt', posix.read(fd, 4))
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'posix_fallocate'),
"test needs posix.posix_fallocate()")
def test_posix_fallocate(self):
fd = os.open(support.TESTFN, os.O_WRONLY | os.O_CREAT)
try:
posix.posix_fallocate(fd, 0, 10)
except OSError as inst:
# issue10812, ZFS doesn't appear to support posix_fallocate,
# so skip Solaris-based since they are likely to have ZFS.
if inst.errno != errno.EINVAL or not sys.platform.startswith("sunos"):
raise
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'posix_fadvise'),
"test needs posix.posix_fadvise()")
def test_posix_fadvise(self):
fd = os.open(support.TESTFN, os.O_RDONLY)
try:
posix.posix_fadvise(fd, 0, 0, posix.POSIX_FADV_WILLNEED)
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'futimes'), "test needs posix.futimes()")
def test_futimes(self):
now = time.time()
fd = os.open(support.TESTFN, os.O_RDONLY)
try:
posix.futimes(fd, None)
self.assertRaises(TypeError, posix.futimes, fd, (None, None))
self.assertRaises(TypeError, posix.futimes, fd, (now, None))
self.assertRaises(TypeError, posix.futimes, fd, (None, now))
posix.futimes(fd, (int(now), int(now)))
posix.futimes(fd, (now, now))
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'lutimes'), "test needs posix.lutimes()")
def test_lutimes(self):
now = time.time()
posix.lutimes(support.TESTFN, None)
self.assertRaises(TypeError, posix.lutimes, support.TESTFN, (None, None))
self.assertRaises(TypeError, posix.lutimes, support.TESTFN, (now, None))
self.assertRaises(TypeError, posix.lutimes, support.TESTFN, (None, now))
posix.lutimes(support.TESTFN, (int(now), int(now)))
posix.lutimes(support.TESTFN, (now, now))
@unittest.skipUnless(hasattr(posix, 'futimens'), "test needs posix.futimens()")
def test_futimens(self):
now = time.time()
fd = os.open(support.TESTFN, os.O_RDONLY)
try:
self.assertRaises(TypeError, posix.futimens, fd, (None, None), (None, None))
self.assertRaises(TypeError, posix.futimens, fd, (now, 0), None)
self.assertRaises(TypeError, posix.futimens, fd, None, (now, 0))
posix.futimens(fd, (int(now), int((now - int(now)) * 1e9)),
(int(now), int((now - int(now)) * 1e9)))
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'writev'), "test needs posix.writev()")
def test_writev(self):
fd = os.open(support.TESTFN, os.O_RDWR | os.O_CREAT)
try:
os.writev(fd, (b'test1', b'tt2', b't3'))
os.lseek(fd, 0, os.SEEK_SET)
self.assertEqual(b'test1tt2t3', posix.read(fd, 10))
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'readv'), "test needs posix.readv()")
def test_readv(self):
fd = os.open(support.TESTFN, os.O_RDWR | os.O_CREAT)
try:
os.write(fd, b'test1tt2t3')
os.lseek(fd, 0, os.SEEK_SET)
buf = [bytearray(i) for i in [5, 3, 2]]
self.assertEqual(posix.readv(fd, buf), 10)
self.assertEqual([b'test1', b'tt2', b't3'], [bytes(i) for i in buf])
