[OpenSPARC-T2-SAM] / sam-t2 / devtools / v9 / html / python / lib / node476.html

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<link rel="STYLESHEET" href="lib.css" type='text/css' />
<link rel="SHORTCUT ICON" href="../icons/pyfav.png" type="image/png" />
<link rel='start' href='../index.html' title='Python Documentation Index' />
<link rel="first" href="lib.html" title='Python Library Reference' />
<link rel='contents' href='contents.html' title="Contents" />
<link rel='index' href='genindex.html' title='Index' />
<link rel='last' href='about.html' title='About this document...' />
<link rel='help' href='about.html' title='About this document...' />
<link rel="next" href="node477.html" />
<link rel="prev" href="cgi-security.html" />
<link rel="parent" href="module-cgi.html" />
<link rel="next" href="node477.html" />
<meta name='aesop' content='information' />
<title>11.2.7 Installing your CGI script on a Unix system</title>
</head>
<body>
<DIV CLASS="navigation">
<div id='top-navigation-panel' xml:id='top-navigation-panel'>
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td class='online-navigation'><a rel="prev" title="11.2.6 Caring about security"
  href="cgi-security.html"><img src='../icons/previous.png'
  border='0' height='32'  alt='Previous Page' width='32' /></A></td>
<td class='online-navigation'><a rel="parent" title="11.2 cgi  "
  href="module-cgi.html"><img src='../icons/up.png'
  border='0' height='32'  alt='Up One Level' width='32' /></A></td>
<td class='online-navigation'><a rel="next" title="11.2.8 Testing your CGI"
  href="node477.html"><img src='../icons/next.png'
  border='0' height='32'  alt='Next Page' width='32' /></A></td>
<td align="center" width="100%">Python Library Reference</td>
<td class='online-navigation'><a rel="contents" title="Table of Contents"
  href="contents.html"><img src='../icons/contents.png'
  border='0' height='32'  alt='Contents' width='32' /></A></td>
<td class='online-navigation'><a href="modindex.html" title="Module Index"><img src='../icons/modules.png'
  border='0' height='32'  alt='Module Index' width='32' /></a></td>
<td class='online-navigation'><a rel="index" title="Index"
  href="genindex.html"><img src='../icons/index.png'
  border='0' height='32'  alt='Index' width='32' /></A></td>
</tr></table>
<div class='online-navigation'>
<b class="navlabel">Previous:</b>
<a class="sectref" rel="prev" href="cgi-security.html">11.2.6 Caring about security</A>
<b class="navlabel">Up:</b>
<a class="sectref" rel="parent" href="module-cgi.html">11.2 cgi  </A>
<b class="navlabel">Next:</b>
<a class="sectref" rel="next" href="node477.html">11.2.8 Testing your CGI</A>
</div>
<hr /></div>
</DIV>
<!--End of Navigation Panel-->

<H2><A NAME="SECTION0013270000000000000000">
11.2.7 Installing your CGI script on a <span class="Unix">Unix</span> 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
<span class="Unix">Unix</span> 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>
<div class="verbatim"><pre>
#!/usr/local/bin/python
</pre></div>

<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" id='l2h-3173' xml:id='l2h-3173'>PATH</a>) or
the Python module search path (<a class="envvar" id='l2h-3174' xml:id='l2h-3174'>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>
<div class="verbatim"><pre>
import sys
sys.path.insert(0, "/usr/home/joe/lib/python")
sys.path.insert(0, "/usr/local/lib/python")
</pre></div>

<P>
(This way, the directory inserted last will be searched first!)

<P>
Instructions for non-<span class="Unix">Unix</span> systems will vary; check your HTTP server's
documentation (it will usually have a section on CGI scripts).

