GETTY(8) GETTY(8)
NAME
getty - set terminal mode
SYNOPSIS
/etc/getty [ char ]
DESCRIPTION
Getty is invoked by init(8) immediately after a terminal is
opened, following the making of a connection. While reading
the user's name getty attempts to adapt the system to the
speed and type of terminal being used.
Init calls getty with an argument specified by the /etc/ttys
file entry for the terminal line. The argument char deter-
mines the line speed and other characteristics; see below.
Getty then types a banner identifying the system (from
/etc/whoami) and the `login:' message. Then the user's name
is read, a character at a time. If a null character 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 ioctl(2)).
Finally, login(8) is called with the user's name as argu-
ment.
Here are the possible values for char. If more than one
speed is given, the first speed is used initially; others
are selected by successive depressions of the BREAK key.
Other things, like delays and tab expansion, are set in var-
ious ways as well.
char speed
0 300-1200-150-110
2 9600
3 1200-300
4 300
5 300-1200
6 2400
7 4800
8 9600-300
9 300-9600
j exta (usually 19200)
GETTY(8) GETTY(8)
SEE ALSO
init(8), login(8), ioctl(2), ttys(5)