Guido van Rossum | 0016e1d | 2013-10-30 14:56:49 -0700 | [diff] [blame] | 1 | import collections |
| 2 | import subprocess |
| 3 | |
| 4 | from . import protocols |
| 5 | from . import tasks |
| 6 | from . import transports |
| 7 | |
| 8 | |
| 9 | STDIN = 0 |
| 10 | STDOUT = 1 |
| 11 | STDERR = 2 |
| 12 | |
| 13 | |
| 14 | class BaseSubprocessTransport(transports.SubprocessTransport): |
| 15 | |
| 16 | def __init__(self, loop, protocol, args, shell, |
| 17 | stdin, stdout, stderr, bufsize, |
| 18 | extra=None, **kwargs): |
| 19 | super().__init__(extra) |
| 20 | self._protocol = protocol |
| 21 | self._loop = loop |
| 22 | |
| 23 | self._pipes = {} |
| 24 | if stdin == subprocess.PIPE: |
| 25 | self._pipes[STDIN] = None |
| 26 | if stdout == subprocess.PIPE: |
| 27 | self._pipes[STDOUT] = None |
| 28 | if stderr == subprocess.PIPE: |
| 29 | self._pipes[STDERR] = None |
| 30 | self._pending_calls = collections.deque() |
| 31 | self._finished = False |
| 32 | self._returncode = None |
| 33 | self._start(args=args, shell=shell, stdin=stdin, stdout=stdout, |
| 34 | stderr=stderr, bufsize=bufsize, **kwargs) |
| 35 | self._extra['subprocess'] = self._proc |
| 36 | |
| 37 | def _start(self, args, shell, stdin, stdout, stderr, bufsize, **kwargs): |
| 38 | raise NotImplementedError |
| 39 | |
| 40 | def _make_write_subprocess_pipe_proto(self, fd): |
| 41 | raise NotImplementedError |
| 42 | |
| 43 | def _make_read_subprocess_pipe_proto(self, fd): |
| 44 | raise NotImplementedError |
| 45 | |
| 46 | def close(self): |
| 47 | for proto in self._pipes.values(): |
| 48 | proto.pipe.close() |
| 49 | if self._returncode is None: |
| 50 | self.terminate() |
| 51 | |
| 52 | def get_pid(self): |
| 53 | return self._proc.pid |
| 54 | |
| 55 | def get_returncode(self): |
| 56 | return self._returncode |
| 57 | |
| 58 | def get_pipe_transport(self, fd): |
| 59 | if fd in self._pipes: |
| 60 | return self._pipes[fd].pipe |
| 61 | else: |
| 62 | return None |
| 63 | |
| 64 | def send_signal(self, signal): |
| 65 | self._proc.send_signal(signal) |
| 66 | |
| 67 | def terminate(self): |
| 68 | self._proc.terminate() |
| 69 | |
| 70 | def kill(self): |
| 71 | self._proc.kill() |
| 72 | |
| 73 | @tasks.coroutine |
| 74 | def _post_init(self): |
| 75 | proc = self._proc |
| 76 | loop = self._loop |
| 77 | if proc.stdin is not None: |
Victor Stinner | aaabc4f | 2014-01-29 14:22:56 -0800 | [diff] [blame^] | 78 | _, pipe = yield from loop.connect_write_pipe( |
Guido van Rossum | 0016e1d | 2013-10-30 14:56:49 -0700 | [diff] [blame] | 79 | lambda: WriteSubprocessPipeProto(self, STDIN), |
| 80 | proc.stdin) |
Victor Stinner | aaabc4f | 2014-01-29 14:22:56 -0800 | [diff] [blame^] | 81 | self._pipes[STDIN] = pipe |
Guido van Rossum | 0016e1d | 2013-10-30 14:56:49 -0700 | [diff] [blame] | 82 | if proc.stdout is not None: |
Victor Stinner | aaabc4f | 2014-01-29 14:22:56 -0800 | [diff] [blame^] | 83 | _, pipe = yield from loop.connect_read_pipe( |
Guido van Rossum | 0016e1d | 2013-10-30 14:56:49 -0700 | [diff] [blame] | 84 | lambda: ReadSubprocessPipeProto(self, STDOUT), |
| 85 | proc.stdout) |
Victor Stinner | aaabc4f | 2014-01-29 14:22:56 -0800 | [diff] [blame^] | 86 | self._pipes[STDOUT] = pipe |
Guido van Rossum | 0016e1d | 2013-10-30 14:56:49 -0700 | [diff] [blame] | 87 | if proc.stderr is not None: |
