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cpython/Lib/test/test_posix.py

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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()')
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)
self.assertEqual(os.lstat(link).st_mode, link_mode)
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)
self.assertEqual(os.lstat(link).st_mode, link_mode)
finally:
posix.chmod(target, target_mode)
def check_lchmod_link(self, chmod_func, target, link, **kwargs):
target_mode = os.stat(target).st_mode
link_mode = os.lstat(link).st_mode
new_mode = link_mode & ~(stat.S_IWOTH | stat.S_IWGRP | stat.S_IWUSR)
chmod_func(link, new_mode, **kwargs)
self.assertEqual(os.stat(target).st_mode, target_mode)
self.assertEqual(os.lstat(link).st_mode, new_mode)
new_mode = link_mode | (stat.S_IWOTH | stat.S_IWGRP | stat.S_IWUSR)
chmod_func(link, new_mode, **kwargs)
self.assertEqual(os.stat(target).st_mode, target_mode)
self.assertEqual(os.lstat(link).st_mode, new_mode)
@os_helper.skip_unless_symlink
def test_chmod_file_symlink(self):
target = os_helper.TESTFN
link = os_helper.TESTFN + '-link'
os.symlink(target, link)
self.addCleanup(posix.unlink, link)
if os.name == 'nt':
self.check_lchmod_link(posix.chmod, target, link)
else:
self.check_chmod_link(posix.chmod, target, link)
self.check_chmod_link(posix.chmod, target, link, follow_symlinks=True)
@os_helper.skip_unless_symlink
def test_chmod_dir_symlink(self):
target = self.tempdir()
link = os_helper.TESTFN + '-link'
os.symlink(target, link, target_is_directory=True)
self.addCleanup(posix.unlink, link)
if os.name == 'nt':
self.check_lchmod_link(posix.chmod, target, link)
else:
self.check_chmod_link(posix.chmod, target, link)
self.check_chmod_link(posix.chmod, target, link, follow_symlinks=True)
@unittest.skipUnless(hasattr(posix, 'lchmod'), 'test needs os.lchmod()')
@os_helper.skip_unless_symlink
def test_lchmod_file_symlink(self):
target = os_helper.TESTFN
link = os_helper.TESTFN + '-link'
os.symlink(target, link)
self.addCleanup(posix.unlink, link)
self.check_lchmod_link(posix.chmod, target, link, follow_symlinks=False)
self.check_lchmod_link(posix.lchmod, target, link)
@unittest.skipUnless(hasattr(posix, 'lchmod'), 'test needs os.lchmod()')
@os_helper.skip_unless_symlink
def test_lchmod_dir_symlink(self):
target = self.tempdir()
link = os_helper.TESTFN + '-link'
os.symlink(target, link)
self.addCleanup(posix.unlink, link)
self.check_lchmod_link(posix.chmod, target, link, follow_symlinks=False)
self.check_lchmod_link(posix.lchmod, target, link)
def _test_chflags_regular_file(self, chflags_func, target_file, **kwargs):
st = os.stat(target_file)
self.assertTrue(hasattr(st, 'st_flags'))
# ZFS returns EOPNOTSUPP when attempting to set flag UF_IMMUTABLE.
flags = st.st_flags | stat.UF_IMMUTABLE
try:
chflags_func(target_file, flags, **kwargs)
except OSError as err:
if err.errno != errno.EOPNOTSUPP:
raise
msg = 'chflag UF_IMMUTABLE not supported by underlying fs'
self.skipTest(msg)
try:
new_st = os.stat(target_file)
self.assertEqual(st.st_flags | stat.UF_IMMUTABLE, new_st.st_flags)
try:
fd = open(target_file, 'w+')
except OSError 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, os_helper.TESTFN)
@unittest.skipUnless(hasattr(posix, 'lchflags'), 'test needs os.lchflags()')
def test_lchflags_regular_file(self):
self._test_chflags_regular_file(posix.lchflags, os_helper.TESTFN)
self._test_chflags_regular_file(posix.chflags, os_helper.TESTFN,
follow_symlinks=False)
@unittest.skipUnless(hasattr(posix, 'lchflags'), 'test needs os.lchflags()')
def test_lchflags_symlink(self):
testfn_st = os.stat(os_helper.TESTFN)
self.assertTrue(hasattr(testfn_st, 'st_flags'))
self.addCleanup(os_helper.unlink, _DUMMY_SYMLINK)
os.symlink(os_helper.TESTFN, _DUMMY_SYMLINK)
dummy_symlink_st = os.lstat(_DUMMY_SYMLINK)
def chflags_nofollow(path, flags):
return posix.chflags(path, flags, follow_symlinks=False)
for fn in (posix.lchflags, chflags_nofollow):
# ZFS returns EOPNOTSUPP when attempting to set flag UF_IMMUTABLE.
flags = dummy_symlink_st.st_flags | stat.UF_IMMUTABLE
try:
fn(_DUMMY_SYMLINK, flags)
except OSError as err:
if err.errno != errno.EOPNOTSUPP:
raise
msg = 'chflag UF_IMMUTABLE not supported by underlying fs'
self.skipTest(msg)
try:
new_testfn_st = os.stat(os_helper.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:
fn(_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_putenv(self):
with self.assertRaises(ValueError):
os.putenv('FRUIT\0VEGETABLE', 'cabbage')
with self.assertRaises(ValueError):
os.putenv('FRUIT', 'orange\0VEGETABLE=cabbage')
with self.assertRaises(ValueError):
os.putenv('FRUIT=ORANGE', 'lemon')
if os.name == 'posix':
with self.assertRaises(ValueError):
os.putenv(b'FRUIT\0VEGETABLE', b'cabbage')
with self.assertRaises(ValueError):
os.putenv(b'FRUIT', b'orange\0VEGETABLE=cabbage')
with self.assertRaises(ValueError):
os.putenv(b'FRUIT=ORANGE', b'lemon')
@unittest.skipUnless(hasattr(posix, 'getcwd'), 'test needs posix.getcwd()')
def test_getcwd_long_pathnames(self):
dirname = 'getcwd-test-directory-0123456789abcdef-01234567890abcdef'
curdir = os.getcwd()
base_path = os.path.abspath(os_helper.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)
os_helper.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):
user = pwd.getpwuid(os.getuid())[0]
group = pwd.getpwuid(os.getuid())[3]
self.assertIn(group, posix.getgrouplist(user, group))
@unittest.skipUnless(hasattr(os, 'getegid'), "test needs os.getegid()")
@unittest.skipUnless(hasattr(os, 'popen'), "test needs os.popen()")
@support.requires_subprocess()
def test_getgroups(self):
with os.popen('id -G 2>/dev/null') as idg:
groups = idg.read().strip()
ret = idg.close()
try:
idg_groups = set(int(g) for g in groups.split())
except ValueError:
idg_groups = set()
if ret is not None or not idg_groups:
raise unittest.SkipTest("need working 'id -G'")
# Issues 16698: OS X ABIs prior to 10.6 have limits on getgroups()
if sys.platform == 'darwin':
import sysconfig
dt = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET') or '10.3'
if tuple(int(n) for n in dt.split('.')[0:2]) < (10, 6):
raise unittest.SkipTest("getgroups(2) is broken prior to 10.6")
