<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> <head> <title>11.2.7 Installing your CGI script on a Unix system</title> <META NAME="description" CONTENT="11.2.7 Installing your CGI script on a Unix system"> <META NAME="keywords" CONTENT="lib"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <meta http-equiv="Content-Type" content="text/html; charset="> <link rel="STYLESHEET" href="lib.css"> <link rel="first" href="lib.html"> <link rel="contents" href="contents.html" title="Contents"> <link rel="index" href="genindex.html" title="Index"> <LINK REL="next" HREF="node301.html"> <LINK REL="previous" href="cgi-security.html"> <LINK REL="up" href="module-cgi.html"> <LINK REL="next" HREF="node301.html"> </head> <body> <DIV CLASS="navigation"> <table align="center" width="100%" cellpadding="0" cellspacing="2"> <tr> <td><A href="cgi-security.html"><img src="../icons/previous.gif" border="0" height="32" alt="Previous Page" width="32"></A></td> <td><A href="module-cgi.html"><img src="../icons/up.gif" border="0" height="32" alt="Up One Level" width="32"></A></td> <td><A HREF="node301.html"><img src="../icons/next.gif" border="0" height="32" alt="Next Page" width="32"></A></td> <td align="center" width="100%">Python Library Reference</td> <td><A href="contents.html"><img src="../icons/contents.gif" border="0" height="32" alt="Contents" width="32"></A></td> <td><a href="modindex.html" title="Module Index"><img src="../icons/modules.gif" border="0" height="32" alt="Module Index" width="32"></a></td> <td><A href="genindex.html"><img src="../icons/index.gif" border="0" height="32" alt="Index" width="32"></A></td> </tr></table> <b class="navlabel">Previous:</b> <a class="sectref" href="cgi-security.html">11.2.6 Caring about security</A> <b class="navlabel">Up:</b> <a class="sectref" href="module-cgi.html">11.2 cgi </A> <b class="navlabel">Next:</b> <a class="sectref" HREF="node301.html">11.2.8 Testing your CGI</A> <br><hr> </DIV> <!--End of Navigation Panel--> <H2><A NAME="SECTION0013270000000000000000"> 11.2.7 Installing your CGI script on a Unix system</A> </H2> <P> Read the documentation for your HTTP server and check with your local system administrator to find the directory where CGI scripts should be installed; usually this is in a directory <span class="file">cgi-bin</span> in the server tree. <P> Make sure that your script is readable and executable by ``others''; the Unix file mode should be <code>0755</code> octal (use "<tt class="samp">chmod 0755 <var>filename</var></tt>"). Make sure that the first line of the script contains <code>#!</code> starting in column 1 followed by the pathname of the Python interpreter, for instance: <P> <dl><dd><pre class="verbatim"> #!/usr/bin/python </pre></dl> <P> Make sure the Python interpreter exists and is executable by ``others''. <P> Make sure that any files your script needs to read or write are readable or writable, respectively, by ``others'' -- their mode should be <code>0644</code> for readable and <code>0666</code> for writable. This is because, for security reasons, the HTTP server executes your script as user ``nobody'', without any special privileges. It can only read (write, execute) files that everybody can read (write, execute). The current directory at execution time is also different (it is usually the server's cgi-bin directory) and the set of environment variables is also different from what you get when you log in. In particular, don't count on the shell's search path for executables (<a class="envvar" name="l2h-2300">PATH</a>) or the Python module search path (<a class="envvar" name="l2h-2301">PYTHONPATH</a>) to be set to anything interesting. <P> If you need to load modules from a directory which is not on Python's default module search path, you can change the path in your script, before importing other modules. For example: <P> <dl><dd><pre class="verbatim"> import sys sys.path.insert(0, "/usr/home/joe/lib/python") sys.path.insert(0, "/usr/local/lib/python") </pre></dl> <P> (This way, the directory inserted last will be searched first!) <P> Instructions for non-Unix systems will vary; check your HTTP server's documentation (it will usually have a section on CGI scripts). <P> <DIV CLASS="navigation"> <p><hr> <table align="center" width="100%" cellpadding="0" cellspacing="2"> <tr> <td><A href="cgi-security.html"><img src="../icons/previous.gif" border="0" height="32" alt="Previous Page" width="32"></A></td> <td><A href="module-cgi.html"><img src="../icons/up.gif" border="0" height="32" alt="Up One Level" width="32"></A></td> <td><A HREF="node301.html"><img src="../icons/next.gif" border="0" height="32" alt="Next Page" width="32"></A></td> <td align="center" width="100%">Python Library Reference</td> <td><A href="contents.html"><img src="../icons/contents.gif" border="0" height="32" alt="Contents" width="32"></A></td> <td><a href="modindex.html" title="Module Index"><img src="../icons/modules.gif" border="0" height="32" alt="Module Index" width="32"></a></td> <td><A href="genindex.html"><img src="../icons/index.gif" border="0" height="32" alt="Index" width="32"></A></td> </tr></table> <b class="navlabel">Previous:</b> <a class="sectref" href="cgi-security.html">11.2.6 Caring about security</A> <b class="navlabel">Up:</b> <a class="sectref" href="module-cgi.html">11.2 cgi </A> <b class="navlabel">Next:</b> <a class="sectref" HREF="node301.html">11.2.8 Testing your CGI</A> <hr> <span class="release-info">Release 2.2, documentation updated on December 21, 2001.</span> </DIV> <!--End of Navigation Panel--> <ADDRESS> See <i><a href="about.html">About this document...</a></i> for information on suggesting changes. </ADDRESS> </BODY> </HTML>
