src/raw_guard.rs


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use std::os::unix::io::AsRawFd as _;

pub struct RawGuard {
    termios: nix::sys::termios::Termios,
    cleaned_up: bool,
}

impl RawGuard {
    #[allow(clippy::new_without_default)]
    pub fn new() -> Self {
        let stdin = std::io::stdin().as_raw_fd();
        let termios = nix::sys::termios::tcgetattr(stdin).unwrap();
        let mut termios_raw = termios.clone();
        nix::sys::termios::cfmakeraw(&mut termios_raw);
        nix::sys::termios::tcsetattr(
            stdin,
            nix::sys::termios::SetArg::TCSANOW,
            &termios_raw,
        )
        .unwrap();
        Self {
            termios,
            cleaned_up: false,
        }
    }

    pub fn cleanup(&mut self) {
        if self.cleaned_up {
            return;
        }
        self.cleaned_up = true;
        let stdin = std::io::stdin().as_raw_fd();
        let _ = nix::sys::termios::tcsetattr(
            stdin,
            nix::sys::termios::SetArg::TCSANOW,
            &self.termios,
        );
    }
}

impl Drop for RawGuard {
    fn drop(&mut self) {
        self.cleanup();
    }
}