# tabs 1

    tabs(1)                                                         tabs(1)

## NAME

           tabs - set tabs on a terminal

## SYNOPSIS

           tabs [-v[n]] [-ahuUV] file...

## DESCRIPTION

           The  tabs  program clears and sets tab-stops on the termi-
           nal.  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

## OPTIONS

       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.

           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

           X/Open  describes  a  +m option, to set a terminal's left-
           margin.  Very few of the entries in the terminal  database
           provide this capability.

           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 termi-
           nals 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

           tset(1), infocmp(1m), curses(3x), terminfo(5).

           This describes ncurses version 5.9 (patch 20110404).

                                                                    tabs(1)