info guile

This is a portable wrapper around Guile’s built-in support for interacting with the current environment, See section Runtime Environment.

Scheme Procedure: get-environment-variable name: Returns a string containing the value of the environment variable given by the string name, or #f if the named environment variable is not found. This is equivalent to (getenv name).

Scheme Procedure: get-environment-variables: Returns the names and values of all the environment variables as an association list in which both the keys and the values are strings.