# 'id -G' and 'os.getgroups()' should return the same
# groups, ignoring order, duplicates, and the effective gid.
# #10822/#26944 - It is implementation defined whether
# posix.getgroups() includes the effective gid.
symdiff = idg_groups.symmetric_difference(posix.getgroups())
self.assertTrue(not symdiff or symdiff == {posix.getegid()})
@unittest.skipUnless(hasattr(signal, 'SIGCHLD'), 'CLD_XXXX be placed in si_code for a SIGCHLD signal')
@unittest.skipUnless(hasattr(os, 'waitid_result'), "test needs os.waitid_result")
def test_cld_xxxx_constants(self):
os.CLD_EXITED
os.CLD_KILLED
os.CLD_DUMPED
os.CLD_TRAPPED
os.CLD_STOPPED
os.CLD_CONTINUED
requires_sched_h = unittest.skipUnless(hasattr(posix, 'sched_yield'),
"don't have scheduling support")
requires_sched_affinity = unittest.skipUnless(hasattr(posix, 'sched_setaffinity'),
"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)
# Apple plaforms return 15 without checking the argument.
if not is_apple:
self.assertRaises(OSError, posix.sched_get_priority_min, -23)
self.assertRaises(OSError, posix.sched_get_priority_max, -23)
@requires_sched
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:
parent = posix.sched_getscheduler(os.getppid())
except OSError as e:
if e.errno != errno.EPERM:
raise
else:
self.assertIn(parent, 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)
# POSIX states that calling sched_setparam() or sched_setscheduler() on
# a process with a scheduling policy other than SCHED_FIFO or SCHED_RR
# is implementation-defined: NetBSD and FreeBSD can return EINVAL.
if not sys.platform.startswith(('freebsd', 'netbsd')):
try:
posix.sched_setscheduler(0, mine, param)
posix.sched_setparam(0, param)
except OSError as e:
if e.errno != errno.EPERM:
raise
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_getaffinity(self):
mask = posix.sched_getaffinity(0)
self.assertIsInstance(mask, set)
self.assertGreaterEqual(len(mask), 1)
if not sys.platform.startswith("freebsd"):
# bpo-47205: does not raise OSError on FreeBSD
self.assertRaises(OSError, posix.sched_getaffinity, -1)
for cpu in mask:
self.assertIsInstance(cpu, int)
self.assertGreaterEqual(cpu, 0)
self.assertLess(cpu, 1 << 32)
@requires_sched_affinity
def test_sched_setaffinity(self):
mask = posix.sched_getaffinity(0)
self.addCleanup(posix.sched_setaffinity, 0, list(mask))
if len(mask) > 1:
# Empty masks are forbidden
mask.pop()
posix.sched_setaffinity(0, mask)
self.assertEqual(posix.sched_getaffinity(0), mask)
self.assertRaises(OSError, posix.sched_setaffinity, 0, [])
self.assertRaises(ValueError, posix.sched_setaffinity, 0, [-10])
self.assertRaises(ValueError, posix.sched_setaffinity, 0, map(int, "0X"))
self.assertRaises(OverflowError, posix.sched_setaffinity, 0, [1<<128])
if not sys.platform.startswith("freebsd"):
# bpo-47205: does not raise OSError on FreeBSD
self.assertRaises(OSError, posix.sched_setaffinity, -1, mask)
@unittest.skipIf(support.is_wasi, "No dynamic linking on WASI")
@unittest.skipUnless(os.name == 'posix', "POSIX-only test")
def test_rtld_constants(self):
# check presence of major RTLD_* constants
posix.RTLD_LAZY
posix.RTLD_NOW
posix.RTLD_GLOBAL
posix.RTLD_LOCAL
@unittest.skipUnless(hasattr(os, 'SEEK_HOLE'),
"test needs an OS that reports file holes")
def test_fs_holes(self):
# Even if the filesystem doesn't report holes,
# if the OS supports it the SEEK_* constants
# will be defined and will have a consistent
# behaviour:
# os.SEEK_DATA = current position
# os.SEEK_HOLE = end of file position
with open(os_helper.TESTFN, 'r+b') as fp:
fp.write(b"hello")
fp.flush()
size = fp.tell()
fno = fp.fileno()
try :
for i in range(size):
self.assertEqual(i, os.lseek(fno, i, os.SEEK_DATA))
self.assertLessEqual(size, os.lseek(fno, i, os.SEEK_HOLE))
self.assertRaises(OSError, os.lseek, fno, size, os.SEEK_DATA)
self.assertRaises(OSError, os.lseek, fno, size, os.SEEK_HOLE)
except OSError :
# Some OSs claim to support SEEK_HOLE/SEEK_DATA
# but it is not true.
# For instance:
# http://lists.freebsd.org/pipermail/freebsd-amd64/2012-January/014332.html
raise unittest.SkipTest("OSError raised!")
def test_path_error2(self):
"""
Test functions that call path_error2(), providing two filenames in their exceptions.
