From 458120dd40db6b4df55a4e96b650e16798ef06a0 Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@localhost>
Date: Tue, 3 May 2011 11:25:13 +0000
Subject: add hg and python

---
 sys/src/cmd/python/Doc/lib/libcommands.tex | 62 ++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 sys/src/cmd/python/Doc/lib/libcommands.tex

(limited to 'sys/src/cmd/python/Doc/lib/libcommands.tex')

diff --git a/sys/src/cmd/python/Doc/lib/libcommands.tex b/sys/src/cmd/python/Doc/lib/libcommands.tex
new file mode 100644
index 000000000..53b8a2070
--- /dev/null
+++ b/sys/src/cmd/python/Doc/lib/libcommands.tex
@@ -0,0 +1,62 @@
+\section{\module{commands} ---
+         Utilities for running commands}
+
+\declaremodule{standard}{commands}
+  \platform{Unix}
+\modulesynopsis{Utility functions for running external commands.}
+\sectionauthor{Sue Williams}{sbw@provis.com}
+
+
+The \module{commands} module contains wrapper functions for
+\function{os.popen()} which take a system command as a string and
+return any output generated by the command and, optionally, the exit
+status.
+
+The \module{subprocess} module provides more powerful facilities for
+spawning new processes and retrieving their results.  Using the
+\module{subprocess} module is preferable to using the \module{commands}
+module.
+
+The \module{commands} module defines the following functions:
+
+
+\begin{funcdesc}{getstatusoutput}{cmd}
+Execute the string \var{cmd} in a shell with \function{os.popen()} and
+return a 2-tuple \code{(\var{status}, \var{output})}.  \var{cmd} is
+actually run as \code{\{ \var{cmd} ; \} 2>\&1}, so that the returned
+output will contain output or error messages. A trailing newline is
+stripped from the output. The exit status for the command can be
+interpreted according to the rules for the C function
+\cfunction{wait()}.
+\end{funcdesc}
+
+\begin{funcdesc}{getoutput}{cmd}
+Like \function{getstatusoutput()}, except the exit status is ignored
+and the return value is a string containing the command's output.  
+\end{funcdesc}
+
+\begin{funcdesc}{getstatus}{file}
+Return the output of \samp{ls -ld \var{file}} as a string.  This
+function uses the \function{getoutput()} function, and properly
+escapes backslashes and dollar signs in the argument.
+\end{funcdesc}
+
+Example:
+
+\begin{verbatim}
+>>> import commands
+>>> commands.getstatusoutput('ls /bin/ls')
+(0, '/bin/ls')
+>>> commands.getstatusoutput('cat /bin/junk')
+(256, 'cat: /bin/junk: No such file or directory')
+>>> commands.getstatusoutput('/bin/junk')
+(256, 'sh: /bin/junk: not found')
+>>> commands.getoutput('ls /bin/ls')
+'/bin/ls'
+>>> commands.getstatus('/bin/ls')
+'-rwxr-xr-x  1 root        13352 Oct 14  1994 /bin/ls'
+\end{verbatim}
+
+\begin{seealso}
+  \seemodule{subprocess}{Module for spawning and managing subprocesses.}
+\end{seealso}
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