getenv

[procedure] getenv string

ChezScheme, Chicken, STk, Scsh, Bigloo: returns the environment value or #f. See also setenv!, setenv or putenv.

This is called lookup-environment-variable or sys-getenv on some implementations.

[procedure] getenv [string]

STklos: the environment name is optional. If omitted, returns an alist of all environment names and variables.