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Updated documentation relating to the various flavors of popen[234]()

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for Windows & Unix.
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Fred Drake 2000-09-28 20:27:51 +00:00
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Doc/lib/libos.tex
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@ -296,6 +296,36 @@ Availability: \UNIX{}.
\end{funcdesc}
For each of these \function{popen()} variants, if \var{bufsize} is
specified, it specifies the buffer size for the I/O pipes.
\var{mode}, if provided, should be the string \code{'b'} or
\code{'t'}; on Windows this is needed to determine whether the file
objects should be opened in binary or text mode. The default value
for \var{mode} is \code{'t'}.
\begin{funcdesc}{popen2}{cmd\optional{, bufsize\optional{, mode}}}
Executes \var{cmd} as a sub-process. Returns the file objects
\code{(\var{child_stdin}, \var{child_stdout})}.
\versionadded{2.0}
\end{funcdesc}
\begin{funcdesc}{popen3}{cmd\optional{, bufsize\optional{, mode}}}
Executes \var{cmd} as a sub-process. Returns the file objects
\code{(\var{child_stdin}, \var{child_stdout}, \var{child_stderr})}.
\versionadded{2.0}
\end{funcdesc}
\begin{funcdesc}{popen4}{cmd\optional{, bufsize\optional{, mode}}}
Executes \var{cmd} as a sub-process. Returns the file objects
\code{(\var{child_stdin}, \var{child_stdout_and_stderr})}.
\versionadded{2.0}
\end{funcdesc}
This functionality is also available in the \refmodule{popen2} module
using functions of the same names, but the return values of those
functions have a different order.
\subsection{File Descriptor Operations \label{os-fd-ops}}
These functions operate on I/O streams referred to