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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 parameter.

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 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  back-ground background
       ground  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 character c with  the  sequence  `c
       BACKSPACE c' and an italic character c by the sequence `_ BACKSPACE c'.  At the same time, color out-put output
       put is disabled.  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.  Consequently, 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 display 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.

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 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, usually 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 characters 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.

FILES
       /usr/share/groff/1.19.2/font/devascii/DESC
              Device description file for ascii device.

       /usr/share/groff/1.19.2/font/devascii/F
              Font description file for font F of ascii device.

       /usr/share/groff/1.19.2/font/devlatin1/DESC
              Device description file for latin1 device.

       /usr/share/groff/1.19.2/font/devlatin1/F
              Font description file for font F of latin1 device.

       /usr/share/groff/1.19.2/font/devutf8/DESC
              Device description file for utf8 device.

       /usr/share/groff/1.19.2/font/devutf8/F
              Font description file for font F of utf8 device.

       /usr/share/groff/1.19.2/font/devcp1047/DESC
              Device description file for cp1047 device.

       /usr/share/groff/1.19.2/font/devcp1047/F
              Font description file for font F of cp1047 device.

       /usr/share/groff/1.19.2/tmac/tty.tmac
              Macros for use with grotty.

       /usr/share/groff/1.19.2/tmac/tty-char.tmac
              Additional klugdey character definitions for use with grotty.

       Note that on EBCDIC hosts, only files for the cp1047 device will be 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) cannot 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,
       affecting 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 1.19.2                            18 July 2003                                       GROTTY(1)