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            <H1>tset 1</H1>

            
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            <PRE>

            
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            <STRONG><A HREF="tset.1.html">tset(1)</A></STRONG>                                                         <STRONG><A HREF="tset.1.html">tset(1)</A></STRONG>


            </PRE>

            
            <H2>NAME</H2><PRE>

            
                   <STRONG>tset</STRONG>, <STRONG>reset</STRONG> - terminal initialization


            </PRE>

            
            <H2>SYNOPSIS</H2><PRE>

            
                   <STRONG>tset</STRONG>  [<STRONG>-IQVcqrsw</STRONG>] [<STRONG>-</STRONG>] [<STRONG>-e</STRONG> <EM>ch</EM>] [<STRONG>-i</STRONG> <EM>ch</EM>] [<STRONG>-k</STRONG> <EM>ch</EM>] [<STRONG>-m</STRONG> <EM>mapping</EM>]

            
                   [<EM>terminal</EM>]

            
                   <STRONG>reset</STRONG> [<STRONG>-IQVcqrsw</STRONG>] [<STRONG>-</STRONG>] [<STRONG>-e</STRONG> <EM>ch</EM>] [<STRONG>-i</STRONG> <EM>ch</EM>] [<STRONG>-k</STRONG> <EM>ch</EM>] [<STRONG>-m</STRONG> <EM>mapping</EM>]

            
                   [<EM>terminal</EM>]


            </PRE>

            
            <H2>DESCRIPTION</H2><PRE>

            
                   <STRONG>Tset</STRONG>  initializes  terminals.   <STRONG>Tset</STRONG>  first determines the

            
                   type of terminal that you are using.   This  determination

            
                   is done as follows, using the first terminal type found.


                   1. The <STRONG>terminal</STRONG> argument specified on the command line.


                   2. The value of the <STRONG>TERM</STRONG> environmental variable.


                   3.  (BSD  systems only.) The terminal type associated with

            
                   the standard error output device in  the  <EM>/etc/ttys</EM>  file.

            
                   (On Linux and System-V-like UNIXes, <EM>getty</EM> does this job by

            
                   setting <STRONG>TERM</STRONG>  according  to  the  type  passed  to  it  by

            
                   <EM>/etc/inittab</EM>.)


                   4. The default terminal type, ``unknown''.


                   If  the  terminal  type  was not specified on the command-

            
                   line, the <STRONG>-m</STRONG> option mappings are  then  applied  (see  the

            
                   section  <STRONG>TERMINAL</STRONG>  <STRONG>TYPE</STRONG>  <STRONG>MAPPING</STRONG>  for  more  information).

            
                   Then, if the terminal type begins  with  a  question  mark

            
                   (``?''), the user is prompted for confirmation of the ter-

            
                   minal type.  An empty  response  confirms  the  type,  or,

            
                   another  type  can be entered to specify a new type.  Once

            
                   the terminal type has been determined, the terminfo  entry

            
                   for  the  terminal  is retrieved.  If no terminfo entry is

            
                   found for the type, the user is prompted for another  ter-

            
                   minal type.


                   Once  the  terminfo  entry  is retrieved, the window size,

            
                   backspace, interrupt and line kill characters (among  many

            
                   other things) are set and the terminal and tab initializa-

            
                   tion strings  are  sent  to  the  standard  error  output.

            
                   Finally,  if the erase, interrupt and line kill characters

            
                   have changed, or are not  set  to  their  default  values,

            
                   their  values  are displayed to the standard error output.

            
                   Use the <STRONG>-c</STRONG> or <STRONG>-w</STRONG> option to select only the  window  sizing

            
                   versus  the  other  initialization.   If neither option is

            
                   given, both are assumed.


