72 lines
1.5 KiB
Groff
72 lines
1.5 KiB
Groff
.Dd January 22, 2015
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.Dt CUT 1
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.Os
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.Sh NAME
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.Nm cut
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.Nd extract columns of data
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.Sh SYNOPSIS
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.Nm
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.Fl b Ar list
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.Op Fl n
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.Op Ar file ...
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.Nm
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.Fl c Ar list
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.Op Ar file ...
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.Nm
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.Fl f Ar list
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.Op Fl d Ar delim
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.Op Fl s
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.Op Ar file ...
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.Sh DESCRIPTION
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.Nm
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out bytes, characters or delimited fields from each line of
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.Ar file
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and write to stdout.
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.Pp
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If no
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.Ar file
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is given or
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.Ar file
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is '-',
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.Nm
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reads from stdin.
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.Pp
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.Ar list
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is a comma or space separated list of numbers and ranges starting
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from 1. Ranges have the form 'N-M'. If N or M is missing,
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beginning or end of line is assumed. Numbers and ranges
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may be repeated, overlapping and in any order.
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.Pp
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Selected input is written in the same order it is read
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and is written exactly once.
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.Sh OPTIONS
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.Bl -tag -width Ds
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.It Fl b Ar list | Fl c Ar list
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.Ar list
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specifies byte | character positions.
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.It Fl n
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Do not split multibyte characters. A character is written when its
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last byte is selected.
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.It Fl f Ar list
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.Ar list
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specifies field numbers. Lines not containing field
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delimiters are passed through, unless
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.Fl s
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is specified.
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.It Fl d Ar delim
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Use
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.Ar delim
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as field delimiter, which can be an arbitrary string. Default is '\et'.
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.It Fl s
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Suppress lines not containing field delimiters.
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.El
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.Sh STANDARDS
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The
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.Nm
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utility is compliant with the
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.St -p1003.1-2008
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specification.
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.Pp
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The possibility of separating numbers and ranges with a space
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and specifying multibyte delimiters of arbitrary length is an extension to that specification.
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