You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
242 lines
7.9 KiB
242 lines
7.9 KiB
__all__ = 'create_subprocess_exec', 'create_subprocess_shell'
|
|
|
|
import subprocess
|
|
import warnings
|
|
|
|
from . import events
|
|
from . import protocols
|
|
from . import streams
|
|
from . import tasks
|
|
from .log import logger
|
|
|
|
|
|
PIPE = subprocess.PIPE
|
|
STDOUT = subprocess.STDOUT
|
|
DEVNULL = subprocess.DEVNULL
|
|
|
|
|
|
class SubprocessStreamProtocol(streams.FlowControlMixin,
|
|
protocols.SubprocessProtocol):
|
|
"""Like StreamReaderProtocol, but for a subprocess."""
|
|
|
|
def __init__(self, limit, loop):
|
|
super().__init__(loop=loop)
|
|
self._limit = limit
|
|
self.stdin = self.stdout = self.stderr = None
|
|
self._transport = None
|
|
self._process_exited = False
|
|
self._pipe_fds = []
|
|
self._stdin_closed = self._loop.create_future()
|
|
|
|
def __repr__(self):
|
|
info = [self.__class__.__name__]
|
|
if self.stdin is not None:
|
|
info.append(f'stdin={self.stdin!r}')
|
|
if self.stdout is not None:
|
|
info.append(f'stdout={self.stdout!r}')
|
|
if self.stderr is not None:
|
|
info.append(f'stderr={self.stderr!r}')
|
|
return '<{}>'.format(' '.join(info))
|
|
|
|
def connection_made(self, transport):
|
|
self._transport = transport
|
|
|
|
stdout_transport = transport.get_pipe_transport(1)
|
|
if stdout_transport is not None:
|
|
self.stdout = streams.StreamReader(limit=self._limit,
|
|
loop=self._loop)
|
|
self.stdout.set_transport(stdout_transport)
|
|
self._pipe_fds.append(1)
|
|
|
|
stderr_transport = transport.get_pipe_transport(2)
|
|
if stderr_transport is not None:
|
|
self.stderr = streams.StreamReader(limit=self._limit,
|
|
loop=self._loop)
|
|
self.stderr.set_transport(stderr_transport)
|
|
self._pipe_fds.append(2)
|
|
|
|
stdin_transport = transport.get_pipe_transport(0)
|
|
if stdin_transport is not None:
|
|
self.stdin = streams.StreamWriter(stdin_transport,
|
|
protocol=self,
|
|
reader=None,
|
|
loop=self._loop)
|
|
|
|
def pipe_data_received(self, fd, data):
|
|
if fd == 1:
|
|
reader = self.stdout
|
|
elif fd == 2:
|
|
reader = self.stderr
|
|
else:
|
|
reader = None
|
|
if reader is not None:
|
|
reader.feed_data(data)
|
|
|
|
def pipe_connection_lost(self, fd, exc):
|
|
if fd == 0:
|
|
pipe = self.stdin
|
|
if pipe is not None:
|
|
pipe.close()
|
|
self.connection_lost(exc)
|
|
if exc is None:
|
|
self._stdin_closed.set_result(None)
|
|
else:
|
|
self._stdin_closed.set_exception(exc)
|
|
return
|
|
if fd == 1:
|
|
reader = self.stdout
|
|
elif fd == 2:
|
|
reader = self.stderr
|
|
else:
|
|
reader = None
|
|
if reader is not None:
|
|
if exc is None:
|
|
reader.feed_eof()
|
|
else:
|
|
reader.set_exception(exc)
|
|
|
|
if fd in self._pipe_fds:
|
|
self._pipe_fds.remove(fd)
|
|
self._maybe_close_transport()
|
|
|
|
def process_exited(self):
|
|
self._process_exited = True
|
|
self._maybe_close_transport()
|
|
|
|
def _maybe_close_transport(self):
|
|
if len(self._pipe_fds) == 0 and self._process_exited:
|
|
self._transport.close()
|
|
self._transport = None
|
|
|
|
def _get_close_waiter(self, stream):
|
|
if stream is self.stdin:
|
|
return self._stdin_closed
|
|
|
|
|
|
class Process:
|
|
def __init__(self, transport, protocol, loop):
|
|
self._transport = transport
|
|
self._protocol = protocol
|
|
self._loop = loop
|
|
self.stdin = protocol.stdin
|
|
self.stdout = protocol.stdout
|
|
self.stderr = protocol.stderr
|
|
self.pid = transport.get_pid()
|
|
|
|
def __repr__(self):
|
|
return f'<{self.__class__.__name__} {self.pid}>'
|
|
|
|
@property
|
|
def returncode(self):
|
|
return self._transport.get_returncode()
|
|
|
|
async def wait(self):
|
|
"""Wait until the process exit and return the process return code."""
