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tic(1m) User commands tic(1m)
tic - compile terminal descriptions for terminfo or termcap
tic [-01acCDfgGIKLNqrstTUVWx] [-e terminal-type-list] [-o dir] [-Q[n]]
[-R subset] [-v[n]] [-w[n]] file
tic translates a terminfo file from source format into the compiled
format used by the ncurses(3x) library.
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
entry). The tic command writes only one type of entry, depending on
how it was built.
o For directory trees, the top-level directory, such as
/usr/share/terminfo, 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
container if it does not exist. For a directory, this would be the
"terminfo" leaf, versus a terminfo.db file.
The results are normally placed in the system terminfo database
/usr/share/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 the process
environment to a valid database location.
o Secondly, if tic cannot write in /usr/share/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
succession
o a location specified by the TERMINFO environment variable,
o $HOME/.terminfo,
o directories listed in the TERMINFO_DIRS environment variable,
o a compiled-in list of directories (/usr/share/terminfo), and
o the system terminfo database (/usr/share/terminfo).
Section "Fetching Compiled Descriptions" in terminfo(5) goes into
further detail.
tic 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.
-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
discarding them. Capabilities are commented by prefixing them
with a period. -a implies -x, because tic treats the commented-
out entries as user-defined names. If the source is in termcap
format, tic accepts the two-character names required by ncurses
ABI 6. Otherwise these are ignored.
-C Force source translation to termcap format. Note: this option
differs from the -C option of infocmp(1m) in that it does not
merely translate capability names, but also translates terminfo
string capability values to termcap format. tic leaves
capabilities that are not translatable 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, specify -K as well.
If -C is combined with -c, tic makes additional checks,
reporting cases where terminfo capability values do not have an
exact equivalent in termcap syntax. For example:
o sgr usually does not convert, because termcap is unable to
work with more than two parameters, and because termcap 's
language for encoding parameterized capabilities lacks many
of terminfo's arithmetic and logical operators.
-c tells tic to perform only validation of file , including syntax
problems and invalid "use" references; no output is produced.
If you specify -C (-I) with this option, tic warns about entries
that, after "use" resolution, exceed 1023 (4096) bytes. Due to
a fixed buffer length in older termcap libraries, as well as
buggy checking of the buffer length (and a documented limit in
terminfo), these entries may cause core dumps with other
implementations.
tic checks string capabilities to ensure that those with
parameters are valid expressions. It validates only standard
string capabilities, ignoring those defined with the -x option.
-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
summarized above, it will print a diagnostic and exit with an
error rather than printing a list of database locations.
-e list
Limit writes and translations to the comma-separated list of
terminal types. 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
compiled, this option may require -I or -C.)
-f Display complex terminfo strings which contain
if/then/else/endif 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_return, cursor_left, cursor_down, scroll_forward, tab,
newline, key_backspace, key_left, and key_down, then attempts to
use obsolete 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,
depending 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 terminfo;
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
capabilities) even when doing translation to termcap format.
This may be needed if you are preparing a termcap file for a
termcap library (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
descriptions are limited (e.g., 1023 for termcap, 4096 for
terminfo).
-t tells tic to discard commented-out capabilities. Normally when
translating from terminfo to termcap, untranslatable
capabilities 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 9, inclusive,
indicating the desired level of detail of information.
o If ncurses is built without tracing support, the optional
parameter is ignored.
o If n is omitted, the default level is 1.
o If n is specified and greater than 1, the level of detail is
increased, and the output is written (with tracing
information) to the "trace" file.
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
4 Details of extended capabilities
5 (unused)
6 (unused)
7 Entries into the string-table
8 List of tokens encountered by scanner
9 All values computed in construction of the hash table
-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
recognize, 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 function keys.
file contains one or more terminfo terminal descriptions in source
format; see terminfo(5). Each description in the file describes
the capabilities of a particular terminal type.
If file is "-", the data are read from the standard input
stream. The file parameter may also be the path of a character
device.
terminfo(5) documents all but one of the capabilities recognized by
tic. The exception is the use capability, which enables a terminal
type description to incorporate others by reference.
tic serially reads and compiles terminal type descriptions; at any
given time, the program compiles at most one current entry. When tic
encounters a use=entry-name field in the current entry, it reads the
compiled description of entry-name from /usr/share/terminfo to complete
the current entry. If tic has already compiled a description of entry-
name preceding the current entry in file, tic uses it preferentially.
tic duplicates the capabilities in entry-name for the current entry,
excepting those that the current entry explicitly defines. The
foregoing has implications for capability cancellation. When entry-1
declares "use=entry-2", any canceled capabilities in entry-2 must also
appear in entry-1 prior to "use=entry-2" for these capabilities to be
canceled in entry-1.
Compiled entries cannot exceed 4096 bytes in the legacy storage format,
or 32768 using the extended number format. 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.
/usr/share/terminfo
compiled terminal description database
There is some evidence that historic tic implementations treated
description fields with no whitespace in them as additional aliases or
short names. This tic does not do that, but it does warn when
description fields may be treated that way and check them for dangerous
characters.
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
capabilities. ncurses's tic finds use targets anywhere in the source
file, or anywhere in the file tree rooted at the location in the
TERMINFO environment variable (if TERMINFO is defined), or in the
user's $HOME/.terminfo database (if it exists), or (finally) anywhere
in the system's collection 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.
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 Tru64. According
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
Solaris), 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
terminal 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
obsolescent behavior from SVr2, and is not (for example) a documented
feature of SVr3.
System V Release 2 provided a tic utility. It accepted a single
option: -v (optionally followed by a number). According to Ross
Ridge's comment in mytinfo, this version of tic was unable to represent
canceled 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
warning 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
capabilities.
In 2010, Roy Marples provided a tic program and terminfo library for
NetBSD. That implementation adapts several features from ncurses,
including 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's 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's terminal database; 128
of those are user-defined.
Eric S. Raymond <esr@snark.thyrsus.com> and
Thomas E. Dickey <dickey@invisible-island.net>
captoinfo(1m), infocmp(1m), infotocap(1m), toe(1m), curses(3x),
term(5), terminfo(5), user_caps(5)
ncurses 6.5 2025-08-16 tic(1m)