Function insert_io

pub fn insert_io<I, O, E>(
    root: &Path,
    pass_name: &str,
    insert_cfg: &PasswdInsertConfig,
    in_s: &mut I,
    out_s: &mut O,
    err_s: &mut E,
) -> Result<bool>
where
    I: Read + BufRead,
    O: Write,
    E: Write,