"""
for name in ("rename", "replace", "link"):
function = getattr(os, name, None)
if function is None:
continue
for dst in ("noodly2", os_helper.TESTFN):
try:
function('doesnotexistfilename', dst)
except OSError as e:
self.assertIn("'doesnotexistfilename' -> '{}'".format(dst), str(e))
break
else:
self.fail("No valid path_error2() test for os." + name)
def test_path_with_null_character(self):
fn = os_helper.TESTFN
fn_with_NUL = fn + '\0'
self.addCleanup(os_helper.unlink, fn)
os_helper.unlink(fn)
fd = None
try:
with self.assertRaises(ValueError):
fd = os.open(fn_with_NUL, os.O_WRONLY | os.O_CREAT) # raises
finally:
if fd is not None:
os.close(fd)
self.assertFalse(os.path.exists(fn))
self.assertRaises(ValueError, os.mkdir, fn_with_NUL)
self.assertFalse(os.path.exists(fn))
open(fn, 'wb').close()
self.assertRaises(ValueError, os.stat, fn_with_NUL)
def test_path_with_null_byte(self):
fn = os.fsencode(os_helper.TESTFN)
fn_with_NUL = fn + b'\0'
self.addCleanup(os_helper.unlink, fn)
os_helper.unlink(fn)
fd = None
try:
with self.assertRaises(ValueError):
fd = os.open(fn_with_NUL, os.O_WRONLY | os.O_CREAT) # raises
finally:
if fd is not None:
os.close(fd)
self.assertFalse(os.path.exists(fn))
self.assertRaises(ValueError, os.mkdir, fn_with_NUL)
self.assertFalse(os.path.exists(fn))
open(fn, 'wb').close()
self.assertRaises(ValueError, os.stat, fn_with_NUL)
@unittest.skipUnless(hasattr(os, "pidfd_open"), "pidfd_open unavailable")
def test_pidfd_open(self):
with self.assertRaises(OSError) as cm:
os.pidfd_open(-1)
if cm.exception.errno == errno.ENOSYS:
self.skipTest("system does not support pidfd_open")
if isinstance(cm.exception, PermissionError):
self.skipTest(f"pidfd_open syscall blocked: {cm.exception!r}")
self.assertEqual(cm.exception.errno, errno.EINVAL)
os.close(os.pidfd_open(os.getpid(), 0))
# tests for the posix *at functions follow
class TestPosixDirFd(unittest.TestCase):
count = 0
@contextmanager
def prepare(self):
TestPosixDirFd.count += 1
name = f'{os_helper.TESTFN}_{self.count}'
base_dir = f'{os_helper.TESTFN}_{self.count}base'
posix.mkdir(base_dir)
self.addCleanup(posix.rmdir, base_dir)
fullname = os.path.join(base_dir, name)
assert not os.path.exists(fullname)
with os_helper.open_dir_fd(base_dir) as dir_fd:
yield (dir_fd, name, fullname)
@contextmanager
def prepare_file(self):
with self.prepare() as (dir_fd, name, fullname):
os_helper.create_empty_file(fullname)
self.addCleanup(posix.unlink, fullname)
yield (dir_fd, name, fullname)
@unittest.skipUnless(os.access in os.supports_dir_fd, "test needs dir_fd support for os.access()")
def test_access_dir_fd(self):
with self.prepare_file() as (dir_fd, name, fullname):
self.assertTrue(posix.access(name, os.R_OK, dir_fd=dir_fd))
@unittest.skipUnless(os.chmod in os.supports_dir_fd, "test needs dir_fd support in os.chmod()")
def test_chmod_dir_fd(self):
with self.prepare_file() as (dir_fd, name, fullname):
posix.chmod(fullname, stat.S_IRUSR)
posix.chmod(name, stat.S_IRUSR | stat.S_IWUSR, dir_fd=dir_fd)
s = posix.stat(fullname)
self.assertEqual(s.st_mode & stat.S_IRWXU,
stat.S_IRUSR | stat.S_IWUSR)
@unittest.skipUnless(hasattr(os, 'chown') and (os.chown in os.supports_dir_fd),
"test needs dir_fd support in os.chown()")
@unittest.skipIf(support.is_emscripten, "getgid() is a stub")
def test_chown_dir_fd(self):
with self.prepare_file() as (dir_fd, name, fullname):
posix.chown(name, os.getuid(), os.getgid(), dir_fd=dir_fd)
@unittest.skipUnless(os.stat in os.supports_dir_fd, "test needs dir_fd support in os.stat()")
def test_stat_dir_fd(self):
with self.prepare() as (dir_fd, name, fullname):
with open(fullname, 'w') as outfile:
outfile.write("testline\n")
self.addCleanup(posix.unlink, fullname)
s1 = posix.stat(fullname)
s2 = posix.stat(name, dir_fd=dir_fd)
self.assertEqual(s1, s2)
s2 = posix.stat(fullname, dir_fd=None)
self.assertEqual(s1, s2)
self.assertRaisesRegex(TypeError, 'should be integer or None, not',
posix.stat, name, dir_fd=posix.getcwd())
self.assertRaisesRegex(TypeError, 'should be integer or None, not',
posix.stat, name, dir_fd=float(dir_fd))
self.assertRaises(OverflowError,
posix.stat, name, dir_fd=10**20)
for fd in False, True:
with self.assertWarnsRegex(RuntimeWarning,
'bool is used as a file descriptor') as cm:
with self.assertRaises(OSError):
posix.stat('nonexisting', dir_fd=fd)
self.assertEqual(cm.filename, __file__)
@unittest.skipUnless(os.utime in os.supports_dir_fd, "test needs dir_fd support in os.utime()")
def test_utime_dir_fd(self):
with self.prepare_file() as (dir_fd, name, fullname):
now = time.time()
posix.utime(name, None, dir_fd=dir_fd)
posix.utime(name, dir_fd=dir_fd)
self.assertRaises(TypeError, posix.utime, name,
now, dir_fd=dir_fd)
self.assertRaises(TypeError, posix.utime, name,
(None, None), dir_fd=dir_fd)
self.assertRaises(TypeError, posix.utime, name,
(now, None), dir_fd=dir_fd)
self.assertRaises(TypeError, posix.utime, name,
(None, now), dir_fd=dir_fd)
self.assertRaises(TypeError, posix.utime, name,
(now, "x"), dir_fd=dir_fd)
posix.utime(name, (int(now), int(now)), dir_fd=dir_fd)
posix.utime(name, (now, now), dir_fd=dir_fd)
posix.utime(name,
(int(now), int((now - int(now)) * 1e9)), dir_fd=dir_fd)
posix.utime(name, dir_fd=dir_fd,
times=(int(now), int((now - int(now)) * 1e9)))
# try dir_fd and follow_symlinks together
if os.utime in os.supports_follow_symlinks:
try:
posix.utime(name, follow_symlinks=False, dir_fd=dir_fd)
except ValueError:
# whoops! using both together not supported on this platform.
pass
@unittest.skipIf(
support.is_wasi,
"WASI: symlink following on path_link is not supported"
)
@unittest.skipUnless(
hasattr(os, "link") and os.link in os.supports_dir_fd,
"test needs dir_fd support in os.link()"
)
def test_link_dir_fd(self):
with self.prepare_file() as (dir_fd, name, fullname), \
self.prepare() as (dir_fd2, linkname, fulllinkname):
try:
posix.link(name, linkname, src_dir_fd=dir_fd, dst_dir_fd=dir_fd2)
except PermissionError as e:
self.skipTest('posix.link(): %s' % e)
self.addCleanup(posix.unlink, fulllinkname)
# should have same inodes
self.assertEqual(posix.stat(fullname)[1],
posix.stat(fulllinkname)[1])
@unittest.skipUnless(os.mkdir in os.supports_dir_fd, "test needs dir_fd support in os.mkdir()")
def test_mkdir_dir_fd(self):
with self.prepare() as (dir_fd, name, fullname):
posix.mkdir(name, dir_fd=dir_fd)
self.addCleanup(posix.rmdir, fullname)
posix.stat(fullname) # should not raise exception
@unittest.skipUnless(hasattr(os, 'mknod')
and (os.mknod in os.supports_dir_fd)
and hasattr(stat, 'S_IFIFO'),
"test requires both stat.S_IFIFO and dir_fd support for os.mknod()")
def test_mknod_dir_fd(self):
# Test using mknodat() to create a FIFO (the only use specified
# by POSIX).
with self.prepare() as (dir_fd, name, fullname):
mode = stat.S_IFIFO | stat.S_IRUSR | stat.S_IWUSR
try:
posix.mknod(name, mode, 0, dir_fd=dir_fd)
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.addCleanup(posix.unlink, fullname)
self.assertTrue(stat.S_ISFIFO(posix.stat(fullname).st_mode))
@unittest.skipUnless(os.open in os.supports_dir_fd, "test needs dir_fd support in os.open()")
def test_open_dir_fd(self):
with self.prepare() as (dir_fd, name, fullname):
with open(fullname, 'wb') as outfile:
outfile.write(b"testline\n")
self.addCleanup(posix.unlink, fullname)
fd = posix.open(name, posix.O_RDONLY, dir_fd=dir_fd)
try:
res = posix.read(fd, 9)
self.assertEqual(b"testline\n", res)
finally:
posix.close(fd)
@unittest.skipUnless(hasattr(os, 'readlink') and (os.readlink in os.supports_dir_fd),
"test needs dir_fd support in os.readlink()")
def test_readlink_dir_fd(self):
with self.prepare() as (dir_fd, name, fullname):
os.symlink('symlink', fullname)
self.addCleanup(posix.unlink, fullname)
self.assertEqual(posix.readlink(name, dir_fd=dir_fd), 'symlink')
@unittest.skipUnless(os.rename in os.supports_dir_fd, "test needs dir_fd support in os.rename()")
def test_rename_dir_fd(self):
with self.prepare_file() as (dir_fd, name, fullname), \
self.prepare() as (dir_fd2, name2, fullname2):
posix.rename(name, name2,
src_dir_fd=dir_fd, dst_dir_fd=dir_fd2)
posix.stat(fullname2) # should not raise exception
posix.rename(fullname2, fullname)
@unittest.skipUnless(os.symlink in os.supports_dir_fd, "test needs dir_fd support in os.symlink()")
def test_symlink_dir_fd(self):
with self.prepare() as (dir_fd, name, fullname):
posix.symlink('symlink', name, dir_fd=dir_fd)
self.addCleanup(posix.unlink, fullname)
self.assertEqual(posix.readlink(fullname), 'symlink')
@unittest.skipUnless(os.unlink in os.supports_dir_fd, "test needs dir_fd support in os.unlink()")
def test_unlink_dir_fd(self):
with self.prepare() as (dir_fd, name, fullname):
os_helper.create_empty_file(fullname)
posix.stat(fullname) # should not raise exception
try:
posix.unlink(name, dir_fd=dir_fd)
self.assertRaises(OSError, posix.stat, fullname)
except:
self.addCleanup(posix.unlink, fullname)
raise
@unittest.skipUnless(hasattr(os, 'mkfifo') and os.mkfifo in os.supports_dir_fd, "test needs dir_fd support in os.mkfifo()")
def test_mkfifo_dir_fd(self):
with self.prepare() as (dir_fd, name, fullname):
try:
posix.mkfifo(name, stat.S_IRUSR | stat.S_IWUSR, dir_fd=dir_fd)
except PermissionError as e:
self.skipTest('posix.mkfifo(): %s' % e)
self.addCleanup(posix.unlink, fullname)
self.assertTrue(stat.S_ISFIFO(posix.stat(fullname).st_mode))
class PosixGroupsTester(unittest.TestCase):
def setUp(self):
if posix.getuid() != 0:
raise unittest.SkipTest("not enough privileges")
if not hasattr(posix, 'getgroups'):
raise unittest.SkipTest("need posix.getgroups")
if sys.platform == 'darwin':
raise unittest.SkipTest("getgroups(2) is broken on OSX")
self.saved_groups = posix.getgroups()
def tearDown(self):
if hasattr(posix, 'setgroups'):
posix.setgroups(self.saved_groups)
elif hasattr(posix, 'initgroups'):
name = pwd.getpwuid(posix.getuid()).pw_name
posix.initgroups(name, self.saved_groups[0])
@unittest.skipUnless(hasattr(posix, 'initgroups'),
"test needs posix.initgroups()")
def test_initgroups(self):
# find missing group
g = max(self.saved_groups or [0]) + 1
name = pwd.getpwuid(posix.getuid()).pw_name
posix.initgroups(name, g)
self.assertIn(g, posix.getgroups())
@unittest.skipUnless(hasattr(posix, 'setgroups'),
"test needs posix.setgroups()")
def test_setgroups(self):
for groups in [[0], list(range(16))]:
posix.setgroups(groups)
self.assertListEqual(groups, posix.getgroups())
class _PosixSpawnMixin:
# Program which does nothing and exits with status 0 (success)
NOOP_PROGRAM = (sys.executable, '-I', '-S', '-c', 'pass')
spawn_func = None
def python_args(self, *args):
