freebsd-nq/usr.bin/tabs/tabs.1
2002-05-21 02:33:25 +00:00

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.\" Copyright (c) 2002 Tim J. Robbins.
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.Dd May 20, 2002
.Dt TABS 1
.Os
.Sh NAME
.Nm tabs
.Nd set terminal tabs
.Sh SYNOPSIS
.Nm
.Op Fl Ar n | Fl a | a2 | c | c2 | c3 | f | p | s | u
.Op Cm +m Ns Op Ar n
.Op Fl T Ar type
.Nm
.Op Fl T Ar type
.Op Cm + Ns Op Ar n
.Ar n1 Ns Op Ns , Ns Ar n2 , Ns ...
.Sh DESCRIPTION
The
.Nm
utility displays a series of characters that clear the hardware terminal
tab settings then initialises tab stops at specified positions, and
optionally adjusts the margin.
.Pp
In the first synopsis form, the tab stops set depend on the command line
options used, and may be one of the predefined formats or at regular
intervals.
.Pp
In the second synopsis form, tab stops are set at positions
.Ar n1 , Ar n2 ,
etc.
If a position is preceded by a
.Ql + ,
it is relative to the previous position set.
No more than 20 positions may be specified.
.Pp
If no tab stops are specified, the
.Sq standard
.Tn UNIX
tab width of 8 is used.
.Pp
The options are as follows:
.Bl -tag -width indent
.It Fl Ar n
Set a tab stop every
.Ar n
columns.
If
.Ar n
is 0, the tab stops are cleared but no new ones are set.
.It Fl a
Assembler format (columns 1, 10, 16, 36, 72).
.It Fl a2
Assembler format (columns 1, 10, 16, 40, 72).
.It Fl c
COBOL normal format (columns 1, 8, 12, 16, 20, 55)
.It Fl c2
COBOL compact format (columns 1, 6, 10, 14, 49)
.It Fl c3
COBOL compact format (columns 1, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46,
50, 54, 58, 62, 67).
.It Fl f
FORTRAN format (columns 1, 7, 11, 15, 19, 23).
.It Fl p
PL/1 format (columns 1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53,
57, 61).
.It Fl s
SNOBOL format (columns 1, 10, 55).
.It Fl u
Assembler format (columns 1, 12, 20, 44).
.It Xo
.Cm +m Ns Op Ar n ,
.Cm + Ns Op Ar n
.Xc
Set an
.Ar n
character left margin, or 10 if
.Ar n
is omitted.
.It Fl T Ar type
Output escape sequence for the terminal type
.Ar type .
.El
.Sh ENVIRONMENT
.Bl -tag -width indent
.It Ev TERM
Terminal type unless overridden by the
.Fl T
option.
If the
.Ev TERM
environment variable is unset and the
.Fl T
option is not given,
.Nm
will fail.
.El
.Sh DIAGNOSTICS
.Ex -std
.Sh SEE ALSO
.Xr expand 1 ,
.Xr stty 1 ,
.Xr tput 1 ,
.Xr unexpand 1 ,
.Xr termcap 5
.Sh STANDARDS
The
.Nm
utility conforms to
.St -p1003.1-2001 .
.Sh HISTORY
A
.Nm
utility appeared in
.At v7 .
This implementation was introduced in
.Fx 5.0 .
.Sh BUGS
The current
.Xr termcap 5
database does not define the
.Ql ML
(set left soft margin) capability for any terminals.