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subprocess.py

__all__ = ['create_subprocess_exec', 'create_subprocess_shell']

import subprocess

from . import events
from . import protocols
from . import streams
from . import tasks
from .coroutines import coroutine
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 = []

def __repr__(self):
        info = [self.__class__.__name__]
        if self.stdin is not None:
            info.append('stdin=%r' % self.stdin)
        if self.stdout is not None:
            info.append('stdout=%r' % self.stdout)
        if self.stderr is not None:
            info.append('stderr=%r' % self.stderr)
        return '<%s>' % ' '.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)
            return
        if fd == 1:
            reader = self.stdout
        elif fd == 2:
            reader = self.stderr
        else:
            reader = None
        if reader != 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

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 '<%s %s>' % (self.__class__.__name__, self.pid)

@property
    def returncode(self):
        return self._transport.get_returncode()

@coroutine
    def wait(self):
        """Wait until the process exit and return the process return code.

This method is a coroutine."""
        return (yield from 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()

@coroutine
    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:
            yield from 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()

@coroutine
    def _noop(self):
        return None

@coroutine
    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 = yield from 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

@coroutine
    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 = yield from tasks.gather(stdin, stdout, stderr,
                                                        loop=self._loop)
        yield from self.wait()
        return (stdout, stderr)

@coroutine
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()
    protocol_factory = lambda: SubprocessStreamProtocol(limit=limit,
                                                        loop=loop)
    transport, protocol = yield from loop.subprocess_shell(
                                            protocol_factory,
                                            cmd, stdin=stdin, stdout=stdout,
                                            stderr=stderr, **kwds)
    return Process(transport, protocol, loop)

@coroutine
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()
    protocol_factory = lambda: SubprocessStreamProtocol(limit=limit,
                                                        loop=loop)
    transport, protocol = yield from loop.subprocess_exec(
                                            protocol_factory,
                                            program, *args,
                                            stdin=stdin, stdout=stdout,
                                            stderr=stderr, **kwds)
    return Process(transport, protocol, loop)

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/linksafe	drwxr-xr-x	2024-05-22 05:01:42
..	dir	-	root/linksafe	drwxr-xr-x	2024-05-22 05:01:42
__pycache__	dir	-	root/linksafe	drwxr-xr-x	2024-05-22 05:01:42
__init__.py	text/plain	1.4 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
base_events.py	text/plain	56.52 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
base_futures.py	text/x-script.python	2.03 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
base_subprocess.py	text/x-script.python	8.88 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
base_tasks.py	text/x-script.python	2.13 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
compat.py	text/plain	543 B	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
constants.py	text/plain	371 B	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
coroutines.py	text/x-script.python	10.87 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
events.py	text/plain	22.96 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
futures.py	text/plain	15.53 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
locks.py	text/plain	15.22 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
log.py	text/plain	124 B	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
proactor_events.py	text/plain	19.92 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
protocols.py	text/plain	4.41 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
queues.py	text/plain	7.77 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
selector_events.py	text/plain	40.66 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
sslproto.py	text/x-script.python	25.4 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
streams.py	text/plain	23.9 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
subprocess.py	text/x-script.python	7.45 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
tasks.py	text/plain	24.47 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
test_utils.py	text/plain	14.74 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
transports.py	text/plain	9.83 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
unix_events.py	text/plain	36.39 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
windows_events.py	text/plain	27.18 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39
windows_utils.py	text/plain	6.72 KB	root/linksafe	-rw-r--r--	2024-04-17 05:19:39