release/src/router/libncurses/doc/html/man/tset.1.html

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  41 <H1 class="no-header">tset 1</H1>
  42 <PRE>
  43 <STRONG><A HREF="tset.1.html">tset(1)</A></STRONG>                                                         <STRONG><A HREF="tset.1.html">tset(1)</A></STRONG>
  44
  45
  46
  47
  48 </PRE>
  49 <H2><a name="h2-NAME">NAME</a></H2><PRE>
  50        <STRONG>tset</STRONG>, <STRONG>reset</STRONG> - terminal initialization
  51
  52
  53 </PRE>
  54 <H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
  55        <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>]
  56        [<EM>terminal</EM>]
  57        <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>]
  58        [<EM>terminal</EM>]
  59
  60
  61 </PRE>
  62 <H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
  63        <STRONG>Tset</STRONG>  initializes  terminals.   <STRONG>Tset</STRONG>  first determines the
  64        type of terminal that you are using.   This  determination
  65        is done as follows, using the first terminal type found.
  66
  67        1. The <STRONG>terminal</STRONG> argument specified on the command line.
  68
  69        2. The value of the <STRONG>TERM</STRONG> environmental variable.
  70
  71        3.  (BSD  systems only.) The terminal type associated with
  72        the standard error output device in  the  <EM>/etc/ttys</EM>  file.
  73        (On  System-V-like  UNIXes  and systems using that conven-
  74        tion, <EM>getty</EM> does this job by setting <STRONG>TERM</STRONG> according to the
  75        type passed to it by <EM>/etc/inittab</EM>.)
  76
  77        4. The default terminal type, "unknown".
  78
  79        If  the  terminal  type  was not specified on the command-
  80        line, the <STRONG>-m</STRONG> option mappings are  then  applied  (see  the
  81        section  <STRONG>TERMINAL</STRONG>  <STRONG>TYPE</STRONG>  <STRONG>MAPPING</STRONG>  for  more  information).
  82        Then, if the terminal type begins  with  a  question  mark
  83        ("?"), the user is prompted for confirmation of the termi-
  84        nal type.   An  empty  response  confirms  the  type,  or,
  85        another  type  can be entered to specify a new type.  Once
  86        the terminal type has been determined, the terminfo  entry
  87        for  the  terminal  is retrieved.  If no terminfo entry is
  88        found for the type, the user is prompted for another  ter-
  89        minal type.
  90
  91        Once  the  terminfo  entry  is retrieved, the window size,
  92        backspace, interrupt and line kill characters (among  many
  93        other things) are set and the terminal and tab initializa-
  94        tion strings  are  sent  to  the  standard  error  output.
  95        Finally,  if the erase, interrupt and line kill characters
  96        have changed, or are not  set  to  their  default  values,
  97        their  values  are displayed to the standard error output.
  98        Use the <STRONG>-c</STRONG> or <STRONG>-w</STRONG> option to select only the  window  sizing
  99        versus  the  other  initialization.   If neither option is
 100        given, both are assumed.
 101
 102        When invoked as <STRONG>reset</STRONG>, <STRONG>tset</STRONG> sets cooked  and  echo  modes,
 103        turns  off cbreak and raw modes, turns on newline transla-
 104        tion and resets any  unset  special  characters  to  their
 105        default  values  before  doing the terminal initialization
 106        described above.  This is  useful  after  a  program  dies
 107        leaving  a  terminal  in an abnormal state.  Note, you may
 108        have to type
 109
 110            <STRONG>&lt;LF&gt;reset&lt;LF&gt;</STRONG>
 111
 112        (the line-feed character is normally control-J) to get the
 113        terminal to work, as carriage-return may no longer work in
 114        the abnormal state.  Also, the  terminal  will  often  not
 115        echo the command.
 116
 117        The options are as follows:
 118
 119        <STRONG>-c</STRONG>   Set control characters and modes.
 120
 121        <STRONG>-e</STRONG>   Set the erase character to <EM>ch</EM>.
 122
 123        <STRONG>-I</STRONG>   Do  not  send  the  terminal  or  tab  initialization
 124             strings to the terminal.
 125
 126        <STRONG>-i</STRONG>   Set the interrupt character to <EM>ch</EM>.