finally:
os.close(fd)
def test_dup(self):
if hasattr(posix, 'dup'):
fp = open(support.TESTFN)
try:
fd = posix.dup(fp.fileno())
self.assertIsInstance(fd, int)
os.close(fd)
finally:
fp.close()
def test_confstr(self):
if hasattr(posix, 'confstr'):
self.assertRaises(ValueError, posix.confstr, "CS_garbage")
self.assertEqual(len(posix.confstr("CS_PATH")) > 0, True)
def test_dup2(self):
if hasattr(posix, 'dup2'):
fp1 = open(support.TESTFN)
fp2 = open(support.TESTFN)
try:
posix.dup2(fp1.fileno(), fp2.fileno())
finally:
fp1.close()
fp2.close()
@unittest.skipUnless(hasattr(os, 'O_CLOEXEC'), "needs os.O_CLOEXEC")
@support.requires_linux_version(2, 6, 23)
def test_oscloexec(self):
fd = os.open(support.TESTFN, os.O_RDONLY|os.O_CLOEXEC)
self.addCleanup(os.close, fd)
self.assertTrue(fcntl.fcntl(fd, fcntl.F_GETFD) & fcntl.FD_CLOEXEC)
def test_osexlock(self):
if hasattr(posix, "O_EXLOCK"):
fd = os.open(support.TESTFN,
os.O_WRONLY|os.O_EXLOCK|os.O_CREAT)
self.assertRaises(OSError, os.open, support.TESTFN,
os.O_WRONLY|os.O_EXLOCK|os.O_NONBLOCK)
os.close(fd)
if hasattr(posix, "O_SHLOCK"):
fd = os.open(support.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
self.assertRaises(OSError, os.open, support.TESTFN,
os.O_WRONLY|os.O_EXLOCK|os.O_NONBLOCK)
os.close(fd)
def test_osshlock(self):
if hasattr(posix, "O_SHLOCK"):
fd1 = os.open(support.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
fd2 = os.open(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(support.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
self.assertRaises(OSError, os.open, support.TESTFN,
os.O_RDONLY|os.O_EXLOCK|os.O_NONBLOCK)
os.close(fd)
def test_fstat(self):
if hasattr(posix, 'fstat'):
fp = open(support.TESTFN)
try:
self.assertTrue(posix.fstat(fp.fileno()))
finally:
fp.close()
def test_stat(self):
if hasattr(posix, 'stat'):
self.assertTrue(posix.stat(support.TESTFN))
@unittest.skipUnless(hasattr(posix, 'mkfifo'), "don't have mkfifo()")
def test_mkfifo(self):
support.unlink(support.TESTFN)
posix.mkfifo(support.TESTFN, stat.S_IRUSR | stat.S_IWUSR)
self.assertTrue(stat.S_ISFIFO(posix.stat(support.TESTFN).st_mode))
@unittest.skipUnless(hasattr(posix, 'mknod') and hasattr(stat, 'S_IFIFO'),
"don't have mknod()/S_IFIFO")
def test_mknod(self):
# Test using mknod() to create a FIFO (the only use specified
# by POSIX).
support.unlink(support.TESTFN)
mode = stat.S_IFIFO | stat.S_IRUSR | stat.S_IWUSR
try:
posix.mknod(support.TESTFN, mode, 0)
except OSError as e:
# Some old systems don't allow unprivileged users to use
# mknod(), or only support creating device nodes.
self.assertIn(e.errno, (errno.EPERM, errno.EINVAL))
else:
self.assertTrue(stat.S_ISFIFO(posix.stat(support.TESTFN).st_mode))
def _test_all_chown_common(self, chown_func, first_param):
"""Common code for chown, fchown and lchown tests."""
if os.getuid() == 0:
try:
# Many linux distros have a nfsnobody user as MAX_UID-2
# that makes a good test case for signedness issues.
# http://bugs.python.org/issue1747858
# This part of the test only runs when run as root.
# Only scary people run their tests as root.
ent = pwd.getpwnam('nfsnobody')
chown_func(first_param, ent.pw_uid, ent.pw_gid)
except KeyError:
pass
else:
# non-root cannot chown to root, raises OSError
self.assertRaises(OSError, chown_func,
first_param, 0, 0)
# test a successful chown call
chown_func(first_param, os.getuid(), os.getgid())
@unittest.skipUnless(hasattr(posix, 'chown'), "test needs os.chown()")
def test_chown(self):
# raise an OSError if the file does not exist
os.unlink(support.TESTFN)
self.assertRaises(OSError, posix.chown, support.TESTFN, -1, -1)
# re-create the file
support.create_empty_file(support.TESTFN)
self._test_all_chown_common(posix.chown, support.TESTFN)
@unittest.skipUnless(hasattr(posix, 'fchown'), "test needs os.fchown()")
def test_fchown(self):
os.unlink(support.TESTFN)
# re-create the file
test_file = open(support.TESTFN, 'w')
try:
fd = test_file.fileno()
self._test_all_chown_common(posix.fchown, fd)
finally:
test_file.close()
@unittest.skipUnless(hasattr(posix, 'lchown'), "test needs os.lchown()")
def test_lchown(self):
os.unlink(support.TESTFN)
# create a symlink
os.symlink(_DUMMY_SYMLINK, support.TESTFN)
self._test_all_chown_common(posix.lchown, support.TESTFN)
def test_chdir(self):
if hasattr(posix, 'chdir'):
posix.chdir(os.curdir)
self.assertRaises(OSError, posix.chdir, support.TESTFN)
def test_listdir(self):
if hasattr(posix, 'listdir'):
self.assertTrue(support.TESTFN in posix.listdir(os.curdir))
def test_listdir_default(self):
# When listdir is called without argument, it's the same as listdir(os.curdir)
if hasattr(posix, 'listdir'):
self.assertTrue(support.TESTFN in posix.listdir())
@unittest.skipUnless(hasattr(posix, 'fdlistdir'), "test needs posix.fdlistdir()")
def test_fdlistdir(self):
f = posix.open(posix.getcwd(), posix.O_RDONLY)
self.assertEqual(
sorted(posix.listdir('.')),
sorted(posix.fdlistdir(f))
)
# Check the fd was closed by fdlistdir
with self.assertRaises(OSError) as ctx:
posix.close(f)
self.assertEqual(ctx.exception.errno, errno.EBADF)
def test_access(self):
if hasattr(posix, 'access'):
self.assertTrue(posix.access(support.TESTFN, os.R_OK))
def test_umask(self):
if hasattr(posix, 'umask'):
old_mask = posix.umask(0)
self.assertIsInstance(old_mask, int)
posix.umask(old_mask)
def test_strerror(self):
if hasattr(posix, 'strerror'):
self.assertTrue(posix.strerror(0))
def test_pipe(self):
if hasattr(posix, 'pipe'):
reader, writer = posix.pipe()
os.close(reader)
os.close(writer)
@unittest.skipUnless(hasattr(os, 'pipe2'), "test needs os.pipe2()")
@support.requires_linux_version(2, 6, 27)
def test_pipe2(self):
self.assertRaises(TypeError, os.pipe2, 'DEADBEEF')
self.assertRaises(TypeError, os.pipe2, 0, 0)
# try calling with flags = 0, like os.pipe()
r, w = os.pipe2(0)
os.close(r)
os.close(w)
# test flags
r, w = os.pipe2(os.O_CLOEXEC|os.O_NONBLOCK)
self.addCleanup(os.close, r)
self.addCleanup(os.close, w)
self.assertTrue(fcntl.fcntl(r, fcntl.F_GETFD) & fcntl.FD_CLOEXEC)
self.assertTrue(fcntl.fcntl(w, fcntl.F_GETFD) & fcntl.FD_CLOEXEC)
# try reading from an empty pipe: this should fail, not block
self.assertRaises(OSError, os.read, r, 1)
# try a write big enough to fill-up the pipe: this should either
# fail or perform a partial write, not block
try:
os.write(w, b'x' * support.PIPE_MAX_SIZE)
except OSError:
pass
def test_utime(self):
if hasattr(posix, 'utime'):
now = time.time()
posix.utime(support.TESTFN, None)
self.assertRaises(TypeError, posix.utime, support.TESTFN, (None, None))
self.assertRaises(TypeError, posix.utime, support.TESTFN, (now, None))
self.assertRaises(TypeError, posix.utime, support.TESTFN, (None, now))
posix.utime(support.TESTFN, (int(now), int(now)))
posix.utime(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'))
chflags_func(target_file, st.st_flags | stat.UF_IMMUTABLE)
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, support.TESTFN)
@unittest.skipUnless(hasattr(posix, 'lchflags'), 'test needs os.lchflags()')
def test_lchflags_regular_file(self):
self._test_chflags_regular_file(posix.lchflags, support.TESTFN)
@unittest.skipUnless(hasattr(posix, 'lchflags'), 'test needs os.lchflags()')
def test_lchflags_symlink(self):
testfn_st = os.stat(support.TESTFN)
self.assertTrue(hasattr(testfn_st, 'st_flags'))
os.symlink(support.TESTFN, _DUMMY_SYMLINK)
self.teardown_files.append(_DUMMY_SYMLINK)
dummy_symlink_st = os.lstat(_DUMMY_SYMLINK)
posix.lchflags(_DUMMY_SYMLINK,
dummy_symlink_st.st_flags | stat.UF_IMMUTABLE)
try:
new_testfn_st = os.stat(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)
def test_environ(self):
if os.name == "nt":
item_type = str
else:
item_type = bytes
for k, v in posix.environ.items():
self.assertEqual(type(k), item_type)
self.assertEqual(type(v), item_type)
def test_getcwd_long_pathnames(self):
if hasattr(posix, 'getcwd'):
dirname = 'getcwd-test-directory-0123456789abcdef-01234567890abcdef'
curdir = os.getcwd()
base_path = os.path.abspath(support.TESTFN) + '.getcwd'
try:
os.mkdir(base_path)
os.chdir(base_path)
except:
