我们从Python开源项目中，提取了以下40个代码示例，用于说明如何使用os.get_inheritable()。
def test_pass_fds_inheritable(self): script = support.findfile("fd_status.py", subdir="subprocessdata") inheritable, non_inheritable = os.pipe() self.addCleanup(os.close, inheritable) self.addCleanup(os.close, non_inheritable) os.set_inheritable(inheritable, True) os.set_inheritable(non_inheritable, False) pass_fds = (inheritable, non_inheritable) args = [sys.executable, script] args += list(map(str, pass_fds)) p = subprocess.Popen(args, stdout=subprocess.PIPE, close_fds=True, pass_fds=pass_fds) output, ignored = p.communicate() fds = set(map(int, output.split(b','))) # the inheritable file descriptor must be inherited, so its inheritable # flag must be set in the child process after fork() and before exec() self.assertEqual(fds, set(pass_fds), "output=%a" % output) # inheritable flag must not be changed in the parent process self.assertEqual(os.get_inheritable(inheritable), True) self.assertEqual(os.get_inheritable(non_inheritable), False)
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.assertTrue(fcntl.fcntl(r, fcntl.F_GETFL) & os.O_NONBLOCK) self.assertTrue(fcntl.fcntl(w, fcntl.F_GETFL) & os.O_NONBLOCK) # try reading from an empty pipe: this should fail, not block self.assertRaises(OSError, os.read, r, 1) # try a write big enough to fill-up the pipe: this should either # fail or perform a partial write, not block try: os.write(w, b'x' * support.PIPE_MAX_SIZE) except OSError: pass
def get_inheritable(self): return os.get_handle_inheritable(self.fileno())
def get_inheritable(self): return os.get_inheritable(self.fileno())
def test_get_set_inheritable(self): fd = os.open(__file__, os.O_RDONLY) self.addCleanup(os.close, fd) self.assertEqual(os.get_inheritable(fd), False) os.set_inheritable(fd, True) self.assertEqual(os.get_inheritable(fd), True)
def test_get_inheritable_cloexec(self): fd = os.open(__file__, os.O_RDONLY) self.addCleanup(os.close, fd) self.assertEqual(os.get_inheritable(fd), False) # clear FD_CLOEXEC flag flags = fcntl.fcntl(fd, fcntl.F_GETFD) flags &= ~fcntl.FD_CLOEXEC fcntl.fcntl(fd, fcntl.F_SETFD, flags) self.assertEqual(os.get_inheritable(fd), True)
def test_open(self): fd = os.open(__file__, os.O_RDONLY) self.addCleanup(os.close, fd) self.assertEqual(os.get_inheritable(fd), False)
def test_pipe(self): rfd, wfd = os.pipe() self.addCleanup(os.close, rfd) self.addCleanup(os.close, wfd) self.assertEqual(os.get_inheritable(rfd), False) self.assertEqual(os.get_inheritable(wfd), False)
def test_dup(self): fd1 = os.open(__file__, os.O_RDONLY) self.addCleanup(os.close, fd1) fd2 = os.dup(fd1) self.addCleanup(os.close, fd2) self.assertEqual(os.get_inheritable(fd2), False)
def test_openpty(self): master_fd, slave_fd = os.openpty() self.addCleanup(os.close, master_fd) self.addCleanup(os.close, slave_fd) self.assertEqual(os.get_inheritable(master_fd), False) self.assertEqual(os.get_inheritable(slave_fd), False)
def _save_fds(self, save_fds): fds = [] for fd in save_fds: inheritable = os.get_inheritable(fd) saved = os.dup(fd) fds.append((fd, saved, inheritable)) return fds
def test_noinherit(self): # _mkstemp_inner file handles are not inherited by child processes if support.verbose: v="v" else: v="q" file = self.do_create() self.assertEqual(os.get_inheritable(file.fd), False) fd = "%d" % file.fd try: me = __file__ except NameError: me = sys.argv[0] # We have to exec something, so that FD_CLOEXEC will take # effect. The core of this test is therefore in # tf_inherit_check.py, which see. tester = os.path.join(os.path.dirname(os.path.abspath(me)), "tf_inherit_check.py") # On Windows a spawn* /path/ with embedded spaces shouldn't be quoted, # but an arg with embedded spaces should be decorated with double # quotes on each end if sys.platform == 'win32': decorated = '"%s"' % sys.executable tester = '"%s"' % tester else: decorated = sys.executable retval = os.spawnl(os.P_WAIT, sys.executable, decorated, tester, v, fd) self.assertFalse(retval < 0, "child process caught fatal signal %d" % -retval) self.assertFalse(retval > 0, "child process reports failure %d"%retval)
def test_fd_non_inheritable(self): epoll = select.epoll() self.addCleanup(epoll.close) self.assertEqual(os.get_inheritable(epoll.fileno()), False)
def test_fd_non_inheritable(self): devpoll = select.devpoll() self.addCleanup(devpoll.close) self.assertEqual(os.get_inheritable(devpoll.fileno()), False)
def test_open_non_inheritable(self): fileobj = open(__file__) with fileobj: self.assertFalse(os.get_inheritable(fileobj.fileno()))
