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This file is only meant to be imported by process.py, not by end-users.
� N)�c_int�POINTER)�LPCWSTR�HLOCAL)�STDOUT�TimeoutExpired)�Thread� )�read_no_interrupt�process_handler� arg_split)� py3compat)�DEFAULT_ENCODINGc � � e Zd ZdZd� Zd� Zy)� AvoidUNCPatha� 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)
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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
-------
int : child process' exit code.
N�"pushd � &&")r r r@ )�cmdr s r �systemrE f s: � �&
� � 2�4� � �'+�S�1�C� �s�L�1�2� 2� 2�s �/�8c � � t � 5 }|�d|�d| ��} t | d� t � }ddd� �d}t j |� S # 1 sw Y �"xY w)z�Return standard output of executing cmd in a shell.
Accepts the same arguments as os.system().
Parameters
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cmd : str or list
A command to be executed in the system shell.
Returns
-------
stdout : str
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� � t j |� � }t |j z }|j t j |j � � D �cg c] }|�� }}t |� }|S c c}w )a4 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 parameter is ignored.
If strict=False, process_common.arg_split(...strict=False) is used instead.
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