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Copy pathtest_posix.py
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2393 lines (2090 loc) · 95.9 KB
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"Test posix functions"
from test import support
from test.support import is_apple
from test.support import os_helper
from test.support import warnings_helper
from test.support.script_helper import assert_python_ok
import errno
import sys
import signal
import time
import os
import platform
import stat
import tempfile
import unittest
import warnings
import textwrap
from contextlib import contextmanager
try:
import posix
except ImportError:
import nt as posix
try:
import pwd
except ImportError:
pwd = None
_DUMMY_SYMLINK = os.path.join(tempfile.gettempdir(),
os_helper.TESTFN + '-dummy-symlink')
requires_32b = unittest.skipUnless(
# Emscripten/WASI have 32 bits pointers, but support 64 bits syscall args.
sys.maxsize < 2**32 and not (support.is_emscripten or support.is_wasi),
'test is only meaningful on 32-bit builds'
)
def _supports_sched():
if not hasattr(posix, 'sched_getscheduler'):
return False
try:
posix.sched_getscheduler(0)
except OSError as e:
if e.errno == errno.ENOSYS:
return False
return True
requires_sched = unittest.skipUnless(_supports_sched(), 'requires POSIX scheduler API')
class PosixTester(unittest.TestCase):
def setUp(self):
# create empty file
self.addCleanup(os_helper.unlink, os_helper.TESTFN)
with open(os_helper.TESTFN, "wb"):
pass
self.enterContext(warnings_helper.check_warnings())
warnings.filterwarnings('ignore', '.* potential security risk .*',
RuntimeWarning)
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:
with self.subTest(name):
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()")
@unittest.skipUnless(hasattr(pwd, 'getpwuid'), "test needs pwd.getpwuid()")
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(os_helper.TESTFN)
try:
self.assertTrue(posix.fstatvfs(fp.fileno()))
self.assertTrue(posix.statvfs(fp.fileno()))
finally:
fp.close()
@unittest.skipUnless(hasattr(posix, 'ftruncate'),
'test needs posix.ftruncate()')
def test_ftruncate(self):
fp = open(os_helper.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(os_helper.TESTFN, 'w') as fp:
fp.write('test')
fp.flush()
posix.truncate(os_helper.TESTFN, 0)
@unittest.skipUnless(getattr(os, 'execve', None) in os.supports_fd, "test needs execve() to support the fd parameter")
@support.requires_fork()
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.execve(fp, [sys.executable, '-c', 'pass'], os.environ)
else:
support.wait_process(pid, exitcode=0)
finally:
os.close(fp)
@unittest.skipUnless(hasattr(posix, 'waitid'), "test needs posix.waitid()")
@support.requires_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)
@support.requires_fork()
def test_register_at_fork(self):
with self.assertRaises(TypeError, msg="Positional args not allowed"):
os.register_at_fork(lambda: None)
with self.assertRaises(TypeError, msg="Args must be callable"):
os.register_at_fork(before=2)
with self.assertRaises(TypeError, msg="Args must be callable"):
os.register_at_fork(after_in_child="three")
with self.assertRaises(TypeError, msg="Args must be callable"):
os.register_at_fork(after_in_parent=b"Five")
with self.assertRaises(TypeError, msg="Args must not be None"):
os.register_at_fork(before=None)
with self.assertRaises(TypeError, msg="Args must not be None"):
os.register_at_fork(after_in_child=None)
with self.assertRaises(TypeError, msg="Args must not be None"):
os.register_at_fork(after_in_parent=None)
with self.assertRaises(TypeError, msg="Invalid arg was allowed"):
# Ensure a combination of valid and invalid is an error.
os.register_at_fork(before=None, after_in_parent=lambda: 3)
with self.assertRaises(TypeError, msg="At least one argument is required"):
# when no arg is passed
os.register_at_fork()
with self.assertRaises(TypeError, msg="Invalid arg was allowed"):
# Ensure a combination of valid and invalid is an error.
os.register_at_fork(before=lambda: None, after_in_child='')
