struct ltchars
{
  char t_suspc;   /* Raise SIGTSTP now */
  char t_dsuspc;  /* Raise SIGTSTP when read */
  char t_rprntc;  /* Redraws the input line */
  char t_flushc;  /* Flushes output */
  char t_werasc;  /* Erases a word */
  char t_lnextc;  /* Quotes a character */
};