sys.env

sys.env

The interface to the operating system environment.

sys.env.uname
; ("Linux" "turtlekitty" "4.17.6_1"
;  "#1 SMP PREEMPT Sat Jul 14 12:59:18 UTC 2018" "x86_64")

sys.env.hostname           ; "turtlekitty"
(sys.env.get "SHELL")      ; "/bin/bash"     ; get accepts a text
(sys.env.get 'SHELL)       ; "/bin/bash"     ; or a symbol for the key
(sys.env.set! 'FOO "23")   ; "23"            ; values must be a text
(sys.env.get 'FOO)         ; "23"
(sys.env.del! 'FOO)        ; null
(sys.env.get 'FOO)         ; null