代码拉取完成，页面将自动刷新
# uncompyle6 version 3.2.3
# Python bytecode 3.6 (3379)
# Decompiled from: Python 3.6.8 |Anaconda custom (64-bit)| (default, Feb 21 2019, 18:30:04) [MSC v.1916 64 bit (AMD64)]
# Embedded file name: subprocess.py
"""Subprocesses with accessible I/O streams
This module allows you to spawn processes, connect to their
input/output/error pipes, and obtain their return codes.
For a complete description of this module see the Python documentation.
Main API
========
run(...): Runs a command, waits for it to complete, then returns a
CompletedProcess instance.
Popen(...): A class for flexibly executing a command in a new process
Constants
---------
DEVNULL: Special value that indicates that os.devnull should be used
PIPE: Special value that indicates a pipe should be created
STDOUT: Special value that indicates that stderr should go to stdout
Older API
=========
call(...): Runs a command, waits for it to complete, then returns
the return code.
check_call(...): Same as call() but raises CalledProcessError()
if return code is not 0
check_output(...): Same as check_call() but returns the contents of
stdout instead of a return code
getoutput(...): Runs a command in the shell, waits for it to complete,
then returns the output
getstatusoutput(...): Runs a command in the shell, waits for it to complete,
then returns a (exitcode, output) tuple
"""
import sys
_mswindows = sys.platform == "win32"
import io, os, time, signal, builtins, warnings, errno
from time import monotonic as _time
class SubprocessError(Exception):
pass
class CalledProcessError(SubprocessError):
"""Raised when run() is called with check=True and the process
returns a non-zero exit status.
Attributes:
cmd, returncode, stdout, stderr, output
"""
def __init__(self, returncode, cmd, output=None, stderr=None):
self.returncode = returncode
self.cmd = cmd
self.output = output
self.stderr = stderr
def __str__(self):
if self.returncode:
if self.returncode < 0:
try:
return "Command '%s' died with %r." % (
self.cmd,
signal.Signals(-self.returncode),
)
except ValueError:
return "Command '%s' died with unknown signal %d." % (
self.cmd,
-self.returncode,
)
return "Command '%s' returned non-zero exit status %d." % (
self.cmd,
self.returncode,
)
@property
def stdout(self):
"""Alias for output attribute, to match stderr"""
return self.output
@stdout.setter
def stdout(self, value):
self.output = value
class TimeoutExpired(SubprocessError):
"""This exception is raised when the timeout expires while waiting for a
child process.
Attributes:
cmd, output, stdout, stderr, timeout
"""
def __init__(self, cmd, timeout, output=None, stderr=None):
self.cmd = cmd
self.timeout = timeout
self.output = output
self.stderr = stderr
def __str__(self):
return "Command '%s' timed out after %s seconds" % (self.cmd, self.timeout)
@property
def stdout(self):
return self.output
@stdout.setter
def stdout(self, value):
self.output = value
if _mswindows:
import threading, msvcrt, _winapi
class STARTUPINFO:
dwFlags = 0
hStdInput = None
hStdOutput = None
hStdError = None
wShowWindow = 0
else:
import _posixsubprocess, select, selectors
try:
import threading
except ImportError:
import dummy_threading as threading
_PIPE_BUF = getattr(select, "PIPE_BUF", 512)
if hasattr(selectors, "PollSelector"):
_PopenSelector = selectors.PollSelector
else:
_PopenSelector = selectors.SelectSelector
__all__ = [
"Popen",
"PIPE",
"STDOUT",
"call",
"check_call",
"getstatusoutput",
"getoutput",
"check_output",
"run",
"CalledProcessError",
"DEVNULL",
"SubprocessError",
"TimeoutExpired",
"CompletedProcess",
]
if _mswindows:
from _winapi import (
CREATE_NEW_CONSOLE,
CREATE_NEW_PROCESS_GROUP,
STD_INPUT_HANDLE,
STD_OUTPUT_HANDLE,
STD_ERROR_HANDLE,
SW_HIDE,
STARTF_USESTDHANDLES,
STARTF_USESHOWWINDOW,
)
__all__.extend(
[
"CREATE_NEW_CONSOLE",
"CREATE_NEW_PROCESS_GROUP",
"STD_INPUT_HANDLE",
"STD_OUTPUT_HANDLE",
"STD_ERROR_HANDLE",
"SW_HIDE",
"STARTF_USESTDHANDLES",
"STARTF_USESHOWWINDOW",
"STARTUPINFO",
]
)
class Handle(int):
closed = False
def Close(self, CloseHandle=_winapi.CloseHandle):
if not self.closed:
self.closed = True
CloseHandle(self)
def Detach(self):
if not self.closed:
self.closed = True
return int(self)
raise ValueError("already closed")
def __repr__(self):
return "%s(%d)" % (self.__class__.__name__, int(self))
__del__ = Close
__str__ = __repr__
_active = []
def _cleanup():
for inst in _active[:]:
res = inst._internal_poll(_deadstate=sys.maxsize)
if res is not None:
try:
_active.remove(inst)
except ValueError:
pass
PIPE = -1
STDOUT = -2
DEVNULL = -3
def _optim_args_from_interpreter_flags():
"""Return a list of command-line arguments reproducing the current
optimization settings in sys.flags."""