 127
 128        <STRONG>-k</STRONG>   Set the line kill character to <EM>ch</EM>.
 129
 130        <STRONG>-m</STRONG>   Specify a mapping from a port  type  to  a  terminal.
 131             See the section <STRONG>TERMINAL</STRONG> <STRONG>TYPE</STRONG> <STRONG>MAPPING</STRONG> for more infor-
 132             mation.
 133
 134        <STRONG>-Q</STRONG>   Do not display any values for  the  erase,  interrupt
 135             and line kill characters.  Normally <STRONG>tset</STRONG> displays the
 136             values for control characters which differ  from  the
 137             system's default values.
 138
 139        <STRONG>-q</STRONG>   The  terminal  type is displayed to the standard out-
 140             put, and the terminal is not initialized in any  way.
 141             The option `-' by itself is equivalent but archaic.
 142
 143        <STRONG>-r</STRONG>   Print the terminal type to the standard error output.
 144
 145        <STRONG>-s</STRONG>   Print  the  sequence  of shell commands to initialize
 146             the environment variable <STRONG>TERM</STRONG> to the standard output.
 147             See the section <STRONG>SETTING</STRONG> <STRONG>THE</STRONG> <STRONG>ENVIRONMENT</STRONG> for details.
 148
 149        <STRONG>-V</STRONG>   reports the version of ncurses which was used in this
 150             program, and exits.
 151
 152        <STRONG>-w</STRONG>   Resize the window  to  match  the  size  deduced  via
 153             <STRONG>setupterm</STRONG>.   Normally  this  has  no  effect,  unless
 154             <STRONG>setupterm</STRONG> is not able to detect the window size.
 155
 156        The arguments for the <STRONG>-e</STRONG>, <STRONG>-i</STRONG>, and <STRONG>-k</STRONG> options may either be
 157        entered  as  actual characters or by using the `hat' nota-
 158        tion, i.e., control-h may be specified as "^H" or "^h".
 159
 160
 161 </PRE>
 162 <H2><a name="h2-SETTING-THE-ENVIRONMENT">SETTING THE ENVIRONMENT</a></H2><PRE>
 163        It is often desirable  to  enter  the  terminal  type  and
 164        information  about  the  terminal's  capabilities into the
 165        shell's environment.  This is done using the <STRONG>-s</STRONG> option.
 166
 167        When the <STRONG>-s</STRONG> option is specified, the commands to enter the
 168        information  into  the  shell's environment are written to
 169        the standard output.  If the <STRONG>SHELL</STRONG> environmental  variable
 170        ends  in  "csh", the commands are for <STRONG>csh</STRONG>, otherwise, they
 171        are for <STRONG>sh</STRONG>.  Note, the <STRONG>csh</STRONG>  commands  set  and  unset  the
 172        shell  variable  <STRONG>noglob</STRONG>,  leaving it unset.  The following
 173        line in the <STRONG>.login</STRONG> or <STRONG>.profile</STRONG> files will  initialize  the
 174        environment correctly:
 175
 176            eval `tset -s options ... `
 177
 178
 179 </PRE>
 180 <H2><a name="h2-TERMINAL-TYPE-MAPPING">TERMINAL TYPE MAPPING</a></H2><PRE>
 181        When the terminal is not hardwired into the system (or the
 182        current system information is incorrect) the terminal type
 183        derived  from the <EM>/etc/ttys</EM> file or the <STRONG>TERM</STRONG> environmental
 184        variable is often something generic like <STRONG>network</STRONG>,  <STRONG>dialup</STRONG>,
 185        or  <STRONG>unknown</STRONG>.   When <STRONG>tset</STRONG> is used in a startup script it is
 186        often desirable to provide information about the  type  of
 187        terminal used on such ports.
 188
 189        The  purpose  of  the <STRONG>-m</STRONG> option is to map from some set of
 190        conditions to a terminal type, that is, to tell  <STRONG>tset</STRONG>  "If
 191        I'm  on this port at a particular speed, guess that I'm on
 192        that kind of terminal".
