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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | PORTABILITY | SEE ALSO | COLOPHON |
@TABS@(1) General Commands Manual @TABS@(1)
@TABS@ - set tabs on a terminal
@TABS@ [options]] [tabstop-list]
The @TABS@ program clears and sets tab-stops on the terminal. This
uses the terminfo clear_all_tabs and set_tab capabilities. If either
is absent, @TABS@ is unable to clear/set tab-stops. The terminal
should be configured to use hard tabs, e.g.,
stty tab0
Like @CLEAR@(1), @TABS@ writes to the standard output. You can
redirect the standard output to a file (which prevents @TABS@ from
actually changing the tabstops), and later cat the file to the
screen, setting tabstops at that point.
General Options
-Tname
Tell @TABS@ which terminal type to use. If this option is not
given, @TABS@ will use the $TERM environment variable. If that
is not set, it will use the ansi+tabs entry.
-d The debugging option shows a ruler line, followed by two data
lines. The first data line shows the expected tab-stops marked
with asterisks. The second data line shows the actual tab-
stops, marked with asterisks.
-n This option tells @TABS@ to check the options and run any
debugging option, but not to modify the terminal settings.
-V reports the version of ncurses which was used in this program,
and exits.
The @TABS@ program processes a single list of tab stops. The last
option to be processed which defines a list is the one that
determines the list to be processed.
Implicit Lists
Use a single number as an option, e.g., “-5” to set tabs at the given
interval (in this case 1, 6, 11, 16, 21, etc.). Tabs are repeated up
to the right margin of the screen.
Use “-0” to clear all tabs.
Use “-8” to set tabs to the standard interval.
Explicit Lists
An explicit list can be defined after the options (this does not use
a “-”). The values in the list must be in increasing numeric order,
and greater than zero. They are separated by a comma or a blank, for
example,
tabs 1,6,11,16,21
tabs 1 6 11 16 21
Use a “+” to treat a number as an increment relative to the previous
value, e.g.,
tabs 1,+5,+5,+5,+5
which is equivalent to the 1,6,11,16,21 example.
Predefined Tab-Stops
X/Open defines several predefined lists of tab stops.
-a Assembler, IBM S/370, first format
-a2 Assembler, IBM S/370, second format
-c COBOL, normal format
-c2 COBOL compact format
-c3 COBOL compact format extended
-f FORTRAN
-p PL/I
-s SNOBOL
-u UNIVAC 1100 Assembler
IEEE Std 1003.1/The Open Group Base Specifications Issue 7
(POSIX.1-2008) describes a tabs utility. However
· This standard describes a +m option, to set a terminal's left-
margin. Very few of the entries in the terminal database provide
this capability.
· There is no counterpart in X/Open Curses Issue 7 for this
utility, unlike @TPUT@(1).
The -d (debug) and -n (no-op) options are extensions not provided by
other implementations.
Documentation for other implementations states that there is a limit
on the number of tab stops. While some terminals may not accept an
arbitrary number of tab stops, this implementation will attempt to
set tab stops up to the right margin of the screen, if the given list
happens to be that long.
@TSET@(1), @INFOCMP@(1M), curses(3X), terminfo(5).
This describes ncurses version @NCURSES_MAJOR@.@NCURSES_MINOR@ (patch
@NCURSES_PATCH@).
This page is part of the ncurses (new curses) project. Information
about the project can be found at
⟨https://www.gnu.org/software/ncurses/ncurses.html⟩. If you have a
bug report for this manual page, send it to
bug-ncurses-request@gnu.org. This page was obtained from the
project's upstream Git mirror of the CVS repository
⟨git://ncurses.scripts.mit.edu/ncurses.git⟩ on 2017-07-05. If you
discover any rendering problems in this HTML version of the page, or
you believe there is a better or more up-to-date source for the page,
or you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
@TABS@(1)