(Info-goto-node "(elisp)System Environment")
val getenv : var:string ‑> string option(describe-function 'getenv)(Info-goto-node "(elisp)System Environment")
val setenv : var:string ‑> value:string option ‑> unit(describe-function 'setenv)(Info-goto-node "(elisp)System Environment")
val process_environment : string list Var.t(describe-variable 'process-environment)(Info-goto-node "(elisp)System Environment")
module Var_and_value : sig ... endval setenv_temporarily : Var_and_value.t list ‑> f:(unit ‑> 'a) ‑> 'a