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import Posix
main =
getEnvVar "TERM" >>= \ term ->
putStr term >>
putChar '\n' >>
setEnvironment [("one","1"),("two","2")] >>
getEnvironment >>= \ env ->
print env >>
putChar '\n' >>
setEnvVar "foo" "bar" >>
getEnvironment >>= \ env ->
print env >>
putChar '\n' >>
setEnvVar "foo" "baz" >>
getEnvironment >>= \ env ->
print env >>
putChar '\n' >>
setEnvVar "fu" "bar" >>
getEnvironment >>= \ env ->
print env >>
putChar '\n' >>
removeEnvVar "foo" >>
getEnvironment >>= \ env ->
print env >>
putChar '\n' >>
setEnvironment [] >>
getEnvironment >>= \ env ->
print env >>
putChar '\n'
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