.\" Copyright (c) 1983 Regents of the University of California.
.\" All rights reserved. The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\" @(#)gettytab.5 6.2 (Berkeley) %G%
gettytab \- terminal configuration data base
is a simplified version of the
used to describe terminal lines.
The initial terminal login process
file each time it starts, allowing simpler
reconfiguration of terminal characteristics.
Each entry in the data base
is used to describe one class of terminals.
There is a default terminal class,
that is used to set global defaults for all other classes.
entry is read, then the entry for the class required
is used to override particular settings.)
for a description of the file layout.
column below lists defaults obtained if there is
no entry in the table obtained, nor one in the special
.ta \w'k0-k9 'u +\w'Type 'u +\w'``/bin/login" 'u
\fBName Type Default Description\fR
ap bool false terminal uses any parity
bk str 0377 alternate end of line character (input break)
cb bool false use crt backspace mode
cd num 0 carriage-return delay
ce bool false use crt erase algorithm
ck bool false use crt kill algorithm
cl str NULL screen clear sequence
co bool false console - add \\n after login prompt
ds str ^Y delayed suspend character
dx bool false set DECCTLQ
ec bool false leave echo \s-2OFF\s0
ep bool false terminal uses even parity
er str ^? erase character
et str ^D end of text (\s-2EOF\s0) character
ev str NULL initial enviroment
f0 num unused tty mode flags to write messages
f1 num unused tty mode flags to read login name
f2 num unused tty mode flags to leave terminal as
fd num 0 form-feed (vertical motion) delay
fl str ^O output flush character
hc bool false do \s-2NOT\s0 hangup line on last close
he str NULL hostname editing string
ht bool false terminal has real tabs
ig bool false ignore garbage characters in login name
im str NULL initial (banner) message
in str ^C interrupt character
is num unused input speed
lc bool false terminal has lower case
lm str login: login prompt
ln str ^V ``literal next'' character
lo str /bin/login program to exec when name obtained
nd num 0 newline (line-feed) delay
nl bool false terminal has (or might have) a newline character
nx str default next table (for auto speed selection)
op bool false terminal uses odd parity
os num unused output speed
pe bool false use printer (hard copy) erase algorithm
pf num 0 delay between first prompt and following flush (seconds)
ps bool false line connected to a MICOM port selector
qu str ^\\ quit character
rp str ^R line retype character
rw bool false do \s-2NOT\s0 use raw for input, use cbreak
sp num unused line speed (input and output)
su str ^Z suspend character
tc str none table continuation
to num 0 timeout (seconds)
tt str NULL terminal type (for enviroment)
ub bool false do unbuffered output (of prompts etc)
uc bool false terminal is known upper case only
we str ^W word erase character
xc bool false do \s-2NOT\s0 echo control chars as ^X
xf str ^S XOFF (stop output) character
xn str ^Q XON (start output) character
If no line speed is specified, speed will not be altered
from that which prevails when getty is entered.
Specifying an input or output speed will override
line speed for stated direction only.
Terminal modes to be used for the output of the message,
for input of the login name,
and to leave the terminal set as upon completion,
are derived from the boolean flags specified.
If the derivation should prove inadequate,
any (or all) of these three may be overriden
numeric specifications, which can be used to specify
(usually in octal, with a leading '0')
the exact values of the flags.
Local (new tty) flags are set in the top 16 bits
(presumed to indicate a line break)
it will restart using the table indicated by the
entry. If there is none, it will re-use its original table.
Delays are specified in milliseconds, the nearest possible
delay available in the tty driver will be used.
Should greater certainty be desired, delays
with values 0, 1, 2, and 3 are interpreted as
choosing that particular delay algorithm from the driver.
screen clear string may be preceded by a (decimal) number
of milliseconds of delay required (a la termcap).
This delay is simulated by repeated use of the pad character
The initial message, and login message,
may include the character sequence \fB%h\fP or \fB%t\fP to obtain
the hostname or tty name respectively.
(\fB%%\fP obtains a single '%' character.)
The hostname is normally obtained from the system,
In either case it may be edited with
string is a sequence of characters, each character that
is neither '@' nor '#' is copied into the final hostname.
string, causes one character from the real hostname to
be copied to the final hostname.
string, causes the next character of the real hostname
Surplus '@' and '#' characters are ignored.
When getty execs the login process, given
string (usually "/bin/login"), it will have set
the enviroment to include the terminal type, as indicated
string, can be used to enter additional data into
It is a list of comma separated strings, each of which
will presumably be of the form
If a non-zero timeout is specified, with
then getty will exit within the indicated
number of seconds, either having
received a login name and passed control
or having received an alarm signal, and exited.
This may be useful to hangup dial in lines.
to allow any parity on input, but generate odd parity output.
Note: this only applies while getty is being run,
terminal driver limitations prevent a more complete
does not check parity of input characters in
Some ignorant peasants insist on changing the default special
characters, so it is wise to always specify (at least) the
erase, kill, and interrupt characters in the
cases, '#' or '^H' typed in a login name will be treated as
an erase character, and '@' will be treated as a kill character.
The delay stuff is a real crock.
Apart form its general lack of flexibility, some
of the delay algorithms are not implemented.
The terminal driver should support sane delay settings.
format is horrid, something more rational should