# Disable site module to avoid side effects. For example,
# on Fedora 28, if the HOME environment variable is not set,
# site._getuserbase() calls pwd.getpwuid() which opens
# /var/lib/sss/mc/passwd but then leaves the file open which makes
# test_close_file() to fail.
return (sys.executable, '-I', '-S', *args)
def test_returns_pid(self):
pidfile = os_helper.TESTFN
self.addCleanup(os_helper.unlink, pidfile)
script = f"""if 1:
import os
with open({pidfile!r}, "w") as pidfile:
pidfile.write(str(os.getpid()))
"""
args = self.python_args('-c', script)
pid = self.spawn_func(args[0], args, os.environ)
support.wait_process(pid, exitcode=0)
with open(pidfile, encoding="utf-8") as f:
self.assertEqual(f.read(), str(pid))
def test_no_such_executable(self):
no_such_executable = 'no_such_executable'
try:
pid = self.spawn_func(no_such_executable,
[no_such_executable],
os.environ)
# bpo-35794: PermissionError can be raised if there are
# directories in the $PATH that are not accessible.
except (FileNotFoundError, PermissionError) as exc:
self.assertEqual(exc.filename, no_such_executable)
else:
pid2, status = os.waitpid(pid, 0)
self.assertEqual(pid2, pid)
self.assertNotEqual(status, 0)
def test_specify_environment(self):
envfile = os_helper.TESTFN
self.addCleanup(os_helper.unlink, envfile)
script = f"""if 1:
import os
with open({envfile!r}, "w", encoding="utf-8") as envfile:
envfile.write(os.environ['foo'])
"""
args = self.python_args('-c', script)
pid = self.spawn_func(args[0], args,
{**os.environ, 'foo': 'bar'})
support.wait_process(pid, exitcode=0)
with open(envfile, encoding="utf-8") as f:
self.assertEqual(f.read(), 'bar')
def test_none_file_actions(self):
pid = self.spawn_func(
self.NOOP_PROGRAM[0],
self.NOOP_PROGRAM,
os.environ,
file_actions=None
)
support.wait_process(pid, exitcode=0)
def test_empty_file_actions(self):
pid = self.spawn_func(
self.NOOP_PROGRAM[0],
self.NOOP_PROGRAM,
os.environ,
file_actions=[]
)
support.wait_process(pid, exitcode=0)
def test_resetids_explicit_default(self):
pid = self.spawn_func(
sys.executable,
[sys.executable, '-c', 'pass'],
os.environ,
resetids=False
)
support.wait_process(pid, exitcode=0)
def test_resetids(self):
pid = self.spawn_func(
sys.executable,
[sys.executable, '-c', 'pass'],
os.environ,
resetids=True
)
support.wait_process(pid, exitcode=0)
def test_setpgroup(self):
pid = self.spawn_func(
sys.executable,
[sys.executable, '-c', 'pass'],
os.environ,
setpgroup=os.getpgrp()
)
support.wait_process(pid, exitcode=0)
def test_setpgroup_wrong_type(self):
with self.assertRaises(TypeError):
self.spawn_func(sys.executable,
[sys.executable, "-c", "pass"],
os.environ, setpgroup="023")
@unittest.skipUnless(hasattr(signal, 'pthread_sigmask'),
'need signal.pthread_sigmask()')
def test_setsigmask(self):
code = textwrap.dedent("""\
import signal
signal.raise_signal(signal.SIGUSR1)""")
pid = self.spawn_func(
sys.executable,
[sys.executable, '-c', code],
os.environ,
setsigmask=[signal.SIGUSR1]
)
support.wait_process(pid, exitcode=0)
def test_setsigmask_wrong_type(self):
with self.assertRaises(TypeError):
self.spawn_func(sys.executable,
[sys.executable, "-c", "pass"],
os.environ, setsigmask=34)
with self.assertRaises(TypeError):
self.spawn_func(sys.executable,
[sys.executable, "-c", "pass"],
os.environ, setsigmask=["j"])
with self.assertRaises(ValueError):
self.spawn_func(sys.executable,
[sys.executable, "-c", "pass"],
os.environ, setsigmask=[signal.NSIG,
signal.NSIG+1])
def test_setsid(self):
rfd, wfd = os.pipe()
self.addCleanup(os.close, rfd)
try:
os.set_inheritable(wfd, True)
code = textwrap.dedent(f"""
import os
fd = {wfd}
sid = os.getsid(0)
os.write(fd, str(sid).encode())
""")
try:
pid = self.spawn_func(sys.executable,
[sys.executable, "-c", code],
os.environ, setsid=True)
except NotImplementedError as exc:
self.skipTest(f"setsid is not supported: {exc!r}")
except PermissionError as exc:
self.skipTest(f"setsid failed with: {exc!r}")
finally:
os.close(wfd)
support.wait_process(pid, exitcode=0)
output = os.read(rfd, 100)
child_sid = int(output)
parent_sid = os.getsid(os.getpid())
self.assertNotEqual(parent_sid, child_sid)
@unittest.skipUnless(hasattr(signal, 'pthread_sigmask'),
'need signal.pthread_sigmask()')
def test_setsigdef(self):
original_handler = signal.signal(signal.SIGUSR1, signal.SIG_IGN)
code = textwrap.dedent("""\
import signal
signal.raise_signal(signal.SIGUSR1)""")
try:
pid = self.spawn_func(
sys.executable,
[sys.executable, '-c', code],
os.environ,
setsigdef=[signal.SIGUSR1]
)
finally:
signal.signal(signal.SIGUSR1, original_handler)
support.wait_process(pid, exitcode=-signal.SIGUSR1)
def test_setsigdef_wrong_type(self):
with self.assertRaises(TypeError):
self.spawn_func(sys.executable,
[sys.executable, "-c", "pass"],
os.environ, setsigdef=34)
with self.assertRaises(TypeError):
self.spawn_func(sys.executable,
[sys.executable, "-c", "pass"],
os.environ, setsigdef=["j"])
with self.assertRaises(ValueError):
self.spawn_func(sys.executable,
[sys.executable, "-c", "pass"],
os.environ, setsigdef=[signal.NSIG, signal.NSIG+1])
@requires_sched
