svn commit: r911499 - /httpd/httpd/trunk/docs/manual/env.xml

[po...@apache.org]

Author: poirier
Date: Thu Feb 18 17:34:58 2010
New Revision: 911499

URL: http://svn.apache.org/viewvc?rev=911499&view=rev
Log:
Make a start on explaining the two kinds of "environment variables"
that Apache deals with.

Modified:
    httpd/httpd/trunk/docs/manual/env.xml

Modified: httpd/httpd/trunk/docs/manual/env.xml
URL: http://svn.apache.org/viewvc/httpd/httpd/trunk/docs/manual/env.xml?rev=911499&r1=911498&r2=911499&view=diff
==============================================================================
--- httpd/httpd/trunk/docs/manual/env.xml (original)
+++ httpd/httpd/trunk/docs/manual/env.xml Thu Feb 18 17:34:58 2010
@@ -25,8 +25,17 @@
   <title>Environment Variables in Apache</title>
 
   <summary>
-    <p>The Apache HTTP Server provides a mechanism for storing
-    information in named variables that are called <em>environment
+    <p>There are two kinds of environment variables that affect
+    the Apache HTTP Server.</p>
+
+    <p>First, there are the environment variables controlled by
+    the underlying operating system.  These are set before the
+    server starts.  They can be used in expansions in configuration
+    files, and can optionally be passed to CGI scripts and SSI
+    using the PassEnv directive.</p>
+
+    <p>Second, the Apache HTTP Server provides a mechanism for storing
+    information in named variables that are also called <em>environment
     variables</em>. This information can be used to control various
     operations such as logging or access control. The variables are
     also used as a mechanism to communicate with external programs