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Copy pathtest_posix.py
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2686 lines (2350 loc) · 108 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 copy
import errno
import sys
import signal
import time
import os
import platform
import pickle
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:
# DragonFly BSD requires privileges to use the scheduler API.
if e.errno in (errno.ENOSYS, errno.EPERM):
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. On Cygwin, initgroups(name, 13) does not fail.
if os.getuid() != 0 and sys.platform != 'cygwin':
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', 'openbsd', 'gnukfreebsd')):
raise unittest.SkipTest("test may fail on ZFS filesystems")
elif inst.errno == errno.EOPNOTSUPP:
# ZFS on FreeBSD, FFS on NetBSD, etc.
raise unittest.SkipTest(
"the file system does not support posix_fallocate()")
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()')
def test_confstr(self):
with self.assertRaisesRegex(
ValueError, "unrecognized configuration name"
):
posix.confstr("CS_garbage")
with self.assertRaisesRegex(
TypeError, "configuration names must be strings or integers"
):
posix.confstr(1.23)
path = posix.confstr("CS_PATH")
self.assertGreater(len(path), 0)
self.assertEqual(posix.confstr(posix.confstr_names["CS_PATH"]), path)
@unittest.skipUnless(hasattr(posix, 'sysconf'),
'test needs posix.sysconf()')
def test_sysconf(self):
with self.assertRaisesRegex(
ValueError, "unrecognized configuration name"
):
posix.sysconf("SC_garbage")
with self.assertRaisesRegex(
TypeError, "configuration names must be strings or integers"
):
posix.sysconf(1.23)
arg_max = posix.sysconf("SC_ARG_MAX")
# SC_ARG_MAX is -1 on Cygwin
if sys.platform != 'cygwin':
self.assertGreater(arg_max, 0)
self.assertEqual(
posix.sysconf(posix.sysconf_names["SC_ARG_MAX"]), arg_max)
@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()
@unittest.skipUnless(hasattr(posix, 'stat'),
'test needs posix.stat()')
@unittest.skipUnless(os.stat in os.supports_follow_symlinks,
'test needs follow_symlinks support in os.stat()')
def test_stat_fd_zero_follow_symlinks(self):
with self.assertRaisesRegex(ValueError,
'cannot use fd and follow_symlinks together'):
posix.stat(0, follow_symlinks=False)
with self.assertRaisesRegex(ValueError,
'cannot use fd and follow_symlinks together'):
posix.stat(1, follow_symlinks=False)
def check_statlike_path(self, func):
self.assertTrue(func(os_helper.TESTFN))
self.assertTrue(func(os.fsencode(os_helper.TESTFN)))
self.assertTrue(func(os_helper.FakePath(os_helper.TESTFN)))
self.assertRaisesRegex(TypeError,
'should be string, bytes, os.PathLike or integer, not',
func, bytearray(os.fsencode(os_helper.TESTFN)))
self.assertRaisesRegex(TypeError,
'should be string, bytes, os.PathLike or integer, not',
func, None)
self.assertRaisesRegex(TypeError,
'should be string, bytes, os.PathLike or integer, not',
func, list(os_helper.TESTFN))
self.assertRaisesRegex(TypeError,
'should be string, bytes, os.PathLike or integer, not',
func, list(os.fsencode(os_helper.TESTFN)))
def test_stat(self):
self.check_statlike_path(posix.stat)
@unittest.skipUnless(hasattr(posix, 'statx'), 'test needs posix.statx()')
def test_statx(self):
def func(path, **kwargs):
return posix.statx(path, posix.STATX_BASIC_STATS, **kwargs)
self.check_statlike_path(func)
@unittest.skipUnless(hasattr(posix, 'statx'), 'test needs posix.statx()')
def test_statx_flags(self):
# glibc's fallback implementation of statx via the stat family fails
# with EINVAL on the (nonzero) sync flags. If you see this failure,
# update your kernel and/or seccomp syscall filter.
valid_flag_names = ('AT_NO_AUTOMOUNT', 'AT_STATX_SYNC_AS_STAT',
'AT_STATX_FORCE_SYNC', 'AT_STATX_DONT_SYNC')
for flag_name in valid_flag_names:
flag = getattr(posix, flag_name)
with self.subTest(msg=flag_name, flags=flag):
posix.statx(os_helper.TESTFN, posix.STATX_BASIC_STATS,
flags=flag)
# These flags are not exposed to Python because their functionality is
# implemented via kwargs instead.
kwarg_equivalent_flags = (
(0x0100, 'AT_SYMLINK_NOFOLLOW', 'follow_symlinks'),
(0x0400, 'AT_SYMLINK_FOLLOW', 'follow_symlinks'),
(0x1000, 'AT_EMPTY_PATH', 'dir_fd'),
)
for flag, flag_name, kwarg_name in kwarg_equivalent_flags:
with self.subTest(msg=flag_name, flags=flag):
with self.assertRaisesRegex(ValueError, kwarg_name):
posix.statx(os_helper.TESTFN, posix.STATX_BASIC_STATS,
flags=flag)
with self.subTest(msg="AT_STATX_FORCE_SYNC | AT_STATX_DONT_SYNC"):
with self.assertRaises(OSError) as ctx:
flags = posix.AT_STATX_FORCE_SYNC | posix.AT_STATX_DONT_SYNC
posix.statx(os_helper.TESTFN, posix.STATX_BASIC_STATS,
flags=flags)
self.assertEqual(ctx.exception.errno, errno.EINVAL)
@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)
for x in -2, 2**64, -2**63-1:
self.assertRaises((ValueError, OverflowError), posix.major, x)
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)
for x in -2, 2**64, -2**63-1:
self.assertRaises((ValueError, OverflowError), posix.minor, x)
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)
for x in -2, 2**32, 2**64, -2**63-1:
self.assertRaises((ValueError, OverflowError), posix.makedev, x, minor)
self.assertRaises((ValueError, OverflowError), posix.makedev, major, x)
# The following tests are needed to test functions accepting or
# returning the special value NODEV (if it is defined). major(), minor()
# and makefile() are the only easily reproducible examples, but that
# behavior is platform specific -- on some platforms their code has
# a special case for NODEV, on others this is just an implementation
# artifact.
if (hasattr(posix, 'NODEV') and
sys.platform.startswith(('linux', 'macos', 'freebsd', 'sunos'))):
NODEV = posix.NODEV
self.assertEqual(posix.major(NODEV), NODEV)
self.assertEqual(posix.minor(NODEV), NODEV)
self.assertEqual(posix.makedev(NODEV, NODEV), NODEV)
def test_nodev(self):
# NODEV is not a part of Posix, but is defined on many systems.
if (not hasattr(posix, 'NODEV')
and (not sys.platform.startswith(('linux', 'macos', 'freebsd',
'dragonfly', 'netbsd', 'openbsd',
'sunos'))
or support.linked_to_musl())):
self.skipTest('not defined on this platform')
self.assertHasAttr(posix, 'NODEV')
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'):
# Also check the effective gid, which the kernel
# accepts for chown even if not in getgroups().
if 0 not in os.getgroups() and os.getegid() != 0:
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)