<P>

<DIV CLASS="navigation">
<div class='online-navigation'>
<p></p><hr />
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td class='online-navigation'><a rel="prev" title="11.2.6 Caring about security"
  href="cgi-security.html"><img src='../icons/previous.png'
  border='0' height='32'  alt='Previous Page' width='32' /></A></td>
<td class='online-navigation'><a rel="parent" title="11.2 cgi  "
  href="module-cgi.html"><img src='../icons/up.png'
  border='0' height='32'  alt='Up One Level' width='32' /></A></td>
<td class='online-navigation'><a rel="next" title="11.2.8 Testing your CGI"
  href="node477.html"><img src='../icons/next.png'
  border='0' height='32'  alt='Next Page' width='32' /></A></td>
<td align="center" width="100%">Python Library Reference</td>
<td class='online-navigation'><a rel="contents" title="Table of Contents"
  href="contents.html"><img src='../icons/contents.png'
  border='0' height='32'  alt='Contents' width='32' /></A></td>
<td class='online-navigation'><a href="modindex.html" title="Module Index"><img src='../icons/modules.png'
  border='0' height='32'  alt='Module Index' width='32' /></a></td>
<td class='online-navigation'><a rel="index" title="Index"
  href="genindex.html"><img src='../icons/index.png'
  border='0' height='32'  alt='Index' width='32' /></A></td>
</tr></table>
<div class='online-navigation'>
<b class="navlabel">Previous:</b>
<a class="sectref" rel="prev" href="cgi-security.html">11.2.6 Caring about security</A>
<b class="navlabel">Up:</b>
<a class="sectref" rel="parent" href="module-cgi.html">11.2 cgi  </A>
<b class="navlabel">Next:</b>
<a class="sectref" rel="next" href="node477.html">11.2.8 Testing your CGI</A>
</div>
</div>
<hr />
<span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</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>
Commit	Line	Data
920dae64 AT	1	<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
	2	<html>
	3	<head>
	4	<link rel="STYLESHEET" href="lib.css" type='text/css' />
	5	<link rel="SHORTCUT ICON" href="../icons/pyfav.png" type="image/png" />
	6	<link rel='start' href='../index.html' title='Python Documentation Index' />
	7	<link rel="first" href="lib.html" title='Python Library Reference' />
	8	<link rel='contents' href='contents.html' title="Contents" />
	9	<link rel='index' href='genindex.html' title='Index' />
	10	<link rel='last' href='about.html' title='About this document...' />
	11	<link rel='help' href='about.html' title='About this document...' />
	12	<link rel="next" href="node477.html" />
	13	<link rel="prev" href="cgi-security.html" />
	14	<link rel="parent" href="module-cgi.html" />
	15	<link rel="next" href="node477.html" />
	16	<meta name='aesop' content='information' />
	17	<title>11.2.7 Installing your CGI script on a Unix system</title>
	18	</head>
	19	<body>
	20	<DIV CLASS="navigation">
	21	<div id='top-navigation-panel' xml:id='top-navigation-panel'>
	22	<table align="center" width="100%" cellpadding="0" cellspacing="2">
	23	<tr>
	24	<td class='online-navigation'><a rel="prev" title="11.2.6 Caring about security"
	25	href="cgi-security.html"><img src='../icons/previous.png'
	26	border='0' height='32' alt='Previous Page' width='32' /></A></td>
	27	<td class='online-navigation'><a rel="parent" title="11.2 cgi "
	28	href="module-cgi.html"><img src='../icons/up.png'
	29	border='0' height='32' alt='Up One Level' width='32' /></A></td>
	30	<td class='online-navigation'><a rel="next" title="11.2.8 Testing your CGI"
	31	href="node477.html"><img src='../icons/next.png'
	32	border='0' height='32' alt='Next Page' width='32' /></A></td>
	33	<td align="center" width="100%">Python Library Reference</td>
	34	<td class='online-navigation'><a rel="contents" title="Table of Contents"
	35	href="contents.html"><img src='../icons/contents.png'
	36	border='0' height='32' alt='Contents' width='32' /></A></td>
	37	<td class='online-navigation'><a href="modindex.html" title="Module Index"><img src='../icons/modules.png'
	38	border='0' height='32' alt='Module Index' width='32' /></a></td>
	39	<td class='online-navigation'><a rel="index" title="Index"
	40	href="genindex.html"><img src='../icons/index.png'
	41	border='0' height='32' alt='Index' width='32' /></A></td>
	42	</tr></table>
	43	<div class='online-navigation'>
	44	<b class="navlabel">Previous:</b>
	45	<a class="sectref" rel="prev" href="cgi-security.html">11.2.6 Caring about security</A>
	46	<b class="navlabel">Up:</b>
	47	<a class="sectref" rel="parent" href="module-cgi.html">11.2 cgi </A>
	48	<b class="navlabel">Next:</b>
	49	<a class="sectref" rel="next" href="node477.html">11.2.8 Testing your CGI</A>
	50	</div>
	51	<hr /></div>
	52	</DIV>