Victor Stinner | aaabc4f | 2014-01-29 14:22:56 -0800 | [diff] [blame^] | 88 | _, pipe = yield from loop.connect_read_pipe( |
Guido van Rossum | 0016e1d | 2013-10-30 14:56:49 -0700 | [diff] [blame] | 89 | lambda: ReadSubprocessPipeProto(self, STDERR), |
| 90 | proc.stderr) |
Victor Stinner | aaabc4f | 2014-01-29 14:22:56 -0800 | [diff] [blame^] | 91 | self._pipes[STDERR] = pipe |
| 92 | |
| 93 | assert self._pending_calls is not None |
| 94 | |
| 95 | self._loop.call_soon(self._protocol.connection_made, self) |
| 96 | for callback, data in self._pending_calls: |
| 97 | self._loop.call_soon(callback, *data) |
| 98 | self._pending_calls = None |
Guido van Rossum | 0016e1d | 2013-10-30 14:56:49 -0700 | [diff] [blame] | 99 | |
| 100 | def _call(self, cb, *data): |
| 101 | if self._pending_calls is not None: |
| 102 | self._pending_calls.append((cb, data)) |
| 103 | else: |
| 104 | self._loop.call_soon(cb, *data) |
| 105 | |
Guido van Rossum | 0016e1d | 2013-10-30 14:56:49 -0700 | [diff] [blame] | 106 | def _pipe_connection_lost(self, fd, exc): |
| 107 | self._call(self._protocol.pipe_connection_lost, fd, exc) |
| 108 | self._try_finish() |
| 109 | |
| 110 | def _pipe_data_received(self, fd, data): |
| 111 | self._call(self._protocol.pipe_data_received, fd, data) |
| 112 | |
| 113 | def _process_exited(self, returncode): |
| 114 | assert returncode is not None, returncode |
| 115 | assert self._returncode is None, self._returncode |
| 116 | self._returncode = returncode |
Guido van Rossum | 0016e1d | 2013-10-30 14:56:49 -0700 | [diff] [blame] | 117 | self._call(self._protocol.process_exited) |
| 118 | self._try_finish() |
| 119 | |
| 120 | def _try_finish(self): |
| 121 | assert not self._finished |
| 122 | if self._returncode is None: |
| 123 | return |
| 124 | if all(p is not None and p.disconnected |
| 125 | for p in self._pipes.values()): |
| 126 | self._finished = True |
| 127 | self._loop.call_soon(self._call_connection_lost, None) |
| 128 | |
| 129 | def _call_connection_lost(self, exc): |
| 130 | try: |
| 131 | self._protocol.connection_lost(exc) |
| 132 | finally: |
| 133 | self._proc = None |
| 134 | self._protocol = None |
| 135 | self._loop = None |
| 136 | |
| 137 | |
| 138 | class WriteSubprocessPipeProto(protocols.BaseProtocol): |
Guido van Rossum | 0016e1d | 2013-10-30 14:56:49 -0700 | [diff] [blame] | 139 | |
| 140 | def __init__(self, proc, fd): |
| 141 | self.proc = proc |
| 142 | self.fd = fd |
Victor Stinner | aaabc4f | 2014-01-29 14:22:56 -0800 | [diff] [blame^] | 143 | self.pipe = None |
Guido van Rossum | 0016e1d | 2013-10-30 14:56:49 -0700 | [diff] [blame] | 144 | self.disconnected = False |
Guido van Rossum | 0016e1d | 2013-10-30 14:56:49 -0700 | [diff] [blame] | 145 | |
| 146 | def connection_made(self, transport): |
Guido van Rossum | 0016e1d | 2013-10-30 14:56:49 -0700 | [diff] [blame] | 147 | self.pipe = transport |
Guido van Rossum | 0016e1d | 2013-10-30 14:56:49 -0700 | [diff] [blame] | 148 | |
| 149 | def connection_lost(self, exc): |
| 150 | self.disconnected = True |
| 151 | self.proc._pipe_connection_lost(self.fd, exc) |
| 152 | |
| 153 | def eof_received(self): |
| 154 | pass |
| 155 | |
| 156 | |
| 157 | class ReadSubprocessPipeProto(WriteSubprocessPipeProto, |
| 158 | protocols.Protocol): |
| 159 | |
| 160 | def data_received(self, data): |
| 161 | self.proc._pipe_data_received(self.fd, data) |