tic
tic(1) General Commands Manual tic(1)
NAME
tic - the terminfo entry-description compiler
SYNOPSIS
tic [-01CDGIKLNTUVWacfgqrstx] [-e names] [-o dir] [-Q[n]] [-R subset]
[-v[n]] [-w[n]] file
DESCRIPTION
The tic command translates a terminfo file from source format into com-
piled format. The compiled format is necessary for use with the li-
brary routines in ncurses(3NCURSES).
As described in term(5), the database may be either a directory tree
(one file per terminal entry) or a hashed database (one record per en-
try). The tic command writes only one type of entry, depending on how
it was built:
o For directory trees, the top-level directory, e.g., /usr/share/ter-
minfo, specifies the location of the database.
o For hashed databases, a filename is needed. If the given file is
not found by that name, but can be found by adding the suffix
".db", then that is used.
The default name for the hashed database is the same as the default
directory name (only adding a ".db" suffix).
In either case (directory or hashed database), tic will create the con-
tainer if it does not exist. For a directory, this would be the "ter-
minfo" leaf, versus a "terminfo.db" file.
The results are normally placed in the system terminfo database
/etc/terminfo. The compiled terminal description can be placed in a
different terminfo database. There are two ways to achieve this:
o First, you may override the system default either by using the -o
option, or by setting the variable TERMINFO in your shell environ-
ment to a valid database location.
o Secondly, if tic cannot write in /etc/terminfo or the location
specified using your TERMINFO variable, it looks for the directory
$HOME/.terminfo (or hashed database $HOME/.terminfo.db); if that
location exists, the entry is placed there.
Libraries that read terminfo entries are expected to check in succes-
sion
o a location specified with the TERMINFO environment variable,
o $HOME/.terminfo,
o directories listed in the TERMINFO_DIRS environment variable,
o a compiled-in list of directories (no default value), and
o the system terminfo database (/etc/terminfo).
ALIASES
This is the same program as infotocap and captoinfo; usually those are
linked to, or copied from this program:
o When invoked as infotocap, tic sets the -I option.
o When invoked as captoinfo, tic sets the -C option.
OPTIONS
-0 restricts the output to a single line
-1 restricts the output to a single column
-a tells tic to retain commented-out capabilities rather than dis-
carding them. Capabilities are commented by prefixing them with
a period. This sets the -x option, because it treats the com-
mented-out entries as user-defined names. If the source is
termcap, accept the 2-character names required by version 6.
Otherwise these are ignored.
-C Force source translation to termcap format. Note: this differs
from the -C option of infocmp(1) in that it does not merely
translate capability names, but also translates terminfo strings
to termcap format. Capabilities that are not translatable are
left in the entry under their terminfo names but commented out
with two preceding dots. The actual format used incorporates
some improvements for escaped characters from terminfo format.
For a stricter BSD-compatible translation, add the -K option.
If this is combined with -c, tic makes additional checks to re-
port cases where the terminfo values do not have an exact equiv-
alent in termcap form. For example:
o sgr usually will not convert, because termcap lacks the
ability to work with more than two parameters, and because
termcap lacks many of the arithmetic/logical operators used
in terminfo.
o capabilities with more than one delay or with delays before
the end of the string will not convert completely.
-c tells tic to only check file for errors, including syntax prob-
lems and bad use-links. If you specify -C (-I) with this op-
tion, the code will print warnings about entries which, after
use resolution, are more than 1023 (4096) bytes long. Due to a
fixed buffer length in older termcap libraries, as well as buggy
checking for the buffer length (and a documented limit in ter-
minfo), these entries may cause core dumps with other implemen-
tations.
tic checks string capabilities to ensure that those with parame-
ters will be valid expressions. It does this check only for the
predefined string capabilities; those which are defined with the
-x option are ignored.
-D tells tic to print the database locations that it knows about,
and exit. The first location shown is the one to which it would
write compiled terminal descriptions. If tic is not able to
find a writable database location according to the rules summa-
rized above, it will print a diagnostic and exit with an error
rather than printing a list of database locations.
-e names
Limit writes and translations to the following comma-separated
list of terminals. If any name or alias of a terminal matches
one of the names in the list, the entry will be written or
translated as normal. Otherwise no output will be generated for
it. The option value is interpreted as a file containing the
list if it contains a '/'. (Note: depending on how tic was com-
piled, this option may require -I or -C.)
-f Display complex terminfo strings which contain if/then/else/en-
dif expressions indented for readability.
-G Display constant literals in decimal form rather than their
character equivalents.
-g Display constant character literals in quoted form rather than
their decimal equivalents.
-I Force source translation to terminfo format.
-K Suppress some longstanding ncurses extensions to termcap format,
e.g., "\s" for space.