	53	<!--End of Navigation Panel-->
	54
	55	<H2><A NAME="SECTION0013270000000000000000">
	56	11.2.7 Installing your CGI script on a <span class="Unix">Unix</span> system</A>
	57	</H2>
	58
	59	<P>
	60	Read the documentation for your HTTP server and check with your local
	61	system administrator to find the directory where CGI scripts should be
	62	installed; usually this is in a directory <span class="file">cgi-bin</span> in the server tree.
	63
	64	<P>
65	Make sure that your script is readable and executable by ``others''; the
66	<span class="Unix">Unix</span> file mode should be <code>0755</code> octal (use "<tt class="samp">chmod 0755
67	<var>filename</var></tt>"). Make sure that the first line of the script contains
68	<code>#!</code> starting in column 1 followed by the pathname of the Python
69	interpreter, for instance:
70
71	<P>
72	<div class="verbatim"><pre>
73	#!/usr/local/bin/python
74	</pre></div>
75
76	<P>
77	Make sure the Python interpreter exists and is executable by ``others''.
78
79	<P>
80	Make sure that any files your script needs to read or write are
81	readable or writable, respectively, by ``others'' -- their mode
82	should be <code>0644</code> for readable and <code>0666</code> for writable. This
83	is because, for security reasons, the HTTP server executes your script
84	as user ``nobody'', without any special privileges. It can only read
85	(write, execute) files that everybody can read (write, execute). The
86	current directory at execution time is also different (it is usually
87	the server's cgi-bin directory) and the set of environment variables
88	is also different from what you get when you log in. In particular, don't
89	count on the shell's search path for executables (<a class="envvar" id='l2h-3173' xml:id='l2h-3173'>PATH</a>) or
90	the Python module search path (<a class="envvar" id='l2h-3174' xml:id='l2h-3174'>PYTHONPATH</a>) to be set to
91	anything interesting.
92
93	<P>
94	If you need to load modules from a directory which is not on Python's
95	default module search path, you can change the path in your script,
96	before importing other modules. For example:
97
98	<P>
99	<div class="verbatim"><pre>
100	import sys
101	sys.path.insert(0, "/usr/home/joe/lib/python")
102	sys.path.insert(0, "/usr/local/lib/python")
103	</pre></div>
104
105	<P>
106	(This way, the directory inserted last will be searched first!)
107
108	<P>
109	Instructions for non-<span class="Unix">Unix</span> systems will vary; check your HTTP server's
110	documentation (it will usually have a section on CGI scripts).
111
112	<P>
113
114	<DIV CLASS="navigation">
115	<div class='online-navigation'>
116	<p></p><hr />
117	<table align="center" width="100%" cellpadding="0" cellspacing="2">
118	<tr>
119	<td class='online-navigation'><a rel="prev" title="11.2.6 Caring about security"
120	href="cgi-security.html"><img src='../icons/previous.png'
121	border='0' height='32' alt='Previous Page' width='32' /></A></td>
122	<td class='online-navigation'><a rel="parent" title="11.2 cgi "
123	href="module-cgi.html"><img src='../icons/up.png'
124	border='0' height='32' alt='Up One Level' width='32' /></A></td>
125	<td class='online-navigation'><a rel="next" title="11.2.8 Testing your CGI"
126	href="node477.html"><img src='../icons/next.png'
127	border='0' height='32' alt='Next Page' width='32' /></A></td>
128	<td align="center" width="100%">Python Library Reference</td>
129	<td class='online-navigation'><a rel="contents" title="Table of Contents"
130	href="contents.html"><img src='../icons/contents.png'
131	border='0' height='32' alt='Contents' width='32' /></A></td>
132	<td class='online-navigation'><a href="modindex.html" title="Module Index"><img src='../icons/modules.png'
133	border='0' height='32' alt='Module Index' width='32' /></a></td>
134	<td class='online-navigation'><a rel="index" title="Index"
135	href="genindex.html"><img src='../icons/index.png'
136	border='0' height='32' alt='Index' width='32' /></A></td>
137	</tr></table>
138	<div class='online-navigation'>
139	<b class="navlabel">Previous:</b>
140	<a class="sectref" rel="prev" href="cgi-security.html">11.2.6 Caring about security</A>
141	<b class="navlabel">Up:</b>
142	<a class="sectref" rel="parent" href="module-cgi.html">11.2 cgi </A>
143	<b class="navlabel">Next:</b>
144	<a class="sectref" rel="next" href="node477.html">11.2.8 Testing your CGI</A>
145	</div>
146	</div>
147	<hr />
148	<span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span>
149	</DIV>
150	<!--End of Navigation Panel-->
151	<ADDRESS>
152	See <i><a href="about.html">About this document...</a></i> for information on suggesting changes.
153	</ADDRESS>
154	</BODY>
155	</HTML>