args = []
value = sys.flags.optimize
if value > 0:
args.append("-" + "O" * value)
return args
def _args_from_interpreter_flags():
"""Return a list of command-line arguments reproducing the current
settings in sys.flags and sys.warnoptions."""
flag_opt_map = {
"debug": "d",
"dont_write_bytecode": "B",
"no_user_site": "s",
"no_site": "S",
"ignore_environment": "E",
"verbose": "v",
"bytes_warning": "b",
"quiet": "q",
}
args = _optim_args_from_interpreter_flags()
for flag, opt in flag_opt_map.items():
v = getattr(sys.flags, flag)
if v > 0:
args.append("-" + opt * v)
for opt in sys.warnoptions:
args.append("-W" + opt)
return args
def call(*popenargs, timeout=None ** kwargs):
"""Run command with arguments. Wait for command to complete or
timeout, then return the returncode attribute.
The arguments are the same as for the Popen constructor. Example:
retcode = call(["ls", "-l"])
"""
with Popen(*popenargs, **kwargs) as (p):
try:
return p.wait(timeout=timeout)
except:
p.kill()
p.wait()
raise
def check_call(*popenargs, **kwargs):
"""Run command with arguments. Wait for command to complete. If
the exit code was zero then return, otherwise raise
CalledProcessError. The CalledProcessError object will have the
return code in the returncode attribute.
The arguments are the same as for the call function. Example:
check_call(["ls", "-l"])
"""
retcode = call(*popenargs, **kwargs)
if retcode:
cmd = kwargs.get("args")
if cmd is None:
cmd = popenargs[0]
raise CalledProcessError(retcode, cmd)
return 0
def check_output(*popenargs, timeout=None ** kwargs):
r"""Run command with arguments and return its output.
If the exit code was non-zero it raises a CalledProcessError. The
CalledProcessError object will have the return code in the returncode
attribute and output in the output attribute.
The arguments are the same as for the Popen constructor. Example:
>>> check_output(["ls", "-l", "/dev/null"])
b'crw-rw-rw- 1 root root 1, 3 Oct 18 2007 /dev/null\n'
The stdout argument is not allowed as it is used internally.
To capture standard error in the result, use stderr=STDOUT.
>>> check_output(["/bin/sh", "-c",
... "ls -l non_existent_file ; exit 0"],
... stderr=STDOUT)
b'ls: non_existent_file: No such file or directory\n'
There is an additional optional argument, "input", allowing you to
pass a string to the subprocess's stdin. If you use this argument
you may not also use the Popen constructor's "stdin" argument, as
it too will be used internally. Example:
>>> check_output(["sed", "-e", "s/foo/bar/"],
... input=b"when in the course of fooman events\n")
b'when in the course of barman events\n'
If universal_newlines=True is passed, the "input" argument must be a
string and the return value will be a string rather than bytes.
"""
if "stdout" in kwargs:
raise ValueError("stdout argument not allowed, it will be overridden.")
if "input" in kwargs:
if kwargs["input"] is None:
kwargs["input"] = "" if kwargs.get("universal_newlines", False) else b""
return (run(stdout=PIPE, timeout=timeout, check=True, **kwargs)).stdout
class CompletedProcess(object):
"""A process that has finished running.
This is returned by run().
Attributes:
args: The list or str args passed to run().
returncode: The exit code of the process, negative for signals.
stdout: The standard output (None if not captured).
stderr: The standard error (None if not captured).
"""
def __init__(self, args, returncode, stdout=None, stderr=None):
self.args = args
self.returncode = returncode
self.stdout = stdout
self.stderr = stderr
def __repr__(self):
args = [
("args={!r}").format(self.args),
("returncode={!r}").format(self.returncode),
]
if self.stdout is not None:
args.append(("stdout={!r}").format(self.stdout))
if self.stderr is not None:
args.append(("stderr={!r}").format(self.stderr))
return ("{}({})").format(type(self).__name__, (", ").join(args))
def check_returncode(self):
"""Raise CalledProcessError if the exit code is non-zero."""
if self.returncode:
raise CalledProcessError(
self.returncode, self.args, self.stdout, self.stderr
)
def run(*popenargs, input=None, timeout=None, check=False ** kwargs):
"""Run command with arguments and return a CompletedProcess instance.
The returned instance will have attributes args, returncode, stdout and
stderr. By default, stdout and stderr are not captured, and those attributes
will be None. Pass stdout=PIPE and/or stderr=PIPE in order to capture them.
If check is True and the exit code was non-zero, it raises a
CalledProcessError. The CalledProcessError object will have the return code
in the returncode attribute, and output & stderr attributes if those streams
were captured.
If timeout is given, and the process takes too long, a TimeoutExpired
exception will be raised.
There is an optional argument "input", allowing you to
pass a string to the subprocess's stdin. If you use this argument
you may not also use the Popen constructor's "stdin" argument, as
it will be used internally.
The other arguments are the same as for the Popen constructor.
If universal_newlines=True is passed, the "input" argument must be a
string and stdout/stderr in the returned object will be strings rather than
bytes.