                   When invoked as <STRONG>reset</STRONG>, <STRONG>tset</STRONG> sets cooked  and  echo  modes,

            
                   turns  off cbreak and raw modes, turns on newline transla-

            
                   tion and resets any  unset  special  characters  to  their

            
                   default  values  before  doing the terminal initialization

            
                   described above.  This is  useful  after  a  program  dies

            
                   leaving  a  terminal  in an abnormal state.  Note, you may

            
                   have to type


                       <STRONG>&lt;LF&gt;reset&lt;LF&gt;</STRONG>


                   (the line-feed character is normally control-J) to get the

            
                   terminal to work, as carriage-return may no longer work in

            
                   the abnormal state.  Also, the  terminal  will  often  not

            
                   echo the command.


                   The options are as follows:


                   <STRONG>-c</STRONG>   Set  control  characters and modes.  <STRONG>-e</STRONG> Set the erase

            
                        character to <EM>ch</EM>.


                   <STRONG>-I</STRONG>   Do  not  send  the  terminal  or  tab  initialization

            
                        strings to the terminal.


                   <STRONG>-i</STRONG>   Set the interrupt character to <EM>ch</EM>.


                   <STRONG>-k</STRONG>   Set the line kill character to <EM>ch</EM>.


                   <STRONG>-m</STRONG>   Specify  a  mapping  from  a port type to a terminal.

            
                        See the section <STRONG>TERMINAL</STRONG> <STRONG>TYPE</STRONG> <STRONG>MAPPING</STRONG> for more infor-

            
                        mation.


                   <STRONG>-Q</STRONG>   Do  not  display  any values for the erase, interrupt

            
                        and line kill characters.  Normally <STRONG>tset</STRONG> displays the

            
                        values  for  control characters which differ from the

            
                        system's default values.


                   <STRONG>-q</STRONG>   The terminal type is displayed to the  standard  out-

            
                        put,  and the terminal is not initialized in any way.

            
                        The option `-' by itself is equivalent but archaic.


                   <STRONG>-r</STRONG>   Print the terminal type to the standard error output.


                   <STRONG>-s</STRONG>   Print  the  sequence  of shell commands to initialize

            
                        the environment variable <STRONG>TERM</STRONG> to the standard output.

            
                        See  the section <STRONG>SETTING</STRONG> <STRONG>THE</STRONG> <STRONG>ENVIRONMENT</STRONG> for details.


                   <STRONG>-V</STRONG>   reports the version of ncurses which was used in this

            
                        program, and exits.


                   <STRONG>-w</STRONG>   Resize  the  window  to  match  the  size deduced via

            
                        <STRONG>setupterm</STRONG>.   Normally  this  has  no  effect,  unless

            
                        <STRONG>setupterm</STRONG> is not able to detect the window size.


                   The arguments for the <STRONG>-e</STRONG>, <STRONG>-i</STRONG>, and <STRONG>-k</STRONG> options may either be

            
                   entered as actual characters or by using the  `hat'  nota-

            
                   tion, i.e. control-h may be specified as ``^H'' or ``^h''.


            </PRE>

            
            <H2>SETTING THE ENVIRONMENT</H2><PRE>

            
                   It is often desirable  to  enter  the  terminal  type  and

            
                   information  about  the  terminal's  capabilities into the

            
                   shell's environment.  This is done using the <STRONG>-s</STRONG> option.


                   When the <STRONG>-s</STRONG> option is specified, the commands to enter the

            
                   information  into  the  shell's environment are written to

            
                   the standard output.  If the <STRONG>SHELL</STRONG> environmental  variable

            
                   ends in ``csh'', the commands are for <STRONG>csh</STRONG>, otherwise, they

            
                   are for <STRONG>sh</STRONG>.  Note, the <STRONG>csh</STRONG>  commands  set  and  unset  the

            
                   shell  variable  <STRONG>noglob</STRONG>,  leaving it unset.  The following

            
                   line in the <STRONG>.login</STRONG> or <STRONG>.profile</STRONG> files will  initialize  the

