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TSET(1)								       TSET(1)

NAME    [Toc]    [Back]

     tset - terminal dependent initialization

SYNOPSIS    [Toc]    [Back]

     tset [ options ]

DESCRIPTION    [Toc]    [Back]

     Tset causes terminal dependent processing such as setting erase and kill
     characters, setting or resetting delays, and the like.  It	first
     determines	the type of terminal involved, names for which are specified
     by	the /usr/lib/terminfo data base, and then does necessary
     initializations and mode settings.	 In the	case where no argument types
     are specified, tset simply	reads the terminal type	out of the environment
     variable TERM and re-initializes the terminal.  The rest of this manual
     concerns itself with type initialization, done typically once at login,
     and options used at initialization	time to	determine the terminal type
     and set up	terminal modes.

     When used in a startup script ".profile" (for sh(1) users)	or ".login"
     (for csh(1) users), it is desirable to give information about the types
     of	terminal usually used, for terminals which are connected to the
     computer through a	modem.	These ports are	initially identified as	being
     dialup or plugboard or arpanet etc.  To specify what terminal type	is
     usually used on these ports, -m is	followed by the	appropriate port type
     identifier, an optional baud-rate specification, and the terminal type to
     be	used if	the mapping conditions are satisfied.  If more than one
     mapping is	specified, the first applicable	mapping	prevails.  A missing
     type identifier matches all identifiers.

     Baud rates	are specified as with stty(1), and are compared	with the speed
     of	the diagnostic output (which is	almost always the control terminal).
     The baud rate test	may be any combination of:  >, =, <, @,	and !; @ is a
     synonym for = and ! inverts the sense of the test.	 To avoid problems
     with metacharacters, it is	best to	place the entire argument to -m	within
     ''	characters; users of csh(1) must also put a "\"	before any "!" used


	  tset -m 'dialup>300:adm3a' -m	dialup:dw2

     causes the	terminal type to be set	to an adm3a if the port	in use is a
     dialup at a speed greater than 300	baud; to a dw2 if the port is
     (otherwise) a dialup (i.e., at 300	baud or	less).	If the type above
     begins with a question mark, the user is asked if the user	really wants
     that type.	 A null	response means to use that type; otherwise, another
     type can be entered which will be used instead.  For other	ports the port
     type will be taken	from the /etc/ttytype file or a	final, default type
     option may	be given on the	command	line not preceded by a -m.  A ttytype
     may be preceded with a question mark in /etc/ttytype for prompting	(this
     is	an enhancement over standard tset).

									Page 1

TSET(1)								       TSET(1)

     It	is often desirable to return the terminal type,	as specified by	the -m
     options, and information about the	terminal to a shell's environment.
     This can be done using the	-s option; using the Bourne shell, sh(1):

	  eval `tset -s	options	... `

     or	using the C shell, csh(1):

	  tset -s options ... >	tset$$
	  source tset$$
	  rm tset$$

     These commands cause tset to generate as output a sequence	of shell
     commands which place the variable TERM in the environment;	see

     Once the terminal type is known, tset engages in terminal mode setting.
     This normally involves sending an initialization sequence to the terminal
     and setting the single character erase (and optionally the	line-kill
     (full line	erase))	characters.

     On	terminals that can backspace but not overstrike	(such as a CRT), and
     when the erase character is the default erase character (``#'' on
     standard systems),	the erase character is changed to a ^H (backspace).

     Other options are:

     -e	 set the erase character to be the named character c on	all terminals,
	 the default being the backspace character on the terminal, usually

     -k	 is similar to -e but for the line kill	character rather than the
	 erase character; c defaults to	^X (for	purely historical reasons); ^U
	 is the	preferred setting.  No kill processing is done if -k is	not

     -h	 do not	read the terminal type from the	environment variable TERM.

     -I	 suppresses outputting terminal	initialization strings.

     -Q	 suppresses printing the ``Erase set to'' and ``Kill set to''

     -S	 Outputs just the strings to be	assigned to TERM rather	than commands
	 for a shell.

EXAMPLES    [Toc]    [Back]

     A typical csh ".login" file using tset would be:

	  set noglob
	  set tmp = `tset - -m dialup:?h19 -Q`
	  setenv TERM "$tmp[1]"

									Page 2

TSET(1)								       TSET(1)

	  unset	tmp noglob

     This ".login" sets	the environment	variable TERM for the user's current
     terminal according	to the file /etc/ttytype . If the terminal line	is a
     dialup line, the user is prompted for the proper terminal type.

ENVIRONMENT    [Toc]    [Back]

     tset determines which set of commands to use (setenv vs export) by
     looking at	the SHELL environment variable when the	-s option is given.
     This is not a problem at login, but for testing shell's other than	one's
     normal shell, it may be necessary to change the SHELL variable in your

FILES    [Toc]    [Back]

     /etc/ttytype	   terminal id to type map database
     /usr/lib/terminfo	   terminal capability database

SEE ALSO    [Toc]    [Back]

     csh(1), sh(1), stty(1), environ(4), ttytype(4), terminfo(4).

NOTES    [Toc]    [Back]

     For compatibility with earlier versions of	tset, a	number of flags	are
     accepted whose use	is discouraged:

     -d	type   equivalent to -m	dialup:type

     -p	type   equivalent to -m	plugboard:type

     -a	type   equivalent to -m	arpanet:type

     -E	c      Sets the	erase character	to c only if the terminal can

     -	       prints the terminal type	on the standard	output

     -r	       prints the terminal type	on the diagnostic output.

									PPPPaaaaggggeeee 3333
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