2.9BSD/usr/man/cat5/ttys.5

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TTYS(5)             UNIX Programmer's Manual              TTYS(5)

NAME
     ttys - terminal initialization data

DESCRIPTION
     The _t_t_y_s file is read by the _i_n_i_t program and specifies
     which terminal special files are to have a process created
     for them which will allow people to log in.  It contains one
     line per special file.

     The first character of a line controls when it will be used.
     A '0' or '1' indicates that the line is to be off or on,
     respectively.  A '2' or '3' means that the line will be used
     in "special session"; see _i_n_i_t(8).  If the character is a
     '3', it will also be used for normal multi-user operations.
     The second character is used as an argument to _g_e_t_t_y(8),
     which performs such tasks as baud-rate recognition, reading
     the login name, and calling _l_o_g_i_n(1).  For normal lines, the
     character is `0'; other characters can be used, for example,
     with hard-wired terminals where speed recognition is
     unnecessary or which have special characteristics.  (_g_e_t_t_y
     will have to be fixed in such cases.) The  next field of the
     line is the terminal's entry in the device directory, /dev.
     This field is terminated by a whitespace character. The rest
     of the line is optional information in the form of terminal
     type (as found in /etc/termcap), port type and number (e.g.
     `dh', `0'), and remarks (room number, nearby phone, dialup
     number, etc).

FILES
     /etc/ttys

SEE ALSO
     login(1), init(8), getty(8)

Printed 5/17/83                                                 1