            
                   environment correctly:


                       eval `tset -s options ... `


            </PRE>

            
            <H2>TERMINAL TYPE MAPPING</H2><PRE>

            
                   When the terminal is not hardwired into the system (or the

            
                   current system information is incorrect) the terminal type

            
                   derived  from the <EM>/etc/ttys</EM> file or the <STRONG>TERM</STRONG> environmental

            
                   variable is often something generic like <STRONG>network</STRONG>,  <STRONG>dialup</STRONG>,

            
                   or  <STRONG>unknown</STRONG>.   When <STRONG>tset</STRONG> is used in a startup script it is

            
                   often desirable to provide information about the  type  of

            
                   terminal used on such ports.


                   The  purpose  of  the <STRONG>-m</STRONG> option is to map from some set of

            
                   conditions to a terminal type, that is, to tell <STRONG>tset</STRONG>  ``If

            
                   I'm  on this port at a particular speed, guess that I'm on

            
                   that kind of terminal''.


                   The argument to the <STRONG>-m</STRONG> option consists of an optional port

            
                   type, an optional operator, an optional baud rate specifi-

            
                   cation, an optional colon (``:'') character and a terminal

            
                   type.   The port type is a string (delimited by either the

            
                   operator or the colon character).  The operator may be any

            
                   combination of ``&gt;'', ``&lt;'', ``@'', and ``!''; ``&gt;'' means

            
                   greater than, ``&lt;'' means less than, ``@'' means equal  to

            
                   and ``!'' inverts the sense of the test.  The baud rate is

            
                   specified as a number and is compared with  the  speed  of

            
                   the  standard  error  output  (which should be the control

            
                   terminal).  The terminal type is a string.


                   If the terminal type is not specified on the command line,

            
                   the  <STRONG>-m</STRONG> mappings are applied to the terminal type.  If the

            
                   port type and baud rate match the  mapping,  the  terminal

            
                   type  specified  in the mapping replaces the current type.

            
                   If more than one mapping is specified, the first  applica-

            
                   ble mapping is used.


                   For    example,    consider    the    following   mapping:

            
                   <STRONG>dialup&gt;9600:vt100</STRONG>.  The port type is dialup , the operator

            
                   is  &gt;, the baud rate specification is 9600, and the termi-

            
                   nal type is vt100.  The result of this mapping is to spec-

            
                   ify that if the terminal type is <STRONG>dialup</STRONG>, and the baud rate

            
                   is greater than 9600 baud, a terminal type of  <STRONG>vt100</STRONG>  will

            
                   be used.


                   If no baud rate is specified, the terminal type will match

            
                   any baud rate.  If no port type is specified, the terminal

            
                   type   will   match   any  port  type.   For  example,  <STRONG>-m</STRONG>

            
                   <STRONG>dialup:vt100</STRONG>  <STRONG>-m</STRONG>  <STRONG>:?xterm</STRONG>  will  cause  any  dialup  port,

            
                   regardless of baud rate, to match the terminal type vt100,

            
                   and any non-dialup port type to match  the  terminal  type

            
                   ?xterm.   Note,  because of the leading question mark, the

            
                   user will be queried on a default port as to whether  they

            
                   are actually using an xterm terminal.


                   No  whitespace  characters  are permitted in the <STRONG>-m</STRONG> option

            
                   argument.  Also, to avoid problems  with  meta-characters,

            
                   it  is  suggested  that  the  entire <STRONG>-m</STRONG> option argument be

            
                   placed within single quote characters, and that <STRONG>csh</STRONG>  users

            
                   insert  a  backslash character (``\'') before any exclama-

            
                   tion marks (``!'').


            </PRE>

            
            <H2>HISTORY</H2><PRE>

            
                   The <STRONG>tset</STRONG> command appeared in BSD 3.0.  The <STRONG>ncurses</STRONG>  imple-

            
                   mentation  was lightly adapted from the 4.4BSD sources for

            
                   a terminfo environment by Eric S. Raymond &lt;esr@snark.thyr-

            
                   sus.com&gt;.


            </PRE>

            
            <H2>COMPATIBILITY</H2><PRE>

            
                   The  <STRONG>tset</STRONG>  utility has been provided for backward-compati-

            
                   bility with BSD environments (under  most  modern  UNIXes,

            
                   <STRONG>/etc/inittab</STRONG>  and  <STRONG><A HREF="getty.1.html">getty(1)</A></STRONG> can set <STRONG>TERM</STRONG> appropriately for

            
                   each dial-up line; this  obviates  what  was  <STRONG>tset</STRONG>'s  most

            
                   important  use).   This implementation behaves like 4.4BSD

            
                   tset, with a few exceptions specified here.


                   The <STRONG>-S</STRONG> option of BSD tset no longer works;  it  prints  an

            
                   error message to stderr and dies.  The <STRONG>-s</STRONG> option only sets

            
                   <STRONG>TERM</STRONG>, not <STRONG>TERMCAP</STRONG>.  Both these  changes  are  because  the

            
                   <STRONG>TERMCAP</STRONG>  variable  is  no longer supported under terminfo-

            
                   based <STRONG>ncurses</STRONG>, which makes <STRONG>tset</STRONG> <STRONG>-S</STRONG> useless (we made it die

            
                   noisily rather than silently induce lossage).


                   There  was  an  undocumented  4.4BSD feature that invoking

            
                   tset via a link named `TSET` (or via any other name begin-

            
                   ning  with  an  upper-case letter) set the terminal to use

            
                   upper-case only.  This feature has been omitted.


                   The <STRONG>-A</STRONG>, <STRONG>-E</STRONG>, <STRONG>-h</STRONG>, <STRONG>-u</STRONG> and <STRONG>-v</STRONG> options were  deleted  from  the

            
                   <STRONG>tset</STRONG>  utility  in 4.4BSD.  None of them were documented in

            
                   4.3BSD and all are of limited utility at  best.   The  <STRONG>-a</STRONG>,

            
                   <STRONG>-d</STRONG>, and <STRONG>-p</STRONG> options are similarly not documented or useful,

            
                   but were retained as they appear to be in widespread  use.

            
                   It  is  strongly recommended that any usage of these three

            
                   options be changed to use the <STRONG>-m</STRONG> option instead.   The  -n

            
                   option  remains, but has no effect.  The <STRONG>-adnp</STRONG> options are

            
                   therefore omitted from the usage summary above.


                   It is still permissible to specify  the  <STRONG>-e</STRONG>,  <STRONG>-i</STRONG>,  and  <STRONG>-k</STRONG>

            
                   options  without arguments, although it is strongly recom-

            
                   mended that such usage be fixed to explicitly specify  the

            
                   character.


                   As  of  4.4BSD,  executing <STRONG>tset</STRONG> as <STRONG>reset</STRONG> no longer implies

            
                   the <STRONG>-Q</STRONG> option.  Also, the interaction between the - option

            
                   and the <EM>terminal</EM> argument in some historic implementations

            
                   of <STRONG>tset</STRONG> has been removed.


            </PRE>

            
            <H2>ENVIRONMENT</H2><PRE>

            
                   The <STRONG>tset</STRONG> command uses these environment variables:


                   SHELL

            
                        tells <STRONG>tset</STRONG> whether to initialize <STRONG>TERM</STRONG> using <STRONG>sh</STRONG> or <STRONG>csh</STRONG>

            
                        syntax.


                   TERM Denotes  your  terminal  type.  Each terminal type is

            
                        distinct, though many are similar.


                   TERMCAP

            
                        may denote the location of a termcap database.  If it

            
                        is not an absolute pathname, e.g., begins with a `/',

            
                        <STRONG>tset</STRONG> removes the variable from the environment before

            
                        looking for the terminal description.


