sbase/nl.1

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.Dd March 22, 2015
.Dt NL 1
.Os sbase
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.Sh NAME
.Nm nl
.Nd line numbering filter
.Sh SYNOPSIS
.Nm
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.Op Fl p
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.Op Fl b Ar type
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.Op Fl d Ar delim
.Op Fl f Ar type
.Op Fl h Ar type
.Op Fl i Ar num
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.Op Fl l Ar num
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.Op Fl n Ar format
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.Op Fl s Ar sep
.Op Fl v Ar num
.Op Fl w Ar num
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.Op Ar file
.Sh DESCRIPTION
.Nm
reads lines from
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.Ar file
and writes them to stdout, numbering non-empty lines.
If no
.Ar file
is given
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.Nm
reads from stdin.
.Sh OPTIONS
.Bl -tag -width Ds
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.It Fl p
Do not reset line number for logical pages.
.It Fl h Ar type | Fl b Ar type | Fl f Ar type
Define which lines to number in the head | body | footer section:
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.Bl -tag -width pstringXX
.It a
All lines.
.It n
No lines.
.It t
Only non-empty lines. This is the default.
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.It p Ns Ar expr
Only lines matching
.Ar expr
according to
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.Xr regex 7 .
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.El
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.It Fl d Ar delim
Set
.Ar delim
as the delimiter for logical pages. If
.Ar delim
is only on character,
.Nm
appends ":" to it. The default is "\e:".
.It Fl i Ar num
Set the increment between numbered lines to
.Ar num .
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.It Fl l Ar num
Set the number of adjacent blank lines to be considered as one to
.Ar num .
The default is 1.
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.It Fl n Ar format
Set the line number output
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.Ar format
to one of:
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.Bl -tag -width pstringXX
.It ln
Left justified.
.It rn
Right justified. This is the default.
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.It rz
Right justified with leading zeroes.
.El
.Pp
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.It Fl s Ar sep
Use
.Ar sep
to separate line numbers and lines. The default is "\et".
.It Fl v Ar num
Start counting lines from
.Ar num .
The default is 1.
.It Fl w Ar num
Set the width of the line number to
.Ar num .
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The default is 6.
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.El
.Sh SEE ALSO
.Xr pr 1
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.Sh STANDARDS
The
.Nm
utility is compliant with the
.St -p1003.1-2008
specification.