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-<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>30.9. Extensions-2.9. Operating System
-  Environment.</title><link rel="stylesheet" href="impnotes.css" type="text/css" /><link rev="made" href="mailto:clisp-list@sf.net" /><meta name="generator" content="DocBook XSL Stylesheets V1.65.1" /><link rel="home" href="index.html" title="Implementation Notes for GNU CLISP." /><link rel="up" href="platform.html" title="Chapter 30. Extensions-2: Platform specific Extensions" /><link rel="previous" href="shell.html" title="30.8. Extensions-2.8. Shell, Pipes and Printing" /><link rel="next" href="separate-io.html" title="30.10. Extensions-2.10. Other" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">30.9. Extensions-2.9. Operating System
-  Environment.</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="shell.html">Prev</a> </td><th width="60%" align="center">Chapter 30. Extensions-2: Platform specific Extensions</th><td width="20%" align="right"> <a accesskey="n" href="separate-io.html">Next</a></td></tr></table><hr /></div><div class="section" lang="en" xml:lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="getenv"></a>30.9. Extensions-2.9. Operating System
-  Environment.</h2></div></div><div></div></div><p>Most modern operating systems support <a href="http://www.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap08.html" target="_top">environment variable</a>s that associate
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:cf="http://docbook.sourceforge.net/xmlns/chunkfast/1.0"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>31.9. Operating System Environment.</title><link rel="stylesheet" href="impnotes.css" type="text/css" /><link rev="made" href="mailto:clisp-list@sf.net" /><meta name="generator" content="DocBook XSL Stylesheets V2005-07-12_04:47_snapshot" /><link rel="start" href="index.html" title="Implementation Notes for GNU CLISP." /><link rel="up" href="ext-platform.html" title="Chapter 31. Platform Specific Extensions" /><link rel="prev" href="shell.html" title="31.8. Shell, Pipes and Printing" /><link rel="next" href="ext-modules.html" title="Chapter 32. Extensions Implemented as Modules" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">31.9. Operating System Environment.</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="shell.html">Prev</a> </td><th width="60%" align="center">Chapter 31. Platform Specific Extensions</th><td width="20%" align="right"> <a accesskey="n" href="ext-modules.html">Next</a></td></tr></table><hr /></div><div class="section" lang="en" xml:lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="getenv"></a>31.9. Operating System Environment.</h2></div></div></div><p>Most modern operating systems support <a href="http://www.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap08.html" target="_top">environment variable</a>s that associate
  strings (“<span class="quote">variables</span>”) with other strings
  (“<span class="quote">values</span>”).  These variables are somewhat similar to the
- <a href="http://www.lisp.org/HyperSpec/Body/dec_special.html" target="_top"><tt class="literal">SPECIAL</tt></a> variables in <a href="http://www.lisp.org" target="_top"><span><b class="command">Common Lisp</b></span></a>: their values are inherited by the
+ <a href="http://www.lisp.org/HyperSpec/Body/dec_special.html" target="_top"><code class="literal">SPECIAL</code></a> variables in <a href="http://www.lisp.org" target="_top"><span><strong class="command">Common Lisp</strong></span></a>: their values are inherited by the
  processes from their parent process.</p><p>You can access your OS <a href="http://www.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap08.html" target="_top">environment variable</a>s using the function
-<tt class="sexp">(<a href="getenv.html" title="30.9. Extensions-2.9. Operating System&#10;  Environment."><tt class="function">EXT:GETENV</tt></a> <a href="http://www.lisp.org/HyperSpec/Body/sec_3-4-1.html" target="_top"><tt class="literal">&amp;OPTIONAL</tt></a> <i class="replaceable"><tt>string</tt></i>)</tt>,
-where <i class="replaceable"><tt>string</tt></i> is the name of the <a href="http://www.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap08.html" target="_top">environment variable</a>.
