"Test posix functions" from test import support from test.support import import_helper 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 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) # OSX evidently just returns 15 without checking the argument. if sys.platform != "darwin": self.assertRaises(OSError, posix.sched_get_priority_min, -23) self.assertRaises(OSError, posix.sched_get_priority_max, -23) @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) @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") class TestPosixSpawn(unittest.TestCase, _PosixSpawnMixin): spawn_func = getattr(posix, 'posix_spawn', None) @unittest.skipUnless(hasattr(os, 'posix_spawnp'), "test needs os.posix_spawnp") 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()