# Just returning nothing instead of the SkipTest exception,
# because the test results in Error in that case.
# Is that ok?
# raise unittest.SkipTest("cannot create directory for testing")
return
def _create_and_do_getcwd(dirname, current_path_length = 0):
try:
os.mkdir(dirname)
except:
raise unittest.SkipTest("mkdir cannot create directory sufficiently deep for getcwd test")
os.chdir(dirname)
try:
os.getcwd()
if current_path_length < 1027:
_create_and_do_getcwd(dirname, current_path_length + len(dirname) + 1)
finally:
os.chdir('..')
os.rmdir(dirname)
_create_and_do_getcwd(dirname)
finally:
os.chdir(curdir)
support.rmtree(base_path)
@unittest.skipUnless(hasattr(posix, 'getgrouplist'), "test needs posix.getgrouplist()")
@unittest.skipUnless(hasattr(pwd, 'getpwuid'), "test needs pwd.getpwuid()")
@unittest.skipUnless(hasattr(os, 'getuid'), "test needs os.getuid()")
def test_getgrouplist(self):
with os.popen('id -G') as idg:
groups = idg.read().strip()
if not groups:
raise unittest.SkipTest("need working 'id -G'")
self.assertEqual(
set([int(x) for x in groups.split()]),
set(posix.getgrouplist(pwd.getpwuid(os.getuid())[0],
pwd.getpwuid(os.getuid())[3])))
@unittest.skipUnless(hasattr(os, 'getegid'), "test needs os.getegid()")
def test_getgroups(self):
with os.popen('id -G') as idg:
groups = idg.read().strip()
if not groups:
raise unittest.SkipTest("need working 'id -G'")
# '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()]))
# tests for the posix *at functions follow
@unittest.skipUnless(hasattr(posix, 'faccessat'), "test needs posix.faccessat()")
def test_faccessat(self):
f = posix.open(posix.getcwd(), posix.O_RDONLY)
try:
self.assertTrue(posix.faccessat(f, support.TESTFN, os.R_OK))
finally:
posix.close(f)
@unittest.skipUnless(hasattr(posix, 'fchmodat'), "test needs posix.fchmodat()")
def test_fchmodat(self):
os.chmod(support.TESTFN, stat.S_IRUSR)
f = posix.open(posix.getcwd(), posix.O_RDONLY)
try:
posix.fchmodat(f, support.TESTFN, stat.S_IRUSR | stat.S_IWUSR)
s = posix.stat(support.TESTFN)
self.assertEqual(s[0] & stat.S_IRWXU, stat.S_IRUSR | stat.S_IWUSR)
finally:
posix.close(f)
@unittest.skipUnless(hasattr(posix, 'fchownat'), "test needs posix.fchownat()")
def test_fchownat(self):
support.unlink(support.TESTFN)
support.create_empty_file(support.TESTFN)
f = posix.open(posix.getcwd(), posix.O_RDONLY)
try:
posix.fchownat(f, support.TESTFN, os.getuid(), os.getgid())
finally:
posix.close(f)
@unittest.skipUnless(hasattr(posix, 'fstatat'), "test needs posix.fstatat()")
def test_fstatat(self):
support.unlink(support.TESTFN)
with open(support.TESTFN, 'w') as outfile:
outfile.write("testline\n")
f = posix.open(posix.getcwd(), posix.O_RDONLY)
try:
s1 = posix.stat(support.TESTFN)
s2 = posix.fstatat(f, support.TESTFN)
self.assertEqual(s1, s2)
finally:
posix.close(f)
@unittest.skipUnless(hasattr(posix, 'futimesat'), "test needs posix.futimesat()")
def test_futimesat(self):
f = posix.open(posix.getcwd(), posix.O_RDONLY)
try:
now = time.time()
posix.futimesat(f, support.TESTFN, None)
self.assertRaises(TypeError, posix.futimesat, f, support.TESTFN, (None, None))
self.assertRaises(TypeError, posix.futimesat, f, support.TESTFN, (now, None))