-L Force source translation to terminfo format using the long C
variable names listed in <term.h>
-N Disable smart defaults. Normally, when translating from termcap
to terminfo, the compiler makes a number of assumptions about
the defaults of string capabilities reset1_string, carriage_re-
turn, cursor_left, cursor_down, scroll_forward, tab, newline,
key_backspace, key_left, and key_down, then attempts to use ob-
solete termcap capabilities to deduce correct values. It also
normally suppresses output of obsolete termcap capabilities such
as bs. This option forces a more literal translation that also
preserves the obsolete capabilities.
-odir Write compiled entries to given database location. Overrides
the TERMINFO environment variable.
-Qn Rather than show source in terminfo (text) format, print the
compiled (binary) format in hexadecimal or base64 form, depend-
ing on the option's value:
1 hexadecimal
2 base64
3 hexadecimal and base64
-q Suppress comments and blank lines when showing translated
source.
-Rsubset
Restrict output to a given subset. This option is for use with
archaic versions of terminfo like those on SVr1, Ultrix, or
HP/UX that do not support the full set of SVR4/XSI Curses ter-
minfo; and outright broken ports like AIX 3.x that have their
own extensions incompatible with SVr4/XSI. Available subsets
are "SVr1", "Ultrix", "HP", "BSD" and "AIX"; see terminfo(5) for
details.
-r Force entry resolution (so there are no remaining tc capabili-
ties) even when doing translation to termcap format. This may
be needed if you are preparing a termcap file for a termcap li-
brary (such as GNU termcap through version 1.3 or BSD termcap
through 4.3BSD) that does not handle multiple tc capabilities
per entry.
-s Summarize the compile by showing the database location into
which entries are written, and the number of entries which are
compiled.
-T eliminates size-restrictions on the generated text. This is
mainly useful for testing and analysis, since the compiled de-
scriptions are limited (e.g., 1023 for termcap, 4096 for ter-
minfo).
-t tells tic to discard commented-out capabilities. Normally when
translating from terminfo to termcap, untranslatable capabili-
ties are commented-out.
-U tells tic to not post-process the data after parsing the source
file. Normally, it infers data which is commonly missing in older
terminfo data, or in termcaps.
-V reports the version of ncurses which was used in this program, and
exits.
-vn specifies that (verbose) output be written to standard error trace
information showing tic's progress.
The optional parameter n is a number from 1 to 10, inclusive, in-
dicating the desired level of detail of information. If ncurses
is built without tracing support, the optional parameter is ig-
nored. If n is omitted, the default level is 1. If n is speci-
fied and greater than 1, the level of detail is increased.
The debug flag levels are as follows:
1 Names of files created and linked
2 Information related to the "use" facility
3 Statistics from the hashing algorithm
5 String-table memory allocations
7 Entries into the string-table
8 List of tokens encountered by scanner
9 All values computed in construction of the hash table
If the debug level n is not given, it is taken to be one.
-W By itself, the -w option will not force long strings to be
wrapped. Use the -W option to do this.
If you specify both -f and -W options, the latter is ignored when
-f has already split the line.
-wn specifies the width of the output. The parameter is optional. If
it is omitted, it defaults to 60.
-x Treat unknown capabilities as user-defined (see user_caps(5)).
That is, if you supply a capability name which tic does not recog-
nize, it will infer its type (boolean, number or string) from the
syntax and make an extended table entry for that. User-defined
capability strings whose name begins with "k" are treated as func-
tion keys.
PARAMETERS
file contains one or more terminfo terminal descriptions in source
format [see terminfo(5)]. Each description in the file de-
scribes the capabilities of a particular terminal.
If file is "-", then the data is read from the standard input.
The file parameter may also be the path of a character-device.
PROCESSING
All but one of the capabilities recognized by tic are documented in
terminfo(5). The exception is the use capability.
When a use=entry-name field is discovered in a terminal entry currently
being compiled, tic reads in the binary from /etc/terminfo to complete
the entry. (Entries created from file will be used first. tic dupli-
cates the capabilities in entry-name for the current entry, with the
exception of those capabilities that explicitly are defined in the cur-
rent entry.
When an entry, e.g., entry_name_1, contains a use=entry_name_2 field,
any canceled capabilities in entry_name_2 must also appear in en-
try_name_1 before use= for these capabilities to be canceled in en-
try_name_1.
Total compiled entries cannot exceed 4096 bytes. The name field cannot
exceed 512 bytes. Terminal names exceeding the maximum alias length
(32 characters on systems with long filenames, 14 characters otherwise)
will be truncated to the maximum alias length and a warning message
will be printed.
HISTORY
System V Release 2 provided a tic utility. It accepted a single op-
tion: -v (optionally followed by a number). According to Ross Ridge's
comment in mytinfo, this version of tic was unable to represent can-
celled capabilities.
