[unix-history] / usr / man / man8 / getty.8

.TH GETTY 8 
.SH NAME
getty  \- set typewriter mode
.SH SYNOPSIS
.B /etc/getty
[ char ]
.SH DESCRIPTION
.I Getty
is invoked
by
.IR  init (8)
immediately after a typewriter is opened
following a dial-up.
It reads the user's login name and calls
.IR login (1)
with the name as argument.
While reading the name
.I getty
attempts to adapt the system to the speed and type of terminal
being used.
.PP
.I Init
calls
.I getty
with a single character argument taken from
the
.IR ttys (5)
file entry for the terminal line.
This argument determines a sequence of line speeds through which
.I getty
cycles, and also the `login:' greeting message,
which can contain character sequences to put various kinds of
terminals in useful states.
.PP
The user's name is terminated by a new-line or
carriage-return character.
In the second case CRMOD mode is set
(see
.IR  ioctl (2)).
.PP
The 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.
.PP
If the terminal's `break' key is depressed,
.I getty
cycles to the next speed appropriate to the type of line
and prints the greeting message again.
.PP
Finally, login is called with the user's name as argument.
.PP
The following arguments from the
.I ttys
file are understood.
.TP
0
Cycles through 300-1200-150-110 baud.
Useful as a default for dialup lines accessed by a variety
of terminals.
.TP
\-
Intended for an on-line Teletype model 33, for example
an operator's console.
.TP
1
Optimized for a 150-baud Teletype model 37.
.TP
2
Intended for an on-line 9600-baud terminal, for example
the Textronix 4104.
.TP
3
Starts at 1200 baud, cycles to 300 and back.
Useful with 212 datasets where most terminals
run at 1200 speed.
.TP
5
Same as `3' but starts at 300.
.TP
4
Useful for on-line console DECwriter (LA36).
.SH "SEE ALSO"
init(8), login(1), ioctl(2), ttys(5)
Commit	Line	Data
aa26a18b KT	1	.TH GETTY 8
	2	.SH NAME
	3	getty \- set typewriter mode
	4	.SH SYNOPSIS
	5	.B /etc/getty
	6	[ char ]
	7	.SH DESCRIPTION
	8	.I Getty
	9	is invoked
	10	by
	11	.IR init (8)
	12	immediately after a typewriter is opened
	13	following a dial-up.
	14	It reads the user's login name and calls
	15	.IR login (1)
	16	with the name as argument.
	17	While reading the name
	18	.I getty
	19	attempts to adapt the system to the speed and type of terminal
	20	being used.
	21	.PP
	22	.I Init
	23	calls
	24	.I getty
	25	with a single character argument taken from
	26	the
	27	.IR ttys (5)
	28	file entry for the terminal line.
	29	This argument determines a sequence of line speeds through which
	30	.I getty
	31	cycles, and also the `login:' greeting message,
	32	which can contain character sequences to put various kinds of
	33	terminals in useful states.
	34	.PP
	35	The user's name is terminated by a new-line or
	36	carriage-return character.
	37	In the second case CRMOD mode is set
	38	(see
	39	.IR ioctl (2)).
	40	.PP
	41	The name is scanned to see if
	42	it contains any lower-case alphabetic characters; if not,
	43	and if the name is nonempty, the
	44	system is told to map any future upper-case characters
	45	into the corresponding lower-case characters.
	46	.PP
	47	If the terminal's `break' key is depressed,
	48	.I getty
	49	cycles to the next speed appropriate to the type of line
	50	and prints the greeting message again.
	51	.PP
	52	Finally, login is called with the user's name as argument.
	53	.PP
	54	The following arguments from the
	55	.I ttys
	56	file are understood.
	57	.TP
	58	0
	59	Cycles through 300-1200-150-110 baud.
	60	Useful as a default for dialup lines accessed by a variety
	61	of terminals.
	62	.TP
	63	\-
	64	Intended for an on-line Teletype model 33, for example
65	an operator's console.
66	.TP
67	1
68	Optimized for a 150-baud Teletype model 37.
69	.TP
70	2
71	Intended for an on-line 9600-baud terminal, for example
72	the Textronix 4104.
73	.TP
74	3
75	Starts at 1200 baud, cycles to 300 and back.
76	Useful with 212 datasets where most terminals
77	run at 1200 speed.
78	.TP
79	5
80	Same as `3' but starts at 300.
81	.TP
82	4
83	Useful for on-line console DECwriter (LA36).
84	.SH "SEE ALSO"
85	init(8), login(1), ioctl(2), ttys(5)