re-imported job/signal code from old implementation

src/fern.rs

@@ -7,12 +7,43 @@ pub mod expand;
 pub mod state;
 pub mod builtin;
 pub mod jobs;
+pub mod signal;
 #[cfg(test)]
 pub mod tests;
 
 use parse::{execute::Dispatcher, lex::{LexFlags, LexStream}, ParseStream};
+use termios::{LocalFlags, Termios};
 use crate::prelude::*;
 
+pub static mut SAVED_TERMIOS: Option<Option<Termios>> = None;
+
+pub fn save_termios() {
+	unsafe {
+		SAVED_TERMIOS = Some(if isatty(std::io::stdin().as_raw_fd()).unwrap() {
+			let mut termios = termios::tcgetattr(std::io::stdin()).unwrap();
+			termios.local_flags &= !LocalFlags::ECHOCTL;
+			termios::tcsetattr(std::io::stdin(), nix::sys::termios::SetArg::TCSANOW, &termios).unwrap();
+			Some(termios)
+		} else {
+			None
+		});
+	}
+}
+pub fn get_saved_termios() -> Option<Termios> {
+	unsafe {
+		// This is only used when the shell exits so it's fine
+		// SAVED_TERMIOS is only mutated once at the start as well
+		SAVED_TERMIOS.clone().flatten()
+	}
+}
+fn set_termios() {
+	if isatty(std::io::stdin().as_raw_fd()).unwrap() {
+		let mut termios = termios::tcgetattr(std::io::stdin()).unwrap();
+		termios.local_flags &= !LocalFlags::ECHOCTL;
+		termios::tcsetattr(std::io::stdin(), nix::sys::termios::SetArg::TCSANOW, &termios).unwrap();
+	}
+}
+
 fn main() {
 	'main: loop {
 		let input = prompt::read_line().unwrap();