| PAM_SECURETTY(8) | System Manager's Manual | PAM_SECURETTY(8) | 
pam_securetty —
account” feature. It also provides null
  functions for authentication and session management.
pam_sm_acct_mgmt()), returns failure if the user is
  attempting to authenticate as superuser, and the process is attached to an
  insecure TTY. In all other cases, the module returns success.
A TTY is considered secure if it is listed in
    /etc/ttys and has the
    TTY_SECURE flag set.
The following options may be passed to the authentication module:
| July 8, 2001 | NetBSD 10.1 |