"""
if input is not None:
if "stdin" in kwargs:
raise ValueError("stdin and input arguments may not both be used.")
kwargs["stdin"] = PIPE
with Popen(*popenargs, **kwargs) as (process):
try:
stdout, stderr = process.communicate(input, timeout=timeout)
except TimeoutExpired:
process.kill()
stdout, stderr = process.communicate()
raise TimeoutExpired(
process.args, timeout, output=stdout, stderr=stderr
)
except:
process.kill()
process.wait()
raise
retcode = process.poll()
if check:
if retcode:
raise CalledProcessError(
retcode, process.args, output=stdout, stderr=stderr
)
return CompletedProcess(process.args, retcode, stdout, stderr)
def list2cmdline(seq):
"""
Translate a sequence of arguments into a command line
string, using the same rules as the MS C runtime:
1) Arguments are delimited by white space, which is either a
space or a tab.
2) A string surrounded by double quotation marks is
interpreted as a single argument, regardless of white space
contained within. A quoted string can be embedded in an
argument.
3) A double quotation mark preceded by a backslash is
interpreted as a literal double quotation mark.
4) Backslashes are interpreted literally, unless they
immediately precede a double quotation mark.
5) If backslashes immediately precede a double quotation mark,
every pair of backslashes is interpreted as a literal
backslash. If the number of backslashes is odd, the last
backslash escapes the next double quotation mark as
described in rule 3.
"""
result = []
needquote = False
for arg in seq:
bs_buf = []
if result:
result.append(" ")
needquote = " " in arg or "\t" in arg or not arg
if needquote:
result.append('"')
for c in arg:
if c == "\\":
bs_buf.append(c)
elif c == '"':
result.append("\\" * len(bs_buf) * 2)
bs_buf = []
result.append('\\"')
else:
if bs_buf:
result.extend(bs_buf)
bs_buf = []
result.append(c)
if bs_buf:
result.extend(bs_buf)
if needquote:
result.extend(bs_buf)
result.append('"')
return ("").join(result)
def getstatusoutput(cmd):
"""Return (exitcode, output) of executing cmd in a shell.
Execute the string 'cmd' in a shell with 'check_output' and
return a 2-tuple (status, output). The locale encoding is used
to decode the output and process newlines.
A trailing newline is stripped from the output.
The exit status for the command can be interpreted
according to the rules for the function 'wait'. Example:
>>> import subprocess
>>> subprocess.getstatusoutput('ls /bin/ls')
(0, '/bin/ls')
>>> subprocess.getstatusoutput('cat /bin/junk')
(1, 'cat: /bin/junk: No such file or directory')
>>> subprocess.getstatusoutput('/bin/junk')
(127, 'sh: /bin/junk: not found')
>>> subprocess.getstatusoutput('/bin/kill $$')
(-15, '')
"""
try:
data = check_output(cmd, shell=True, universal_newlines=True, stderr=STDOUT)
exitcode = 0
except CalledProcessError as ex:
data = ex.output
exitcode = ex.returncode
if data[-1:] == "\n":
data = data[:-1]
return (exitcode, data)
def getoutput(cmd):
"""Return output (stdout or stderr) of executing cmd in a shell.
Like getstatusoutput(), except the exit status is ignored and the return
value is a string containing the command's output. Example:
>>> import subprocess
>>> subprocess.getoutput('ls /bin/ls')
'/bin/ls'
"""
return getstatusoutput(cmd)[1]
_PLATFORM_DEFAULT_CLOSE_FDS = object()
class Popen(object):
""" Execute a child program in a new process.
For a complete description of the arguments see the Python documentation.
Arguments:
args: A string, or a sequence of program arguments.
bufsize: supplied as the buffering argument to the open() function when
creating the stdin/stdout/stderr pipe file objects
executable: A replacement program to execute.
stdin, stdout and stderr: These specify the executed programs' standard
input, standard output and standard error file handles, respectively.
preexec_fn: (POSIX only) An object to be called in the child process
just before the child is executed.
close_fds: Controls closing or inheriting of file descriptors.
shell: If true, the command will be executed through the shell.
cwd: Sets the current directory before the child is executed.
env: Defines the environment variables for the new process.
universal_newlines: If true, use universal line endings for file
objects stdin, stdout and stderr.
startupinfo and creationflags (Windows only)
restore_signals (POSIX only)
start_new_session (POSIX only)
pass_fds (POSIX only)
encoding and errors: Text mode encoding and error handling to use for
file objects stdin, stdout and stderr.
Attributes:
stdin, stdout, stderr, pid, returncode
"""
_child_created = False
def __init__(
self,
args,
bufsize=-1,
executable=None,
stdin=None,
stdout=None,
stderr=None,
preexec_fn=None,
close_fds=_PLATFORM_DEFAULT_CLOSE_FDS,
shell=False,
cwd=None,
env=None,
universal_newlines=False,
startupinfo=None,
creationflags=0,
restore_signals=True,
start_new_session=False,
pass_fds=(),
*,
encoding=None,
errors=None
):
"""Create new Popen instance."""
