/usr/lib/python2.7/dist-packages/IPython/utils/_process_win32.py is in python-ipython 5.1.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | """Windows-specific implementation of process utilities.
This file is only meant to be imported by process.py, not by end-users.
"""
#-----------------------------------------------------------------------------
# Copyright (C) 2010-2011 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
from __future__ import print_function
# stdlib
import os
import sys
import ctypes
from ctypes import c_int, POINTER
from ctypes.wintypes import LPCWSTR, HLOCAL
from subprocess import STDOUT
# our own imports
from ._process_common import read_no_interrupt, process_handler, arg_split as py_arg_split
from . import py3compat
from .encoding import DEFAULT_ENCODING
#-----------------------------------------------------------------------------
# Function definitions
#-----------------------------------------------------------------------------
class AvoidUNCPath(object):
"""A context manager to protect command execution from UNC paths.
In the Win32 API, commands can't be invoked with the cwd being a UNC path.
This context manager temporarily changes directory to the 'C:' drive on
entering, and restores the original working directory on exit.
The context manager returns the starting working directory *if* it made a
change and None otherwise, so that users can apply the necessary adjustment
to their system calls in the event of a change.
Examples
--------
::
cmd = 'dir'
with AvoidUNCPath() as path:
if path is not None:
cmd = '"pushd %s &&"%s' % (path, cmd)
os.system(cmd)
"""
def __enter__(self):
self.path = py3compat.getcwd()
self.is_unc_path = self.path.startswith(r"\\")
if self.is_unc_path:
# change to c drive (as cmd.exe cannot handle UNC addresses)
os.chdir("C:")
return self.path
else:
# We return None to signal that there was no change in the working
# directory
return None
def __exit__(self, exc_type, exc_value, traceback):
if self.is_unc_path:
os.chdir(self.path)
def _find_cmd(cmd):
"""Find the full path to a .bat or .exe using the win32api module."""
try:
from win32api import SearchPath
except ImportError:
raise ImportError('you need to have pywin32 installed for this to work')
else:
PATH = os.environ['PATH']
extensions = ['.exe', '.com', '.bat', '.py']
path = None
for ext in extensions:
try:
path = SearchPath(PATH, cmd, ext)[0]
except:
pass
if path is None:
raise OSError("command %r not found" % cmd)
else:
return path
def _system_body(p):
"""Callback for _system."""
enc = DEFAULT_ENCODING
for line in read_no_interrupt(p.stdout).splitlines():
line = line.decode(enc, 'replace')
print(line, file=sys.stdout)
for line in read_no_interrupt(p.stderr).splitlines():
line = line.decode(enc, 'replace')
print(line, file=sys.stderr)
# Wait to finish for returncode
return p.wait()
def system(cmd):
"""Win32 version of os.system() that works with network shares.
Note that this implementation returns None, as meant for use in IPython.
Parameters
----------
cmd : str or list
A command to be executed in the system shell.
Returns
-------
None : we explicitly do NOT return the subprocess status code, as this
utility is meant to be used extensively in IPython, where any return value
would trigger :func:`sys.displayhook` calls.
"""
# The controller provides interactivity with both
# stdin and stdout
#import _process_win32_controller
#_process_win32_controller.system(cmd)
with AvoidUNCPath() as path:
if path is not None:
cmd = '"pushd %s &&"%s' % (path, cmd)
return process_handler(cmd, _system_body)
def getoutput(cmd):
"""Return standard output of executing cmd in a shell.
Accepts the same arguments as os.system().
Parameters
----------
cmd : str or list
A command to be executed in the system shell.
Returns
-------
stdout : str
"""
with AvoidUNCPath() as path:
if path is not None:
cmd = '"pushd %s &&"%s' % (path, cmd)
out = process_handler(cmd, lambda p: p.communicate()[0], STDOUT)
if out is None:
out = b''
return py3compat.bytes_to_str(out)
try:
CommandLineToArgvW = ctypes.windll.shell32.CommandLineToArgvW
CommandLineToArgvW.arg_types = [LPCWSTR, POINTER(c_int)]
CommandLineToArgvW.restype = POINTER(LPCWSTR)
LocalFree = ctypes.windll.kernel32.LocalFree
LocalFree.res_type = HLOCAL
LocalFree.arg_types = [HLOCAL]
def arg_split(commandline, posix=False, strict=True):
"""Split a command line's arguments in a shell-like manner.
This is a special version for windows that use a ctypes call to CommandLineToArgvW
to do the argv splitting. The posix paramter is ignored.
If strict=False, process_common.arg_split(...strict=False) is used instead.
"""
#CommandLineToArgvW returns path to executable if called with empty string.
if commandline.strip() == "":
return []
if not strict:
# not really a cl-arg, fallback on _process_common
return py_arg_split(commandline, posix=posix, strict=strict)
argvn = c_int()
result_pointer = CommandLineToArgvW(py3compat.cast_unicode(commandline.lstrip()), ctypes.byref(argvn))
result_array_type = LPCWSTR * argvn.value
result = [arg for arg in result_array_type.from_address(ctypes.addressof(result_pointer.contents))]
retval = LocalFree(result_pointer)
return result
except AttributeError:
arg_split = py_arg_split
def check_pid(pid):
# OpenProcess returns 0 if no such process (of ours) exists
# positive int otherwise
return bool(ctypes.windll.kernel32.OpenProcess(1,0,pid))
|