# We test actual registrations in their own process so as not to
# pollute this one. There is no way to unregister for cleanup.
code = """if 1:
import os
r, w = os.pipe()
fin_r, fin_w = os.pipe()
os.register_at_fork(before=lambda: os.write(w, b'A'))
os.register_at_fork(after_in_parent=lambda: os.write(w, b'C'))
os.register_at_fork(after_in_child=lambda: os.write(w, b'E'))
os.register_at_fork(before=lambda: os.write(w, b'B'),
after_in_parent=lambda: os.write(w, b'D'),
after_in_child=lambda: os.write(w, b'F'))
pid = os.fork()
if pid == 0:
# At this point, after-forkers have already been executed
os.close(w)
# Wait for parent to tell us to exit
os.read(fin_r, 1)
os._exit(0)
else:
try:
os.close(w)
with open(r, "rb") as f:
data = f.read()
assert len(data) == 6, data
# Check before-fork callbacks
assert data[:2] == b'BA', data
# Check after-fork callbacks
assert sorted(data[2:]) == list(b'CDEF'), data
assert data.index(b'C') < data.index(b'D'), data
assert data.index(b'E') < data.index(b'F'), data
finally:
os.write(fin_w, b'!')
"""
assert_python_ok('-c', code)
@unittest.skipUnless(hasattr(posix, 'lockf'), "test needs posix.lockf()")
def test_lockf(self):
fd = os.open(os_helper.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(os_helper.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() shouldn't disturb the file offset
self.assertEqual(b'te', posix.read(fd, 2))
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'preadv'), "test needs posix.preadv()")
def test_preadv(self):
fd = os.open(os_helper.TESTFN, os.O_RDWR | os.O_CREAT)
try:
os.write(fd, b'test1tt2t3t5t6t6t8')
buf = [bytearray(i) for i in [5, 3, 2]]
self.assertEqual(posix.preadv(fd, buf, 3), 10)
self.assertEqual([b't1tt2', b't3t', b'5t'], list(buf))
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'preadv'), "test needs posix.preadv()")
@unittest.skipUnless(hasattr(posix, 'RWF_HIPRI'), "test needs posix.RWF_HIPRI")
def test_preadv_flags(self):
fd = os.open(os_helper.TESTFN, os.O_RDWR | os.O_CREAT)
try:
os.write(fd, b'test1tt2t3t5t6t6t8')
buf = [bytearray(i) for i in [5, 3, 2]]
self.assertEqual(posix.preadv(fd, buf, 3, os.RWF_HIPRI), 10)
self.assertEqual([b't1tt2', b't3t', b'5t'], list(buf))
except NotImplementedError:
self.skipTest("preadv2 not available")
except OSError as inst:
# Is possible that the macro RWF_HIPRI was defined at compilation time
# but the option is not supported by the kernel or the runtime libc shared
# library.
if inst.errno in {errno.EINVAL, errno.ENOTSUP}:
raise unittest.SkipTest("RWF_HIPRI is not supported by the current system")
else:
raise
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'preadv'), "test needs posix.preadv()")
@requires_32b
def test_preadv_overflow_32bits(self):
fd = os.open(os_helper.TESTFN, os.O_RDWR | os.O_CREAT)
try:
buf = [bytearray(2**16)] * 2**15
with self.assertRaises(OSError) as cm:
os.preadv(fd, buf, 0)
self.assertEqual(cm.exception.errno, errno.EINVAL)
self.assertEqual(bytes(buf[0]), b'\0'* 2**16)
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'pwrite'), "test needs posix.pwrite()")
def test_pwrite(self):
fd = os.open(os_helper.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, 'pwritev'), "test needs posix.pwritev()")
def test_pwritev(self):
fd = os.open(os_helper.TESTFN, os.O_RDWR | os.O_CREAT)
try:
os.write(fd, b"xx")
os.lseek(fd, 0, os.SEEK_SET)
n = os.pwritev(fd, [b'test1', b'tt2', b't3'], 2)
self.assertEqual(n, 10)
os.lseek(fd, 0, os.SEEK_SET)
self.assertEqual(b'xxtest1tt2t3', posix.read(fd, 100))
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'pwritev'), "test needs posix.pwritev()")
@unittest.skipUnless(hasattr(posix, 'os.RWF_SYNC'), "test needs os.RWF_SYNC")
def test_pwritev_flags(self):
fd = os.open(os_helper.TESTFN, os.O_RDWR | os.O_CREAT)
try:
os.write(fd,b"xx")
os.lseek(fd, 0, os.SEEK_SET)
n = os.pwritev(fd, [b'test1', b'tt2', b't3'], 2, os.RWF_SYNC)
self.assertEqual(n, 10)
os.lseek(fd, 0, os.SEEK_SET)
self.assertEqual(b'xxtest1tt2', posix.read(fd, 100))
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'pwritev'), "test needs posix.pwritev()")
@requires_32b
def test_pwritev_overflow_32bits(self):
fd = os.open(os_helper.TESTFN, os.O_RDWR | os.O_CREAT)
try:
with self.assertRaises(OSError) as cm:
os.pwritev(fd, [b"x" * 2**16] * 2**15, 0)
self.assertEqual(cm.exception.errno, errno.EINVAL)
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'posix_fallocate'),
"test needs posix.posix_fallocate()")
def test_posix_fallocate(self):
fd = os.open(os_helper.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.
