# Apache module mod_env

This module provides for modifying the environment which is passed to CGI scripts and SSI pages.

Status: Base
Source File: mod_env.c
Module Identifier: env_module
Compatibility: Available in Apache 1.1 and later.

## Summary

This module allows for control of the environment that will be provided to CGI scripts and SSI pages. Environment variables may be passed from the shell which invoked the httpd process. Alternatively, environment variables may be set or unset within the configuration process.

For additional information, we provide a document on Environment Variables in Apache.

## Directives

- PassEnv
- SetEnv
- UnsetEnv

## PassEnv directive

Syntax: PassEnv variable [variable] ...
Context: server config, virtual host
Status: Base
Module: mod_env
Compatibility: PassEnv is only available in Apache 1.1 and later.

Specifies one or more environment variables to pass to CGI scripts and SSI pages from the environment of the shell which invoked the httpd process. Example:

        PassEnv LD_LIBRARY_PATH

## SetEnv directive

Syntax: SetEnv variable value
Context: server config, virtual host
Status: Base
Module: mod_env
Compatibility: SetEnv is only available in Apache 1.1 and later.

Sets an environment variable, which is then passed on to CGI scripts and SSI pages. Example:

        SetEnv SPECIAL_PATH /foo/bin

## UnsetEnv directive

Syntax: UnsetEnv variable [variable] ...
Context: server config, virtual host
Status: Base
Module: mod_env
Compatibility: UnsetEnv is only available in Apache 1.1 and later.

Removes one or more environment variables from those passed on to CGI scripts and SSI pages. Example:

        UnsetEnv LD_LIBRARY_PATH