-When <i class="replaceable"><tt>string</tt></i> is omitted or <a href="http://www.lisp.org/HyperSpec/Body/convar_nil.html" target="_top"><tt class="constant">NIL</tt></a>, all the <a href="http://www.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap08.html" target="_top">environment variable</a>s and their values
-are returned in an <a href="http://www.lisp.org/HyperSpec/Body/glo_a.html#association_list" target="_top">alist</a>.</p><p>You can change the value of existing <a href="http://www.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap08.html" target="_top">environment variable</a>s or create new
- ones using <tt class="sexp">(<a href="http://www.lisp.org/HyperSpec/Body/mac_setfcm_psetf.html" target="_top"><tt class="function">SETF</tt></a> (<a href="getenv.html" title="30.9. Extensions-2.9. Operating System&#10;  Environment."><tt class="function">EXT:GETENV</tt></a>
- <i class="replaceable"><tt>string</tt></i>) <i class="replaceable"><tt>new-value</tt></i>)</tt>.</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="shell.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="platform.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="separate-io.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">30.8. Extensions-2.8. Shell, Pipes and Printing </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> 30.10. Extensions-2.10. Other</td></tr></table></div><div class="custom-footer"><hr width="100%" /><table width="100%"><tr><td align="left"><a href="http://clisp.cons.org"><img src="clisp.png" width="48" height="48" alt="[CLISP home]" /></a></td><td align="center"><a href="http://www.gnu.org"><img src="http://www.gnu.org/graphics/gnubanner.jpg" width="468" height="60" alt="[Come and see what GNU creates for YOU]" /></a></td><td align="right"><a href="http://sourceforge.net"><img src="http://sourceforge.net/sflogo.php?group_id=1355&amp;amp;type=2" width="125" height="37" alt="[SourceForge]" /></a></td></tr></table></div></body></html>
+<code class="code">(<a href="getenv.html" title="31.9. Operating System Environment."><code class="function">EXT:GETENV</code></a> <a href="http://www.lisp.org/HyperSpec/Body/sec_3-4-1.html" target="_top"><code class="literal">&amp;OPTIONAL</code></a> <em class="replaceable"><code>string</code></em>)</code>,
+where <em class="replaceable"><code>string</code></em> is the name of the <a href="http://www.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap08.html" target="_top">environment variable</a>.
+When <em class="replaceable"><code>string</code></em> is omitted or <a href="http://www.lisp.org/HyperSpec/Body/convar_nil.html" target="_top"><code class="constant">NIL</code></a>, all the <a href="http://www.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap08.html" target="_top">environment variable</a>s and their values
+are returned in an <a href="http://www.lisp.org/HyperSpec/Body/glo_a.html#association_list" target="_top">alist</a>.</p><p>You can change the value of existing <a href="http://www.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap08.html" target="_top">environment variable</a>s or create new ones
+ using <code class="code">(<a href="http://www.lisp.org/HyperSpec/Body/mac_setfcm_psetf.html" target="_top"><code class="function">SETF</code></a> (<a href="getenv.html" title="31.9. Operating System Environment."><code class="function">EXT:GETENV</code></a> <em class="replaceable"><code>string</code></em>) <em class="replaceable"><code>new-value</code></em>)</code>.
+</p></div><div class="bookinfo"><hr width="100%" /><table width="100%" summary="impnotes meta info"><th><td align="left">These notes document <a href="http://clisp.cons.org" target="_top"><span><strong class="command">CLISP</strong></span></a> version 2.34.</td><td align="right">Last modified: 2005-07-20</td></th></table></div><div class="custom-footer"><hr width="100%" /><table width="100%"><tr><td align="left"><a href="http://clisp.cons.org"><img src="clisp.png" width="48" height="48" alt="[CLISP home]" /></a></td><td align="center"><a href="http://www.gnu.org"><img src="http://www.gnu.org/graphics/gnubanner.jpg" width="468" height="60" alt="[Come and see what GNU creates for YOU]" /></a></td><td align="right"><a href="http://sourceforge.net"><img width="125" height="37" alt="[SourceForge]" src="http://sflogo.sourceforge.net/sflogo.php?group_id=1355&amp;type=2&amp;page=getenv" /></a></td></tr></table></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="shell.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ext-platform.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ext-modules.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">31.8. Shell, Pipes and Printing </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 32. Extensions Implemented as Modules</td></tr></table></div></body></html>