# issue33655: Also ignore EINVAL on *BSD since ZFS is also
# often used there.
if inst.errno == errno.EINVAL and sys.platform.startswith(
('sunos', 'freebsd', 'netbsd', 'openbsd', 'gnukfreebsd')):
raise unittest.SkipTest("test may fail on ZFS filesystems")
else:
raise
finally:
os.close(fd)
# issue31106 - posix_fallocate() does not set error in errno.
@unittest.skipUnless(hasattr(posix, 'posix_fallocate'),
"test needs posix.posix_fallocate()")
def test_posix_fallocate_errno(self):
try:
posix.posix_fallocate(-42, 0, 10)
except OSError as inst:
if inst.errno != errno.EBADF:
raise
@unittest.skipUnless(hasattr(posix, 'posix_fadvise'),
"test needs posix.posix_fadvise()")
def test_posix_fadvise(self):
fd = os.open(os_helper.TESTFN, os.O_RDONLY)
try:
posix.posix_fadvise(fd, 0, 0, posix.POSIX_FADV_WILLNEED)
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'posix_fadvise'),
"test needs posix.posix_fadvise()")
def test_posix_fadvise_errno(self):
try:
posix.posix_fadvise(-42, 0, 0, posix.POSIX_FADV_WILLNEED)
except OSError as inst:
if inst.errno != errno.EBADF:
raise
@unittest.skipUnless(os.utime in os.supports_fd, "test needs fd support in os.utime")
def test_utime_with_fd(self):
now = time.time()
fd = os.open(os_helper.TESTFN, os.O_RDONLY)
try:
posix.utime(fd)
posix.utime(fd, None)
self.assertRaises(TypeError, posix.utime, fd, (None, None))
self.assertRaises(TypeError, posix.utime, fd, (now, None))
self.assertRaises(TypeError, posix.utime, fd, (None, now))
posix.utime(fd, (int(now), int(now)))
posix.utime(fd, (now, now))
self.assertRaises(ValueError, posix.utime, fd, (now, now), ns=(now, now))
self.assertRaises(ValueError, posix.utime, fd, (now, 0), ns=(None, None))
self.assertRaises(ValueError, posix.utime, fd, (None, None), ns=(now, 0))
posix.utime(fd, (int(now), int((now - int(now)) * 1e9)))
posix.utime(fd, ns=(int(now), int((now - int(now)) * 1e9)))
finally:
os.close(fd)
@unittest.skipUnless(os.utime in os.supports_follow_symlinks, "test needs follow_symlinks support in os.utime")
def test_utime_nofollow_symlinks(self):
now = time.time()
posix.utime(os_helper.TESTFN, None, follow_symlinks=False)
self.assertRaises(TypeError, posix.utime, os_helper.TESTFN,
(None, None), follow_symlinks=False)
self.assertRaises(TypeError, posix.utime, os_helper.TESTFN,
(now, None), follow_symlinks=False)
self.assertRaises(TypeError, posix.utime, os_helper.TESTFN,
(None, now), follow_symlinks=False)
posix.utime(os_helper.TESTFN, (int(now), int(now)),
follow_symlinks=False)
posix.utime(os_helper.TESTFN, (now, now), follow_symlinks=False)
posix.utime(os_helper.TESTFN, follow_symlinks=False)
@unittest.skipUnless(hasattr(posix, 'writev'), "test needs posix.writev()")
def test_writev(self):
fd = os.open(os_helper.TESTFN, os.O_RDWR | os.O_CREAT)
try:
n = os.writev(fd, (b'test1', b'tt2', b't3'))
self.assertEqual(n, 10)
os.lseek(fd, 0, os.SEEK_SET)
self.assertEqual(b'test1tt2t3', posix.read(fd, 10))
# Issue #20113: empty list of buffers should not crash
try:
size = posix.writev(fd, [])
except OSError:
# writev(fd, []) raises OSError(22, "Invalid argument")
# on OpenIndiana
pass
else:
self.assertEqual(size, 0)
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'writev'), "test needs posix.writev()")
@requires_32b
def test_writev_overflow_32bits(self):
fd = os.open(os_helper.TESTFN, os.O_RDWR | os.O_CREAT)
try:
with self.assertRaises(OSError) as cm:
os.writev(fd, [b"x" * 2**16] * 2**15)
self.assertEqual(cm.exception.errno, errno.EINVAL)
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'readv'), "test needs posix.readv()")
def test_readv(self):
fd = os.open(os_helper.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])