@unittest.skipIf(sys.platform.startswith(('freebsd', 'netbsd')),
"bpo-34685: test can fail on BSD")
def test_setscheduler_only_param(self):
policy = os.sched_getscheduler(0)
priority = os.sched_get_priority_min(policy)
code = textwrap.dedent(f"""\
import os, sys
if os.sched_getscheduler(0) != {policy}:
sys.exit(101)
if os.sched_getparam(0).sched_priority != {priority}:
sys.exit(102)""")
pid = self.spawn_func(
sys.executable,
[sys.executable, '-c', code],
os.environ,
scheduler=(None, os.sched_param(priority))
)
support.wait_process(pid, exitcode=0)
@requires_sched
@unittest.skipIf(sys.platform.startswith(('freebsd', 'netbsd')),
"bpo-34685: test can fail on BSD")
def test_setscheduler_with_policy(self):
policy = os.sched_getscheduler(0)
priority = os.sched_get_priority_min(policy)
code = textwrap.dedent(f"""\
import os, sys
if os.sched_getscheduler(0) != {policy}:
sys.exit(101)
if os.sched_getparam(0).sched_priority != {priority}:
sys.exit(102)""")
pid = self.spawn_func(
sys.executable,
[sys.executable, '-c', code],
os.environ,
scheduler=(policy, os.sched_param(priority))
)
support.wait_process(pid, exitcode=0)
def test_multiple_file_actions(self):
file_actions = [
(os.POSIX_SPAWN_OPEN, 3, os.path.realpath(__file__), os.O_RDONLY, 0),
(os.POSIX_SPAWN_CLOSE, 0),
(os.POSIX_SPAWN_DUP2, 1, 4),
]
pid = self.spawn_func(self.NOOP_PROGRAM[0],
self.NOOP_PROGRAM,
os.environ,
file_actions=file_actions)
support.wait_process(pid, exitcode=0)
def test_bad_file_actions(self):
args = self.NOOP_PROGRAM
with self.assertRaises(TypeError):
self.spawn_func(args[0], args, os.environ,
file_actions=[None])
with self.assertRaises(TypeError):
self.spawn_func(args[0], args, os.environ,
file_actions=[()])
with self.assertRaises(TypeError):
self.spawn_func(args[0], args, os.environ,
file_actions=[(None,)])
with self.assertRaises(TypeError):
self.spawn_func(args[0], args, os.environ,
file_actions=[(12345,)])
with self.assertRaises(TypeError):
self.spawn_func(args[0], args, os.environ,
file_actions=[(os.POSIX_SPAWN_CLOSE,)])
with self.assertRaises(TypeError):
self.spawn_func(args[0], args, os.environ,
file_actions=[(os.POSIX_SPAWN_CLOSE, 1, 2)])
with self.assertRaises(TypeError):
self.spawn_func(args[0], args, os.environ,
file_actions=[(os.POSIX_SPAWN_CLOSE, None)])
with self.assertRaises(ValueError):
self.spawn_func(args[0], args, os.environ,
file_actions=[(os.POSIX_SPAWN_OPEN,
3, __file__ + '\0',
os.O_RDONLY, 0)])
def test_open_file(self):
outfile = os_helper.TESTFN
self.addCleanup(os_helper.unlink, outfile)
script = """if 1:
import sys
sys.stdout.write("hello")
"""
file_actions = [
(os.POSIX_SPAWN_OPEN, 1, outfile,
os.O_WRONLY | os.O_CREAT | os.O_TRUNC,
stat.S_IRUSR | stat.S_IWUSR),
]
args = self.python_args('-c', script)
pid = self.spawn_func(args[0], args, os.environ,
file_actions=file_actions)
support.wait_process(pid, exitcode=0)
with open(outfile, encoding="utf-8") as f:
self.assertEqual(f.read(), 'hello')
def test_close_file(self):
closefile = os_helper.TESTFN
self.addCleanup(os_helper.unlink, closefile)
script = f"""if 1:
import os
try:
os.fstat(0)
except OSError as e:
with open({closefile!r}, 'w', encoding='utf-8') as closefile:
closefile.write('is closed %d' % e.errno)
"""
args = self.python_args('-c', script)
pid = self.spawn_func(args[0], args, os.environ,
file_actions=[(os.POSIX_SPAWN_CLOSE, 0)])
support.wait_process(pid, exitcode=0)
with open(closefile, encoding="utf-8") as f:
self.assertEqual(f.read(), 'is closed %d' % errno.EBADF)
def test_dup2(self):
dupfile = os_helper.TESTFN
self.addCleanup(os_helper.unlink, dupfile)
script = """if 1:
import sys
sys.stdout.write("hello")
"""
with open(dupfile, "wb") as childfile:
file_actions = [
(os.POSIX_SPAWN_DUP2, childfile.fileno(), 1),
]
args = self.python_args('-c', script)
pid = self.spawn_func(args[0], args, os.environ,
file_actions=file_actions)
support.wait_process(pid, exitcode=0)
with open(dupfile, encoding="utf-8") as f:
self.assertEqual(f.read(), 'hello')
@unittest.skipUnless(hasattr(os, 'posix_spawn'), "test needs os.posix_spawn")
@support.requires_subprocess()
class TestPosixSpawn(unittest.TestCase, _PosixSpawnMixin):
spawn_func = getattr(posix, 'posix_spawn', None)
@unittest.skipUnless(hasattr(os, 'posix_spawnp'), "test needs os.posix_spawnp")
@support.requires_subprocess()
class TestPosixSpawnP(unittest.TestCase, _PosixSpawnMixin):
spawn_func = getattr(posix, 'posix_spawnp', None)
@os_helper.skip_unless_symlink
def test_posix_spawnp(self):
# Use a symlink to create a program in its own temporary directory
temp_dir = tempfile.mkdtemp()
self.addCleanup(os_helper.rmtree, temp_dir)
program = 'posix_spawnp_test_program.exe'
program_fullpath = os.path.join(temp_dir, program)
os.symlink(sys.executable, program_fullpath)
try:
path = os.pathsep.join((temp_dir, os.environ['PATH']))
except KeyError:
path = temp_dir # PATH is not set
spawn_args = (program, '-I', '-S', '-c', 'pass')
code = textwrap.dedent("""
import os
from test import support
args = %a
pid = os.posix_spawnp(args[0], args, os.environ)
support.wait_process(pid, exitcode=0)
""" % (spawn_args,))
