mirror of
https://github.com/python/cpython.git
synced 2024-11-25 02:44:06 +08:00
289 lines
8.8 KiB
Python
289 lines
8.8 KiB
Python
import collections
|
|
import subprocess
|
|
import warnings
|
|
|
|
from . import protocols
|
|
from . import transports
|
|
from .log import logger
|
|
|
|
|
|
class BaseSubprocessTransport(transports.SubprocessTransport):
|
|
|
|
def __init__(self, loop, protocol, args, shell,
|
|
stdin, stdout, stderr, bufsize,
|
|
waiter=None, extra=None, **kwargs):
|
|
super().__init__(extra)
|
|
self._closed = False
|
|
self._protocol = protocol
|
|
self._loop = loop
|
|
self._proc = None
|
|
self._pid = None
|
|
self._returncode = None
|
|
self._exit_waiters = []
|
|
self._pending_calls = collections.deque()
|
|
self._pipes = {}
|
|
self._finished = False
|
|
|
|
if stdin == subprocess.PIPE:
|
|
self._pipes[0] = None
|
|
if stdout == subprocess.PIPE:
|
|
self._pipes[1] = None
|
|
if stderr == subprocess.PIPE:
|
|
self._pipes[2] = None
|
|
|
|
# Create the child process: set the _proc attribute
|
|
try:
|
|
self._start(args=args, shell=shell, stdin=stdin, stdout=stdout,
|
|
stderr=stderr, bufsize=bufsize, **kwargs)
|
|
except:
|
|
self.close()
|
|
raise
|
|
|
|
self._pid = self._proc.pid
|
|
self._extra['subprocess'] = self._proc
|
|
|
|
if self._loop.get_debug():
|
|
if isinstance(args, (bytes, str)):
|
|
program = args
|
|
else:
|
|
program = args[0]
|
|
logger.debug('process %r created: pid %s',
|
|
program, self._pid)
|
|
|
|
self._loop.create_task(self._connect_pipes(waiter))
|
|
|
|
def __repr__(self):
|
|
info = [self.__class__.__name__]
|
|
if self._closed:
|
|
info.append('closed')
|
|
if self._pid is not None:
|
|
info.append(f'pid={self._pid}')
|
|
if self._returncode is not None:
|
|
info.append(f'returncode={self._returncode}')
|
|
elif self._pid is not None:
|
|
info.append('running')
|
|
else:
|
|
info.append('not started')
|
|
|
|
stdin = self._pipes.get(0)
|
|
if stdin is not None:
|
|
info.append(f'stdin={stdin.pipe}')
|
|
|
|
stdout = self._pipes.get(1)
|
|
stderr = self._pipes.get(2)
|
|
if stdout is not None and stderr is stdout:
|
|
info.append(f'stdout=stderr={stdout.pipe}')
|
|
else:
|
|
if stdout is not None:
|
|
info.append(f'stdout={stdout.pipe}')
|
|
if stderr is not None:
|
|
info.append(f'stderr={stderr.pipe}')
|
|
|
|
return '<{}>'.format(' '.join(info))
|
|
|
|
def _start(self, args, shell, stdin, stdout, stderr, bufsize, **kwargs):
|
|
raise NotImplementedError
|
|
|
|
def set_protocol(self, protocol):
|
|
self._protocol = protocol
|
|
|
|
def get_protocol(self):
|
|
return self._protocol
|
|
|
|
def is_closing(self):
|
|
return self._closed
|
|
|
|
def close(self):
|
|
if self._closed:
|
|
return
|
|
self._closed = True
|
|
|
|
for proto in self._pipes.values():
|
|
if proto is None:
|
|
continue
|
|
proto.pipe.close()
