mod_env

Overview

mod_env module provides control of the environment that will be provided to CGI scripts and SSI pages. Alternatively, environment variables may be set or unset within the configuration process.

Quick start

Here's how you can enable some useful Ape modules with the help of mod_env: 

# enables mod_linkfreeze
SetEnv mod_linkfreeze
# enables mod_hotlink
SetEnv mod_hotlink

Related articles and topics

Directives

Name Context Description
PassEnv S V D .h passes environment variables from the shell
SetEnv S V D .h sets environment variables
UnSetEnv S V D .h removes variables from the environment

PassEnv

Actually, PassEnv directive is left for Apache compatibility and practically does not perform any actions. This happens because IIS, unlike Apache, automatically adds the list of w3wp process environment variables to the list of server variables.

Syntax 

PassEnv env-variable [env-variable] ...

Example 

PassEnv LD_LIBRARY_PATH

SetEnv

SetEnv directive sets an environment variable that is then passed on to CGI scripts and SSI pages.

Syntax 

SetEnv env-variable value

Example 

SetEnv SPECIAL_PATH /foo/bin

UnsetEnv

UnsetEnv directive removes one or more environment variables from those passed to CGI scripts and SSI pages.

Syntax 

UnsetEnv env-variable [env-variable] ...

Example 

# disable gzip
UnsetEnv gzip