grotty - Unix, Linux Command
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 [green]background[]
and [red]foreground[] colors; additionally, bold and italic
attributes can be used BI]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
grottys 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.
grottys 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
Tag | Description |
|
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
[rs]N escape sequence in
troff. OPTIONS
Tag | Description |
-b |
Suppress the use of overstriking for bold characters.
Ignored if
-c isnt used.
|
-B |
Use only overstriking for bold-italic characters.
Ignored if
-c isnt used.
|
-c |
Use
grottys old output format (see above).
This also disables color output.
|
-d |
Ignore all
[rs]D commands.
Without this
grotty will render
[rs]Dl... 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) dont 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 isnt used.
|
-U |
Use only underlining for bold-italic characters.
Ignored if
-c isnt used.
|
-v |
Print the version number.
|
USAGE
grotty understands a single X command produced using the
[rs]X escape sequence.
Tag | Description |
[rs]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 underline.
|
ENVIRONMENT
Tag | Description |
GROFF_NO_SGR | |
If set, the old drawing scheme for bold and underline (using the
backspace character) is active.
Colors are disabled.
|
FILES
Tag | Description |
/usr/share/groff/1.18.1.1/font/devascii/DESC | |
Device description file for
ascii device.
|
/usr/share/groff/1.18.1.1/font/devascii/F | |
Font description file for font
F of
ascii device.
|
/usr/share/groff/1.18.1.1/font/devascii8/DESC | |
Device description file for
ascii8 device.
|
/usr/share/groff/1.18.1.1/font/devlatin1/DESC | |
Device description file for
latin1 device.
|
/usr/share/groff/1.18.1.1/font/devnippon/DESC | |
Device description file for
nippon device.
|
/usr/share/groff/1.18.1.1/font/devlatin1/F | |
Font description file for font
F of
latin1 device.
|
/usr/share/groff/1.18.1.1/font/devutf8/DESC | |
Device description file for
utf8 device.
|
/usr/share/groff/1.18.1.1/font/devutf8/F | |
Font description file for font
F of
utf8 device.
|
/usr/share/groff/1.18.1.1/font/devcp1047/DESC | |
Device description file for
cp1047 device.
|
/usr/share/groff/1.18.1.1/font/devcp1047/F | |
Font description file for font
F of
cp1047 device.
|
/usr/share/groff/1.18.1.1/tmac/tty.tmac | |
Macros for use with
grotty. |
/usr/share/groff/1.18.1.1/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
[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
grops(1).
[rs]M doesnt set the fill color for closed graphic objects (which
grotty doesnt support anyway) but changes the background color of the character
cell, affecting all subsequent operations.
SEE ALSO
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