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<modulesynopsis>

<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 name 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 name of the socket to use for

communication with the CGI daemon. 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>