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TTYTAB(5)		      File Formats Manual		     TTYTAB(5)

NAME
       ttytab, ttys - terminal initialization data

DESCRIPTION
       The  /etc/ttytab	file contains information that is used by various rou-
       tines to	initialize and control the use of terminal special files. This
       information  is	read with the getttyent(3) library routines.  There is
       one line	in /etc/ttytab file per	special	file.

       The /etc/ttys file should not be	edited;	it is derived from /etc/ttytab
       by  init(8) at boot time, and is	only included for backward compatibil-
       ity with	programs that may still	require	it.

       Fields are separated by TAB and/or SPACE	characters.  Some  fields  may
       contain	more  than  one	 word and should be enclosed in	double quotes.
       Blank lines and comments	can appear anywhere in the file; comments  are
       delimited by `#'	and NEWLINE.  Unspecified fields default to NULL.  The
       first field is the terminal's entry in the device directory, /dev.  The
       second  field of	the file is the	command	to execute for the line, typi-
       cally getty(8), which performs such  tasks  as  baud-rate  recognition,
       reading	the login name,	and calling login(1).  It can be, however, any
       desired command,	for example the	start up for a window system  terminal
       emulator	 or  some other	daemon process,	and can	contain	multiple words
       if quoted.  The third field is the type of terminal normally  connected
       to  that	 tty line, as found in the termcap(5) data base	file.  The re-
       maining fields set flags	in the ty_status entry (see  getttyent(3))  or
       specify a window	system process that init(8) will maintain for the ter-
       minal line.

       As flag values, the strings on and off specify whether init should exe-
       cute the	command	given in the second field, while secure	in addition to
       on allows "root"	to login on this line.	If the console is  not	marked
       "secure,"  the system prompts for the root password before coming up in
       single-user mode.  local	in addition to on indicates that the line is a
       "local"	line; the modem	control	signals	for this line, such as Carrier
       Detect, will be ignored.	 These flag fields should not be quoted.   The
       string  window=	is followed by a quoted	command	string which init will
       execute before starting getty.

       The flag	local applies to terminals, and	enables	the  software  carrier
       mode in the kernel; the kernel ignores the state	of carrier detect when
       opening the serial port.	 Alternately, if this  field  is  set  to  any
       value other than	local, this flag disables the software carrier mode in
       the kernel, so the state	of the carrier detect is  not  ignored.	  This
       usually applies to modems.  See termio(4).

       If  the	line ends in a comment,	the comment is included	in the ty_com-
       ment field of the ttyent	structure.

       After changing the /etc/ttytab file, you	 must  notify  init(8)	before
       those changes will take effect.	To do this, use:
	      kill -1 1

EXAMPLES
       Below is	a sample /etc/ttytab file:

       console "/usr/etc/getty std.1200"   vt100	on secure
       ttyd0   "/usr/etc/getty d1200"	   dialup	on     # 555-1234
       ttyh0   "/usr/etc/getty std.9600"   hp2621-nl	on     # 254MC
       ttyh1   "/usr/etc/getty std.9600"   plugboard	on     # John's	office
       ttyp0   none			   network
       ttyp1   none			   network	off
       ttyv0   "/usr/new/xterm -L :0"	   vs100	on window="/usr/new/Xvs100 0"
       console "/usr/etc/getty -n -s	std.9600" sun	       on      secure
       console "/usr/etc/getty -n -s -l	std.9600" sun	       on      secure

       The  first  line	 permits "root"	login on the console at	1200 baud, and
       indicates that the console is physically	secure for single-user	opera-
       tion.  The second line allows dialup at 1200 baud without "root"	login,
       and the third and fourth	lines allow login at 9600 baud	with  terminal
       types  of  hp2621-nl  and plugboard, respectively.  The fifth and sixth
       lines are examples of network pseudo-ttys, ttyp0	and  ttyp1  for	 which
       getty should  not be enabled.  The seventh line shows a terminal	emula-
       tor and window-system startup  entry.   The  last  two  lines  instruct
       getty, using the	-n argument, to	run the	logintool(8) graphic login in-
       terface,	and the	-s argument instructing	 logintool  to	start  screen-
       blank(1)	with a plain black screen.  The	-l (lower case L) argument in-
       structs logintool to start lockscreen(1).  lockscreen starts  after  30
       minutes;	there is no way	to change this interval.

FILES
       /dev
       /etc/ttys
       /etc/ttytab

SEE ALSO
       login(1),  ioctl(2),  getttyent(3), termio(4), gettytab(5), termcap(5),
       getty(8), init(8), logintool(8),	ttysoftcar(8)

				19 October 1988			     TTYTAB(5)

NAME | DESCRIPTION | EXAMPLES | FILES | SEE ALSO

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