securettys - Secure terminal database file
The terminal database file used on a trusted system is
/etc/auth/system/ttys and is documented in the ttys(4) reference page.
The /etc/securettys file specifies the tty lines that are considered secure
and permit logins as root.
Each line in the file contains the pathname of the special file for a ter-
minal. A number sign (#) character can be used for comments. The follow-
ing example is typical and allows root to log in from the console, from the
X-display, and from tty00:
# Terminal lines for root logins
If this file does not exist, root can log in only from the console.
To allow root to log in from any pseudoterminal, add the keyword ptys to
this file. (This keyword does not require the /dev prefix.)
Specifies the pathname of the file.