# Use a subprocess to test os.posix_spawnp() with a modified PATH
# environment variable: posix_spawnp() uses the current environment
# to locate the program, not its environment argument.
args = ('-c', code)
assert_python_ok(*args, PATH=path)
@unittest.skipUnless(sys.platform == "darwin", "test weak linking on macOS")
class TestPosixWeaklinking(unittest.TestCase):
# These test cases verify that weak linking support on macOS works
# as expected. These cases only test new behaviour introduced by weak linking,
# regular behaviour is tested by the normal test cases.
#
# See the section on Weak Linking in Mac/README.txt for more information.
def setUp(self):
import sysconfig
import platform
config_vars = sysconfig.get_config_vars()
self.available = { nm for nm in config_vars if nm.startswith("HAVE_") and config_vars[nm] }
self.mac_ver = tuple(int(part) for part in platform.mac_ver()[0].split("."))
def _verify_available(self, name):
if name not in self.available:
raise unittest.SkipTest(f"{name} not weak-linked")
def test_pwritev(self):
self._verify_available("HAVE_PWRITEV")
if self.mac_ver >= (10, 16):
self.assertTrue(hasattr(os, "pwritev"), "os.pwritev is not available")
self.assertTrue(hasattr(os, "preadv"), "os.readv is not available")
else:
self.assertFalse(hasattr(os, "pwritev"), "os.pwritev is available")
self.assertFalse(hasattr(os, "preadv"), "os.readv is available")
def test_stat(self):
self._verify_available("HAVE_FSTATAT")
if self.mac_ver >= (10, 10):
self.assertIn("HAVE_FSTATAT", posix._have_functions)
else:
self.assertNotIn("HAVE_FSTATAT", posix._have_functions)
with self.assertRaisesRegex(NotImplementedError, "dir_fd unavailable"):
os.stat("file", dir_fd=0)
def test_access(self):
self._verify_available("HAVE_FACCESSAT")
if self.mac_ver >= (10, 10):
self.assertIn("HAVE_FACCESSAT", posix._have_functions)
else:
self.assertNotIn("HAVE_FACCESSAT", posix._have_functions)
with self.assertRaisesRegex(NotImplementedError, "dir_fd unavailable"):
os.access("file", os.R_OK, dir_fd=0)
with self.assertRaisesRegex(NotImplementedError, "follow_symlinks unavailable"):
os.access("file", os.R_OK, follow_symlinks=False)
with self.assertRaisesRegex(NotImplementedError, "effective_ids unavailable"):
os.access("file", os.R_OK, effective_ids=True)
def test_chmod(self):
self._verify_available("HAVE_FCHMODAT")
if self.mac_ver >= (10, 10):
self.assertIn("HAVE_FCHMODAT", posix._have_functions)
else:
self.assertNotIn("HAVE_FCHMODAT", posix._have_functions)
self.assertIn("HAVE_LCHMOD", posix._have_functions)
with self.assertRaisesRegex(NotImplementedError, "dir_fd unavailable"):
os.chmod("file", 0o644, dir_fd=0)
def test_chown(self):
self._verify_available("HAVE_FCHOWNAT")
if self.mac_ver >= (10, 10):
self.assertIn("HAVE_FCHOWNAT", posix._have_functions)
else:
self.assertNotIn("HAVE_FCHOWNAT", posix._have_functions)
self.assertIn("HAVE_LCHOWN", posix._have_functions)
with self.assertRaisesRegex(NotImplementedError, "dir_fd unavailable"):
os.chown("file", 0, 0, dir_fd=0)
def test_link(self):
self._verify_available("HAVE_LINKAT")
if self.mac_ver >= (10, 10):
self.assertIn("HAVE_LINKAT", posix._have_functions)
else:
self.assertNotIn("HAVE_LINKAT", posix._have_functions)
with self.assertRaisesRegex(NotImplementedError, "src_dir_fd unavailable"):
os.link("source", "target", src_dir_fd=0)
with self.assertRaisesRegex(NotImplementedError, "dst_dir_fd unavailable"):
os.link("source", "target", dst_dir_fd=0)
with self.assertRaisesRegex(NotImplementedError, "src_dir_fd unavailable"):
os.link("source", "target", src_dir_fd=0, dst_dir_fd=0)
# issue 41355: !HAVE_LINKAT code path ignores the follow_symlinks flag
with os_helper.temp_dir() as base_path:
link_path = os.path.join(base_path, "link")
target_path = os.path.join(base_path, "target")
source_path = os.path.join(base_path, "source")
with open(source_path, "w") as fp:
fp.write("data")
os.symlink("target", link_path)
# Calling os.link should fail in the link(2) call, and
# should not reject *follow_symlinks* (to match the
# behaviour you'd get when building on a platform without
# linkat)
with self.assertRaises(FileExistsError):
os.link(source_path, link_path, follow_symlinks=True)
with self.assertRaises(FileExistsError):
os.link(source_path, link_path, follow_symlinks=False)
def test_listdir_scandir(self):
self._verify_available("HAVE_FDOPENDIR")
if self.mac_ver >= (10, 10):
self.assertIn("HAVE_FDOPENDIR", posix._have_functions)
else:
self.assertNotIn("HAVE_FDOPENDIR", posix._have_functions)
with self.assertRaisesRegex(TypeError, "listdir: path should be string, bytes, os.PathLike or None, not int"):
os.listdir(0)
with self.assertRaisesRegex(TypeError, "scandir: path should be string, bytes, os.PathLike or None, not int"):
os.scandir(0)
def test_mkdir(self):
self._verify_available("HAVE_MKDIRAT")
