def winpopen4(orig, cmd, env=None, newlines=False, bufsize=-1): """Same as util.popen4, but manually creates an input pipe with a larger than default buffer""" import msvcrt if sys.version_info[0] < 3: import _subprocess handles = _subprocess.CreatePipe(None, pipei_bufsize) rfd, wfd = [msvcrt.open_osfhandle(h, 0) for h in handles] else: import _winapi handles = _winapi.CreatePipe(None, pipei_bufsize) rfd, wfd = [msvcrt.open_osfhandle(h, 0) for h in handles] handles = [subprocess.Handle(h) for h in handles] handles[0].Detach() handles[1].Detach() p = subprocess.Popen( cmd, shell=True, bufsize=bufsize, close_fds=False, stdin=rfd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=newlines, env=env, ) p.stdin = util.fdopen(wfd, "wb", bufsize) return p.stdin, p.stdout, p.stderr, p
def __init__(self, process_obj): prep_data = spawn.get_preparation_data(process_obj._name) rhandle, whandle = _winapi.CreatePipe(None, 0) wfd = msvcrt.open_osfhandle(whandle, 0) cmd = spawn.get_command_line(parent_pid=os.getpid(), pipe_handle= rhandle) cmd = ' '.join('"%s"' % x for x in cmd) with open(wfd, 'wb', closefd=True) as to_child: try: hp, ht, pid, tid = _winapi.CreateProcess(spawn. get_executable(), cmd, None, None, False, 0, None, None, None) _winapi.CloseHandle(ht) except: _winapi.CloseHandle(rhandle) raise self.pid = pid self.returncode = None self._handle = hp self.sentinel = int(hp) util.Finalize(self, _winapi.CloseHandle, (self.sentinel,)) set_spawning_popen(self) try: reduction.dump(prep_data, to_child) reduction.dump(process_obj, to_child) finally: set_spawning_popen(None)
def __init__(self, process_obj): prep_data = spawn.get_preparation_data(process_obj._name) # read end of pipe will be duplicated by the child process # -- see spawn_main() in spawn.py. # # bpo-33929: Previously, the read end of pipe was "stolen" by the child # process, but it leaked a handle if the child process had been # terminated before it could steal the handle from the parent process. rhandle, whandle = _winapi.CreatePipe(None, 0) wfd = msvcrt.open_osfhandle(whandle, 0) cmd = spawn.get_command_line(parent_pid=os.getpid(), pipe_handle=rhandle) cmd = ' '.join('"%s"' % x for x in cmd) python_exe = spawn.get_executable() # bpo-35797: When running in a venv, we bypass the redirect # executor and launch our base Python. if WINENV and _path_eq(python_exe, sys.executable): python_exe = sys._base_executable env = os.environ.copy() env["__PYVENV_LAUNCHER__"] = sys.executable else: env = os.environ.copy() env['Y_PYTHON_ENTRY_POINT'] = ':main' with open(wfd, 'wb', closefd=True) as to_child: # start process try: hp, ht, pid, tid = _winapi.CreateProcess( python_exe, cmd, None, None, False, 0, env, None, None) _winapi.CloseHandle(ht) except: _winapi.CloseHandle(rhandle) raise # set attributes of self self.pid = pid self.returncode = None self._handle = hp self.sentinel = int(hp) self.finalizer = util.Finalize(self, _close_handles, (self.sentinel, int(rhandle))) # send information to child set_spawning_popen(self) try: reduction.dump(prep_data, to_child) reduction.dump(process_obj, to_child) finally: set_spawning_popen(None)
def _get_handles(self, stdin, stdout, stderr): if stdin is None and stdout is None and stderr is None: return (-1, -1, -1, -1, -1, -1) (p2cread, p2cwrite) = (-1, -1) (c2pread, c2pwrite) = (-1, -1) (errread, errwrite) = (-1, -1) if stdin is None: p2cread = _winapi.GetStdHandle(_winapi.STD_INPUT_HANDLE) (p2cread, _) = _winapi.CreatePipe(None, 0) p2cread = Handle(p2cread) _winapi.CloseHandle(_) elif stdin == PIPE: (p2cread, p2cwrite) = _winapi.CreatePipe(None, 0) (p2cread, p2cwrite) = (Handle(p2cread), Handle(p2cwrite)) elif stdin == DEVNULL: p2cread = msvcrt.get_osfhandle(self._get_devnull()) elif isinstance(stdin, int): p2cread = msvcrt.get_osfhandle(stdin) else: p2cread = msvcrt.get_osfhandle(stdin.fileno()) p2cread = self._make_inheritable(p2cread) if stdout is None: c2pwrite = _winapi.GetStdHandle(_winapi.STD_OUTPUT_HANDLE) (_, c2pwrite) = _winapi.CreatePipe(None, 0) c2pwrite = Handle(c2pwrite) _winapi.CloseHandle(_) elif stdout == PIPE: (c2pread, c2pwrite) = _winapi.CreatePipe(None, 0) (c2pread, c2pwrite) = (Handle(c2pread), Handle(c2pwrite)) elif stdout == DEVNULL: c2pwrite = msvcrt.get_osfhandle(self._get_devnull()) elif isinstance(stdout, int): c2pwrite = msvcrt.get_osfhandle(stdout) else: c2pwrite = msvcrt.get_osfhandle(stdout.fileno()) c2pwrite = self._make_inheritable(c2pwrite) if stderr is None: errwrite = _winapi.GetStdHandle(_winapi.STD_ERROR_HANDLE) (_, errwrite) = _winapi.CreatePipe(None, 0) errwrite = Handle(errwrite) _winapi.CloseHandle(_) elif stderr == PIPE: (errread, errwrite) = _winapi.CreatePipe(None, 0) (errread, errwrite) = (Handle(errread), Handle(errwrite)) elif stderr == STDOUT: errwrite = c2pwrite elif stderr == DEVNULL: errwrite = msvcrt.get_osfhandle(self._get_devnull()) elif isinstance(stderr, int): errwrite = msvcrt.get_osfhandle(stderr) else: errwrite = msvcrt.get_osfhandle(stderr.fileno()) errwrite = self._make_inheritable(errwrite) return (p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite)
