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GETTYTAB(5)		  FreeBSD File Formats Manual		   GETTYTAB(5)

NAME
     gettytab -- terminal configuration	database

DESCRIPTION
     The gettytab file is a simplified version of the termcap(5) database used
     to	describe terminal lines.  The initial terminal login process getty(8)
     accesses the gettytab file	each time it starts, allowing simpler recon-
     figuration	of terminal characteristics.  Each entry in the	database 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	Terminal uses any parity.
     bk	     str     0377	Alternative 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	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	Initial	environment.
     fl	     str     `^O'	Output flush character.
     hc	     bool    false	Do not hangup line on last close.
     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/login	       Program to execute 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 characters 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.
     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.
     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(8) 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 and for input of
     the login name, and to leave the terminal set as upon completion, are de-
     rived from	the boolean flags specified.  If the derivation	should prove
     inadequate, 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
     c_cflag, c_iflag, c_lflag,	and c_oflag fields, respectively.  Each	of
     these sets	must be	completely specified to	be effective.

     Should getty(8) 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 de-
     sired, 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(5)).  This delay	is simulated
     by	repeated use of	the pad	character pc.

     The initial message and login message (im and lm) may include any of the
     following character sequences, which expand to information	about the en-
     vironment in which	getty(8) is running:

     %d	   The current date.

     %h	   The hostname	of the machine,	which is normally obtained from	the
	   system using	gethostname(3),	but may	also be	overridden by the hn
	   table entry.

     %t	   The TTY name.

     %m, %r, %s, %v
	   The type of machine,	release	of the operating system, name of the
	   operating system, and version of the	kernel,	respectively, as re-
	   turned by uname(3).

     %%	   A `%' character.

     When getty(8) executes the	login process given in the lo string (usually
     /usr/bin/login), it will have set the environment to include the terminal
     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(8) will exit
     within the	indicated number of seconds, either having received a login
     name and passed control to	login(1), or having received an	alarm signal
     and exited.  This may be useful to	hangup dial in lines.

     Output from getty(8) 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(8) is being
     run; terminal driver limitations prevent a	more complete implementation.
     getty(8) does not check parity of input characters	in RAW mode.

     If	a pp string is specified and a PPP link	bring-up sequence is recog-
     nized, getty(8) will invoke the program referenced	by the pp option.
     This can be used to handle	incoming PPP calls.

FILES
     /etc/gettytab  Default location of	the database file.

SEE ALSO
     login(1), gethostname(3), uname(3), termcap(5), getty(8)

HISTORY
     The gettytab file format appeared in 4.2BSD.

BUGS
     The special characters (erase, kill, etc.)	are reset to system defaults
     by	login(1).

     The delay stuff is	a real crock.  Apart from its general lack of flexi-
     bility, some of the delay algorithms are not implemented.	The terminal
     driver should support sane	delay settings.

     The termcap(5) format is horrid; something	more rational should have been
     chosen.

FreeBSD	13.0			 May 27, 2017			  FreeBSD 13.0

NAME | DESCRIPTION | CAPABILITIES | FILES | SEE ALSO | HISTORY | BUGS

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