GETTYTAB(5) BSD Programmer's Manual GETTYTAB(5)NAMEgettytab - terminal configuration data base
SYNOPSISgettytabDESCRIPTION
The gettytab file is a simplified version of the termcap(5) data base
used to describe terminal lines. The initial terminal login process get-
ty(8) accesses the gettytab 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, default, that is used to set global
defaults for all other classes. (That is, the default entry is read,
then the entry for the class required is used to override particular set-
tings.)
CAPABILITIES
Refer to termcap(5) for a description of the file layout. The default
column below lists defaults obtained if there is no entry in the table
obtained, nor one in the special default table.
Name Type Default Description
ap bool false set 7-bits and ignore input parity
bi bool false bidirectional line (dial-in, dial-out)
bk str 0377 alternate end of line character (input
break)
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
de num unused delay before first banner
ds str `^Y' delayed suspend character
dx bool false set DECCTLQ
ec bool false leave echo OFF
ep bool false terminal uses even parity, 7-bits
er str `^?' erase character
et str `^D' end of text (EOF) character
ev str NULL initial environment
fl str `^O' output flush character
hc bool false do NOT hangup line on last close
he str NULL hostname editing string
hf bool false enable bidirectional hardware flow
control
hn str hostname hostname
ht bool false terminal has real tabs
hw bool false hardwired (ignore hardware carrier-
detect)
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
kl str `^U' kill character
lm str login: login prompt
ln str `^V' ``literal next'' character
lo str /usr/bin/login program to exec when name obtained
m0 str NULL stty-style mode string used to write
messages
m1 str NULL stty-style mode string used to read
login name
m2 str NULL stty-style mode string used to leave
terminal as
ms str NULL stty-style mode string for default
modes
nl bool false terminal has (or might have) a newline
character
np bool false set 8-bit, no parity
nx str default next table (for auto speed selection)
op bool false terminal uses odd parity
os num unused output speed
pc str `\0' pad character (not currently used)
pe bool false use printer (hard copy) erase algorithm
pf num 0 delay between first prompt and follow-
ing flush (seconds)
pl str 0 ppp_direct name to use for PPP connec-
tions.
pp str 0 /usr/bin/ppp path to the ppp(8) pro-
gram.
ps bool false line connected to a MICOM port selector
qu str `^\' quit character
ra bool false do not reset modes to default before
starting
rp str `^R' line retype character
rw bool false do NOT 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 environment)
ub bool false do unbuffered output (of prompts etc)
we str `^W' word erase character
xc bool false do NOT 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 and the ms string. If the derivation
should prove inadequate, any (or all) of these three may be overridden
with one of the m0, m1, or m2 string specifications, which can be used to
specify the stty(1)-style strings.
Should getty receive a null character (presumed to indicate a line break)
it will restart using the table indicated by the nx entry. If there is
none, it will re-use its original table.
If the bi flag is set, getty will enable bidirectional use on the line.
The line must support modem control, thus this option is incompatible
with the hw flag. In this mode, getty waits for carrier detect, then
checks whether the line is locked for dial-out use. If it is locked, it
pauses until the line is unlocked. If the line is not locked, getty ac-
quires the lock to prevent dial-out use until the line is hung up.
The cl screen clear string may be preceded by a (decimal) number of mil-
liseconds of delay required (a la termcap).
The initial message, and login message, im and lm may include the charac-
ter sequence %h or %t to obtain the hostname or tty name respectively.
(%% obtains a single '%' character.) The hostname is normally obtained
from the system, but may be set by the hn table entry. In either case it
may be edited with he. The he string is a sequence of characters, each
character that is neither '@' nor '#' is copied into the final hostname.
A '@' in the he string, causes one character from the real hostname to be
copied to the final hostname. A '#' in the he string, causes the next
character of the real hostname to be skipped. Surplus '@' and '#' char-
acters are ignored.
When getty execs the login process, given in the lo string (usually
``/usr/bin/login''), it will have set the environment to include the ter-
minal type, as indicated by the tt string (if it exists). The ev string,
can be used to enter additional data into the environment. It is a list
of comma separated strings, each of which will presumably be of the form
name=value.
If a non-zero timeout is specified, with to, then getty will exit within
the indicated number of seconds, either having received a login name and
passed control to login, or having received an alarm signal, and exited.
This may be useful to hangup dial in lines.
The terminal settings are no longer reset to system defaults before in-
voking login(8). You are now allowed to override them in the gettytab
entry.
Getty inherits its settings (including parity and character size) from
the system defaults (set with the -D option to stty(1)).
Even parity may be specified with ep or odd parity with op. The ap option
disables input parity checking (and may be used in conjunction with ep or
op). np sets 8-bit characters with no parity.
SEE ALSOlogin(8), termcap(5), getty(8).
BUGS
In all cases, '#' or '^H' typed in a login name will be treated as an
erase character, and '@' will be treated as a kill character.
The he capability is stupid.
The termcap format is horrid, something more rational should have been
chosen.
HISTORY
The gettytab file format appeared in 4.2BSD.
4.2 Berkeley Distribution April 19, 1994 3