# Issue #20113: empty list of buffers should not crash
try:
size = posix.readv(fd, [])
except OSError:
# readv(fd, []) raises OSError(22, "Invalid argument")
# on OpenIndiana
pass
else:
self.assertEqual(size, 0)
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'readv'), "test needs posix.readv()")
@requires_32b
def test_readv_overflow_32bits(self):
fd = os.open(os_helper.TESTFN, os.O_RDWR | os.O_CREAT)
try:
buf = [bytearray(2**16)] * 2**15
with self.assertRaises(OSError) as cm:
os.readv(fd, buf)
self.assertEqual(cm.exception.errno, errno.EINVAL)
self.assertEqual(bytes(buf[0]), b'\0'* 2**16)
finally:
os.close(fd)
@unittest.skipUnless(hasattr(posix, 'dup'),
'test needs posix.dup()')
@unittest.skipIf(support.is_wasi, "WASI does not have dup()")
def test_dup(self):
fp = open(os_helper.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()')
@unittest.skipIf(support.is_apple_mobile, "gh-118201: Test is flaky on iOS")
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()')
@unittest.skipIf(support.is_wasi, "WASI does not have dup2()")
def test_dup2(self):
fp1 = open(os_helper.TESTFN)
fp2 = open(os_helper.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)
@support.requires_subprocess()
def test_oscloexec(self):
fd = os.open(os_helper.TESTFN, os.O_RDONLY|os.O_CLOEXEC)
self.addCleanup(os.close, fd)
self.assertFalse(os.get_inheritable(fd))
@unittest.skipUnless(hasattr(posix, 'O_EXLOCK'),
'test needs posix.O_EXLOCK')
def test_osexlock(self):
fd = os.open(os_helper.TESTFN,
os.O_WRONLY|os.O_EXLOCK|os.O_CREAT)
self.assertRaises(OSError, os.open, os_helper.TESTFN,
os.O_WRONLY|os.O_EXLOCK|os.O_NONBLOCK)
os.close(fd)
if hasattr(posix, "O_SHLOCK"):
fd = os.open(os_helper.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
self.assertRaises(OSError, os.open, os_helper.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(os_helper.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
fd2 = os.open(os_helper.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
os.close(fd2)
os.close(fd1)
if hasattr(posix, "O_EXLOCK"):
fd = os.open(os_helper.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
self.assertRaises(OSError, os.open, os_helper.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(os_helper.TESTFN)
try:
self.assertTrue(posix.fstat(fp.fileno()))
self.assertTrue(posix.stat(fp.fileno()))
self.assertRaisesRegex(TypeError,
'should be string, bytes, os.PathLike or integer, not',
posix.stat, float(fp.fileno()))
finally:
fp.close()
def test_stat(self):
self.assertTrue(posix.stat(os_helper.TESTFN))
self.assertTrue(posix.stat(os.fsencode(os_helper.TESTFN)))
self.assertRaisesRegex(TypeError,
'should be string, bytes, os.PathLike or integer, not',
posix.stat, bytearray(os.fsencode(os_helper.TESTFN)))
self.assertRaisesRegex(TypeError,
'should be string, bytes, os.PathLike or integer, not',
posix.stat, None)
self.assertRaisesRegex(TypeError,
'should be string, bytes, os.PathLike or integer, not',
posix.stat, list(os_helper.TESTFN))
self.assertRaisesRegex(TypeError,
'should be string, bytes, os.PathLike or integer, not',
posix.stat, list(os.fsencode(os_helper.TESTFN)))
@unittest.skipUnless(hasattr(posix, 'mkfifo'), "don't have mkfifo()")
def test_mkfifo(self):
if sys.platform == "vxworks":
fifo_path = os.path.join("/fifos/", os_helper.TESTFN)
else:
fifo_path = os_helper.TESTFN
os_helper.unlink(fifo_path)
self.addCleanup(os_helper.unlink, fifo_path)
try:
posix.mkfifo(fifo_path, stat.S_IRUSR | stat.S_IWUSR)
except PermissionError as e:
self.skipTest('posix.mkfifo(): %s' % e)
self.assertTrue(stat.S_ISFIFO(posix.stat(fifo_path).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).
