144 lines
5.3 KiB
Groff
144 lines
5.3 KiB
Groff
.\"***************************************************************************
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.\" Copyright (c) 2008-2011,2013 Free Software Foundation, Inc. *
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.\" *
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.\" Permission is hereby granted, free of charge, to any person obtaining a *
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.\" copy of this software and associated documentation files (the *
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.\" "Software"), to deal in the Software without restriction, including *
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.\" without limitation the rights to use, copy, modify, merge, publish, *
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.\" distribute, distribute with modifications, sublicense, and/or sell *
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.\" copies of the Software, and to permit persons to whom the Software is *
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.\" furnished to do so, subject to the following conditions: *
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.\" *
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.\" The above copyright notice and this permission notice shall be included *
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.\" in all copies or substantial portions of the Software. *
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.\" *
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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.\" *
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.\" Except as contained in this notice, the name(s) of the above copyright *
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.\" holders shall not be used in advertising or otherwise to promote the *
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.\" sale, use or other dealings in this Software without prior written *
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.\" authorization. *
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.\"***************************************************************************
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.\"
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.\" $Id: tabs.1,v 1.11 2013/06/22 18:11:57 tom Exp $
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.TH @TABS@ 1 ""
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.ds n 5
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.SH NAME
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\fB@TABS@\fR \- set tabs on a terminal
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.SH SYNOPSIS
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\fB@TABS@\fR [\fIoptions\fR]] \fI[tabstop-list]\fR
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.SH DESCRIPTION
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.PP
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The \fB@TABS@\fP program clears and sets tab-stops on the terminal.
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This uses the terminfo \fIclear_all_tabs\fP and \fIset_tab\fP capabilities.
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If either is absent, \fB@TABS@\fP is unable to clear/set tab-stops.
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The terminal should be configured to use hard tabs, e.g.,
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.sp
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.RS
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stty tab0
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.RE
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.SH OPTIONS
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.SS General Options
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.TP 5
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.BI \-T "name"
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Tell \fB@TABS@\fP which terminal type to use.
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If this option is not given, \fB@TABS@\fP will use the \fB$TERM\fP
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environment variable.
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If that is not set, it will use the \fIansi+tabs\fP entry.
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.TP 5
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.B \-d
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The debugging option shows a ruler line, followed by two data lines.
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The first data line shows the expected tab-stops marked with asterisks.
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The second data line shows the actual tab-stops, marked with asterisks.
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.TP 5
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.B \-n
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This option tells \fB@TABS@\fP to check the options and run any debugging
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option, but not to modify the terminal settings.
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.TP
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\fB\-V\fR
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reports the version of ncurses which was used in this program, and exits.
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.PP
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The \fB@TABS@\fP program processes a single list of tab stops.
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The last option to be processed which defines a list is the one that
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determines the list to be processed.
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.SS Implicit Lists
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Use a single number as an option, e.g., "\fB\-5\fP" to set tabs at the given
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interval (in this case 1, 6, 11, 16, 21, etc.). Tabs are repeated up to
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the right margin of the screen.
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.PP
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Use "\fB\-0\fP" to clear all tabs.
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.PP
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Use "\fB\-8\fP" to set tabs to the standard interval.
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.SS Explicit Lists
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An explicit list can be defined after the options (this does not use a "\-").
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The values in the list must be in increasing numeric order, and greater than
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zero. They are separated by a comma or a blank, for example,
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.sp
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.RS
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tabs 1,6,11,16,21
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.br
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tabs 1 6 11 16 21
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.RE
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Use a '+' to treat a number as an increment relative to the previous value,
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e.g.,
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.sp
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.RS
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tabs 1,+5,+5,+5,+5
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.RE
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which is equivalent to the 1,6,11,16,21 example.
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.SS Predefined Tab-Stops
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X/Open defines several predefined lists of tab stops.
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.TP 5
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.B \-a
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Assembler, IBM S/370, first format
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.TP 5
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.B \-a2
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Assembler, IBM S/370, second format
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.TP 5
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.B \-c
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COBOL, normal format
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.TP 5
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.B \-c2
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COBOL compact format
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.TP 5
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.B \-c3
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COBOL compact format extended
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.TP 5
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.B \-f
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FORTRAN
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.TP 5
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.B \-p
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PL/I
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.TP 5
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.B \-s
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SNOBOL
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.TP 5
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.B \-u
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UNIVAC 1100 Assembler
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.SH PORTABILITY
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.PP
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X/Open describes a \fB+m\fP option, to set a terminal's left-margin.
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Very few of the entries in the terminal database provide this capability.
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.PP
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The \fB\-d\fP (debug) and \fB\-n\fP (no-op) options are extensions not provided
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by other implementations.
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.PP
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Documentation for other implementations states that there is a limit on the
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number of tab stops. While some terminals may not accept an arbitrary number
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of tab stops, this implementation will attempt to set tab stops up to the
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right margin of the screen, if the given list happens to be that long.
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.SH SEE ALSO
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\fB@TSET@\fR(1),
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\fB@INFOCMP@\fR(1M),
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\fBcurses\fR(3X),
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\fBterminfo\fR(\*n).
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.PP
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This describes \fBncurses\fR
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version @NCURSES_MAJOR@.@NCURSES_MINOR@ (patch @NCURSES_PATCH@).
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