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GETTYTAB(5) BSD File Formats Manual GETTYTAB(5)

NAME

ggeettttyyttaabb - terminal configuration data base

SYNOPSIS

ggeettttyyttaabb

DESCRIPTION

The ggeettttyyttaabb file is a simplified version of the termcap(5) data base used to describe terminal lines. The initial terminal login process getty(8) accesses the ggeettttyyttaabb 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.) CCAAPPAABBIILLIITTIIEESS 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. NNaammee TTyyppee DDeeffaauulltt DDeessccrriippttiioonn ap bool false terminal uses any parity bk str 0377 alternate end of line character (input break) c0 num unused tty control flags to write messages c1 num unused tty control flags to read login name c2 num unused tty control flags to leave terminal as ce bool false use crt erase algorithm ck bool false use crt kill algorithm cl str NULL Ta 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 OFF ep bool false terminal uses even parity er str `^?' erase character et str `^D' end of text (EOF) character ev str NULL Ta initial environment 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 fl str `^O' output flush character hc bool false do NOT hangup line on last close he str NULL Ta hostname editing string hn str hostname hostname ht bool false terminal has real tabs i0 num unused tty input flags to write messages i1 num unused tty input flags to read login name i2 num unused tty input flags to leave terminal as 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 l0 num unused tty local flags to write messages l1 num unused tty local flags to read login name l2 num unused tty local flags to leave terminal as lc bool false terminal has lower case lm str login: login prompt ln str `^V' ``literal next'' character lo str /usr/bin/loginprogram to exec when name obtained mb bool false do flow control based on carrier nl bool false terminal has (or might have) a newline character np bool false terminal uses no parity (i.e.

8-bit characters)

nx str default next table (for auto speed selection) o0 num unused tty output flags to write messages o1 num unused tty output flags to read login name o2 num unused tty output flags to leave terminal as op bool false terminal uses odd parity os num unused output speed pc str `\0' 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 `^\' 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) 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 The following capabilities are no longer supported by getty(8): bd num 0 backspace delay cb bool false use crt backspace mode

cd num 0 carriage-return delay

fd num 0 form-feed (vertical motion) delay

nd num 0 newline (line-feed) delay

uc bool false terminal is known upper case only 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 inade-

quate, any (or all) of these three may be overridden with one of the c0, c1, c2, i0, i1, i2, l0, l1, l2, o0, o1, or o2 numeric specifications, which can be used to specify (usually in octal, with a leading '0') the exact values of the flags. These flags correspond to the termios ccflag, ciflag, clflag, and coflag fields, respectively. Each these sets must be completely specified to be effective. The f0, f1, and f2 are excepted for backwards compatibility with a previous incarnation of

the TTY sub-system. In these flags the bottom 16 bits of the (32 bits)

value contain the sgttyb sgflags field, while the top 16 bits represent the local mode word. 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.

Delays are specified in milliseconds, the nearest possible delay avail-

able 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.

The cl screen clear string may be preceded by a (decimal) number of mil-

liseconds of delay required (a la termcap). This delay is simulated by repeated use of the pad character pc.

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. Output from getty is even parity unless op or np is specified. The op

string may be specified with ap to allow any parity on input, but gener-

ate odd parity output. Note: this only applies while getty is being run, terminal driver limitations prevent a more complete implementation. Getty does not check parity of input characters in RAW mode.

BUGS

The special characters (erase, kill, etc.) are reset to system defaults

by login(1). In all cases, '#' or '^H' typed in a login name will be

treated as an erase character, and '@' will be treated as a kill charac-

ter.

The delay stuff is a real crock. Apart form its general lack of flexi-

bility, some of the delay algorithms are not implemented. The terminal driver should support sane delay settings. The he capability is stupid. The termcap format is horrid, something more rational should have been chosen. This should be converted to use termios(4). HISTORY The ggeettttyyttaabb file format appeared in 4.2BSD. 4.2 Berkeley Distribution April 19, 1994 4.2 Berkeley Distribution