os_helper.unlink(os_helper.TESTFN)
mode = stat.S_IFIFO | stat.S_IRUSR | stat.S_IWUSR
try:
posix.mknod(os_helper.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, errno.EACCES))
else:
self.assertTrue(stat.S_ISFIFO(posix.stat(os_helper.TESTFN).st_mode))
# Keyword arguments are also supported
os_helper.unlink(os_helper.TESTFN)
try:
posix.mknod(path=os_helper.TESTFN, mode=mode, device=0,
dir_fd=None)
except OSError as e:
self.assertIn(e.errno, (errno.EPERM, errno.EINVAL, errno.EACCES))
@unittest.skipUnless(hasattr(posix, 'makedev'), 'test needs posix.makedev()')
def test_makedev(self):
st = posix.stat(os_helper.TESTFN)
dev = st.st_dev
self.assertIsInstance(dev, int)
self.assertGreaterEqual(dev, 0)
major = posix.major(dev)
self.assertIsInstance(major, int)
self.assertGreaterEqual(major, 0)
self.assertEqual(posix.major(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)
self.assertGreaterEqual(minor, 0)
self.assertEqual(posix.minor(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.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 sys.platform == "vxworks":
# On VxWorks, root user id is 1 and 0 means no login user:
# both are super users.
is_root = (uid in (0, 1))
else:
is_root = (uid == 0)
if support.is_emscripten:
# Emscripten getuid() / geteuid() always return 0 (root), but
# cannot chown uid/gid to random value.
pass
elif is_root:
# 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.)
#
# On VxWorks uid_t is defined as unsigned short. A big
# value greater than 65535 will result in underflow error.
#
# 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 if sys.platform != "vxworks" else 2**15)
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 hasattr(os, 'getgroups'):
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(os, "chown"), "requires os.chown()")
@unittest.skipIf(support.is_emscripten, "getgid() is a stub")
def test_chown(self):
# raise an OSError if the file does not exist
os.unlink(os_helper.TESTFN)
self.assertRaises(OSError, posix.chown, os_helper.TESTFN, -1, -1)
# re-create the file
os_helper.create_empty_file(os_helper.TESTFN)
self._test_all_chown_common(posix.chown, os_helper.TESTFN, posix.stat)
@os_helper.skip_unless_working_chmod
@unittest.skipUnless(hasattr(posix, 'fchown'), "test needs os.fchown()")
@unittest.skipIf(support.is_emscripten, "getgid() is a stub")
def test_fchown(self):
os.unlink(os_helper.TESTFN)
# re-create the file
test_file = open(os_helper.TESTFN, 'w')
try:
fd = test_file.fileno()
self._test_all_chown_common(posix.fchown, fd,
getattr(posix, 'fstat', None))
finally:
test_file.close()
@os_helper.skip_unless_working_chmod
@unittest.skipUnless(hasattr(posix, 'lchown'), "test needs os.lchown()")
def test_lchown(self):
os.unlink(os_helper.TESTFN)
# create a symlink
os.symlink(_DUMMY_SYMLINK, os_helper.TESTFN)
self._test_all_chown_common(posix.lchown, os_helper.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, os_helper.TESTFN)
def test_listdir(self):
self.assertIn(os_helper.TESTFN, posix.listdir(os.curdir))
def test_listdir_default(self):
# When listdir is called without argument,
# it's the same as listdir(os.curdir).
self.assertIn(os_helper.TESTFN, posix.listdir())
def test_listdir_bytes(self):
# When listdir is called with a bytes object,
# the returned strings are of type bytes.
self.assertIn(os.fsencode(os_helper.TESTFN), posix.listdir(b'.'))
def test_listdir_bytes_like(self):
for cls in bytearray, memoryview:
with self.assertRaises(TypeError):
posix.listdir(cls(b'.'))
