mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-02 08:42:48 +00:00
209 lines
9.1 KiB
Groff
209 lines
9.1 KiB
Groff
.\"***************************************************************************
|
|
.\" Copyright (c) 1998,2002 Free Software Foundation, Inc. *
|
|
.\" *
|
|
.\" Permission is hereby granted, free of charge, to any person obtaining a *
|
|
.\" copy of this software and associated documentation files (the *
|
|
.\" "Software"), to deal in the Software without restriction, including *
|
|
.\" without limitation the rights to use, copy, modify, merge, publish, *
|
|
.\" distribute, distribute with modifications, sublicense, and/or sell *
|
|
.\" copies of the Software, and to permit persons to whom the Software is *
|
|
.\" furnished to do so, subject to the following conditions: *
|
|
.\" *
|
|
.\" The above copyright notice and this permission notice shall be included *
|
|
.\" in all copies or substantial portions of the Software. *
|
|
.\" *
|
|
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
|
|
.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
|
|
.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
|
|
.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
|
|
.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
|
|
.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
|
|
.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
|
|
.\" *
|
|
.\" Except as contained in this notice, the name(s) of the above copyright *
|
|
.\" holders shall not be used in advertising or otherwise to promote the *
|
|
.\" sale, use or other dealings in this Software without prior written *
|
|
.\" authorization. *
|
|
.\"***************************************************************************
|
|
.\"
|
|
.\" $Id: term.5,v 1.13 2002/04/20 16:49:17 tom Exp $
|
|
.TH TERM 5
|
|
.ds n 5
|
|
.ds d @TERMINFO@
|
|
.SH NAME
|
|
term \- format of compiled term file.
|
|
.SH SYNOPSIS
|
|
.B term
|
|
.SH DESCRIPTION
|
|
.PP
|
|
Compiled terminfo descriptions are placed under the directory \fB\*d\fP.
|
|
In order to avoid a linear search of a huge \s-1UNIX\s+1 system directory, a
|
|
two-level scheme is used: \fB\*b/c/name\fP
|
|
where
|
|
.I name
|
|
is the name of the terminal, and
|
|
.I c
|
|
is the first character of
|
|
.IR name .
|
|
Thus,
|
|
.I act4
|
|
can be found in the file \fB\*d/a/act4\fP.
|
|
Synonyms for the same terminal are implemented by multiple
|
|
links to the same compiled file.
|
|
.PP
|
|
The format has been chosen so that it will be the same on all hardware.
|
|
An 8 or more bit byte is assumed, but no assumptions about byte ordering
|
|
or sign extension are made.
|
|
.PP
|
|
The compiled file is created with the
|
|
.I tic
|
|
program, and read by the routine
|
|
.IR setupterm .
|
|
The file is divided into six parts:
|
|
the header,
|
|
terminal names,
|
|
boolean flags,
|
|
numbers,
|
|
strings,
|
|
and
|
|
string table.
|
|
.PP
|
|
The header section begins the file.
|
|
This section contains six short integers in the format
|
|
described below.
|
|
These integers are
|
|
(1) the magic number (octal 0432);
|
|
(2) the size, in bytes, of the names section;
|
|
(3) the number of bytes in the boolean section;
|
|
(4) the number of short integers in the numbers section;
|
|
(5) the number of offsets (short integers) in the strings section;
|
|
(6) the size, in bytes, of the string table.
|
|
.PP
|
|
Short integers are stored in two 8-bit bytes.
|
|
The first byte contains the least significant 8 bits of the value,
|
|
and the second byte contains the most significant 8 bits.
|
|
(Thus, the value represented is 256*second+first.)
|
|
The value \-1 is represented by the two bytes 0377, 0377; other negative
|
|
values are illegal. This value generally
|
|
means that the corresponding capability is missing from this terminal.
|
|
Note that this format corresponds to the hardware of the \s-1VAX\s+1
|
|
and \s-1PDP\s+1-11 (that is, little-endian machines).
|
|
Machines where this does not correspond to the hardware must read the
|
|
integers as two bytes and compute the little-endian value.
|
|
.PP
|
|
The terminal names section comes next.
|
|
It contains the first line of the terminfo description,
|
|
listing the various names for the terminal,
|
|
separated by the `|' character.
|
|
The section is terminated with an \s-1ASCII NUL\s+1 character.
|
|
.PP
|
|
The boolean flags have one byte for each flag.
|
|
This byte is either 0 or 1 as the flag is present or absent.
|
|
The capabilities are in the same order as the file <term.h>.
|
|
.PP
|
|
Between the boolean section and the number section,
|
|
a null byte will be inserted, if necessary,
|
|
to ensure that the number section begins on an even byte (this is a
|
|
relic of the PDP-11's word-addressed architecture, originally
|
|
designed in to avoid IOT traps induced by addressing a word on an
|
|
odd byte boundary).
|
|
All short integers are aligned on a short word boundary.
