Index for Section 4

Alphabetical listing for T

ttys(4)
NAME
  ttys - Terminal control database file	 (Enhanced Security)

DESCRIPTION
				     Notes
       The secure terminal database file, /etc/securettys, is used to control
       root logins on both C2 and non-C2 systems and is documented in the
       securettys(4) reference page.

       By default, ttys information is now in database format as converted by
       convauth.  The databases are not converted in an update installation.

  The system supports a single terminal control database that contains
  entries for each terminal that can be used for logging in. Authentication
  programs use information in the terminal control database to determine if
  log in from the terminal is permitted. Additional fields are maintained for
  informational purposes.

  The format of the terminal control database file is identical to other
  system authentication database files. For more information on the file
  format, see the authcap(4) reference page.  The file consists of keyword
  field identifiers and values for those fields. The following keyword
  identifiers are supported:

  t_devname This field defines the terminal device name for the entry. The
	    system expects that terminal devices are in the /dev directory
	    and therefore this prefix should not be specified. If the
	    terminal entry describes the /dev/tty1 device, the t_devname
	    field should contain tty1.

  t_uid	    This field contains the user ID of the last user who successfully
	    logged in using the terminal device.

  t_logtime This field is a time_t value that records the last successful
	    login time to the terminal device.

  t_unsucuid
	    This field contains the user ID of the last user who
	    unsuccessfully attempted to log in using the terminal device.

  t_unsuctime
	    This field is a time_t value that records the last unsuccessful
	    login time to the terminal device.

  t_prevuid This field contains the user ID of the user who successfully
	    logged in before the user identified in the t_uid field.  This
	    represents the UID of the previous login session.

  t_prevtime
	    This field is a time_t value that contains the system time of
	    last logout associated with this terminal device. This value
	    marks the end of the previous login session associated with the
	    user identified by t_prevuid.

  t_failures
	    This field records the number of consecutive unsuccessful login
	    attempts to the terminal device.

  t_maxtries
	    This field specifies the maximum number of consecutive
	    unsuccessful login attempts permitted using the terminal before
	    the terminal is locked. Once the terminal is locked, it must be
	    unlocked by an authorized administrator.

  t_logdelay
	    This field is a time_t value that identifies the login delay
	    enforced by authentication programs between unsuccessful login
	    attempts. This field is designed to slow the rate at which
	    penetration attempts on a terminal device can occur.

  t_lock    This field indicates whether the terminal device has been
	    administratively locked. This field is manipulated by authorized
	    administrators only.

  t_unlock  This field specifies the time interval in seconds after
	    t_unsuctime to wait before ignoring t_failures. Zero means never
	    ignore t_failures.

  t_login_timeout
	    This field specifies the login time-out value in seconds. If a
	    login attempt is initiated by entering a user name at the login
	    prompt but successful authentication is not completed within the
	    time-out interval specified, the login attempt is aborted.

  t_xdisplay
	    This field indicates that the entry is an X window display
	    managed by xdm, rather than a terminal device.

EXAMPLES
  The following example shows a typical terminal control database entry:

       console:t_devname=console:
	       :t_uid=reese:t_logtime#675430072:
	       :t_unsucuid=reese:t_unsuctime#673610809:
	       :t_prevuid=root:t_prevtime#671376915:
	       :chkent:

  This entry is for the system console device, /dev/console. The most recent
  successful login session was for the user reese. The most recent
  unsuccessful login attempt was also by user reese. Before the most recent
  successful login session, the root account was used to log in to the
  console.  The entry records the system time for the current successful
  login, the end of the previous successful login session, and the time of
  the most recent unsuccessful login attempt.

FILES
  /etc/auth/system/ttys
	    Specifies the pathname of the file.

RELATED INFORMATION
  Commands: login(1)

  Functions:  getprtcent(3)

  Files: authcap(4), default(4), securettys(4)