TTY_PERM  (default: 0600, type: int)

    Mode for TTY devices


USE_TTY_GROUP (default: undefinied, type: #ifdef)

    Use the group tty for group ownership of TTY devices


FAILURE_SLEEP  (default: 5, type: float)

    Number of seconds to sleep on login failure


ERROR_SLEEP  (default: 2, type: float)

    Number of seconds to sleep on error,
    so the user has time to read the error message


TIMEOUT_SECONDS  (default: 60, type: int)

    Number of seconds before timeout when waiting for a passphrase


OWN_VCSA (default: undefinied, type: #ifdef)

    Take ownership of and change mode of VCSA device 


OWN_VCS (default: undefinied, type: #ifdef)

    Take ownership of and change mode of VCS device 


AUTH (default: pam, type: name)

    Authentication module. One of:

        pam	   -- Pluggable Authentication Module (PAM)
	none	   -- Always auto-authenticate
	crypt	   -- Authenticate with crypt and /etc/shadow or /etc/passwd


NO_SHADOW (default: undefined, type: #ifdef, required: AUTH=crypt)

    Do not use /etc/shadow (shadow.h) unless HAVE_SHADOW is definied