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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | USAGE | ENVIRONMENT | FILES | BUGS | SEE ALSO | COPYING | COLOPHON |
GROTTY(1) General Commands Manual GROTTY(1)
grotty - groff driver for typewriter-like devices
grotty [ -bBcdfhioruUv ] [ -Fdir ] [ 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 -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
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. 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.
If the DESC file contains the keyword unicode, grotty emits Unicode
characters in UTF-8 encoding. Otherwise, it emits characters in a
single-byte encoding depending on the data in the font description
files. See the groff_font(5) man page for more details.
-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 similar 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,
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.
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.
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
directory in addition to the default ones. See troff(1) and
groff_font(5) for more details.
/usr/local/share/groff/1.22.3/font/devascii/DESC
Device description file for ascii device.
/usr/local/share/groff/1.22.3/font/devascii/F
Font description file for font F of ascii device.
/usr/local/share/groff/1.22.3/font/devlatin1/DESC
Device description file for latin1 device.
/usr/local/share/groff/1.22.3/font/devlatin1/F
Font description file for font F of latin1 device.
/usr/local/share/groff/1.22.3/font/devutf8/DESC
Device description file for utf8 device.
/usr/local/share/groff/1.22.3/font/devutf8/F
Font description file for font F of utf8 device.
/usr/local/share/groff/1.22.3/font/devcp1047/DESC
Device description file for cp1047 device.
/usr/local/share/groff/1.22.3/font/devcp1047/F
Font description file for font F of cp1047 device.
/usr/local/share/groff/1.22.3/tmac/tty.tmac
Macros for use with grotty.
/usr/local/share/groff/1.22.3/tmac/tty-char.tmac
Additional kludgy character definitions for use with 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 \D commands other than horizontal and
vertical lines.
Characters above the first line (i.e. 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)
Copyright © 1989-2014 Free Software Foundation, Inc.
Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.
Permission is granted to copy and distribute modified versions of
this manual under the conditions for verbatim copying, provided that
the entire resulting derived work is distributed under the terms of a
permission notice identical to this one.
Permission is granted to copy and distribute translations of this
manual into another language, under the above conditions for modified
versions, except that this permission notice may be included in
translations approved by the Free Software Foundation instead of in
the original English.
This page is part of the groff (GNU troff) project. Information
about the project can be found at
⟨http://www.gnu.org/software/groff/⟩. If you have a bug report for
this manual page, see ⟨http://www.gnu.org/software/groff/⟩. This
page was obtained from the tarball groff-1.22.3.tar.gz fetched from
⟨ftp://ftp.gnu.org/gnu/groff/⟩ on 2017-07-05. If you discover any
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corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
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Groff Version 1.22.3 4 November 2014 GROTTY(1)
Pages that refer to this page: groff(1), nroff(1), groff_out(5)