_cleanup()
self._waitpid_lock = threading.Lock()
self._input = None
self._communication_started = False
if bufsize is None:
bufsize = -1
if not isinstance(bufsize, int):
raise TypeError("bufsize must be an integer")
if _mswindows:
if preexec_fn is not None:
raise ValueError("preexec_fn is not supported on Windows platforms")
any_stdio_set = (
stdin is not None or stdout is not None or stderr is not None
)
if close_fds is _PLATFORM_DEFAULT_CLOSE_FDS:
if any_stdio_set:
close_fds = False
else:
close_fds = True
else:
if close_fds:
if any_stdio_set:
raise ValueError(
"close_fds is not supported on Windows platforms if you redirect stdin/stdout/stderr"
)
else:
if close_fds is _PLATFORM_DEFAULT_CLOSE_FDS:
close_fds = True
if pass_fds:
if not close_fds:
warnings.warn(
"pass_fds overriding close_fds.", RuntimeWarning
)
close_fds = True
if startupinfo is not None:
raise ValueError(
"startupinfo is only supported on Windows platforms"
)
if creationflags != 0:
raise ValueError(
"creationflags is only supported on Windows platforms"
)
self.args = args
self.stdin = None
self.stdout = None
self.stderr = None
self.pid = None
self.returncode = None
self.universal_newlines = universal_newlines
self.encoding = encoding
self.errors = errors
p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite = self._get_handles(
stdin, stdout, stderr
)
if _mswindows:
if p2cwrite != -1:
p2cwrite = msvcrt.open_osfhandle(p2cwrite.Detach(), 0)
if c2pread != -1:
c2pread = msvcrt.open_osfhandle(c2pread.Detach(), 0)
if errread != -1:
errread = msvcrt.open_osfhandle(errread.Detach(), 0)
text_mode = encoding or errors or universal_newlines
self._closed_child_pipe_fds = False
try:
if p2cwrite != -1:
self.stdin = io.open(p2cwrite, "wb", bufsize)
if text_mode:
self.stdin = io.TextIOWrapper(
self.stdin,
write_through=True,
line_buffering=bufsize == 1,
encoding=encoding,
errors=errors,
)
if c2pread != -1:
self.stdout = io.open(c2pread, "rb", bufsize)
if text_mode:
self.stdout = io.TextIOWrapper(
self.stdout, encoding=encoding, errors=errors
)
if errread != -1:
self.stderr = io.open(errread, "rb", bufsize)
if text_mode:
self.stderr = io.TextIOWrapper(
self.stderr, encoding=encoding, errors=errors
)
self._execute_child(
args,
executable,
preexec_fn,
close_fds,
pass_fds,
cwd,
env,
startupinfo,
creationflags,
shell,
p2cread,
p2cwrite,
c2pread,
c2pwrite,
errread,
errwrite,
restore_signals,
start_new_session,
)
except:
for f in filter(None, (self.stdin, self.stdout, self.stderr)):
try:
f.close()
except OSError:
pass
if not self._closed_child_pipe_fds:
to_close = []
if stdin == PIPE:
to_close.append(p2cread)
if stdout == PIPE:
to_close.append(c2pwrite)
if stderr == PIPE:
to_close.append(errwrite)
if hasattr(self, "_devnull"):
to_close.append(self._devnull)
for fd in to_close:
try:
if _mswindows:
if isinstance(fd, Handle):
fd.Close()
os.close(fd)
except OSError:
pass
raise
def _translate_newlines(self, data, encoding, errors):
data = data.decode(encoding, errors)
return data.replace("\r\n", "\n").replace("\r", "\n")
def __enter__(self):
return self
def __exit__(self, type, value, traceback):
if self.stdout:
self.stdout.close()
if self.stderr:
self.stderr.close()
try:
if self.stdin:
self.stdin.close()
finally:
self.wait()
def __del__(self, _maxsize=sys.maxsize, _warn=warnings.warn):
if not self._child_created:
return
if self.returncode is None:
_warn(
"subprocess %s is still running" % self.pid,
ResourceWarning,
source=self,
)
self._internal_poll(_deadstate=_maxsize)
if self.returncode is None:
if _active is not None:
_active.append(self)
def _get_devnull(self):
if not hasattr(self, "_devnull"):
self._devnull = os.open(os.devnull, os.O_RDWR)
return self._devnull
def _stdin_write(self, input):
if input:
pass
try:
self.stdin.write(input)
except BrokenPipeError:
pass
except OSError as exc:
if exc.errno == errno.EINVAL:
pass
else:
raise
try:
self.stdin.close()
except BrokenPipeError:
pass
except OSError as exc:
if exc.errno == errno.EINVAL:
pass
else:
raise
def communicate(self, input=None, timeout=None):
"""Interact with process: Send data to stdin. Read data from
stdout and stderr, until end-of-file is reached. Wait for
process to terminate.
The optional "input" argument should be data to be sent to the
child process (if self.universal_newlines is True, this should
be a string; if it is False, "input" should be bytes), or
None, if no data should be sent to the child.
communicate() returns a tuple (stdout, stderr). These will be
bytes or, if self.universal_newlines was True, a string.
