NAME | SYNOPSIS | DESCRIPTION | OPTIONS | PORTABILITY | SEE ALSO | COLOPHON

@TABS@(1)                  General Commands Manual                 @TABS@(1)

NAME         top

       @TABS@ - set tabs on a terminal

SYNOPSIS         top

       @TABS@ [options]] [tabstop-list]

DESCRIPTION         top

       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.

OPTIONS         top

   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

PORTABILITY         top

       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.

SEE ALSO         top

       @TSET@(1), @INFOCMP@(1M), curses(3X), terminfo(5).

       This describes ncurses version @NCURSES_MAJOR@.@NCURSES_MINOR@ (patch
       @NCURSES_PATCH@).

COLOPHON         top

       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 2017-05-03.  If you
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       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)