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tabs(1) [netbsd man page]

TABS(1) 						    BSD General Commands Manual 						   TABS(1)

tabs -- set terminal tabs SYNOPSIS
tabs [-n|-a|-a2|-c|-c2|-c3|-f|-p|-s|-u] [+m[n]] [-T type] tabs [-T type] [+[n]] n1[,n2,...] DESCRIPTION
The tabs utility displays a series of characters that first clears the hardware terminal tab settings and then initializes the tab stops at the specified positions and optionally adjusts the margin. The phrase "tab-stop position N" means that, from the start of a line of output, tabbing to position N shall cause the next character output to be in the (N+1)th column on that line. The following options are supported: -n Specifies repetitive tab stops separated by a uniform number of columns, n, where n is a single digit decimal number. The default usage of tabs with no arguments is equivalent to tabs -8. When -0 is used, the tab stops are cleared and no new ones set. -a Assembler, applicable to some mainframes. Equivalent to tabs 1,10,16,36,72 . -a2 Assembler, applicable to some mainframes. Equivalent to tabs 1,10,16,40,72 -c COBOL, normal format. Equivalent to tabs 1,8,12,16,20,55 -c2 COBOL, compact format (columns 1 to 6 omitted). Equivalent to tabs 1,6,10,14,49 -c3 COBOL, compact format (columns 1 to 6 omitted), with more tabs than -c2. Equivalent to tabs 1,6,10,14,18,22,26,30,34,38,42,46,50,54,58,62,67 -f FORTRAN. Equivalent to tabs 1,7,11,15,19,23 -p PL/1. Equivalent to tabs 1,5,9,13,17,21,25,29,33,37,41,45,49,53,57,61 -s SNOBOL. Equivalent to tabs 1,10,55 -T type Indicates the type of terminal. -u Assembler, applicable to some mainframes. Equivalent to tabs 1,12,20,44 EXIT STATUS
The tabs utility exits 0 on success, and >0 if an error occurs. ENVIRONMENT
The COLUMNS and TERM environment variables affect the execution of tabs as described in environ(7). The -T option overrides TERM. If neither TERM nor the -T option are present, tabs will fail. SEE ALSO
expand(1), stty(1), tput(1), unexpand(1), termcap(5) STANDARDS
The tabs utility conforms to IEEE Std 1003.1 (``POSIX.1''). HISTORY
A tabs utility first appeared in PWB UNIX. This implementation was introduced in NetBSD 6.0. AUTHORS
Roy Marples <> BUGS
The current termcap(5) database does not define the set left soft margin 'ML' capability for any terminals. BSD
December 9, 2008 BSD

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tabs(1) 						      General Commands Manual							   tabs(1)

tabs - set tabs on a terminal SYNOPSIS
tabs [options]] [tabstop-list] DESCRIPTION
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
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
IEEE Std 1003.1/The Open Group Base Specifications Issue 7 (POSIX.1-2008) describes a tabs utility. However o 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. o 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
tset(1), infocmp(1), ncurses(3NCURSES), terminfo(5). This describes ncurses version 6.1 (patch 20180127). tabs(1)
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