grotty - groff driver for typewriter-like devices . .


grotty [

-bBcdfhioruUv ] [ -F dir ] [ files  . . . ]

It is possible to have whitespace between the

-F option and its parameter. . .



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

R -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 \f[BI]at the same time\f[] (by using the BI font). .

The following colors are defined in

R 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 below). .

For SGR support, it is necessary to use the

-R option of

R less (1) to disable the interpretation of

R grotty 's old output format. Consequently, all programs which use

less as the pager program have to pass this option to it. For

R man (1) in particular, either add

-R to the

$PAGER environment variable, e.g. .


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

R man (1) versions, you have to use the

$MANPAGER environment variable instead. .

R grotty 's old output format can be displayed on a terminal by piping through

R ul (1). Pagers such as

R more (1) or

R less (1) are also able to display these sequences. Use either

-B or

-U when piping into

R less (1); use

-b when piping into

R more (1). There is no need to filter the output through

R 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

\[rs]N escape sequence in

R troff . . .




    Suppress the use of overstriking for bold characters. Ignored if

-c isn't used. .


    Use only overstriking for bold-italic characters. Ignored if

-c isn't used. .



R grotty 's old output format (see above). This also disables color output. .


    Ignore all

\[rs]D commands. Without this

grotty renders

\[rs]D'l . . .' commands that have at least one zero argument (and so are either horizontal or vertical) using

R - ,

R | , and

+ characters. In a similar way,

grotty handles

\[rs]D'p . . .' commands which consist entirely of horizontal and vertical lines. . .


    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. .

  • -F dir
        Prepend directory .IB dir /dev name to the search path for font and device description files; name is the name of the device, usually

R ascii ,

R latin1 ,

R utf8 , or

R cp1047 . .


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


    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. .


    Suppress overstriking (other than for bold or underlined characters in case the old output format has been activated with

R -c ). .


    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. .


    Suppress the use of underlining for italic characters. Ignored if

-c isn't used. .


    Use only underlining for bold-italic characters. Ignored if

-c isn't used. .


    Print the version number. . .



grotty understands a single X command produced using the

\[rs]X escape sequence. .

  • \[rs]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. . .



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

  •     .B GROFF_FONT_PATH A list of directories in which to search for the dev name directory in addition to the default ones. . See

R troff (1) and

R groff_font (5) for more details. . .




    Device description file for

ascii device. .

  • /usr/share/groff/1.20.1/font/devascii/ F
        Font description file for font F of

ascii device. .


    Device description file for

latin1 device. .

  • /usr/share/groff/1.20.1/font/devlatin1/ F
        Font description file for font F of

latin1 device. .


    Device description file for

utf8 device. .

  • /usr/share/groff/1.20.1/font/devutf8/ F
        Font description file for font F of

utf8 device. .


    Device description file for

cp1047 device. .

  • /usr/share/groff/1.20.1/font/devcp1047/ F
        Font description file for font F of

cp1047 device. .


    Macros for use with

R grotty . .


    Additional klugdey character definitions for use with

R grotty . .

Note that on EBCDIC hosts, only files for the

cp1047 device is installed. . .



grotty is intended only for simple documents. .

There is no support for fractional horizontal or vertical motions. .

There is no support for

\[rs]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

R grops (1).

\[rs]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. . .



R groff (1),

R troff (1),

R groff_out (5),

R groff_font (5),

R groff_char (7),

R ul (1),

R more (1),

R man (1),

R less (1) . .cp \n[grotty_C] .