if self.mac_ver >= (10, 10):
self.assertIn("HAVE_MKDIRAT", posix._have_functions)
else:
self.assertNotIn("HAVE_MKDIRAT", posix._have_functions)
with self.assertRaisesRegex(NotImplementedError, "dir_fd unavailable"):
os.mkdir("dir", dir_fd=0)
def test_mkfifo(self):
self._verify_available("HAVE_MKFIFOAT")
if self.mac_ver >= (13, 0):
self.assertIn("HAVE_MKFIFOAT", posix._have_functions)
else:
self.assertNotIn("HAVE_MKFIFOAT", posix._have_functions)
with self.assertRaisesRegex(NotImplementedError, "dir_fd unavailable"):
os.mkfifo("path", dir_fd=0)
def test_mknod(self):
self._verify_available("HAVE_MKNODAT")
if self.mac_ver >= (13, 0):
self.assertIn("HAVE_MKNODAT", posix._have_functions)
else:
self.assertNotIn("HAVE_MKNODAT", posix._have_functions)
with self.assertRaisesRegex(NotImplementedError, "dir_fd unavailable"):
os.mknod("path", dir_fd=0)
def test_rename_replace(self):
self._verify_available("HAVE_RENAMEAT")
if self.mac_ver >= (10, 10):
self.assertIn("HAVE_RENAMEAT", posix._have_functions)
else:
self.assertNotIn("HAVE_RENAMEAT", posix._have_functions)
with self.assertRaisesRegex(NotImplementedError, "src_dir_fd and dst_dir_fd unavailable"):
os.rename("a", "b", src_dir_fd=0)
with self.assertRaisesRegex(NotImplementedError, "src_dir_fd and dst_dir_fd unavailable"):
os.rename("a", "b", dst_dir_fd=0)
with self.assertRaisesRegex(NotImplementedError, "src_dir_fd and dst_dir_fd unavailable"):
os.replace("a", "b", src_dir_fd=0)
with self.assertRaisesRegex(NotImplementedError, "src_dir_fd and dst_dir_fd unavailable"):
os.replace("a", "b", dst_dir_fd=0)
def test_unlink_rmdir(self):
self._verify_available("HAVE_UNLINKAT")
if self.mac_ver >= (10, 10):
self.assertIn("HAVE_UNLINKAT", posix._have_functions)
else:
self.assertNotIn("HAVE_UNLINKAT", posix._have_functions)
with self.assertRaisesRegex(NotImplementedError, "dir_fd unavailable"):
os.unlink("path", dir_fd=0)
with self.assertRaisesRegex(NotImplementedError, "dir_fd unavailable"):
os.rmdir("path", dir_fd=0)
def test_open(self):
self._verify_available("HAVE_OPENAT")
if self.mac_ver >= (10, 10):
self.assertIn("HAVE_OPENAT", posix._have_functions)
else:
self.assertNotIn("HAVE_OPENAT", posix._have_functions)
with self.assertRaisesRegex(NotImplementedError, "dir_fd unavailable"):
os.open("path", os.O_RDONLY, dir_fd=0)
def test_readlink(self):
self._verify_available("HAVE_READLINKAT")
if self.mac_ver >= (10, 10):
self.assertIn("HAVE_READLINKAT", posix._have_functions)
else:
self.assertNotIn("HAVE_READLINKAT", posix._have_functions)
with self.assertRaisesRegex(NotImplementedError, "dir_fd unavailable"):
os.readlink("path", dir_fd=0)
def test_symlink(self):
self._verify_available("HAVE_SYMLINKAT")
if self.mac_ver >= (10, 10):
self.assertIn("HAVE_SYMLINKAT", posix._have_functions)
else:
self.assertNotIn("HAVE_SYMLINKAT", posix._have_functions)
with self.assertRaisesRegex(NotImplementedError, "dir_fd unavailable"):
os.symlink("a", "b", dir_fd=0)
def test_utime(self):
self._verify_available("HAVE_FUTIMENS")
self._verify_available("HAVE_UTIMENSAT")
if self.mac_ver >= (10, 13):
self.assertIn("HAVE_FUTIMENS", posix._have_functions)
self.assertIn("HAVE_UTIMENSAT", posix._have_functions)
else:
self.assertNotIn("HAVE_FUTIMENS", posix._have_functions)
self.assertNotIn("HAVE_UTIMENSAT", posix._have_functions)
with self.assertRaisesRegex(NotImplementedError, "dir_fd unavailable"):
os.utime("path", dir_fd=0)
class NamespacesTests(unittest.TestCase):
"""Tests for os.unshare() and os.setns()."""
@unittest.skipUnless(hasattr(os, 'unshare'), 'needs os.unshare()')
@unittest.skipUnless(hasattr(os, 'setns'), 'needs os.setns()')
@unittest.skipUnless(os.path.exists('/proc/self/ns/uts'), 'need /proc/self/ns/uts')
@support.requires_linux_version(3, 0, 0)
def test_unshare_setns(self):
code = """if 1:
import errno
import os
import sys
fd = os.open('/proc/self/ns/uts', os.O_RDONLY)
try:
original = os.readlink('/proc/self/ns/uts')
try:
os.unshare(os.CLONE_NEWUTS)
except OSError as e:
if e.errno == errno.ENOSPC:
# skip test if limit is exceeded
sys.exit()
raise
new = os.readlink('/proc/self/ns/uts')
if original == new:
raise Exception('os.unshare failed')
os.setns(fd, os.CLONE_NEWUTS)
restored = os.readlink('/proc/self/ns/uts')
if original != restored:
raise Exception('os.setns failed')
except PermissionError:
# The calling process did not have the required privileges
# for this operation
pass
except OSError as e:
# Skip the test on these errors:
# - ENOSYS: syscall not available
# - EINVAL: kernel was not configured with the CONFIG_UTS_NS option
# - ENOMEM: not enough memory
if e.errno not in (errno.ENOSYS, errno.EINVAL, errno.ENOMEM):
raise
finally:
os.close(fd)
"""
assert_python_ok("-c", code)
def tearDownModule():
support.reap_children()
if __name__ == '__main__':
unittest.main()
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