|
|
return await self._transport._wait()
|
|
|
|
def send_signal(self, signal):
|
|
self._transport.send_signal(signal)
|
|
|
|
def terminate(self):
|
|
self._transport.terminate()
|
|
|
|
def kill(self):
|
|
self._transport.kill()
|
|
|
|
async def _feed_stdin(self, input):
|
|
debug = self._loop.get_debug()
|
|
self.stdin.write(input)
|
|
if debug:
|
|
logger.debug(
|
|
'%r communicate: feed stdin (%s bytes)', self, len(input))
|
|
try:
|
|
await self.stdin.drain()
|
|
except (BrokenPipeError, ConnectionResetError) as exc:
|
|
# communicate() ignores BrokenPipeError and ConnectionResetError
|
|
if debug:
|
|
logger.debug('%r communicate: stdin got %r', self, exc)
|
|
|
|
if debug:
|
|
logger.debug('%r communicate: close stdin', self)
|
|
self.stdin.close()
|
|
|
|
async def _noop(self):
|
|
return None
|
|
|
|
async def _read_stream(self, fd):
|
|
transport = self._transport.get_pipe_transport(fd)
|
|
if fd == 2:
|
|
stream = self.stderr
|
|
else:
|
|
assert fd == 1
|
|
stream = self.stdout
|
|
if self._loop.get_debug():
|
|
name = 'stdout' if fd == 1 else 'stderr'
|
|
logger.debug('%r communicate: read %s', self, name)
|
|
output = await stream.read()
|
|
if self._loop.get_debug():
|
|
name = 'stdout' if fd == 1 else 'stderr'
|
|
logger.debug('%r communicate: close %s', self, name)
|
|
transport.close()
|
|
return output
|
|
|
|
async def communicate(self, input=None):
|
|
if input is not None:
|
|
stdin = self._feed_stdin(input)
|
|
else:
|
|
stdin = self._noop()
|
|
if self.stdout is not None:
|
|
stdout = self._read_stream(1)
|
|
else:
|
|
stdout = self._noop()
|
|
if self.stderr is not None:
|
|
stderr = self._read_stream(2)
|
|
else:
|
|
stderr = self._noop()
|
|
stdin, stdout, stderr = await tasks.gather(stdin, stdout, stderr,
|
|
loop=self._loop)
|
|
await self.wait()
|
|
return (stdout, stderr)
|
|
|
|
|
|
async def create_subprocess_shell(cmd, stdin=None, stdout=None, stderr=None,
|
|
loop=None, limit=streams._DEFAULT_LIMIT,
|
|
**kwds):
|
|
if loop is None:
|
|
loop = events.get_event_loop()
|
|
else:
|
|
warnings.warn("The loop argument is deprecated since Python 3.8 "
|
|
"and scheduled for removal in Python 3.10.",
|
|
DeprecationWarning,
|
|
stacklevel=2
|
|
)
|
|
|
|
protocol_factory = lambda: SubprocessStreamProtocol(limit=limit,
|
|
loop=loop)
|
|
transport, protocol = await loop.subprocess_shell(
|
|
protocol_factory,
|
|
cmd, stdin=stdin, stdout=stdout,
|
|
stderr=stderr, **kwds)
|
|
return Process(transport, protocol, loop)
|
|
|
|
|
|
async def create_subprocess_exec(program, *args, stdin=None, stdout=None,
|
|
stderr=None, loop=None,
|
|
limit=streams._DEFAULT_LIMIT, **kwds):
|
|
if loop is None:
|
|
loop = events.get_event_loop()
|
|
else:
|
|
warnings.warn("The loop argument is deprecated since Python 3.8 "
|
|
"and scheduled for removal in Python 3.10.",
|
|
DeprecationWarning,
|
|
stacklevel=2
|
|
)
|
|
protocol_factory = lambda: SubprocessStreamProtocol(limit=limit,
|
|
loop=loop)
|
|
transport, protocol = await loop.subprocess_exec(
|
|
protocol_factory,
|
|
program, *args,
|
|
stdin=stdin, stdout=stdout,
|
|
stderr=stderr, **kwds)
|
|
return Process(transport, protocol, loop)
|