System V Release 3 provided a different tic utility, written by Pavel
Curtis, (originally named "compile" in pcurses). This added an option
-c to check the file for errors, with the caveat that errors in "use="
links would not be reported. System V Release 3 documented a few warn-
ing messages which did not appear in pcurses. While the program itself
was changed little as development continued with System V Release 4,
the table of capabilities grew from 180 (pcurses) to 464 (Solaris).
In early development of ncurses (1993), Zeyd Ben-Halim used the table
from mytinfo to extend the pcurses table to 469 capabilities (456
matched SVr4, 8 were only in SVr4, 13 were not in SVr4). Of those 13,
11 were ultimately discarded (perhaps to match the draft of X/Open
Curses). The exceptions were memory_lock_above and memory_unlock (see
user_caps(5)).
Eric Raymond incorporated parts of mytinfo into ncurses to implement
the termcap-to-terminfo source conversion, and extended that to begin
development of the corresponding terminfo-to-termcap source conversion,
Thomas Dickey completed that development over the course of several
years.
In 1999, Thomas Dickey added the -x option to support user-defined ca-
pabilities.
In 2010, Roy Marples provided a tic program and terminfo library for
NetBSD. That implementation adapts several features from ncurses, in-
cluding tic's -x option.
The -c option tells tic to check for problems in the terminfo source
file. Continued development provides additional checks:
o pcurses had 8 warnings
o ncurses in 1996 had 16 warnings
o Solaris (SVr4) curses has 28 warnings
o NetBSD tic in 2019 has 19 warnings.
o ncurses in 2019 has 96 warnings
The checking done in ncurses' tic helps with the conversion to termcap,
as well as pointing out errors and inconsistencies. It is also used to
ensure consistency with the user-defined capabilities. There are 527
distinct capabilities in ncurses' terminal database; 128 of those are
user-defined.
PORTABILITY
X/Open Curses, Issue 7 (2009) provides a brief description of tic. It
lists one option: -c. The omission of -v is unexpected. The change
history states that the description is derived from True64 UNIX. Ac-
cording to its manual pages, that system also supported the -v option.
Shortly after Issue 7 was released, Tru64 was discontinued. As of
2019, the surviving implementations of tic are SVr4 (AIX, HP-UX and So-
laris), ncurses and NetBSD curses. The SVr4 tic programs all support
the -v option. The NetBSD tic program follows X/Open's documentation,
omitting the -v option.
The X/Open rationale states that some implementations of tic read ter-
minal descriptions from the standard input if the file parameter is
omitted. None of these implementations do that. Further, it comments
that some may choose to read from "./terminfo.src" but that is obsoles-
cent behavior from SVr2, and is not (for example) a documented feature
of SVr3.
COMPATIBILITY
There is some evidence that historic tic implementations treated de-
scription fields with no whitespace in them as additional aliases or
short names. This tic does not do that, but it does warn when descrip-
tion fields may be treated that way and check them for dangerous char-
acters.
EXTENSIONS
Unlike the SVr4 tic command, this implementation can actually compile
termcap sources. In fact, entries in terminfo and termcap syntax can
be mixed in a single source file. See terminfo(5) for the list of
termcap names taken to be equivalent to terminfo names.
The SVr4 manual pages are not clear on the resolution rules for use ca-
pabilities. This implementation of tic will find use targets anywhere
in the source file, or anywhere in the file tree rooted at TERMINFO (if
TERMINFO is defined), or in the user's $HOME/.terminfo database (if it
exists), or (finally) anywhere in the system's file tree of compiled
entries.
The error messages from this tic have the same format as GNU C error
messages, and can be parsed by GNU Emacs's compile facility.
Aside from -c and -v, options are not portable:
o Most of tic's options are not supported by SVr4 tic:
-0 -1 -C -G -I -N -R -T -V -a -e -f -g -o -r -s -t -x
o The NetBSD tic supports a few of the ncurses options
-a -o -x
and adds -S (a feature which does the same thing as infocmp's -e
and -E options).
The SVr4 -c mode does not report bad "use=" links.
System V does not compile entries to or read entries from your
$HOME/.terminfo database unless TERMINFO is explicitly set to it.
FILES
/etc/terminfo/?/*
Compiled terminal description database.
SEE ALSO
infocmp(1), captoinfo(1), infotocap(1), toe(1), ncurses(3NCURSES),
term(5). terminfo(5). user_caps(5).
This describes ncurses version 6.2 (patch 20200212).
AUTHOR
Eric S. Raymond <esr@snark.thyrsus.com> and
Thomas E. Dickey <dickey@invisible-island.net>
tic(1)
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