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76 lines
1.3 KiB
Groff
76 lines
1.3 KiB
Groff
.Dd February 20, 2015
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.Dt NL 1
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.Os sbase
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.Sh NAME
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.Nm nl
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.Nd line numbering filter
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.Sh SYNOPSIS
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.Nm
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.Op Fl b Ar type
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.Op Fl i Ar incr
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.Op Fl n Ar format
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.Op Fl s Ar sep
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.Op Fl v Ar startnum
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.Op Fl w Ar width
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.Op Ar file
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.Sh DESCRIPTION
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.Nm
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reads lines from the named
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.Ar file
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and writes them to stdout with non-empty lines numbered. If no
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.Ar file
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is given
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.Nm
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reads from stdin.
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.Sh OPTIONS
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.Bl -tag -width Ds
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.It Fl b Ar type
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Defines which lines will be numbered:
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.Bl -tag -width pstringXX
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.It a
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All lines.
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.It n
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No lines.
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.It t
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Only non-empty lines (default).
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.It p Ns Ar expr
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Only lines which match
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.Ar expr ,
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a regular expression as defined in
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.Xr regex 7 .
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.El
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.It Fl i Ar incr
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Defines the increment between numbered lines.
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.It Fl n Ar format
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Specify the line number output format.
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The
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.Ar format
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can be any of the following:
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.Bl -tag -width pstringXX
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.It ln
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Left justified.
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.It rn
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Right justified.
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.It rz
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Right justified with leading zeroes.
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.El
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.Pp
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The default
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.Ar format
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is rn.
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.It Fl s Ar sep
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Defines the string used to separate line numbers and lines. By default this is
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a tab.
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.It Fl v Ar startnum
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Start counting from
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.Ar startnum
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instead of the default 1.
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.It Fl w Ar width
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The number of characters to be occupied by the line number
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will be set to
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.Ar width .
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The default is 6.
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.El
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.Sh SEE ALSO
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.Xr pr 1
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