do_item
retval = do_item(pamh, tach, PAM_USER, tac_set_user, "tac_set_user");
retval = do_item(pamh, tach, PAM_TTY, tac_set_port, "tac_set_port");
retval = do_item(pamh, tach, PAM_RHOST, tac_set_rem_addr,
static int do_item(pam_handle_t *, struct tac_handle *, int,