Annotation of src/usr.bin/uniq/uniq.1, Revision 1.1
1.1 ! deraadt 1: .\" $NetBSD: uniq.1,v 1.5 1994/12/06 07:51:15 jtc Exp $
! 2: .\"
! 3: .\" Copyright (c) 1991, 1993
! 4: .\" The Regents of the University of California. All rights reserved.
! 5: .\"
! 6: .\" This code is derived from software contributed to Berkeley by
! 7: .\" the Institute of Electrical and Electronics Engineers, Inc.
! 8: .\"
! 9: .\" Redistribution and use in source and binary forms, with or without
! 10: .\" modification, are permitted provided that the following conditions
! 11: .\" are met:
! 12: .\" 1. Redistributions of source code must retain the above copyright
! 13: .\" notice, this list of conditions and the following disclaimer.
! 14: .\" 2. Redistributions in binary form must reproduce the above copyright
! 15: .\" notice, this list of conditions and the following disclaimer in the
! 16: .\" documentation and/or other materials provided with the distribution.
! 17: .\" 3. All advertising materials mentioning features or use of this software
! 18: .\" must display the following acknowledgement:
! 19: .\" This product includes software developed by the University of
! 20: .\" California, Berkeley and its contributors.
! 21: .\" 4. Neither the name of the University nor the names of its contributors
! 22: .\" may be used to endorse or promote products derived from this software
! 23: .\" without specific prior written permission.
! 24: .\"
! 25: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 33: .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 34: .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: .\" SUCH DAMAGE.
! 36: .\"
! 37: .\" @(#)uniq.1 8.1 (Berkeley) 6/6/93
! 38: .\"
! 39: .Dd June 6, 1993
! 40: .Dt UNIQ 1
! 41: .Os
! 42: .Sh NAME
! 43: .Nm uniq
! 44: .Nd report or filter out repeated lines in a file
! 45: .Sh SYNOPSIS
! 46: .Nm uniq
! 47: .Op Fl c | Fl d | Fl u
! 48: .Op Fl f Ar fields
! 49: .Op Fl s Ar chars
! 50: .Oo
! 51: .Ar input_file
! 52: .Op Ar output_file
! 53: .Oc
! 54: .Sh DESCRIPTION
! 55: The
! 56: .Nm uniq
! 57: utility reads the standard input comparing adjacent lines, and writes
! 58: a copy of each unique input line to the standard output.
! 59: The second and succeeding copies of identical adjacent input lines are
! 60: not written.
! 61: Repeated lines in the input will not be detected if they are not adjacent,
! 62: so it may be necessary to sort the files first.
! 63: .Pp
! 64: The following options are available:
! 65: .Bl -tag -width Ds
! 66: .It Fl c
! 67: Precede each output line with the count of the number of times the line
! 68: occurred in the input, followed by a single space.
! 69: .It Fl d
! 70: Don't output lines that are not repeated in the input.
! 71: .It Fl f Ar fields
! 72: Ignore the first
! 73: .Ar fields
! 74: in each input line when doing comparisons.
! 75: A field is a string of non-blank characters separated from adjacent fields
! 76: by blanks.
! 77: Field numbers are one based, i.e. the first field is field one.
! 78: .It Fl s Ar chars
! 79: Ignore the first
! 80: .Ar chars
! 81: characters in each input line when doing comparisons.
! 82: If specified in conjunction with the
! 83: .Fl f
! 84: option, the first
! 85: .Ar chars
! 86: characters after the first
! 87: .Ar fields
! 88: fields will be ignored.
! 89: Character numbers are one based, i.e. the first character is character one.
! 90: .It Fl u
! 91: Don't output lines that are repeated in the input.
! 92: .\".It Fl Ns Ar n
! 93: .\"(Deprecated; replaced by
! 94: .\".Fl f ) .
! 95: .\"Ignore the first n
! 96: .\"fields on each input line when doing comparisons,
! 97: .\"where n is a number.
! 98: .\"A field is a string of non-blank
! 99: .\"characters separated from adjacent fields
! 100: .\"by blanks.
! 101: .\".It Cm \&\(pl Ns Ar n
! 102: .\"(Deprecated; replaced by
! 103: .\".Fl s ) .
! 104: .\"Ignore the first
! 105: .\".Ar m
! 106: .\"characters when doing comparisons, where
! 107: .\".Ar m
! 108: .\"is a
! 109: .\"number.
! 110: .El
! 111: .Pp
! 112: If additional arguments are specified on the command line, the first
! 113: such argument is used as the name of an input file, the second is used
! 114: as the name of an output file.
! 115: .Pp
! 116: The
! 117: .Nm uniq
! 118: utility exits 0 on success, and >0 if an error occurs.
! 119: .Sh COMPATIBILITY
! 120: The historic
! 121: .Cm \&\(pl Ns Ar number
! 122: and
! 123: .Fl Ns Ar number
! 124: options have been deprecated but are still supported in this implementation.
! 125: .Sh SEE ALSO
! 126: .Xr sort 1
! 127: .Sh STANDARDS
! 128: The
! 129: .Nm uniq
! 130: utility is expected to be
! 131: .St -p1003.2
! 132: compatible.
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