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GROTTY(1)							     GROTTY(1)

       grotty - groff driver for typewriter-like devices

       grotty [ -bBcdfhiouUv ] [ -Fdir ] [ files... ]

       It is possible to have whitespace between the -F option and its parame‐

       grotty translates the output of GNU troff  into	a  form	 suitable  for
       typewriter-like	devices.   Normally  grotty should be invoked by using
       the groff command with a -Tascii, -Tlatin1 or -Tutf8  option  on	 ASCII
       based  systems, and with -Tcp1047 and -Tutf8 on EBCDIC based hosts.  If
       no files are given, grotty will read the standard input.	 A filename of
       - will also cause grotty to read the standard input.  Output is written
       to the standard output.

       By default, grotty emits SGR escape  sequences  (from  ISO  6429,  also
       called  ANSI  color  escapes)  to change text attributes (bold, italic,
       colors).	 This makes it possible to have eight different background and
       foreground colors; additionally, bold and italic attributes can be used
       at the same time (by using the BI font).

       The following colors are defined in tty.tmac: black, white, red, green,
       blue,  yellow, magenta, cyan.  Unknown colors are mapped to the default
       color (which is dependent on the settings  of  the  terminal;  in  most
       cases, this is black for the foreground and white for the background).

       Use the -c switch to revert to the old behaviour, printing a bold char‐
       acter c with the sequence `c BACKSPACE c' and an italic character c  by
       the  sequence  `_ BACKSPACE c'.	At the same time, color output is dis‐
       abled.	The  same  effect  can	be  achieved  by  setting  either  the
       GROFF_NO_SGR  environment  variable  or	using the `sgr' X command (see

       For SGR support, it is necessary to use the -R  option  of  less(1)  to
       disable	the  interpretation  of	 grotty's  old	output format.	Conse‐
       quently, all programs which use less as the pager program have to  pass
       this  option  to	 it.   For  man(1) in particular, either add -R to the
       $PAGER environment variable, e.g.

	      PAGER="/usr/bin/less -R"
	      export PAGER

       or use the -P option of	man  to	 set  the  pager  executable  and  its
       options, or modify the configuration file of man in a similar fashion.

       grotty's	 old  output  format  can be displayed on a terminal by piping
       through ul(1).  Pagers such as more(1) or less(1) are also able to dis‐
       play  these  sequences.	 Use either -B or -U when piping into less(1);
       use -b when piping into more(1).	 There is no need to filter the output
       through col(1) since grotty never outputs reverse line feeds.

       The font description file may contain a command

	      internalname n

       where n is a decimal integer.  If the 01 bit in n is set, then the font
       will be treated as an italic font; if the 02 bit is set, then  it  will
       be  treated  as	a  bold	 font.	The code field in the font description
       field gives the code which will be used to output the character.	  This
       code can also be used in the \N escape sequence in troff.

       -b     Suppress	the  use of overstriking for bold characters.  Ignored
	      if -c isn't used.

       -B     Use only overstriking for bold-italic characters.	 Ignored if -c
	      isn't used.

       -c     Use  grotty's old output format (see above).  This also disables
	      color output.

       -d     Ignore  all  \D  commands.   Without  this  grotty  will	render
	      \D'l...'	commands  that have at least one zero argument (and so
	      are either horizontal or vertical) using -, |, and + characters.

       -f     Use form feeds in the output.  A form feed will be output at the
	      end of each page that has no output on its last line.

       -Fdir  Prepend  directory  dir/devname  to the search path for font and
	      device description files; name is the name of the	 device,  usu‐
	      ally ascii, latin1, utf8, or cp1047.

       -h     Use  horizontal  tabs in the output.  Tabs are assumed to be set
	      every 8 columns.

       -i     Use escape sequences to set the italic text attribute instead of
	      the  underline  attribute for italic fonts (`I' and `BI').  Note
	      that  most  terminals  (including	 xterm)	 don't	support	 this.
	      Ignored if -c is active.

       -o     Suppress overstriking (other than for bold or underlined charac‐
	      ters in case the old output format has been activated with -c).

       -u     Suppress the use of underlining for italic characters.   Ignored
	      if -c isn't used.

       -U     Use  only underlining for bold-italic characters.	 Ignored if -c
	      isn't used.

       -v     Print the version number.

       grotty understands a single X command  produced	using  the  \X	escape

       \X'tty: sgr n'
	      If  n  is	 non-zero  or  missing, enable SGR output (this is the
	      default), otherwise use the old  drawing	scheme	for  bold  and

	      If set, the old drawing scheme for bold and underline (using the
	      backspace character) is active.  Colors are disabled.

	      Device description file for ascii device.

	      Font description file for font F of ascii device.

	      Device description file for latin1 device.

	      Font description file for font F of latin1 device.

	      Device description file for utf8 device.

	      Font description file for font F of utf8 device.

	      Device description file for cp1047 device.

	      Font description file for font F of cp1047 device.

	      Macros for use with grotty.

	      Additional klugdey character definitions for use with grotty.

       Note that on EBCDIC hosts, only files for the  cp1047  device  will  be

       grotty is intended only for simple documents.

       There is no support for fractional horizontal or vertical motions.

       There  is no support for \D commands other than horizontal and vertical

       Characters above the first line (ie with a vertical position of 0) can‐
       not be printed.

       Color  handling	is different compared to grops(1).  \M doesn't set the
       fill color for closed graphic objects  (which  grotty  doesn't  support
       anyway) but changes the background color of the character cell, affect‐
       ing all subsequent operations.

       groff(1), troff(1), groff_out(5), groff_font(5), groff_char(7),	ul(1),
       more(1), man(1), less(1)

Groff Version 1.18.1		   Nov	2003			     GROTTY(1)

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