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+.\" $NetBSD: tabs.1,v 1.6 2014/03/18 18:20:45 riastradh Exp $
+.\"
+.\" Copyright (c) 2008 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Roy Marples.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd April 5, 2012
+.Dt TABS 1
+.Os
+.Sh NAME
+.Nm tabs
+.Nd set terminal tabs
+.Sh SYNOPSIS
+.Nm
+.Op Fl n Ns | Ns Fl a Ns | Ns Fl a2 Ns | Ns Fl c Ns | Ns Fl c2 \
+Ns | Ns Fl c3 Ns | Ns Fl f Ns | Ns Fl p Ns | Ns Fl s Ns | Ns Fl u
+.Op +m Ns Op n
+.Op Fl T Ar type
+.Nm
+.Op Fl T Ar type
+.Op + Ns Op n
+.Ar n1 Ns Op , Ns Ar n2 , Ns Ar ...
+.Sh DESCRIPTION
+The
+.Nm
+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.
+.Pp
+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.
+.Pp
+The following options are supported:
+.Bl -tag -width Fl
+.It Fl Ar n
+Specifies repetitive tab stops separated by a uniform number of columns,
+.Ar n ,
+where
+.Ar n
+is a single digit decimal number.
+The default usage of
+.Nm
+with no arguments is equivalent to
+.Nm
+.Fl 8 .
+When
+.Fl 0
+is used, the tab stops are cleared and no new ones set.
+.It Fl a
+Assembler, applicable to some mainframes.
+Equivalent to
+.Nm
+1,10,16,36,72 .
+.It Fl a2
+Assembler, applicable to some mainframes.
+Equivalent to
+.Nm
+1,10,16,40,72
+.It Fl c
+.Tn COBOL ,
+normal format.
+Equivalent to
+.Nm
+1,8,12,16,20,55
+.It Fl c2
+.Tn COBOL ,
+compact format (columns 1 to 6 omitted).
+Equivalent to
+.Nm
+1,6,10,14,49
+.It Fl c3
+.Tn COBOL ,
+compact format (columns 1 to 6 omitted), with more tabs than
+.Fl c2 .
+Equivalent to
+.Nm
+1,6,10,14,18,22,26,30,34,38,42,46,50,54,58,62,67
+.It Fl f
+.Tn FORTRAN .
+Equivalent to
+.Nm
+1,7,11,15,19,23
+.It Fl p
+.Tn PL/1 .
+Equivalent to
+.Nm
+1,5,9,13,17,21,25,29,33,37,41,45,49,53,57,61
+.It Fl s
+.Tn SNOBOL .
+Equivalent to
+.Nm
+1,10,55
+.It Fl T Ar type
+Indicates the type of terminal.
+.It Fl u
+Assembler, applicable to some mainframes.
+Equivalent to
+.Nm
+1,12,20,44
+.El
+.Sh ENVIRONMENT
+The
+.Ev COLUMNS
+and
+.Ev TERM
+environment variables affect the execution of
+.Nm
+as described in
+.Xr environ 7 .
+.Pp
+The
+.Fl T
+option overrides
+.Ev TERM .
+If neither
+.Ev TERM
+nor the
+.Fl T
+option are present,
+.Nm
+will fail.
+.Sh EXIT STATUS
+.Ex -std
+.Sh SEE ALSO
+.Xr expand 1 ,
+.Xr stty 1 ,
+.Xr tput 1 ,
+.Xr unexpand 1 ,
+.Xr terminfo 5
+.Sh STANDARDS
+The
+.Nm
+utility conforms to
+.St -p1003.1 .
+.Sh HISTORY
+A
+.Nm
+utility first appeared in PWB UNIX.
+This implementation was introduced in
+.Nx 6.0 .
+.Sh AUTHORS
+.An Roy Marples Aq Mt roy@NetBSD.org