            </PRE>

            
            <H2>FILES</H2><PRE>

            
                   /etc/ttys

            
                        system  port  name  to terminal type mapping database

            
                        (BSD versions only).


                   /usr/share/terminfo

            
                        terminal capability database


            </PRE>

            
            <H2>SEE ALSO</H2><PRE>

            
                   <STRONG><A HREF="csh.1.html">csh(1)</A></STRONG>, <STRONG><A HREF="sh.1.html">sh(1)</A></STRONG>, <STRONG><A HREF="stty.1.html">stty(1)</A></STRONG>,  <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG>,  <STRONG><A HREF="tty.4.html">tty(4)</A></STRONG>,  ter-

            
                   <STRONG><A HREF="minfo.5.html">minfo(5)</A></STRONG>, <STRONG><A HREF="ttys.5.html">ttys(5)</A></STRONG>, <STRONG><A HREF="environ.7.html">environ(7)</A></STRONG>


                   This describes <STRONG>ncurses</STRONG> version 5.6 (patch 20081011).


                                                                            <STRONG><A HREF="tset.1.html">tset(1)</A></STRONG>

            
            </PRE>

            
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	<!-- Manpage converted by man2html 3.0.1 -->
	<STRONG><A HREF="tset.1.html">tset(1)</A></STRONG> <STRONG><A HREF="tset.1.html">tset(1)</A></STRONG>




	</PRE>
	<H2>NAME</H2><PRE>
	<STRONG>tset</STRONG>, <STRONG>reset</STRONG> - terminal initialization


	</PRE>
	<H2>SYNOPSIS</H2><PRE>
	<STRONG>tset</STRONG> [<STRONG>-IQVcqrsw</STRONG>] [<STRONG>-</STRONG>] [<STRONG>-e</STRONG> <EM>ch</EM>] [<STRONG>-i</STRONG> <EM>ch</EM>] [<STRONG>-k</STRONG> <EM>ch</EM>] [<STRONG>-m</STRONG> <EM>mapping</EM>]
	[<EM>terminal</EM>]
	<STRONG>reset</STRONG> [<STRONG>-IQVcqrsw</STRONG>] [<STRONG>-</STRONG>] [<STRONG>-e</STRONG> <EM>ch</EM>] [<STRONG>-i</STRONG> <EM>ch</EM>] [<STRONG>-k</STRONG> <EM>ch</EM>] [<STRONG>-m</STRONG> <EM>mapping</EM>]
	[<EM>terminal</EM>]


	</PRE>
	<H2>DESCRIPTION</H2><PRE>
	<STRONG>Tset</STRONG> initializes terminals. <STRONG>Tset</STRONG> first determines the
	type of terminal that you are using. This determination
	is done as follows, using the first terminal type found.

	1. The <STRONG>terminal</STRONG> argument specified on the command line.

	2. The value of the <STRONG>TERM</STRONG> environmental variable.

	3. (BSD systems only.) The terminal type associated with
	the standard error output device in the <EM>/etc/ttys</EM> file.
	(On Linux and System-V-like UNIXes, <EM>getty</EM> does this job by
	setting <STRONG>TERM</STRONG> according to the type passed to it by
	<EM>/etc/inittab</EM>.)

	4. The default terminal type, ``unknown''.

	If the terminal type was not specified on the command-
	line, the <STRONG>-m</STRONG> option mappings are then applied (see the
	section <STRONG>TERMINAL</STRONG> <STRONG>TYPE</STRONG> <STRONG>MAPPING</STRONG> for more information).
	Then, if the terminal type begins with a question mark
	(``?''), the user is prompted for confirmation of the ter-
	minal type. An empty response confirms the type, or,
	another type can be entered to specify a new type. Once
	the terminal type has been determined, the terminfo entry
	for the terminal is retrieved. If no terminfo entry is
	found for the type, the user is prompted for another ter-
	minal type.

