ttys(4)

NAME

ttys − terminal control database file , for trusted systems

SYNOPSIS

/tcb/files/ttys

DESCRIPTION

The system supports a single terminal control database containing entries for each terminal that can log into the system. Authentication programs use information contained in the terminal control database to determine if login to 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 authcap(4). The file consists of keyword field identifiers and values for those fields. The keyword identifiers supported and their use include:

t_devname This field defines the terminal device name for the entry. The terminal device is expected to be contained in the /dev directory, 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 to successfully login using the terminal device.

t_logtime This time_t field records the last successful login time to the terminal device.

t_unsuctime This time_t field records the last unsuccessful login time to the terminal device.

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_lock This flag field indicates whether the terminal device has been administratively locked or not. This field is manipulated by authorized administrators only.

EXAMPLES

The following is an example of a terminal control database entry:

console:t_devname=console:\
:t_uid=reese:t_logtime#675430072:\
:t_unsuctime#673610809:\
:t_maxtries#777:\
:chkent:

This entry is for the system console device, /dev/console. The most recent successful login session was for the user reese. The entry records the system time for the current successful login and the time of the most recent unsuccessful login attempt.

AUTHOR

SecureWare Inc.

FILES

/tcb/files/ttys Terminal control database file

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