def __init__(self, process_obj): prep_data = spawn.get_preparation_data(process_obj._name) # read end of pipe will be duplicated by the child process # -- see spawn_main() in spawn.py. # # bpo-33929: Previously, the read end of pipe was "stolen" by the child # process, but it leaked a handle if the child process had been # terminated before it could steal the handle from the parent process. rhandle, whandle = _winapi.CreatePipe(None, 0) wfd = msvcrt.open_osfhandle(whandle, 0) cmd = spawn.get_command_line(parent_pid=os.getpid(), pipe_handle=rhandle) cmd = ' '.join('"%s"' % x for x in cmd) with open(wfd, 'wb', closefd=True) as to_child: # start process try: hp, ht, pid, tid = _winapi.CreateProcess( spawn.get_executable(), cmd, None, None, False, 0, None, None, None) _winapi.CloseHandle(ht) except: _winapi.CloseHandle(rhandle) raise # set attributes of self self.pid = pid self.returncode = None self._handle = hp self.sentinel = int(hp) self.finalizer = util.Finalize(self, _close_handles, (self.sentinel, int(rhandle))) # send information to child set_spawning_popen(self) try: reduction.dump(prep_data, to_child) reduction.dump(process_obj, to_child) finally: set_spawning_popen(None)
def __init__(self, process_obj): prep_data = spawn.get_preparation_data(process_obj._name) # read end of pipe will be "stolen" by the child process # -- see spawn_main() in spawn.py. rhandle, whandle = _winapi.CreatePipe(None, 0) wfd = msvcrt.open_osfhandle(whandle, 0) cmd = spawn.get_command_line(parent_pid=os.getpid(), pipe_handle=rhandle) cmd = ' '.join('"%s"' % x for x in cmd) with open(wfd, 'wb', closefd=True) as to_child: # start process try: hp, ht, pid, tid = _winapi.CreateProcess( spawn.get_executable(), cmd, None, None, False, 0, None, None, None) _winapi.CloseHandle(ht) except: _winapi.CloseHandle(rhandle) raise # set attributes of self self.pid = pid self.returncode = None self._handle = hp self.sentinel = int(hp) util.Finalize(self, _winapi.CloseHandle, (self.sentinel, )) # send information to child popen.set_spawning_popen(self) try: reduction.dump(prep_data, to_child) reduction.dump(process_obj, to_child) finally: popen.set_spawning_popen(None)
def _get_handles(self, stdin, stdout, stderr): """Construct and return tuple with IO objects: p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite """ if stdin is None and stdout is None and stderr is None: return (-1, -1, -1, -1, -1, -1) p2cread, p2cwrite = -1, -1 c2pread, c2pwrite = -1, -1 errread, errwrite = -1, -1 if stdin is None: p2cread = _winapi.GetStdHandle(_winapi.STD_INPUT_HANDLE) if p2cread is None: p2cread, _ = _winapi.CreatePipe(None, 0) p2cread = Handle(p2cread) _winapi.CloseHandle(_) elif stdin == PIPE: p2cread, p2cwrite = _winapi.CreatePipe(None, 0) p2cread, p2cwrite = Handle(p2cread), Handle(p2cwrite) elif stdin == DEVNULL: p2cread = msvcrt.get_osfhandle(self._get_devnull()) elif isinstance(stdin, int): p2cread = msvcrt.get_osfhandle(stdin) else: # Assuming file-like object p2cread = msvcrt.get_osfhandle(stdin.fileno()) p2cread = self._make_inheritable(p2cread) if stdout is None: c2pwrite = _winapi.GetStdHandle(_winapi.STD_OUTPUT_HANDLE) if c2pwrite is None: _, c2pwrite = _winapi.CreatePipe(None, 0) c2pwrite = Handle(c2pwrite) _winapi.CloseHandle(_) elif stdout == PIPE: c2pread, c2pwrite = _winapi.CreatePipe(None, 0) c2pread, c2pwrite = Handle(c2pread), Handle(c2pwrite) elif stdout == DEVNULL: c2pwrite = msvcrt.get_osfhandle(self._get_devnull()) elif isinstance(stdout, int): c2pwrite = msvcrt.get_osfhandle(stdout) else: # Assuming file-like object c2pwrite = msvcrt.get_osfhandle(stdout.fileno()) c2pwrite = self._make_inheritable(c2pwrite) if stderr is None: errwrite = _winapi.GetStdHandle(_winapi.STD_ERROR_HANDLE) if errwrite is None: _, errwrite = _winapi.CreatePipe(None, 0) errwrite = Handle(errwrite) _winapi.CloseHandle(_) elif stderr == PIPE: errread, errwrite = _winapi.CreatePipe(None, 0) errread, errwrite = Handle(errread), Handle(errwrite) elif stderr == STDOUT: errwrite = c2pwrite elif stderr == DEVNULL: errwrite = msvcrt.get_osfhandle(self._get_devnull()) elif isinstance(stderr, int): errwrite = msvcrt.get_osfhandle(stderr) else: # Assuming file-like object errwrite = msvcrt.get_osfhandle(stderr.fileno()) errwrite = self._make_inheritable(errwrite) return (p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite)