Updated documentation relating to the various flavors of popen[234]()
for Windows & Unix.
diff --git a/Doc/lib/libpopen2.tex b/Doc/lib/libpopen2.tex
index e484d23..699308c 100644
--- a/Doc/lib/libpopen2.tex
+++ b/Doc/lib/libpopen2.tex
@@ -2,39 +2,53 @@
Subprocesses with accessible I/O streams}
\declaremodule{standard}{popen2}
- \platform{Unix}
+ \platform{Unix, Windows}
\modulesynopsis{Subprocesses with accessible standard I/O streams.}
\sectionauthor{Drew Csillag}{drew_csillag@geocities.com}
-This module allows you to spawn processes and connect their
-input/output/error pipes and obtain their return codes under \UNIX.
-Similar functionality exists for Windows platforms using the
-\module{win32pipe} module provided as part of Mark Hammond's Windows
-extensions.
+This module allows you to spawn processes and connect to their
+input/output/error pipes and obtain their return codes under
+\UNIX{} and Windows.
-The primary interface offered by this module is a pair of factory
-functions:
+Note that starting with Python 2.0, this functionality is available
+using functions from the \refmodule{os} module which have the same
+names as the factory functions here, but the order of the return
+values is more intuitive in the \refmodule{os} module variants.
-\begin{funcdesc}{popen2}{cmd\optional{, bufsize}}
-Executes \var{cmd} as a sub-process. If \var{bufsize} is specified,
-it specifies the buffer size for the I/O pipes. Returns the file
-objects \code{(\var{child_stdout}, \var{child_stdin})}.
+The primary interface offered by this module is a trio of factory
+functions. For each of these, 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_stdout}, \var{child_stdin})}.
\end{funcdesc}
-\begin{funcdesc}{popen3}{cmd\optional{, bufsize}}
-Executes \var{cmd} as a sub-process. If \var{bufsize} is specified,
-it specifies the buffer size for the I/O pipes. Returns the file
-objects \code{(\var{child_stdout}, \var{child_stdin},
-\var{child_stderr})}.
+\begin{funcdesc}{popen3}{cmd\optional{, bufsize\optional{, mode}}}
+Executes \var{cmd} as a sub-process. Returns the file objects
+\code{(\var{child_stdout}, \var{child_stdin}, \var{child_stderr})}.
\end{funcdesc}
-The class defining the objects returned by the factory functions is
-also available:
+\begin{funcdesc}{popen4}{cmd\optional{, bufsize\optional{, mode}}}
+Executes \var{cmd} as a sub-process. Returns the file objects
+\code{(\var{child_stdout_and_stderr}, \var{child_stdin})}.
+\versionadded{2.0}
+\end{funcdesc}
+
+
+On \UNIX, a class defining the objects returned by the factory
+functions is also available. These are not used for the Windows
+implementation, and are not available on that platform.
\begin{classdesc}{Popen3}{cmd\optional{, capturestderr\optional{, bufsize}}}
This class represents a child process. Normally, \class{Popen3}
-instances are created using the factory functions described above.
+instances are created using the \function{popen2()} and
+\function{popen3()} factory functions described above.
If not using one off the helper functions to create \class{Popen3}
objects, the parameter \var{cmd} is the shell command to execute in a
@@ -44,10 +58,18 @@
specifies the size of the I/O buffers to/from the child process.
\end{classdesc}
+\begin{classdesc}{Popen4}{cmd\optional{, bufsize}}
+Similar to \class{Popen3}, but always captures standard error into the
+same file object as standard output. These are typically created
+using \function{popen4()}.
+\versionadded{2.0}
+\end{classdesc}
-\subsection{Popen3 Objects \label{popen3-objects}}
-Instances of the \class{Popen3} class have the following methods:
+\subsection{Popen3 and Popen4 Objects \label{popen3-objects}}
+
+Instances of the \class{Popen3} and \class{Popen4} classes have the
+following methods:
\begin{methoddesc}{poll}{}
Returns \code{-1} if child process hasn't completed yet, or its return
@@ -59,10 +81,12 @@
\end{methoddesc}
-The following attributes of \class{Popen3} objects are also available:
+The following attributes are also available:
\begin{memberdesc}{fromchild}
-A file object that provides output from the child process.
+A file object that provides output from the child process. For
+\class{Popen4} instances, this will provide both the standard output
+and standard error streams.
\end{memberdesc}
\begin{memberdesc}{tochild}
@@ -72,6 +96,7 @@
\begin{memberdesc}{childerr}
Where the standard error from the child process goes is
\var{capturestderr} was true for the constructor, or \code{None}.
+This will always be \code{None} for \class{Popen4} instances.
\end{memberdesc}
\begin{memberdesc}{pid}