@unittest.skipUnless(posix.listdir in os.supports_fd,
"test needs fd support for posix.listdir()")
def test_listdir_fd(self):
f = posix.open(posix.getcwd(), posix.O_RDONLY)
self.addCleanup(posix.close, f)
self.assertEqual(
sorted(posix.listdir('.')),
sorted(posix.listdir(f))
)
# Check that the fd offset was reset (issue #13739)
self.assertEqual(
sorted(posix.listdir('.')),
sorted(posix.listdir(f))
)
@unittest.skipUnless(hasattr(posix, 'access'), 'test needs posix.access()')
def test_access(self):
self.assertTrue(posix.access(os_helper.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(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.assertFalse(os.get_inheritable(r))
self.assertFalse(os.get_inheritable(w))
self.assertFalse(os.get_blocking(r))
self.assertFalse(os.get_blocking(w))
# 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
@support.cpython_only
@unittest.skipUnless(hasattr(os, 'pipe2'), "test needs os.pipe2()")
@support.requires_linux_version(2, 6, 27)
def test_pipe2_c_limits(self):
# Issue 15989
import _testcapi
self.assertRaises(OverflowError, os.pipe2, _testcapi.INT_MAX + 1)
self.assertRaises(OverflowError, os.pipe2, _testcapi.UINT_MAX + 1)
@unittest.skipUnless(hasattr(posix, 'utime'), 'test needs posix.utime()')
def test_utime(self):
now = time.time()
posix.utime(os_helper.TESTFN, None)
self.assertRaises(TypeError, posix.utime,
os_helper.TESTFN, (None, None))
self.assertRaises(TypeError, posix.utime,
os_helper.TESTFN, (now, None))
self.assertRaises(TypeError, posix.utime,
os_helper.TESTFN, (None, now))
posix.utime(os_helper.TESTFN, (int(now), int(now)))
posix.utime(os_helper.TESTFN, (now, now))
def check_chmod(self, chmod_func, target, **kwargs):
closefd = not isinstance(target, int)
mode = os.stat(target).st_mode
try:
new_mode = mode & ~(stat.S_IWOTH | stat.S_IWGRP | stat.S_IWUSR)
chmod_func(target, new_mode, **kwargs)
self.assertEqual(os.stat(target).st_mode, new_mode)
if stat.S_ISREG(mode):
try:
with open(target, 'wb+', closefd=closefd):
pass
except PermissionError:
pass
new_mode = mode | (stat.S_IWOTH | stat.S_IWGRP | stat.S_IWUSR)
chmod_func(target, new_mode, **kwargs)
self.assertEqual(os.stat(target).st_mode, new_mode)
if stat.S_ISREG(mode):
with open(target, 'wb+', closefd=closefd):
pass
finally:
chmod_func(target, mode)
@os_helper.skip_unless_working_chmod
def test_chmod_file(self):
self.check_chmod(posix.chmod, os_helper.TESTFN)
def tempdir(self):
target = os_helper.TESTFN + 'd'
posix.mkdir(target)
self.addCleanup(posix.rmdir, target)
return target
@os_helper.skip_unless_working_chmod
def test_chmod_dir(self):
target = self.tempdir()
self.check_chmod(posix.chmod, target)
@os_helper.skip_unless_working_chmod
def test_fchmod_file(self):
with open(os_helper.TESTFN, 'wb+') as f:
self.check_chmod(posix.fchmod, f.fileno())
self.check_chmod(posix.chmod, f.fileno())
@unittest.skipUnless(hasattr(posix, 'lchmod'), 'test needs os.lchmod()')
def test_lchmod_file(self):
self.check_chmod(posix.lchmod, os_helper.TESTFN)
self.check_chmod(posix.chmod, os_helper.TESTFN, follow_symlinks=False)
@unittest.skipUnless(hasattr(posix, 'lchmod'), 'test needs os.lchmod()')
def test_lchmod_dir(self):
target = self.tempdir()
self.check_chmod(posix.lchmod, target)
self.check_chmod(posix.chmod, target, follow_symlinks=False)
def check_chmod_link(self, chmod_func, target, link, **kwargs):
target_mode = os.stat(target).st_mode
link_mode = os.lstat(link).st_mode
try:
new_mode = target_mode & ~(stat.S_IWOTH | stat.S_IWGRP | stat.S_IWUSR)
chmod_func(link, new_mode, **kwargs)
self.assertEqual(os.stat(target).st_mode, new_mode)