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+.\"	$NetBSD: uniq.1,v 1.13 2012/08/26 14:13:50 wiz Exp $
+.\"
+.\" Copyright (c) 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" the Institute of Electrical and Electronics Engineers, Inc.
+.\"
+.\" 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.
+.\" 3. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+.\"
+.\"     @(#)uniq.1	8.1 (Berkeley) 6/6/93
+.\"
+.Dd August 26, 2012
+.Dt UNIQ 1
+.Os
+.Sh NAME
+.Nm uniq
+.Nd report or filter out repeated lines in a file
+.Sh SYNOPSIS
+.Nm
+.Op Fl cdu
+.Op Fl f Ar fields
+.Op Fl s Ar chars
+.Oo
+.Ar input_file
+.Op Ar output_file
+.Oc
+.Sh DESCRIPTION
+The
+.Nm
+utility reads the standard input comparing adjacent lines, and writes
+a copy of each unique input line to the standard output.
+The second and succeeding copies of identical adjacent input lines are
+not written.
+Repeated lines in the input will not be detected if they are not adjacent,
+so it may be necessary to sort the files first.
+.Pp
+The following options are available:
+.Bl -tag -width Ds
+.It Fl c
+Precede each output line with the count of the number of times the line
+occurred in the input, followed by a single space.
+.It Fl d
+Don't output lines that are not repeated in the input.
+.It Fl f Ar fields
+Ignore the first
+.Ar fields
+in each input line when doing comparisons.
+A field is a string of non-blank characters separated from adjacent fields
+by blanks.
+Field numbers are one based, i.e., the first field is field one.
+.It Fl s Ar chars
+Ignore the first
+.Ar chars
+characters in each input line when doing comparisons.
+If specified in conjunction with the
+.Fl f
+option, the first
+.Ar chars
+characters after the first
+.Ar fields
+fields will be ignored.
+Character numbers are one based, i.e., the first character is character one.
+.It Fl u
+Don't output lines that are repeated in the input.
+.\".It Fl Ns Ar n
+.\"(Deprecated; replaced by
+.\".Fl f ) .
+.\"Ignore the first n
+.\"fields on each input line when doing comparisons,
+.\"where n is a number.
+.\"A field is a string of non-blank
+.\"characters separated from adjacent fields
+.\"by blanks.
+.\".It Cm \&\(pl Ns Ar n
+.\"(Deprecated; replaced by
+.\".Fl s ) .
+.\"Ignore the first
+.\".Ar m
+.\"characters when doing comparisons, where
+.\".Ar m
+.\"is a
+.\"number.
+.El
+.Pp
+Additional arguments
+.Ar input_file
+and
+.Ar output_file
+may be specified on the command line,
+where the former is then used as the name of an input file,
+and the latter as the name of an output file.
+.Sh EXIT STATUS
+.Ex -std
+.Sh COMPATIBILITY
+The historic
+.Cm \&\(pl Ns Ar number
+and
+.Fl Ns Ar number
+options have been deprecated but are still supported in this implementation.
+.Sh SEE ALSO
+.Xr sort 1
+.Sh STANDARDS
+The
+.Nm
+utility is expected to be
+.St -p1003.2
+compatible.