"""
if self._communication_started:
if input:
raise ValueError("Cannot send input after starting communication")
if timeout is None:
if not self._communication_started:
if [self.stdin, self.stdout, self.stderr].count(None) >= 2:
stdout = None
stderr = None
if self.stdin:
self._stdin_write(input)
else:
if self.stdout:
stdout = self.stdout.read()
self.stdout.close()
else:
if self.stderr:
stderr = self.stderr.read()
self.stderr.close()
self.wait()
if timeout is not None:
endtime = _time() + timeout
else:
endtime = None
try:
stdout, stderr = self._communicate(input, endtime, timeout)
finally:
self._communication_started = True
sts = self.wait(timeout=self._remaining_time(endtime))
return (stdout, stderr)
def poll(self):
"""Check if child process has terminated. Set and return returncode
attribute."""
return self._internal_poll()
def _remaining_time(self, endtime):
"""Convenience for _communicate when computing timeouts."""
if endtime is None:
return
else:
return endtime - _time()
def _check_timeout(self, endtime, orig_timeout):
"""Convenience for checking if a timeout has expired."""
if endtime is None:
return
if _time() > endtime:
raise TimeoutExpired(self.args, orig_timeout)
if _mswindows:
def _get_handles(self, stdin, stdout, stderr):
"""Construct and return tuple with IO objects:
p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite
"""
if stdin is None and stdout is None:
if stderr is None:
return (-1, -1, -1, -1, -1, -1)
p2cread, p2cwrite = (-1, -1)
c2pread, c2pwrite = (-1, -1)
errread, errwrite = (-1, -1)
if stdin is None:
p2cread = _winapi.GetStdHandle(_winapi.STD_INPUT_HANDLE)
if p2cread is None:
p2cread, _ = _winapi.CreatePipe(None, 0)
p2cread = Handle(p2cread)
_winapi.CloseHandle(_)
else:
if stdin == PIPE:
p2cread, p2cwrite = _winapi.CreatePipe(None, 0)
p2cread, p2cwrite = Handle(p2cread), Handle(p2cwrite)
else:
if stdin == DEVNULL:
p2cread = msvcrt.get_osfhandle(self._get_devnull())
else:
if isinstance(stdin, int):
p2cread = msvcrt.get_osfhandle(stdin)
else:
p2cread = msvcrt.get_osfhandle(stdin.fileno())
p2cread = self._make_inheritable(p2cread)
if stdout is None:
c2pwrite = _winapi.GetStdHandle(_winapi.STD_OUTPUT_HANDLE)
if c2pwrite is None:
_, c2pwrite = _winapi.CreatePipe(None, 0)
c2pwrite = Handle(c2pwrite)
_winapi.CloseHandle(_)
else:
if stdout == PIPE:
c2pread, c2pwrite = _winapi.CreatePipe(None, 0)
c2pread, c2pwrite = Handle(c2pread), Handle(c2pwrite)
else:
if stdout == DEVNULL:
c2pwrite = msvcrt.get_osfhandle(self._get_devnull())
else:
if isinstance(stdout, int):
c2pwrite = msvcrt.get_osfhandle(stdout)
else:
c2pwrite = msvcrt.get_osfhandle(stdout.fileno())
c2pwrite = self._make_inheritable(c2pwrite)
if stderr is None:
errwrite = _winapi.GetStdHandle(_winapi.STD_ERROR_HANDLE)
if errwrite is None:
_, errwrite = _winapi.CreatePipe(None, 0)
errwrite = Handle(errwrite)
_winapi.CloseHandle(_)
else:
if stderr == PIPE:
errread, errwrite = _winapi.CreatePipe(None, 0)
errread, errwrite = Handle(errread), Handle(errwrite)
else:
if stderr == STDOUT:
errwrite = c2pwrite
else:
if stderr == DEVNULL:
errwrite = msvcrt.get_osfhandle(
self._get_devnull()
)
else:
if isinstance(stderr, int):
errwrite = msvcrt.get_osfhandle(stderr)
else:
errwrite = msvcrt.get_osfhandle(
stderr.fileno()
)
errwrite = self._make_inheritable(errwrite)
return (
p2cread,
p2cwrite,
c2pread,
c2pwrite,
errread,
errwrite,
)
def _make_inheritable(self, handle):
"""Return a duplicate of handle, which is inheritable"""
h = _winapi.DuplicateHandle(
_winapi.GetCurrentProcess(),
handle,
_winapi.GetCurrentProcess(),
0,
1,
_winapi.DUPLICATE_SAME_ACCESS,
)
return Handle(h)
def _execute_child(
self,
args,
executable,
preexec_fn,
close_fds,
pass_fds,
cwd,
env,
startupinfo,
creationflags,
shell,
p2cread,
p2cwrite,
c2pread,
c2pwrite,
errread,
errwrite,
unused_restore_signals,
unused_start_new_session,
):
"""Execute program (MS Windows version)"""
if not not pass_fds:
raise AssertionError("pass_fds not supported on Windows.")
