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<?xml version="1.0"?>
<!DOCTYPE modulesynopsis SYSTEM "../style/modulesynopsis.dtd">
<?xml-stylesheet type="text/xsl" href="../style/manual.en.xsl"?>
<!-- $LastChangedRevision$ -->
<!--
Copyright 2002-2006 The Apache Software Foundation or its licensors, as
applicable.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<modulesynopsis metafile="mod_cgid.xml.meta">
<name>mod_cgid</name>
<description>Execution of CGI scripts using an
external CGI daemon</description>
<status>Base</status>
<sourcefile>mod_cgid.c</sourcefile>
<identifier>cgid_module</identifier>
<compatibility>Unix threaded MPMs only</compatibility>
<summary>
<p>Except for the optimizations and the additional <directive
module="mod_cgid">ScriptSock</directive> directive noted below,
<module>mod_cgid</module> behaves similarly to <module>mod_cgi</module>.
<strong>See the <module>mod_cgi</module> summary for additional details
about Apache and CGI.</strong></p>
<p>On certain unix operating systems, forking a process from a
multi-threaded server is a very expensive operation because the
new process will replicate all the threads of the parent
process. In order to avoid incurring this expense on each CGI
invocation, <module>mod_cgid</module> creates an external daemon that is
responsible for forking child processes to run CGI scripts. The
main server communicates with this daemon using a unix domain
socket.</p>
<p>This module is used by default instead of
<module>mod_cgi</module> whenever a multi-threaded MPM
is selected during the compilation process. At the user level,
this module is identical in configuration and operation to
<module>mod_cgi</module>. The only exception is the
additional directive <code>ScriptSock</code> which gives the
name of the socket to use for communication with the cgi
daemon.</p>
</summary>
<seealso><module>mod_cgi</module></seealso>
<seealso><a href="../suexec.html">Running CGI programs under different
user IDs</a></seealso>
<directivesynopsis location="mod_cgi">
<name>ScriptLog</name>
</directivesynopsis>
<directivesynopsis location="mod_cgi">
<name>ScriptLogLength</name>
</directivesynopsis>
<directivesynopsis location="mod_cgi">
<name>ScriptLogBuffer</name>
</directivesynopsis>
<directivesynopsis>
<name>ScriptSock</name>
<description>The filename prefix of the socket to use for communication with
the cgi daemon</description>
<syntax>ScriptSock <var>file-path</var></syntax>
<default>ScriptSock logs/cgisock</default>
<contextlist><context>server config</context>
<context>virtual host</context></contextlist>
<usage>
<p>This directive sets the filename prefix of the socket to use for
communication with the CGI daemon, an extension correspondening to
the process ID of the server will be appended. The socket will be opened
using the permissions of the user who starts Apache (usually
root). To maintain the security of communications with CGI
scripts, it is important that no other user has permission to
write in the directory where the socket is located.</p>
<example><title>Example</title>
ScriptSock /var/run/cgid.sock
</example>
</usage>
</directivesynopsis>
</modulesynopsis>
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