	Once the terminfo entry is retrieved, the window size,
	backspace, interrupt and line kill characters (among many
	other things) are set and the terminal and tab initializa-
	tion strings are sent to the standard error output.
	Finally, if the erase, interrupt and line kill characters
	have changed, or are not set to their default values,
	their values are displayed to the standard error output.
	Use the <STRONG>-c</STRONG> or <STRONG>-w</STRONG> option to select only the window sizing
	versus the other initialization. If neither option is
	given, both are assumed.

	When invoked as <STRONG>reset</STRONG>, <STRONG>tset</STRONG> sets cooked and echo modes,
	turns off cbreak and raw modes, turns on newline transla-
	tion and resets any unset special characters to their
	default values before doing the terminal initialization
	described above. This is useful after a program dies
	leaving a terminal in an abnormal state. Note, you may
	have to type

	<STRONG><LF>reset<LF></STRONG>

	(the line-feed character is normally control-J) to get the
	terminal to work, as carriage-return may no longer work in
	the abnormal state. Also, the terminal will often not
	echo the command.

	The options are as follows:

	<STRONG>-c</STRONG> Set control characters and modes. <STRONG>-e</STRONG> Set the erase
	character to <EM>ch</EM>.

	<STRONG>-I</STRONG> Do not send the terminal or tab initialization
	strings to the terminal.

	<STRONG>-i</STRONG> Set the interrupt character to <EM>ch</EM>.

	<STRONG>-k</STRONG> Set the line kill character to <EM>ch</EM>.

	<STRONG>-m</STRONG> Specify a mapping from a port type to a terminal.
	See the section <STRONG>TERMINAL</STRONG> <STRONG>TYPE</STRONG> <STRONG>MAPPING</STRONG> for more infor-
	mation.

	<STRONG>-Q</STRONG> Do not display any values for the erase, interrupt
	and line kill characters. Normally <STRONG>tset</STRONG> displays the
	values for control characters which differ from the
	system's default values.

	<STRONG>-q</STRONG> The terminal type is displayed to the standard out-
	put, and the terminal is not initialized in any way.
	The option `-' by itself is equivalent but archaic.

	<STRONG>-r</STRONG> Print the terminal type to the standard error output.

	<STRONG>-s</STRONG> Print the sequence of shell commands to initialize
	the environment variable <STRONG>TERM</STRONG> to the standard output.
	See the section <STRONG>SETTING</STRONG> <STRONG>THE</STRONG> <STRONG>ENVIRONMENT</STRONG> for details.

	<STRONG>-V</STRONG> reports the version of ncurses which was used in this
	program, and exits.

	<STRONG>-w</STRONG> Resize the window to match the size deduced via
	<STRONG>setupterm</STRONG>. Normally this has no effect, unless
	<STRONG>setupterm</STRONG> is not able to detect the window size.

	The arguments for the <STRONG>-e</STRONG>, <STRONG>-i</STRONG>, and <STRONG>-k</STRONG> options may either be
	entered as actual characters or by using the `hat' nota-
	tion, i.e. control-h may be specified as ``^H'' or ``^h''.


	</PRE>
	<H2>SETTING THE ENVIRONMENT</H2><PRE>
	It is often desirable to enter the terminal type and
	information about the terminal's capabilities into the
	shell's environment. This is done using the <STRONG>-s</STRONG> option.