if not isinstance(args, str):
args = list2cmdline(args)
if startupinfo is None:
startupinfo = STARTUPINFO()
if -1 not in (p2cread, c2pwrite, errwrite):
startupinfo.dwFlags |= _winapi.STARTF_USESTDHANDLES
startupinfo.hStdInput = p2cread
startupinfo.hStdOutput = c2pwrite
startupinfo.hStdError = errwrite
if shell:
startupinfo.dwFlags |= _winapi.STARTF_USESHOWWINDOW
startupinfo.wShowWindow = _winapi.SW_HIDE
comspec = os.environ.get("COMSPEC", "cmd.exe")
args = ('{} /c "{}"').format(comspec, args)
try:
hp, ht, pid, tid = _winapi.CreateProcess(
executable,
args,
None,
None,
int(not close_fds),
creationflags,
env,
os.fspath(cwd) if cwd is not None else None,
startupinfo,
)
finally:
if p2cread != -1:
p2cread.Close()
if c2pwrite != -1:
c2pwrite.Close()
if errwrite != -1:
errwrite.Close()
if hasattr(self, "_devnull"):
os.close(self._devnull)
self._closed_child_pipe_fds = True
self._child_created = True
self._handle = Handle(hp)
self.pid = pid
_winapi.CloseHandle(ht)
def _internal_poll(
self,
_deadstate=None,
_WaitForSingleObject=_winapi.WaitForSingleObject,
_WAIT_OBJECT_0=_winapi.WAIT_OBJECT_0,
_GetExitCodeProcess=_winapi.GetExitCodeProcess,
):
"""Check if child process has terminated. Returns returncode
attribute.
This method is called by __del__, so it can only refer to objects
in its local scope.
"""
if self.returncode is None:
if _WaitForSingleObject(self._handle, 0) == _WAIT_OBJECT_0:
self.returncode = _GetExitCodeProcess(self._handle)
return self.returncode
def wait(self, timeout=None, endtime=None):
"""Wait for child process to terminate. Returns returncode
attribute."""
if endtime is not None:
warnings.warn(
"'endtime' argument is deprecated; use 'timeout'.",
DeprecationWarning,
stacklevel=2,
)
timeout = self._remaining_time(endtime)
if timeout is None:
timeout_millis = _winapi.INFINITE
else:
timeout_millis = int(timeout * 1000)
if self.returncode is None:
result = _winapi.WaitForSingleObject(self._handle, timeout_millis)
if result == _winapi.WAIT_TIMEOUT:
raise TimeoutExpired(self.args, timeout)
self.returncode = _winapi.GetExitCodeProcess(self._handle)
return self.returncode
def _readerthread(self, fh, buffer):
buffer.append(fh.read())
fh.close()
def _communicate(self, input, endtime, orig_timeout):
if self.stdout:
if not hasattr(self, "_stdout_buff"):
self._stdout_buff = []
self.stdout_thread = threading.Thread(
target=self._readerthread,
args=(self.stdout, self._stdout_buff),
)
self.stdout_thread.daemon = True
self.stdout_thread.start()
if self.stderr:
if not hasattr(self, "_stderr_buff"):
self._stderr_buff = []
self.stderr_thread = threading.Thread(
target=self._readerthread,
args=(self.stderr, self._stderr_buff),
)
self.stderr_thread.daemon = True
self.stderr_thread.start()
if self.stdin:
self._stdin_write(input)
if self.stdout is not None:
self.stdout_thread.join(self._remaining_time(endtime))
if self.stdout_thread.is_alive():
raise TimeoutExpired(self.args, orig_timeout)
if self.stderr is not None:
self.stderr_thread.join(self._remaining_time(endtime))
if self.stderr_thread.is_alive():
raise TimeoutExpired(self.args, orig_timeout)
stdout = None
stderr = None
if self.stdout:
stdout = self._stdout_buff
self.stdout.close()
if self.stderr:
stderr = self._stderr_buff
self.stderr.close()
if stdout is not None:
stdout = stdout[0]
if stderr is not None:
stderr = stderr[0]
return (stdout, stderr)
def send_signal(self, sig):
"""Send a signal to the process."""
if self.returncode is not None:
return
if sig == signal.SIGTERM:
self.terminate()
else:
if sig == signal.CTRL_C_EVENT:
os.kill(self.pid, signal.CTRL_C_EVENT)
else:
if sig == signal.CTRL_BREAK_EVENT:
os.kill(self.pid, signal.CTRL_BREAK_EVENT)
else:
raise ValueError(("Unsupported signal: {}").format(sig))
def terminate(self):
"""Terminates the process."""