self.assertRaises(TypeError, posix.futimesat, f, support.TESTFN, (None, now))
posix.futimesat(f, support.TESTFN, (int(now), int(now)))
posix.futimesat(f, support.TESTFN, (now, now))
finally:
posix.close(f)
@unittest.skipUnless(hasattr(posix, 'linkat'), "test needs posix.linkat()")
def test_linkat(self):
f = posix.open(posix.getcwd(), posix.O_RDONLY)
try:
posix.linkat(f, support.TESTFN, f, support.TESTFN + 'link')
# should have same inodes
self.assertEqual(posix.stat(support.TESTFN)[1],
posix.stat(support.TESTFN + 'link')[1])
finally:
posix.close(f)
support.unlink(support.TESTFN + 'link')
@unittest.skipUnless(hasattr(posix, 'mkdirat'), "test needs posix.mkdirat()")
def test_mkdirat(self):
f = posix.open(posix.getcwd(), posix.O_RDONLY)
try:
posix.mkdirat(f, support.TESTFN + 'dir')
posix.stat(support.TESTFN + 'dir') # should not raise exception
finally:
posix.close(f)
support.rmtree(support.TESTFN + 'dir')
@unittest.skipUnless(hasattr(posix, 'mknodat') and hasattr(stat, 'S_IFIFO'),
"don't have mknodat()/S_IFIFO")
def test_mknodat(self):
# Test using mknodat() to create a FIFO (the only use specified
# by POSIX).
support.unlink(support.TESTFN)
mode = stat.S_IFIFO | stat.S_IRUSR | stat.S_IWUSR
f = posix.open(posix.getcwd(), posix.O_RDONLY)
try:
posix.mknodat(f, support.TESTFN, mode, 0)
except OSError as e:
# Some old systems don't allow unprivileged users to use
# mknod(), or only support creating device nodes.
self.assertIn(e.errno, (errno.EPERM, errno.EINVAL))
else:
self.assertTrue(stat.S_ISFIFO(posix.stat(support.TESTFN).st_mode))
finally:
posix.close(f)
@unittest.skipUnless(hasattr(posix, 'openat'), "test needs posix.openat()")
def test_openat(self):
support.unlink(support.TESTFN)
with open(support.TESTFN, 'w') as outfile:
outfile.write("testline\n")
a = posix.open(posix.getcwd(), posix.O_RDONLY)
b = posix.openat(a, support.TESTFN, posix.O_RDONLY)
try:
res = posix.read(b, 9).decode(encoding="utf-8")
self.assertEqual("testline\n", res)
finally:
posix.close(a)
posix.close(b)
@unittest.skipUnless(hasattr(posix, 'readlinkat'), "test needs posix.readlinkat()")
def test_readlinkat(self):
os.symlink(support.TESTFN, support.TESTFN + 'link')
f = posix.open(posix.getcwd(), posix.O_RDONLY)
try:
self.assertEqual(posix.readlink(support.TESTFN + 'link'),
posix.readlinkat(f, support.TESTFN + 'link'))
finally:
support.unlink(support.TESTFN + 'link')
posix.close(f)
@unittest.skipUnless(hasattr(posix, 'renameat'), "test needs posix.renameat()")
def test_renameat(self):
support.unlink(support.TESTFN)
support.create_empty_file(support.TESTFN + 'ren')
f = posix.open(posix.getcwd(), posix.O_RDONLY)
try:
posix.renameat(f, support.TESTFN + 'ren', f, support.TESTFN)
except:
posix.rename(support.TESTFN + 'ren', support.TESTFN)
raise
else:
posix.stat(support.TESTFN) # should not throw exception
finally:
posix.close(f)
@unittest.skipUnless(hasattr(posix, 'symlinkat'), "test needs posix.symlinkat()")
def test_symlinkat(self):
f = posix.open(posix.getcwd(), posix.O_RDONLY)
try:
posix.symlinkat(support.TESTFN, f, support.TESTFN + 'link')
self.assertEqual(posix.readlink(support.TESTFN + 'link'), support.TESTFN)
finally:
