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GROTTY(1)                                                            GROTTY(1)



NAME
       grotty - groff driver for typewriter-like devices

SYNOPSIS
       grotty [ -bBcdfhiouUv ] [ -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, -Tascii8, -Tlatin1, -Tnippon 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 character c with the sequence 'c BACKSPACE c'
       and an italic character c by the sequence '_ BACKSPACE c'.  At the same time, color output  is  disabled.   The
       same  effect  can be achieved by setting either the GROFF_NO_SGR environment variable or using the 'sgr' X com-
       mand (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, ascii8, latin1, utf8, nippon 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).

       -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/1.18.1.4/font/devascii/DESC
              Device description file for ascii device.

       /usr/share/groff/1.18.1.4/font/devascii/F
              Font description file for font F of ascii device.

       /usr/share/groff/1.18.1.4/font/devascii8/DESC
              Device description file for ascii8 device.

       /usr/share/groff/1.18.1.4/font/devlatin1/DESC
              Device description file for latin1 device.

       /usr/share/groff/1.18.1.4/font/devnippon/DESC
              Device description file for nippon device.

       /usr/share/groff/1.18.1.4/font/devlatin1/F
              Font description file for font F of latin1 device.

       /usr/share/groff/1.18.1.4/font/devutf8/DESC
              Device description file for utf8 device.

       /usr/share/groff/1.18.1.4/font/devutf8/F
              Font description file for font F of utf8 device.

       /usr/share/groff/1.18.1.4/font/devcp1047/DESC
              Device description file for cp1047 device.

       /usr/share/groff/1.18.1.4/font/devcp1047/F
              Font description file for font F of cp1047 device.

       /usr/share/groff/1.18.1.4/tmac/tty.tmac
              Macros for use with grotty.

       /usr/share/groff/1.18.1.4/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 1.18.1.4         11 November 2010                      GROTTY(1)