Function is_pty_child

crates/vm/src/stdlib/builtins.rs:743–747

()

    /// In this case, rustyline may hang because it uses raw mode.
    #[cfg(unix)]
    fn is_pty_child() -> bool {
        use nix::unistd::{getpid, getsid};
        // If this process is a session leader, we're likely in a PTY child
        getsid(None) == Ok(getpid())
    }

    #[cfg(not(unix))]
    fn is_pty_child() -> bool {