1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
__all__ = ['create_subprocess_exec', 'create_subprocess_shell']
import collections
import subprocess
from . import events
from . import futures
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.waiter = futures.Future(loop=loop)
self._waiters = collections.deque()
self._transport = None
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)
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)
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)
self.waiter.set_result(None)
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)
def process_exited(self):
# wake up futures waiting for wait()
returncode = self._transport.get_returncode()
while self._waiters:
waiter = self._waiters.popleft()
waiter.set_result(returncode)
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."""
returncode = self._transport.get_returncode()
if returncode is not None:
return returncode
waiter = futures.Future(loop=self._loop)
self._protocol._waiters.append(waiter)
yield from waiter
return waiter.result()
def _check_alive(self):
if self._transport.get_returncode() is not None:
raise ProcessLookupError()
def send_signal(self, signal):
self._check_alive()
self._transport.send_signal(signal)
def terminate(self):
self._check_alive()
self._transport.terminate()
def kill(self):
self._check_alive()
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:
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)
yield from protocol.waiter
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)
yield from protocol.waiter
return Process(transport, protocol, loop)
|
