System.IO.Echo

Perform a computation with the terminal's input echoing disabled. Before running the computation, the terminal's input EchoState is saved, and the saved EchoState is restored after the computation finishes.

withoutInputEcho action = bracketInputEcho (setInputEchoState echoOff >> action)

Save the terminal's current input EchoState, perform a computation, restore the saved EchoState, and then return the result of the computation.

bracketInputEcho action = bracket getInputEchoState setInputEchoState (const action)

Return the terminal's current input EchoState.

Set the terminal's input EchoState.

A representation of the terminal input's current echoing state. Example values include echoOff and echoOn.

Indicates that the terminal's input echoing is (or should be) off.

Indicates that the terminal's input echoing is (or should be) on.

Return whether the terminal's echoing is on (True) or off (False).

Note that while this works on MinTTY, it is not as efficient as getInputEchoState, as it involves a somewhat expensive substring computation.

Set the terminal's echoing on (True) or off (False).