if self.returncode is not None:
return
try:
_winapi.TerminateProcess(self._handle, 1)
except PermissionError:
rc = _winapi.GetExitCodeProcess(self._handle)
if rc == _winapi.STILL_ACTIVE:
raise
self.returncode = rc
kill = terminate
else:
def _get_handles(self, stdin, stdout, stderr):
"""Construct and return tuple with IO objects:
p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite
"""
p2cread, p2cwrite = (-1, -1)
c2pread, c2pwrite = (-1, -1)
errread, errwrite = (-1, -1)
if stdin is None:
pass
else:
if stdin == PIPE:
p2cread, p2cwrite = os.pipe()
else:
if stdin == DEVNULL:
p2cread = self._get_devnull()
else:
if isinstance(stdin, int):
p2cread = stdin
else:
p2cread = stdin.fileno()
if stdout is None:
pass
else:
if stdout == PIPE:
c2pread, c2pwrite = os.pipe()
else:
if stdout == DEVNULL:
c2pwrite = self._get_devnull()
else:
if isinstance(stdout, int):
c2pwrite = stdout
else:
c2pwrite = stdout.fileno()
if stderr is None:
pass
else:
if stderr == PIPE:
errread, errwrite = os.pipe()
else:
if stderr == STDOUT:
if c2pwrite != -1:
errwrite = c2pwrite
else:
errwrite = (
sys.__stdout__.fileno()
)
else:
if stderr == DEVNULL:
errwrite = self._get_devnull()
else:
if isinstance(stderr, int):
errwrite = stderr
else:
errwrite = stderr.fileno()
return (
p2cread,
p2cwrite,
c2pread,
c2pwrite,
errread,
errwrite,
)
def _execute_child(
self,
args,
executable,
preexec_fn,
close_fds,
pass_fds,
cwd,
env,
startupinfo,
creationflags,
shell,
p2cread,
p2cwrite,
c2pread,
c2pwrite,
errread,
errwrite,
restore_signals,
start_new_session,
):
"""Execute program (POSIX version)"""
if isinstance(args, (str, bytes)):
args = [args]
else:
args = list(args)
if shell:
args = ["/bin/sh", "-c"] + args
if executable:
args[0] = executable
if executable is None:
executable = args[0]
orig_executable = executable
errpipe_read, errpipe_write = os.pipe()
low_fds_to_close = []
while errpipe_write < 3:
low_fds_to_close.append(errpipe_write)
errpipe_write = os.dup(errpipe_write)
for low_fd in low_fds_to_close:
os.close(low_fd)
try:
try:
if env is not None:
env_list = []
for k, v in env.items():
k = os.fsencode(k)
if b"=" in k:
raise ValueError(
"illegal environment variable name"
)
env_list.append(k + b"=" + os.fsencode(v))
else:
env_list = None
executable = os.fsencode(executable)
if os.path.dirname(executable):
executable_list = (executable,)
else:
executable_list = tuple(
(
os.path.join(os.fsencode(dir), executable)
for dir in os.get_exec_path(env)
)
)
fds_to_keep = set(pass_fds)
fds_to_keep.add(errpipe_write)
self.pid = _posixsubprocess.fork_exec(
args,
executable_list,
close_fds,
tuple(sorted(map(int, fds_to_keep))),
cwd,
env_list,
p2cread,
p2cwrite,
c2pread,
c2pwrite,
errread,
errwrite,
errpipe_read,
errpipe_write,
restore_signals,
start_new_session,
preexec_fn,
)
self._child_created = True
finally:
os.close(errpipe_write)
devnull_fd = getattr(self, "_devnull", None)
if p2cread != -1:
if p2cwrite != -1:
if p2cread != devnull_fd:
os.close(p2cread)
if c2pwrite != -1:
if c2pread != -1:
if c2pwrite != devnull_fd:
os.close(c2pwrite)
if errwrite != -1:
if errread != -1:
if errwrite != devnull_fd:
os.close(errwrite)
if devnull_fd is not None:
os.close(devnull_fd)
self._closed_child_pipe_fds = True
errpipe_data = bytearray()
while 1:
part = os.read(errpipe_read, 50000)
errpipe_data += part
if not part or len(errpipe_data) > 50000:
break
finally:
os.close(errpipe_read)
if errpipe_data:
try:
pid, sts = os.waitpid(self.pid, 0)
if pid == self.pid:
self._handle_exitstatus(sts)
else:
self.returncode = sys.maxsize
except ChildProcessError:
pass
try:
exception_name, hex_errno, err_msg = errpipe_data.split(b":", 2)
err_msg = err_msg.decode()
except ValueError:
exception_name = b"SubprocessError"
hex_errno = b"0"
err_msg = ("Bad exception data from child: {!r}").format(
bytes(errpipe_data)
)
child_exception_type = getattr(
builtins, exception_name.decode("ascii"), SubprocessError
)
if issubclass(child_exception_type, OSError):
if hex_errno:
errno_num = int(hex_errno, 16)
child_exec_never_called = err_msg == "noexec"
if child_exec_never_called:
err_msg = ""
err_filename = cwd
else:
err_filename = orig_executable
if errno_num != 0:
err_msg = os.strerror(errno_num)
if errno_num == errno.ENOENT:
err_msg += ": " + repr(err_filename)
raise child_exception_type(errno_num, err_msg, err_filename)
raise child_exception_type(err_msg)
def _handle_exitstatus(
self,
sts,
_WIFSIGNALED=os.WIFSIGNALED,
_WTERMSIG=os.WTERMSIG,
_WIFEXITED=os.WIFEXITED,
_WEXITSTATUS=os.WEXITSTATUS,
_WIFSTOPPED=os.WIFSTOPPED,
_WSTOPSIG=os.WSTOPSIG,
):
"""All callers to this function MUST hold self._waitpid_lock."""
if _WIFSIGNALED(sts):
self.returncode = -_WTERMSIG(sts)
else:
if _WIFEXITED(sts):
self.returncode = _WEXITSTATUS(sts)
else:
if _WIFSTOPPED(sts):
self.returncode = -_WSTOPSIG(sts)
else:
raise SubprocessError("Unknown child exit status!")
def _internal_poll(
self,
_deadstate=None,
_waitpid=os.waitpid,
_WNOHANG=os.WNOHANG,
_ECHILD=errno.ECHILD,
):
"""Check if child process has terminated. Returns returncode
attribute.
