Annotation of src/usr.bin/uniq/uniq.1, Revision 1.17
1.17 ! jmc 1: .\" $OpenBSD: uniq.1,v 1.16 2009/02/08 17:15:10 jmc Exp $
1.1 deraadt 2: .\" $NetBSD: uniq.1,v 1.5 1994/12/06 07:51:15 jtc Exp $
3: .\"
4: .\" Copyright (c) 1991, 1993
5: .\" The Regents of the University of California. All rights reserved.
6: .\"
7: .\" This code is derived from software contributed to Berkeley by
8: .\" the Institute of Electrical and Electronics Engineers, Inc.
9: .\"
10: .\" Redistribution and use in source and binary forms, with or without
11: .\" modification, are permitted provided that the following conditions
12: .\" are met:
13: .\" 1. Redistributions of source code must retain the above copyright
14: .\" notice, this list of conditions and the following disclaimer.
15: .\" 2. Redistributions in binary form must reproduce the above copyright
16: .\" notice, this list of conditions and the following disclaimer in the
17: .\" documentation and/or other materials provided with the distribution.
1.8 millert 18: .\" 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 19: .\" may be used to endorse or promote products derived from this software
20: .\" without specific prior written permission.
21: .\"
22: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23: .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24: .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25: .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26: .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27: .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28: .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29: .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30: .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31: .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32: .\" SUCH DAMAGE.
33: .\"
34: .\" @(#)uniq.1 8.1 (Berkeley) 6/6/93
35: .\"
1.17 ! jmc 36: .Dd $Mdocdate: February 8 2009 $
1.1 deraadt 37: .Dt UNIQ 1
38: .Os
39: .Sh NAME
40: .Nm uniq
41: .Nd report or filter out repeated lines in a file
42: .Sh SYNOPSIS
43: .Nm uniq
1.14 kili 44: .Op Fl c
45: .Op Fl d | u
1.1 deraadt 46: .Op Fl f Ar fields
47: .Op Fl s Ar chars
48: .Oo
49: .Ar input_file
50: .Op Ar output_file
51: .Oc
52: .Sh DESCRIPTION
53: The
1.5 aaron 54: .Nm
1.3 aaron 55: utility reads the standard input comparing adjacent lines and writes
1.1 deraadt 56: a copy of each unique input line to the standard output.
57: The second and succeeding copies of identical adjacent input lines are
58: not written.
59: Repeated lines in the input will not be detected if they are not adjacent,
60: so it may be necessary to sort the files first.
61: .Pp
1.4 aaron 62: The options are as follows:
1.1 deraadt 63: .Bl -tag -width Ds
64: .It Fl c
65: Precede each output line with the count of the number of times the line
66: occurred in the input, followed by a single space.
67: .It Fl d
1.10 jmc 68: Only output lines which have duplicates.
1.1 deraadt 69: .It Fl f Ar fields
70: Ignore the first
71: .Ar fields
72: in each input line when doing comparisons.
73: A field is a string of non-blank characters separated from adjacent fields
1.13 kili 74: by blanks, with blanks considered part of the following field.
1.5 aaron 75: Field numbers are one based, i.e., the first field is field one.
1.1 deraadt 76: .It Fl s Ar chars
77: Ignore the first
78: .Ar chars
79: characters in each input line when doing comparisons.
80: If specified in conjunction with the
81: .Fl f
82: option, the first
83: .Ar chars
84: characters after the first
85: .Ar fields
86: fields will be ignored.
1.5 aaron 87: Character numbers are one based, i.e., the first character is character one.
1.1 deraadt 88: .It Fl u
1.10 jmc 89: Only output lines which are unique.
1.1 deraadt 90: .\".It Fl Ns Ar n
91: .\"(Deprecated; replaced by
92: .\".Fl f ) .
93: .\"Ignore the first n
94: .\"fields on each input line when doing comparisons,
95: .\"where n is a number.
96: .\"A field is a string of non-blank
97: .\"characters separated from adjacent fields
98: .\"by blanks.
99: .\".It Cm \&\(pl Ns Ar n
100: .\"(Deprecated; replaced by
101: .\".Fl s ) .
102: .\"Ignore the first
103: .\".Ar m
104: .\"characters when doing comparisons, where
105: .\".Ar m
106: .\"is a
107: .\"number.
108: .El
109: .Pp
110: If additional arguments are specified on the command line, the first
111: such argument is used as the name of an input file, the second is used
112: as the name of an output file.
1.6 millert 113: A file name of
114: .Ql -
1.7 hugh 115: denotes the standard input or the standard output
116: .Pq depending on its position on the command line .
1.17 ! jmc 117: .Sh EXIT STATUS
1.15 sobrado 118: .Ex -std uniq
1.5 aaron 119: .Sh SEE ALSO
120: .Xr sort 1
1.9 jmc 121: .Sh STANDARDS
1.11 jmc 122: The
123: .Nm
124: utility is compliant with the
1.16 jmc 125: .St -p1003.1-2008
1.11 jmc 126: specification.
1.14 kili 127: .Pp
128: The use of
129: .Fl c
130: in conjunction with
131: .Fl d
132: or
133: .Fl u
134: is an extension to that specification.
1.11 jmc 135: .Pp
1.1 deraadt 136: The historic
1.10 jmc 137: .Cm + Ns Ar number
1.1 deraadt 138: and
139: .Fl Ns Ar number
140: options have been deprecated but are still supported in this implementation.
![[BACK]](/icons/back.gif){kind=icon}
Return to uniq.1 CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / uniq