Test Ctrl-C, job control and hangup with an interactive shell on a terminal

tests/e2e/forwarding.rs

@@ -1,8 +1,6 @@
 use std::os::unix::process::{CommandExt, ExitStatusExt};
 use std::path::Path;
 use std::process::{Child, Stdio};
-use std::thread;
-use std::time::{Duration, Instant};
 
 use tempfile::TempDir;
 
@@ -125,14 +123,6 @@ fn spawn_sandbox(args: &[&str], dir: &Path, script: &str) -> (Sandbox, Child) {
     (sandbox, child)
 }
 
-fn wait_for_file(path: &Path) {
-    let deadline = Instant::now() + Duration::from_secs(10);
-    while !path.exists() {
-        assert!(Instant::now() < deadline, "timed out waiting for {path:?}");
-        thread::sleep(Duration::from_millis(10));
-    }
-}
-
 fn send_signal(child: &Child, signal: i32) {
     unsafe { libc::kill(child.id() as i32, signal) };
 }