This method is called by __del__, so it cannot reference anything
outside of the local scope (nor can any methods it calls).
"""
if self.returncode is None:
if not self._waitpid_lock.acquire(False):
return
try:
if self.returncode is not None:
return self.returncode
pid, sts = _waitpid(self.pid, _WNOHANG)
if pid == self.pid:
self._handle_exitstatus(sts)
except OSError as e:
if _deadstate is not None:
self.returncode = _deadstate
else:
if e.errno == _ECHILD:
self.returncode = 0
finally:
self._waitpid_lock.release()
return self.returncode
def _try_wait(self, wait_flags):
"""All callers to this function MUST hold self._waitpid_lock."""
try:
pid, sts = os.waitpid(self.pid, wait_flags)
except ChildProcessError:
pid = self.pid
sts = 0
return (pid, sts)
def wait(self, timeout=None, endtime=None):
"""Wait for child process to terminate. Returns returncode
attribute."""
if self.returncode is not None:
return self.returncode
else:
if endtime is not None:
warnings.warn(
"'endtime' argument is deprecated; use 'timeout'.",
DeprecationWarning,
stacklevel=2,
)
if endtime is not None or timeout is not None:
if endtime is None:
endtime = _time() + timeout
else:
if timeout is None:
timeout = self._remaining_time(endtime)
if endtime is not None:
delay = 0.0005
while True:
if self._waitpid_lock.acquire(False):
try:
if self.returncode is not None:
break
pid, sts = self._try_wait(os.WNOHANG)
if not pid == self.pid:
if not pid == 0:
raise AssertionError
if pid == self.pid:
self._handle_exitstatus(sts)
break
finally:
self._waitpid_lock.release()
remaining = self._remaining_time(endtime)
if remaining <= 0:
raise TimeoutExpired(self.args, timeout)
delay = min(delay * 2, remaining, 0.05)
time.sleep(delay)
else:
while self.returncode is None:
with self._waitpid_lock:
if self.returncode is not None:
break
pid, sts = self._try_wait(0)
if pid == self.pid:
self._handle_exitstatus(sts)
return self.returncode
def _communicate(self, input, endtime, orig_timeout):
if self.stdin and not self._communication_started:
try:
self.stdin.flush()
except BrokenPipeError:
pass
if not input:
try:
self.stdin.close()
except BrokenPipeError:
pass
stdout = None
stderr = None
if not self._communication_started:
self._fileobj2output = {}
if self.stdout:
self._fileobj2output[self.stdout] = []
if self.stderr:
self._fileobj2output[self.stderr] = []
if self.stdout:
stdout = self._fileobj2output[self.stdout]
if self.stderr:
stderr = self._fileobj2output[self.stderr]
self._save_input(input)
if self._input:
input_view = memoryview(self._input)
with _PopenSelector() as (selector):
if self.stdin:
if input:
selector.register(self.stdin, selectors.EVENT_WRITE)
if self.stdout:
selector.register(self.stdout, selectors.EVENT_READ)
if self.stderr:
selector.register(self.stderr, selectors.EVENT_READ)
while selector.get_map():
timeout = self._remaining_time(endtime)
if timeout is not None:
if timeout < 0:
raise TimeoutExpired(self.args, orig_timeout)
ready = selector.select(timeout)
self._check_timeout(endtime, orig_timeout)
for key, events in ready:
if key.fileobj is self.stdin:
chunk = input_view[
self._input_offset : self._input_offset
+ _PIPE_BUF
]
try:
self._input_offset += os.write(
key.fd, chunk
)
except BrokenPipeError:
selector.unregister(key.fileobj)
key.fileobj.close()
else:
if self._input_offset >= len(self._input):
selector.unregister(key.fileobj)
key.fileobj.close()
else:
if key.fileobj in (self.stdout, self.stderr):
data = os.read(key.fd, 32768)
if not data:
selector.unregister(key.fileobj)
key.fileobj.close()
self._fileobj2output[key.fileobj].append(
data
)
self.wait(timeout=self._remaining_time(endtime))
if stdout is not None:
stdout = (b"").join(stdout)
if stderr is not None:
stderr = (b"").join(stderr)
if self.encoding or self.errors or self.universal_newlines:
if stdout is not None:
stdout = self._translate_newlines(
stdout, self.stdout.encoding, self.stdout.errors
)
if stderr is not None:
stderr = self._translate_newlines(
stderr, self.stderr.encoding, self.stderr.errors
)
return (stdout, stderr)
def _save_input(self, input):
if self.stdin:
if self._input is None:
self._input_offset = 0
self._input = input
if input is not None:
if self.encoding or self.errors or self.universal_newlines:
self._input = self._input.encode(
self.stdin.encoding, self.stdin.errors
)
def send_signal(self, sig):
"""Send a signal to the process."""
if self.returncode is None:
os.kill(self.pid, sig)
def terminate(self):
"""Terminate the process with SIGTERM
"""
self.send_signal(signal.SIGTERM)
def kill(self):
"""Kill the process with SIGKILL
"""
self.send_signal(signal.SIGKILL)
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