1GROTTY(1) General Commands Manual GROTTY(1)
2
6 grotty - groff driver for typewriter-like devices
7
9 grotty [ -bBcdfhiouUv ] [ -Fdir ] [ files... ]
10 It is possible to have whitespace between the -F option and its parame‐
12 ter.
13
15 grotty translates the output of GNU troff into a form suitable for
16 typewriter-like devices. Normally grotty should be invoked by using
17 the groff command with a -Tascii, -Tascii8, -Tlatin1, -Tnippon or
18 -Tutf8 option on ASCII based systems, and with -Tcp1047 and -Tutf8 on
19 EBCDIC based hosts. If no files are given, grotty will read the stan‐
20 dard input. A filename of - will also cause grotty to read the stan‐
21 dard input. Output is written to the standard output.
22 By default, grotty emits SGR escape sequences (from ISO 6429, also
24 called ANSI color escapes) to change text attributes (bold, italic,
25 colors). This makes it possible to have eight different background and
26 foreground colors; additionally, bold and italic attributes can be used
27 at the same time (by using the BI font).
28 The following colors are defined in tty.tmac: black, white, red, green,
30 blue, yellow, magenta, cyan. Unknown colors are mapped to the default
31 color (which is dependent on the settings of the terminal; in most
32 cases, this is black for the foreground and white for the background).
33 Use the -c switch to revert to the old behaviour, printing a bold char‐
35 acter c with the sequence `c BACKSPACE c' and an italic character c by
36 the sequence `_ BACKSPACE c'. At the same time, color output is dis‐
37 abled. The same effect can be achieved by setting either the
38 GROFF_NO_SGR environment variable or using the `sgr' X command (see
39 below).
40 For SGR support, it is necessary to use the -R option of less(1) to
42 disable the interpretation of grotty's old output format. Conse‐
43 quently, all programs which use less as the pager program have to pass
44 this option to it. For man(1) in particular, either add -R to the
45 $PAGER environment variable, e.g.
46 PAGER="/usr/bin/less -R"
48 export PAGER
49 or use the -P option of man to set the pager executable and its
51 options, or modify the configuration file of man in a similar fashion.
52 grotty's old output format can be displayed on a terminal by piping
54 through ul(1). Pagers such as more(1) or less(1) are also able to dis‐
55 play these sequences. Use either -B or -U when piping into less(1);
56 use -b when piping into more(1). There is no need to filter the output
57 through col(1) since grotty never outputs reverse line feeds.
58 The font description file may contain a command
60 internalname n
62 where n is a decimal integer. If the 01 bit in n is set, then the font
64 will be treated as an italic font; if the 02 bit is set, then it will
65 be treated as a bold font. The code field in the font description
66 field gives the code which will be used to output the character. This
67 code can also be used in the \N escape sequence in troff.
68
70 -b Suppress the use of overstriking for bold characters. Ignored
71 if -c isn't used.
72 -B Use only overstriking for bold-italic characters. Ignored if -c
74 isn't used.
75 -c Use grotty's old output format (see above). This also disables
77 color output.
78 -d Ignore all \D commands. Without this grotty will render
80 \D'l...' commands that have at least one zero argument (and so
81 are either horizontal or vertical) using -, |, and + characters.
82 -f Use form feeds in the output. A form feed will be output at the
84 end of each page that has no output on its last line.
85 -Fdir Prepend directory dir/devname to the search path for font and
87 device description files; name is the name of the device, usu‐
88 ally ascii, ascii8, latin1, utf8, nippon or cp1047.
89 -h Use horizontal tabs in the output. Tabs are assumed to be set
91 every 8 columns.
92 -i Use escape sequences to set the italic text attribute instead of
94 the underline attribute for italic fonts (`I' and `BI'). Note
95 that most terminals (including xterm) don't support this.
96 Ignored if -c is active.
97 -o Suppress overstriking (other than for bold or underlined charac‐
99 ters in case the old output format has been activated with -c).
100 -u Suppress the use of underlining for italic characters. Ignored
102 if -c isn't used.
103 -U Use only underlining for bold-italic characters. Ignored if -c
105 isn't used.
106 -v Print the version number.
108
110 grotty understands a single X command produced using the \X escape
111 sequence.
112 \X'tty: sgr n'
114 If n is non-zero or missing, enable SGR output (this is the
115 default), otherwise use the old drawing scheme for bold and
116 underline.
117
119 GROFF_NO_SGR
120 If set, the old drawing scheme for bold and underline (using the
121 backspace character) is active. Colors are disabled.
122
124 /usr/share/groff/1.18.1.4/font/devascii/DESC
125 Device description file for ascii device.
126 /usr/share/groff/1.18.1.4/font/devascii/F
128 Font description file for font F of ascii device.
129 /usr/share/groff/1.18.1.4/font/devascii8/DESC
131 Device description file for ascii8 device.
132 /usr/share/groff/1.18.1.4/font/devlatin1/DESC
134 Device description file for latin1 device.
135 /usr/share/groff/1.18.1.4/font/devnippon/DESC
137 Device description file for nippon device.
138 /usr/share/groff/1.18.1.4/font/devlatin1/F
140 Font description file for font F of latin1 device.
141 /usr/share/groff/1.18.1.4/font/devutf8/DESC
143 Device description file for utf8 device.
144 /usr/share/groff/1.18.1.4/font/devutf8/F
146 Font description file for font F of utf8 device.
147 /usr/share/groff/1.18.1.4/font/devcp1047/DESC
149 Device description file for cp1047 device.
150 /usr/share/groff/1.18.1.4/font/devcp1047/F
152 Font description file for font F of cp1047 device.
153 /usr/share/groff/1.18.1.4/tmac/tty.tmac
155 Macros for use with grotty.
156 /usr/share/groff/1.18.1.4/tmac/tty-char.tmac
158 Additional klugdey character definitions for use with grotty.
159 Note that on EBCDIC hosts, only files for the cp1047 device will be
161 installed.
162
164 grotty is intended only for simple documents.
165 There is no support for fractional horizontal or vertical motions.
167 There is no support for \D commands other than horizontal and vertical
169 lines.
170 Characters above the first line (ie with a vertical position of 0) can‐
172 not be printed.
173 Color handling is different compared to grops(1). \M doesn't set the
175 fill color for closed graphic objects (which grotty doesn't support
176 anyway) but changes the background color of the character cell, affect‐
177 ing all subsequent operations.
178
180 groff(1), troff(1), groff_out(5), groff_font(5), groff_char(7), ul(1),
181 more(1), man(1), less(1)
182Groff Version 1.18.1.4 25 January 2008 GROTTY(1)