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import Posix
-- This test is an example of where something more sophisticated than runstdtest
-- is required, as its interactive.
main = do
installHandler keyboardSignal (Catch doCtrlC) Nothing
ta <- getTerminalAttributes stdInput
case (controlChar ta Interrupt) of
Nothing -> fixMe ta
Just x -> continue x
fixMe ta = do
putStr "Oops...no interrupt character?\nI can fix that...\n"
setTerminalAttributes stdInput (withCC ta (Interrupt, '\ETX')) Immediately
ta <- getTerminalAttributes stdInput
case (controlChar ta Interrupt) of
Nothing -> putStr "...Then again, maybe I can't\n"
Just x -> continue x
continue x =
putStr "Press '"
putStr (ccStr x)
putStr "'.\n"
awaitSignal Nothing
putStr "How did I get here?\n"
doCtrlC =
putStr "Caught an interrupt.\n"
ccStr '\DEL' = "^?"
ccStr x
| x >= ' ' = [x]
| otherwise = ['^', (toEnum (fromEnum x + fromEnum '@'))]
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