	When the <STRONG>-s</STRONG> option is specified, the commands to enter the
	information into the shell's environment are written to
	the standard output. If the <STRONG>SHELL</STRONG> environmental variable
	ends in ``csh'', the commands are for <STRONG>csh</STRONG>, otherwise, they
	are for <STRONG>sh</STRONG>. Note, the <STRONG>csh</STRONG> commands set and unset the
	shell variable <STRONG>noglob</STRONG>, leaving it unset. The following
	line in the <STRONG>.login</STRONG> or <STRONG>.profile</STRONG> files will initialize the
	environment correctly:

	eval `tset -s options ... `


	</PRE>
	<H2>TERMINAL TYPE MAPPING</H2><PRE>
	When the terminal is not hardwired into the system (or the
	current system information is incorrect) the terminal type
	derived from the <EM>/etc/ttys</EM> file or the <STRONG>TERM</STRONG> environmental
	variable is often something generic like <STRONG>network</STRONG>, <STRONG>dialup</STRONG>,
	or <STRONG>unknown</STRONG>. When <STRONG>tset</STRONG> is used in a startup script it is
	often desirable to provide information about the type of
	terminal used on such ports.

	The purpose of the <STRONG>-m</STRONG> option is to map from some set of
	conditions to a terminal type, that is, to tell <STRONG>tset</STRONG> ``If
	I'm on this port at a particular speed, guess that I'm on
	that kind of terminal''.

	The argument to the <STRONG>-m</STRONG> option consists of an optional port
	type, an optional operator, an optional baud rate specifi-
	cation, an optional colon (``:'') character and a terminal
	type. The port type is a string (delimited by either the
	operator or the colon character). The operator may be any
	combination of ``>'', ``<'', ``@'', and ``!''; ``>'' means
	greater than, ``<'' means less than, ``@'' means equal to
	and ``!'' inverts the sense of the test. The baud rate is
	specified as a number and is compared with the speed of
	the standard error output (which should be the control
	terminal). The terminal type is a string.

	If the terminal type is not specified on the command line,
	the <STRONG>-m</STRONG> mappings are applied to the terminal type. If the
	port type and baud rate match the mapping, the terminal
	type specified in the mapping replaces the current type.
	If more than one mapping is specified, the first applica-
	ble mapping is used.

	For example, consider the following mapping:
	<STRONG>dialup>9600:vt100</STRONG>. The port type is dialup , the operator
	is >, the baud rate specification is 9600, and the termi-
	nal type is vt100. The result of this mapping is to spec-
	ify that if the terminal type is <STRONG>dialup</STRONG>, and the baud rate
	is greater than 9600 baud, a terminal type of <STRONG>vt100</STRONG> will
	be used.

	If no baud rate is specified, the terminal type will match
	any baud rate. If no port type is specified, the terminal
	type will match any port type. For example, <STRONG>-m</STRONG>
	<STRONG>dialup:vt100</STRONG> <STRONG>-m</STRONG> <STRONG>:?xterm</STRONG> will cause any dialup port,
	regardless of baud rate, to match the terminal type vt100,
	and any non-dialup port type to match the terminal type
	?xterm. Note, because of the leading question mark, the
	user will be queried on a default port as to whether they
	are actually using an xterm terminal.

	No whitespace characters are permitted in the <STRONG>-m</STRONG> option
	argument. Also, to avoid problems with meta-characters,
	it is suggested that the entire <STRONG>-m</STRONG> option argument be
	placed within single quote characters, and that <STRONG>csh</STRONG> users
	insert a backslash character (``\'') before any exclama-
	tion marks (``!'').


	</PRE>
	<H2>HISTORY</H2><PRE>
	The <STRONG>tset</STRONG> command appeared in BSD 3.0. The <STRONG>ncurses</STRONG> imple-
	mentation was lightly adapted from the 4.4BSD sources for
	a terminfo environment by Eric S. Raymond <esr@snark.thyr-
	sus.com>.


	</PRE>
	<H2>COMPATIBILITY</H2><PRE>
	The <STRONG>tset</STRONG> utility has been provided for backward-compati-
	bility with BSD environments (under most modern UNIXes,
	<STRONG>/etc/inittab</STRONG> and <STRONG><A HREF="getty.1.html">getty(1)</A></STRONG> can set <STRONG>TERM</STRONG> appropriately for
	each dial-up line; this obviates what was <STRONG>tset</STRONG>'s most
	important use). This implementation behaves like 4.4BSD
	tset, with a few exceptions specified here.

