4BSD/usr/man/cat8/getty.8

GETTY(8)            UNIX Programmer's Manual             GETTY(8)



NAME
     getty  - set terminal mode

SYNOPSIS
     /etc/getty [ char ]

DESCRIPTION
     _G_e_t_t_y is invoked by _i_n_i_t(8) immediately after a terminal is
     opened, following the making of a connection.  While reading
     the name _g_e_t_t_y attempts to adapt the system to the speed and
     type of terminal being used.

     _I_n_i_t calls _g_e_t_t_y with an argument specified by the _t_t_y_s file
     entry for the terminal line.  Arguments other than `0' can
     be used to make _g_e_t_t_y treat the line specially.  Normally,
     it sets the speed of the interface to 300 baud, specifies
     that raw mode is to be used (break on every character), that
     echo is to be suppressed, and either parity allowed.  It
     types a banner identifying the system (from
     /usr/include/ident.h and the `login:' message.  Then the
     user's name is read, a character at a time.  If a null char-
     acter is received, it is assumed to be the result of the
     user pushing the `break' (`interrupt') key.  The speed is
     then changed to 1200 baud and the `login:' is typed again; a
     second `break' changes the speed to 150 baud and the
     `login:' is typed again.  Successive `break' characters
     cycle through the speeds 300, 1200, and 150 baud.

     The user's name is terminated by a new-line or carriage-
     return character.  The latter results in the system being
     set to treat carriage returns appropriately (see _s_t_t_y(2)).

     The user's name is scanned to see if it contains any lower-
     case alphabetic characters; if not, and if the name is
     nonempty, the system is told to map any future upper-case
     characters into the corresponding lower-case characters.

     Finally, login is called with the user's name as argument.

SEE ALSO
     init(8), login(1), stty(2), ttys(5)

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Printed 11/10/80                                                1