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GROTTY(1)							     GROTTY(1)

NAME
       grotty - groff driver for typewriter-like devices

SYNOPSIS
       grotty [ -bBcdfhioruUv ] [ -Fdir ] [ files... ]

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

DESCRIPTION
       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 reads the standard input.  A filename	 of  -
       also  causes  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
       below).

       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.
       Note that with some man(1) versions, you	 have  to  use	the  $MANPAGER
       environment variable instead.

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

       If  the	DESC  file  contains the keyword unicode, grotty emits Unicode
       characters in UTF-8 encoding.  Otherwise, it emits characters in a sin‐
       gle-byte	 encoding depending on the data in the font description files.
       See the groff_font(5) man page for more details.

OPTIONS
       -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 renders \D'l...'
	      commands that have at least one zero argument (and so are either
	      horizontal or vertical) using -, |, and + characters.  In a sim‐
	      ilar  way,  grotty  handles  \D'p...'  commands  which   consist
	      entirely of horizontal and vertical lines.

       -f     Use  form feeds in the output.  A form feed is 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).

       -r     Use  escape  sequences to set the reverse text attribute instead
	      of the underline attribute for  italic  fonts  (`I'  and	`BI').
	      Ignored if -c is active.

       -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.

USAGE
       grotty  understands  a  single  X  command produced using the \X escape
       sequence.

       \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
	      underline.

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

       GROFF_FONT_PATH
	      A	 list of directories in which to search for the devname direc‐
	      tory  in	addition  to  the  default  ones.   See	 troff(1)  and
	      groff_font(5) for more details.

FILES
       /usr/share/groff/1.22.2/font/devascii/DESC
	      Device description file for ascii device.

       /usr/share/groff/1.22.2/font/devascii/F
	      Font description file for font F of ascii device.

       /usr/share/groff/1.22.2/font/devlatin1/DESC
	      Device description file for latin1 device.

       /usr/share/groff/1.22.2/font/devlatin1/F
	      Font description file for font F of latin1 device.

       /usr/share/groff/1.22.2/font/devutf8/DESC
	      Device description file for utf8 device.

       /usr/share/groff/1.22.2/font/devutf8/F
	      Font description file for font F of utf8 device.

       /usr/share/groff/1.22.2/font/devcp1047/DESC
	      Device description file for cp1047 device.

       /usr/share/groff/1.22.2/font/devcp1047/F
	      Font description file for font F of cp1047 device.

       /usr/share/groff/1.22.2/tmac/tty.tmac
	      Macros for use with grotty.

       /usr/share/groff/1.22.2/tmac/tty-char.tmac
	      Additional klugdey character definitions for use with grotty.

       Note  that  on  EBCDIC  hosts,  only  files  for	 the  cp1047 device is
       installed.

BUGS
       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
       lines.

       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.

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

Groff Version 1.22.2	       07 February 2013			     GROTTY(1)
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