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[ d d d � Z d d d � Z d d d � Z n@ d d d � Z d d d � Z d d d � Z e j d d g � d S( sn Spawn a command with pipes to its stdin, stdout, and optionally stderr.
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file interface to just the input or output of the process depending on
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C s; t � | | _ t j � \ } } t j � \ } } | rO t j � \ } } n t j � | _ | j d k r� t j | d � t j | d � | r� t j | d � n | j | � n t j | � t j | d | � | _
t j | � t j | d | � | _ | r.t j | � t j | d | � | _ n d | _ d S( sd The parameter 'cmd' is the shell command to execute in a
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be a sequence, in which case arguments will be passed directly to the
program without shell intervention (as with os.spawnv()). If 'cmd' is a
string it will be passed to the shell (as with os.system()). If
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file objects (child_stdout, child_stdin) are returned.( R R ( R R t modeR R ( ( s /usr/lib64/python2.7/popen2.pyR � s c C s+ t j | | | � \ } } } | | | f S( s� Execute the shell command 'cmd' in a sub-process. On UNIX, 'cmd' may
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