|
|
.PP
|
|
The numbers section is similar to the flags section.
|
|
Each capability takes up two bytes,
|
|
and is stored as a little-endian short integer.
|
|
If the value represented is \-1, the capability is taken to be missing.
|
|
.PP
|
|
The strings section is also similar.
|
|
Each capability is stored as a short integer, in the format above.
|
|
A value of \-1 means the capability is missing.
|
|
Otherwise, the value is taken as an offset from the beginning
|
|
of the string table.
|
|
Special characters in ^X or \ec notation are stored in their
|
|
interpreted form, not the printing representation.
|
|
Padding information $<nn> and parameter information %x are
|
|
stored intact in uninterpreted form.
|
|
.PP
|
|
The final section is the string table.
|
|
It contains all the values of string capabilities referenced in
|
|
the string section.
|
|
Each string is null terminated.
|
|
.PP
|
|
Note that it is possible for
|
|
.I setupterm
|
|
to expect a different set of capabilities
|
|
than are actually present in the file.
|
|
Either the database may have been updated since
|
|
.I setupterm
|
|
has been recompiled
|
|
(resulting in extra unrecognized entries in the file)
|
|
or the program may have been recompiled more recently
|
|
than the database was updated
|
|
(resulting in missing entries).
|
|
The routine
|
|
.I setupterm
|
|
must be prepared for both possibilities \-
|
|
this is why the numbers and sizes are included.
|
|
Also, new capabilities must always be added at the end of the lists
|
|
of boolean, number, and string capabilities.
|
|
.PP
|
|
Despite the consistent use of little-endian for numbers and the otherwise
|
|
self-describing format, it is not wise to count on portability of binary
|
|
terminfo entries between commercial UNIX versions. The problem is that there
|
|
are at least three versions of terminfo (under HP-UX, AIX, and OSF/1) which
|
|
diverged from System V terminfo after SVr1, and have added extension
|
|
capabilities to the string table that (in the binary format) collide with
|
|
System V and XSI Curses extensions. See \fBterminfo\fR(\*n) for detailed
|
|
discussion of terminfo source compatibility issues.
|
|
.PP
|
|
As an example, here is a hex dump of the description for the Lear-Siegler
|
|
ADM-3, a popular though rather stupid early terminal:
|
|
.nf
|
|
.sp
|
|
adm3a|lsi adm3a,
|
|
am,
|
|
cols#80, lines#24,
|
|
bel=^G, clear=\032$<1>, cr=^M, cub1=^H, cud1=^J,
|
|
cuf1=^L, cup=\\E=%p1%{32}%+%c%p2%{32}%+%c, cuu1=^K,
|
|
home=^^, ind=^J,
|
|
.sp
|
|
.ft CW
|
|
\s-20000 1a 01 10 00 02 00 03 00 82 00 31 00 61 64 6d 33 ........ ..1.adm3
|
|
0010 61 7c 6c 73 69 20 61 64 6d 33 61 00 00 01 50 00 a|lsi ad m3a...P.
|
|
0020 ff ff 18 00 ff ff 00 00 02 00 ff ff ff ff 04 00 ........ ........
|
|
0030 ff ff ff ff ff ff ff ff 0a 00 25 00 27 00 ff ff ........ ..%.'...
|
|
0040 29 00 ff ff ff ff 2b 00 ff ff 2d 00 ff ff ff ff ).....+. ..-.....
|
|
0050 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ........ ........
|
|
0060 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ........ ........
|
|
0070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ........ ........
|
|
0080 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ........ ........
|
|
0090 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ........ ........
|
|
00a0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ........ ........
|
|
00b0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ........ ........
|
|
00c0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ........ ........
|
|
00d0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ........ ........
|
|
00e0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ........ ........
|
|
00f0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ........ ........
|
|
0100 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ........ ........
|
|
0110 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ........ ........
|
|
0120 ff ff ff ff ff ff 2f 00 07 00 0d 00 1a 24 3c 31 ....../. .....$<1
|
|
0130 3e 00 1b 3d 25 70 31 25 7b 33 32 7d 25 2b 25 63 >..=%p1% {32}%+%c
|
|
0140 25 70 32 25 7b 33 32 7d 25 2b 25 63 00 0a 00 1e %p2%{32} %+%c....
|
|
0150 00 08 00 0c 00 0b 00 0a 00 ........ .\s+2
|
|
.ft R
|
|
.fi
|
|
.sp
|
|
.PP
|
|
Some limitations: total compiled entries cannot exceed 4096 bytes.
|
|
The name field cannot exceed 128 bytes.
|
|
.SH FILES
|
|
\*d/*/* compiled terminal capability data base
|
|
.SH SEE ALSO
|
|
\fBcurses\fR(3X), \fBterminfo\fR(\*n).
|
|
.\"#
|
|
.\"# The following sets edit modes for GNU EMACS
|
|
.\"# Local Variables:
|
|
.\"# mode:nroff
|
|
.\"# fill-column:79
|
|
.\"# End:
|