sys.env

sys.env

The interface to the operating system environment.

sys.env.uname
   -> ("Linux" "turtlekitty" "4.2.6_1" "#1 SMP PREEMPT Tue Nov 10 07:19:29 UTC 2015" "x86_64")

sys.env.hostname
   -> "turtlekitty"

(sys.env.get "SHELL") ; get accepts a text
   -> "/bin/bash"

(sys.env.get 'SHELL)  ; or a symbol
   -> "/bin/bash"

(sys.env.set! 'FOO "23") ; values must be texts
   -> "23"

(sys.env.get 'FOO)
   -> "23"

(sys.env.del! 'FOO)
   -> null

(sys.env.get 'FOO)
   -> null