|
|
|
|
if (self._proc is not None and
|
|
# has the child process finished?
|
|
self._returncode is None and
|
|
# the child process has finished, but the
|
|
# transport hasn't been notified yet?
|
|
self._proc.poll() is None):
|
|
|
|
if self._loop.get_debug():
|
|
logger.warning('Close running child process: kill %r', self)
|
|
|
|
try:
|
|
self._proc.kill()
|
|
except ProcessLookupError:
|
|
pass
|
|
|
|
# Don't clear the _proc reference yet: _post_init() may still run
|
|
|
|
def __del__(self, _warn=warnings.warn):
|
|
if not self._closed:
|
|
_warn(f"unclosed transport {self!r}", ResourceWarning, source=self)
|
|
self.close()
|
|
|
|
def get_pid(self):
|
|
return self._pid
|
|
|
|
def get_returncode(self):
|
|
return self._returncode
|
|
|
|
def get_pipe_transport(self, fd):
|
|
if fd in self._pipes:
|
|
return self._pipes[fd].pipe
|
|
else:
|
|
return None
|
|
|
|
def _check_proc(self):
|
|
if self._proc is None:
|
|
raise ProcessLookupError()
|
|
|
|
def send_signal(self, signal):
|
|
self._check_proc()
|
|
self._proc.send_signal(signal)
|
|
|
|
def terminate(self):
|
|
self._check_proc()
|
|
self._proc.terminate()
|
|
|
|
def kill(self):
|
|
self._check_proc()
|
|
self._proc.kill()
|
|
|
|
async def _connect_pipes(self, waiter):
|
|
try:
|
|
proc = self._proc
|
|
loop = self._loop
|
|
|
|
if proc.stdin is not None:
|
|
_, pipe = await loop.connect_write_pipe(
|
|
lambda: WriteSubprocessPipeProto(self, 0),
|
|
proc.stdin)
|
|
self._pipes[0] = pipe
|
|
|
|
if proc.stdout is not None:
|
|
_, pipe = await loop.connect_read_pipe(
|
|
lambda: ReadSubprocessPipeProto(self, 1),
|
|
proc.stdout)
|
|
self._pipes[1] = pipe
|
|
|
|
if proc.stderr is not None:
|
|
_, pipe = await loop.connect_read_pipe(
|
|
lambda: ReadSubprocessPipeProto(self, 2),
|
|
proc.stderr)
|
|
self._pipes[2] = pipe
|
|
|
|
assert self._pending_calls is not None
|
|
|
|
loop.call_soon(self._protocol.connection_made, self)
|
|
for callback, data in self._pending_calls:
|
|
loop.call_soon(callback, *data)
|
|
self._pending_calls = None
|
|
except (SystemExit, KeyboardInterrupt):
|
|
raise
|
|
except BaseException as exc:
|
|
if waiter is not None and not waiter.cancelled():
|
|
waiter.set_exception(exc)
|
|
else:
|
|
if waiter is not None and not waiter.cancelled():
|
|
waiter.set_result(None)
|
|
|
|
def _call(self, cb, *data):
|
|
if self._pending_calls is not None:
|
|
self._pending_calls.append((cb, data))
|
|
else:
|
|
self._loop.call_soon(cb, *data)
|
|
|
|
def _pipe_connection_lost(self, fd, exc):
|
|
self._call(self._protocol.pipe_connection_lost, fd, exc)
|
|
self._try_finish()
|
|
|
|
def _pipe_data_received(self, fd, data):
|
|
self._call(self._protocol.pipe_data_received, fd, data)
|
|
|
|
def _process_exited(self, returncode):
|
|
assert returncode is not None, returncode
|
|
assert self._returncode is None, self._returncode
|
|
if self._loop.get_debug():
|
|
logger.info('%r exited with return code %r', self, returncode)
|
|
self._returncode = returncode
|
|
if self._proc.returncode is None:
|
|
# asyncio uses a child watcher: copy the status into the Popen
|
|
# object. On Python 3.6, it is required to avoid a ResourceWarning.
|
|
self._proc.returncode = returncode
|
|
self._call(self._protocol.process_exited)
|
|
for p in self._pipes.values():
|
|
if p is not None:
|
|
p.pipe.close()
|
|
|
|
self._try_finish()
|
|
|
|
async def _wait(self):
|
|
"""Wait until the process exit and return the process return code.
|
|
|
|
This method is a coroutine."""
|
|
if self._returncode is not None:
|
|
return self._returncode
|
|
|
|
waiter = self._loop.create_future()
|
|
self._exit_waiters.append(waiter)
|
|
return await waiter
|
|
|
|
def _try_finish(self):
|
|
assert not self._finished
|
|
if self._returncode is None:
|
|
return
|
|
if all(p is not None and p.disconnected
|
|
for p in self._pipes.values()):
|
|
self._finished = True
|
|
self._call(self._call_connection_lost, None)
|
|
|
|
def _call_connection_lost(self, exc):
|
|
try:
|
|
self._protocol.connection_lost(exc)
|
|
finally:
|
|
# wake up futures waiting for wait()
|
|
for waiter in self._exit_waiters:
|
|
if not waiter.cancelled():
|
|
waiter.set_result(self._returncode)
|
|
self._exit_waiters = None
|
|
self._loop = None
|
|
self._proc = None
|
|
self._protocol = None
|
|
|
|
|
|
class WriteSubprocessPipeProto(protocols.BaseProtocol):
|
|
|
|
def __init__(self, proc, fd):
|
|
self.proc = proc
|
|
self.fd = fd
|
|
self.pipe = None
|
|
self.disconnected = False
|
|
|
|
def connection_made(self, transport):
|
|
self.pipe = transport
|
|
|
|
def __repr__(self):
|
|
return f'<{self.__class__.__name__} fd={self.fd} pipe={self.pipe!r}>'
|
|
|
|
def connection_lost(self, exc):
|
|
self.disconnected = True
|
|
self.proc._pipe_connection_lost(self.fd, exc)
|
|
self.proc = None
|
|
|
|
def pause_writing(self):
|
|
self.proc._protocol.pause_writing()
|
|
|
|
def resume_writing(self):
|
|
self.proc._protocol.resume_writing()
|
|
|
|
|
|
class ReadSubprocessPipeProto(WriteSubprocessPipeProto,
|
|
protocols.Protocol):
|
|
|
|
def data_received(self, data):
|
|
self.proc._pipe_data_received(self.fd, data)
|