 193
 194        The argument to the <STRONG>-m</STRONG> option consists of an optional port
 195        type, an optional operator, an optional baud rate specifi-
 196        cation, an optional colon (":") character and  a  terminal
 197        type.   The port type is a string (delimited by either the
 198        operator or the colon character).  The operator may be any
 199        combination  of  "&gt;", "&lt;", "@", and "!"; "&gt;" means greater
 200        than, "&lt;" means less than, "@"  means  equal  to  and  "!"
 201        inverts the sense of the test.  The baud rate is specified
 202        as a number and is compared with the speed of the standard
 203        error  output (which should be the control terminal).  The
 204        terminal type is a string.
 205
 206        If the terminal type is not specified on the command line,
 207        the  <STRONG>-m</STRONG> mappings are applied to the terminal type.  If the
 208        port type and baud rate match the  mapping,  the  terminal
 209        type  specified  in the mapping replaces the current type.
 210        If more than one mapping is specified, the first  applica-
 211        ble mapping is used.
 212
 213        For    example,    consider    the    following   mapping:
 214        <STRONG>dialup&gt;9600:vt100</STRONG>.  The port type is dialup , the operator
 215        is  &gt;, the baud rate specification is 9600, and the termi-
 216        nal type is vt100.  The result of this mapping is to spec-
 217        ify that if the terminal type is <STRONG>dialup</STRONG>, and the baud rate
 218        is greater than 9600 baud, a terminal type of  <STRONG>vt100</STRONG>  will
 219        be used.
 220
 221        If no baud rate is specified, the terminal type will match
 222        any baud rate.  If no port type is specified, the terminal
 223        type   will   match   any  port  type.   For  example,  <STRONG>-m</STRONG>
 224        <STRONG>dialup:vt100</STRONG>  <STRONG>-m</STRONG>  <STRONG>:?xterm</STRONG>  will  cause  any  dialup  port,
 225        regardless of baud rate, to match the terminal type vt100,
 226        and any non-dialup port type to match  the  terminal  type
 227        ?xterm.   Note,  because of the leading question mark, the
 228        user will be queried on a default port as to whether  they
 229        are actually using an xterm terminal.
 230
 231        No  whitespace  characters  are permitted in the <STRONG>-m</STRONG> option
 232        argument.  Also, to avoid problems  with  meta-characters,
 233        it  is  suggested  that  the  entire <STRONG>-m</STRONG> option argument be
 234        placed within single quote characters, and that <STRONG>csh</STRONG>  users
 235        insert  a backslash character ("\") before any exclamation
 236        marks ("!").
 237
 238
 239 </PRE>
 240 <H2><a name="h2-HISTORY">HISTORY</a></H2><PRE>
 241        The <STRONG>tset</STRONG> command appeared in BSD 3.0.  The <STRONG>ncurses</STRONG>  imple-
 242        mentation  was lightly adapted from the 4.4BSD sources for
 243        a terminfo environment by Eric S. Raymond &lt;esr@snark.thyr-
 244        sus.com&gt;.
 245
 246
 247 </PRE>
 248 <H2><a name="h2-COMPATIBILITY">COMPATIBILITY</a></H2><PRE>
 249        The  <STRONG>tset</STRONG>  utility has been provided for backward-compati-
 250        bility with BSD environments (under  most  modern  UNIXes,
 251        <STRONG>/etc/inittab</STRONG>  and  <STRONG>getty(1)</STRONG> can set <STRONG>TERM</STRONG> appropriately for
 252        each dial-up line; this  obviates  what  was  <STRONG>tset</STRONG>'s  most
 253        important  use).   This implementation behaves like 4.4BSD
 254        tset, with a few exceptions specified here.
 255
 256        The <STRONG>-S</STRONG> option of BSD tset no longer works;  it  prints  an
 257        error message to stderr and dies.  The <STRONG>-s</STRONG> option only sets
 258        <STRONG>TERM</STRONG>, not <STRONG>TERMCAP</STRONG>.  Both of these changes are because  the
 259        <STRONG>TERMCAP</STRONG>  variable  is  no longer supported under terminfo-
 260        based <STRONG>ncurses</STRONG>, which makes <STRONG>tset</STRONG> <STRONG>-S</STRONG> useless (we made it die
 261        noisily rather than silently induce lossage).