posix.close(f)
support.unlink(support.TESTFN + 'link')
@unittest.skipUnless(hasattr(posix, 'unlinkat'), "test needs posix.unlinkat()")
def test_unlinkat(self):
f = posix.open(posix.getcwd(), posix.O_RDONLY)
support.create_empty_file(support.TESTFN + 'del')
posix.stat(support.TESTFN + 'del') # should not throw exception
try:
posix.unlinkat(f, support.TESTFN + 'del')
except:
support.unlink(support.TESTFN + 'del')
raise
else:
self.assertRaises(OSError, posix.stat, support.TESTFN + 'link')
finally:
posix.close(f)
@unittest.skipUnless(hasattr(posix, 'utimensat'), "test needs posix.utimensat()")
def test_utimensat(self):
f = posix.open(posix.getcwd(), posix.O_RDONLY)
try:
now = time.time()
posix.utimensat(f, support.TESTFN, None, None)
self.assertRaises(TypeError, posix.utimensat, f, support.TESTFN, (None, None), (None, None))
self.assertRaises(TypeError, posix.utimensat, f, support.TESTFN, (now, 0), None)
self.assertRaises(TypeError, posix.utimensat, f, support.TESTFN, None, (now, 0))
posix.utimensat(f, support.TESTFN, (int(now), int((now - int(now)) * 1e9)),
(int(now), int((now - int(now)) * 1e9)))
finally:
posix.close(f)
@unittest.skipUnless(hasattr(posix, 'mkfifoat'), "don't have mkfifoat()")
def test_mkfifoat(self):
support.unlink(support.TESTFN)
f = posix.open(posix.getcwd(), posix.O_RDONLY)
try:
posix.mkfifoat(f, support.TESTFN, stat.S_IRUSR | stat.S_IWUSR)
self.assertTrue(stat.S_ISFIFO(posix.stat(support.TESTFN).st_mode))
finally:
posix.close(f)
requires_sched_h = unittest.skipUnless(hasattr(posix, 'sched_yield'),
"don't have scheduling support")
requires_sched_affinity = unittest.skipUnless(hasattr(posix, 'cpu_set'),
"don't have sched affinity support")
@requires_sched_h
def test_sched_yield(self):
# This has no error conditions (at least on Linux).
posix.sched_yield()
@requires_sched_h
@unittest.skipUnless(hasattr(posix, 'sched_get_priority_max'),
"requires sched_get_priority_max()")
def test_sched_priority(self):
# Round-robin usually has interesting priorities.
pol = posix.SCHED_RR
lo = posix.sched_get_priority_min(pol)
hi = posix.sched_get_priority_max(pol)
self.assertIsInstance(lo, int)
self.assertIsInstance(hi, int)
self.assertGreaterEqual(hi, lo)
# OSX evidently just returns 15 without checking the argument.
if sys.platform != "darwin":
self.assertRaises(OSError, posix.sched_get_priority_min, -23)
self.assertRaises(OSError, posix.sched_get_priority_max, -23)
@unittest.skipUnless(hasattr(posix, 'sched_setscheduler'), "can't change scheduler")
def test_get_and_set_scheduler_and_param(self):
possible_schedulers = [sched for name, sched in posix.__dict__.items()
if name.startswith("SCHED_")]
mine = posix.sched_getscheduler(0)
self.assertIn(mine, possible_schedulers)
try:
init = posix.sched_getscheduler(1)
except OSError as e:
if e.errno != errno.EPERM and e.errno != errno.ESRCH:
raise
else:
self.assertIn(init, possible_schedulers)
self.assertRaises(OSError, posix.sched_getscheduler, -1)
self.assertRaises(OSError, posix.sched_getparam, -1)
param = posix.sched_getparam(0)
self.assertIsInstance(param.sched_priority, int)
try:
posix.sched_setscheduler(0, mine, param)
except OSError as e:
if e.errno != errno.EPERM:
raise
# POSIX states that calling sched_setparam() on a process with a
# scheduling policy other than SCHED_FIFO or SCHED_RR is
# implementation-defined: FreeBSD returns EINVAL.
if not sys.platform.startswith('freebsd'):
posix.sched_setparam(0, param)
self.assertRaises(OSError, posix.sched_setparam, -1, param)
self.assertRaises(OSError, posix.sched_setscheduler, -1, mine, param)
self.assertRaises(TypeError, posix.sched_setscheduler, 0, mine, None)
self.assertRaises(TypeError, posix.sched_setparam, 0, 43)
param = posix.sched_param(None)
self.assertRaises(TypeError, posix.sched_setparam, 0, param)
large = 214748364700
param = posix.sched_param(large)
self.assertRaises(OverflowError, posix.sched_setparam, 0, param)
param = posix.sched_param(sched_priority=-large)
self.assertRaises(OverflowError, posix.sched_setparam, 0, param)
@unittest.skipUnless(hasattr(posix, "sched_rr_get_interval"), "no function")
def test_sched_rr_get_interval(self):
try:
interval = posix.sched_rr_get_interval(0)
except OSError as e:
# This likely means that sched_rr_get_interval is only valid for
# processes with the SCHED_RR scheduler in effect.
if e.errno != errno.EINVAL:
raise
self.skipTest("only works on SCHED_RR processes")
self.assertIsInstance(interval, float)
# Reasonable constraints, I think.
self.assertGreaterEqual(interval, 0.)
self.assertLess(interval, 1.)
@requires_sched_affinity
def test_sched_affinity(self):
mask = posix.sched_getaffinity(0, 1024)
self.assertGreaterEqual(mask.count(), 1)
self.assertIsInstance(mask, posix.cpu_set)
self.assertRaises(OSError, posix.sched_getaffinity, -1, 1024)
empty = posix.cpu_set(10)
posix.sched_setaffinity(0, mask)
self.assertRaises(OSError, posix.sched_setaffinity, 0, empty)
self.assertRaises(OSError, posix.sched_setaffinity, -1, mask)
@requires_sched_affinity
def test_cpu_set_basic(self):
s = posix.cpu_set(10)
self.assertEqual(len(s), 10)
self.assertEqual(s.count(), 0)
s.set(0)
s.set(9)
self.assertTrue(s.isset(0))
self.assertTrue(s.isset(9))
self.assertFalse(s.isset(5))
self.assertEqual(s.count(), 2)
s.clear(0)
self.assertFalse(s.isset(0))
self.assertEqual(s.count(), 1)
s.zero()
self.assertFalse(s.isset(0))
self.assertFalse(s.isset(9))
self.assertEqual(s.count(), 0)
self.assertRaises(ValueError, s.set, -1)
self.assertRaises(ValueError, s.set, 10)
self.assertRaises(ValueError, s.clear, -1)
self.assertRaises(ValueError, s.clear, 10)
self.assertRaises(ValueError, s.isset, -1)
self.assertRaises(ValueError, s.isset, 10)
@requires_sched_affinity
def test_cpu_set_cmp(self):
self.assertNotEqual(posix.cpu_set(11), posix.cpu_set(12))
l = posix.cpu_set(10)
r = posix.cpu_set(10)
self.assertEqual(l, r)
l.set(1)
self.assertNotEqual(l, r)
r.set(1)
self.assertEqual(l, r)
@requires_sched_affinity
def test_cpu_set_bitwise(self):
l = posix.cpu_set(5)
l.set(0)
l.set(1)
r = posix.cpu_set(5)
r.set(1)
r.set(2)
b = l & r
self.assertEqual(b.count(), 1)
self.assertTrue(b.isset(1))
b = l | r
self.assertEqual(b.count(), 3)
self.assertTrue(b.isset(0))
self.assertTrue(b.isset(1))
self.assertTrue(b.isset(2))
b = l ^ r
self.assertEqual(b.count(), 2)
self.assertTrue(b.isset(0))
self.assertFalse(b.isset(1))
self.assertTrue(b.isset(2))
b = l
b |= r
self.assertIs(b, l)
self.assertEqual(l.count(), 3)
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) + 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], list(range(16))]:
posix.setgroups(groups)
self.assertListEqual(groups, posix.getgroups())
def test_main():
try:
support.run_unittest(PosixTester, PosixGroupsTester)
finally:
support.reap_children()
if __name__ == '__main__':
test_main()