	The <STRONG>-S</STRONG> option of BSD tset no longer works; it prints an
	error message to stderr and dies. The <STRONG>-s</STRONG> option only sets
	<STRONG>TERM</STRONG>, not <STRONG>TERMCAP</STRONG>. Both these changes are because the
	<STRONG>TERMCAP</STRONG> variable is no longer supported under terminfo-
	based <STRONG>ncurses</STRONG>, which makes <STRONG>tset</STRONG> <STRONG>-S</STRONG> useless (we made it die
	noisily rather than silently induce lossage).

	There was an undocumented 4.4BSD feature that invoking
	tset via a link named `TSET` (or via any other name begin-
	ning with an upper-case letter) set the terminal to use
	upper-case only. This feature has been omitted.

	The <STRONG>-A</STRONG>, <STRONG>-E</STRONG>, <STRONG>-h</STRONG>, <STRONG>-u</STRONG> and <STRONG>-v</STRONG> options were deleted from the
	<STRONG>tset</STRONG> utility in 4.4BSD. None of them were documented in
	4.3BSD and all are of limited utility at best. The <STRONG>-a</STRONG>,
	<STRONG>-d</STRONG>, and <STRONG>-p</STRONG> options are similarly not documented or useful,
	but were retained as they appear to be in widespread use.
	It is strongly recommended that any usage of these three
	options be changed to use the <STRONG>-m</STRONG> option instead. The -n
	option remains, but has no effect. The <STRONG>-adnp</STRONG> options are
	therefore omitted from the usage summary above.

	It is still permissible to specify the <STRONG>-e</STRONG>, <STRONG>-i</STRONG>, and <STRONG>-k</STRONG>
	options without arguments, although it is strongly recom-
	mended that such usage be fixed to explicitly specify the
	character.

	As of 4.4BSD, executing <STRONG>tset</STRONG> as <STRONG>reset</STRONG> no longer implies
	the <STRONG>-Q</STRONG> option. Also, the interaction between the - option
	and the <EM>terminal</EM> argument in some historic implementations
	of <STRONG>tset</STRONG> has been removed.


	</PRE>
	<H2>ENVIRONMENT</H2><PRE>
	The <STRONG>tset</STRONG> command uses these environment variables:

	SHELL
	tells <STRONG>tset</STRONG> whether to initialize <STRONG>TERM</STRONG> using <STRONG>sh</STRONG> or <STRONG>csh</STRONG>
	syntax.

	TERM Denotes your terminal type. Each terminal type is
	distinct, though many are similar.

	TERMCAP
	may denote the location of a termcap database. If it
	is not an absolute pathname, e.g., begins with a `/',
	<STRONG>tset</STRONG> removes the variable from the environment before
	looking for the terminal description.


	</PRE>
	<H2>FILES</H2><PRE>
	/etc/ttys
	system port name to terminal type mapping database
	(BSD versions only).

	/usr/share/terminfo
	terminal capability database


	</PRE>
	<H2>SEE ALSO</H2><PRE>
	<STRONG><A HREF="csh.1.html">csh(1)</A></STRONG>, <STRONG><A HREF="sh.1.html">sh(1)</A></STRONG>, <STRONG><A HREF="stty.1.html">stty(1)</A></STRONG>, <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG>, <STRONG><A HREF="tty.4.html">tty(4)</A></STRONG>, ter-
	<STRONG><A HREF="minfo.5.html">minfo(5)</A></STRONG>, <STRONG><A HREF="ttys.5.html">ttys(5)</A></STRONG>, <STRONG><A HREF="environ.7.html">environ(7)</A></STRONG>

	This describes <STRONG>ncurses</STRONG> version 5.6 (patch 20081011).



	<STRONG><A HREF="tset.1.html">tset(1)</A></STRONG>
	</PRE>
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