 262
 263        There  was  an  undocumented  4.4BSD feature that invoking
 264        tset via a link named `TSET` (or via any other name begin-
 265        ning  with  an  upper-case letter) set the terminal to use
 266        upper-case only.  This feature has been omitted.
 267
 268        The <STRONG>-A</STRONG>, <STRONG>-E</STRONG>, <STRONG>-h</STRONG>, <STRONG>-u</STRONG> and <STRONG>-v</STRONG> options were  deleted  from  the
 269        <STRONG>tset</STRONG>  utility  in 4.4BSD.  None of them were documented in
 270        4.3BSD and all are of limited utility at  best.   The  <STRONG>-a</STRONG>,
 271        <STRONG>-d</STRONG>, and <STRONG>-p</STRONG> options are similarly not documented or useful,
 272        but were retained as they appear to be in widespread  use.
 273        It  is  strongly recommended that any usage of these three
 274        options be changed to use the <STRONG>-m</STRONG> option instead.   The  <STRONG>-n</STRONG>
 275        option  remains, but has no effect.  The <STRONG>-adnp</STRONG> options are
 276        therefore omitted from the usage summary above.
 277
 278        It is still permissible to specify  the  <STRONG>-e</STRONG>,  <STRONG>-i</STRONG>,  and  <STRONG>-k</STRONG>
 279        options  without arguments, although it is strongly recom-
 280        mended that such usage be fixed to explicitly specify  the
 281        character.
 282
 283        As  of  4.4BSD,  executing <STRONG>tset</STRONG> as <STRONG>reset</STRONG> no longer implies
 284        the <STRONG>-Q</STRONG> option.  Also, the interaction between the - option
 285        and the <EM>terminal</EM> argument in some historic implementations
 286        of <STRONG>tset</STRONG> has been removed.
 287
 288
 289 </PRE>
 290 <H2><a name="h2-ENVIRONMENT">ENVIRONMENT</a></H2><PRE>
 291        The <STRONG>tset</STRONG> command uses these environment variables:
 292
 293        SHELL
 294             tells <STRONG>tset</STRONG> whether to initialize <STRONG>TERM</STRONG> using <STRONG>sh</STRONG> or <STRONG>csh</STRONG>
 295             syntax.
 296
 297        TERM Denotes  your  terminal  type.  Each terminal type is
 298             distinct, though many are similar.
 299
 300        TERMCAP
 301             may denote the location of a termcap database.  If it
 302             is not an absolute pathname, e.g., begins with a `/',
 303             <STRONG>tset</STRONG> removes the variable from the environment before
 304             looking for the terminal description.
 305
 306
 307 </PRE>
 308 <H2><a name="h2-FILES">FILES</a></H2><PRE>
 309        /etc/ttys
 310             system  port  name  to terminal type mapping database
 311             (BSD versions only).
 312
 313        /usr/share/terminfo
 314             terminal capability database
 315
 316
 317 </PRE>
 318 <H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
 319        <STRONG>csh(1)</STRONG>,   <STRONG>sh(1)</STRONG>,   <STRONG>stty(1)</STRONG>,   <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG>,   <STRONG>tty(4)</STRONG>,
 320        <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>, <STRONG>ttys(5)</STRONG>, <STRONG>environ(7)</STRONG>
 321
 322        This describes <STRONG>ncurses</STRONG> version 6.0 (patch 20150808).
 323
 324
 325
 326                                                                 <STRONG><A HREF="tset.1.html">tset(1)</A></STRONG>
 327 </PRE>
 328 <div class="nav">
 329 <ul>
 330 <li><a href="#h2-NAME">NAME</a></li>
 331 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
 332 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
 333 <li><a href="#h2-SETTING-THE-ENVIRONMENT">SETTING THE ENVIRONMENT</a></li>
 334 <li><a href="#h2-TERMINAL-TYPE-MAPPING">TERMINAL TYPE MAPPING</a></li>
 335 <li><a href="#h2-HISTORY">HISTORY</a></li>
 336 <li><a href="#h2-COMPATIBILITY">COMPATIBILITY</a></li>
 337 <li><a href="#h2-ENVIRONMENT">ENVIRONMENT</a></li>
 338 <li><a href="#h2-FILES">FILES</a></li>
 339 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
 340 </ul>
 341 </div>
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