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       grotty - groff driver for typewriter-like devices


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

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


       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
       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  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.
       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.
       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
       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
       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.


       -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 \Dl...’
              commands that have at least one zero argument (and so are either
              horizontal  or  vertical)  using  -,  |, and + characters.  In a
              similar way, grotty  handles  \Dp...’  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,
              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

       -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.


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

       \Xtty: 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.

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


              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  is


       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)
       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.


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