gno/usr.sbin/getty/gettytab.5G
gdr-ftp 7d184b3391 Various changes to get getty compiling under GNO v2.0.6. In general
they are:
	- changed the makefile
	- prototyped functions
	- eliminated pathnames.h since all it does is #include <paths.h>
	- used gettytab.h for various function declarations
	- verified stack usage at 712 bytes
	- eliminated dummy gethostname() function.  Instead, get it
	  from libc.  This exposes a problem with gethostname.
	  See PR#59 for details.
	- eliminated a dependancy on strftime for the moment by
	  calling ctime() instead.
	- Added GNO-formatted versions of the man pages.
1998-04-10 16:18:06 +00:00

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.\" Copyright (c) 1983, 1991 The Regents of the University of California.
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.\" @(#)gettytab.5 6.7 (Berkeley) 5/10/91
.\"
.TH GETTYTAB 5 "8 April 1998" GNO "File Formats"
.SH NAME
.BR gettytab
\- terminal configuration data base
.SH SYNOPSIS
.BR gettytab
.SH DESCRIPTION
The
.BR gettytab
file
is a simplified version of the
.BR termcap (5)
data base
used to describe terminal lines.
The initial terminal login process
.BR getty (8)
accesses the
.BR 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.
.LP
There is a default terminal class,
.IR default ,
that is used to set global defaults for all other classes.
(That is, the
.IR default
entry is read, then the entry for the class required
is used to override particular settings.)
.SH CAPABILITIES
Refer to
.BR termcap (5)
for a description of the file layout.
The
.IR default
column below lists defaults obtained if there is
no entry in the table obtained, nor one in the special
.IR default
table.
.nf
\fBName Type Default Description\fR
ap bool false terminal uses any parity
bd num 0 backspace delay
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 '\en' after login prompt
ds str \`^Y\' delayed suspend character
dx bool false set DECCTLQ
ec bool false leave echo OFF
ep bool false terminal uses even parity
er str \`^?\' erase character
et str \`^D\' end of text (EOF 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 NOT hangup line on last close
he str NULL hostname editing string
hn str hostname hostname
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
kl str \`^U\' kill character
lc bool false terminal has lower case
lm str login: login prompt
ln str \`^V\' ``literal next'' character
lo str /usr/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
pc str \`\e0\' pad character
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 \`\&^\e\' quit character
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)
uc bool false terminal is known upper case only
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
.fi
.LP
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.
.LP
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
with one of the
.IR \&f0 ,
.IR \&f1 ,
or
.IR \&f2
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
of this (32 bit) value.
.LP
Should
.BR getty
receive a null character
(presumed to indicate a line break)
it will restart using the table indicated by the
.IR nx
entry. If there is none, it will re-use its original table.
.LP
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.
.LP
The
.IR \&cl
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
.IR \&pc .
.LP
The initial message, and login message,
.IR \&im
and
.IR \&lm
may include the character sequence
.IR \&%h
or
.IR \&%t
to obtain
the hostname or tty name respectively.
.RI ( %%
obtains a single '%' character.)
The hostname is normally obtained from the system,
but may be set by the
.IR \&hn
table entry.
In either case it may be edited with
.IR \&he .
The
.IR \&he
string is a sequence of characters, each character that
is neither '@' nor '#' is copied into the final hostname.
A '@' in the
.IR \&he
string, causes one character from the real hostname to
be copied to the final hostname.
A '#' in the
.IR \&he
string, causes the next character of the real hostname
to be skipped.
Surplus '@' and '#' characters are ignored.
.LP
When getty execs the login process, given
in the
.IR \&lo
string (usually
.BR /usr/bin/login ),
it will have set
the enviroment to include the terminal type, as indicated
by the
.IR \&tt
string (if it exists).
The
.IR \&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
.IR name=value .
.LP
If a non-zero timeout is specified, with
.IR \&to ,
then getty will exit within the indicated
number of seconds, either having
received a login name and passed control
to
.BR login ,
or having received an alarm signal, and exited.
This may be useful to hangup dial in lines.
.LP
Output from
.BR getty
is even parity unless
.IR \&op
is specified.
The
.IR \&op
string
may be specified with
.IR \&ap
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
implementation.
.BR Getty
does not check parity of input characters in
.BR RAW
mode.
.SH SEE ALSO
.BR login (1),
.BR termcap (5),
.BR getty (8).
.SH BUGS
The special characters (erase, kill, etc.) are reset to system defaults
by
.BR login (1).
In
.IR all
cases, '#' or '^H' typed in a login name will be treated as
an erase character, and '@' will be treated as a kill character.
.LP
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.
.LP
The
.IR \&he
capability is stupid.
.LP
The
.BR termcap
format is horrid, something more rational should
have been chosen.
.SH HISTORY
The
.BR gettytab
file format appeared in 4.2BSD.