Annotation of src/usr.bin/uniq/uniq.1, Revision 1.11
1.11 ! jmc 1: .\" $OpenBSD: uniq.1,v 1.10 2004/08/10 22:32:05 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: .\"
1.6 millert 36: .Dd December 8, 2002
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
1.10 jmc 44: .Op Fl c | d | u
1.1 deraadt 45: .Op Fl f Ar fields
46: .Op Fl s Ar chars
47: .Oo
48: .Ar input_file
49: .Op Ar output_file
50: .Oc
51: .Sh DESCRIPTION
52: The
1.5 aaron 53: .Nm
1.3 aaron 54: utility reads the standard input comparing adjacent lines and writes
1.1 deraadt 55: a copy of each unique input line to the standard output.
56: The second and succeeding copies of identical adjacent input lines are
57: not written.
58: Repeated lines in the input will not be detected if they are not adjacent,
59: so it may be necessary to sort the files first.
60: .Pp
1.4 aaron 61: The options are as follows:
1.1 deraadt 62: .Bl -tag -width Ds
63: .It Fl c
64: Precede each output line with the count of the number of times the line
65: occurred in the input, followed by a single space.
66: .It Fl d
1.10 jmc 67: Only output lines which have duplicates.
1.1 deraadt 68: .It Fl f Ar fields
69: Ignore the first
70: .Ar fields
71: in each input line when doing comparisons.
72: A field is a string of non-blank characters separated from adjacent fields
73: by blanks.
1.5 aaron 74: Field numbers are one based, i.e., the first field is field one.
1.1 deraadt 75: .It Fl s Ar chars
76: Ignore the first
77: .Ar chars
78: characters in each input line when doing comparisons.
79: If specified in conjunction with the
80: .Fl f
81: option, the first
82: .Ar chars
83: characters after the first
84: .Ar fields
85: fields will be ignored.
1.5 aaron 86: Character numbers are one based, i.e., the first character is character one.
1.1 deraadt 87: .It Fl u
1.10 jmc 88: Only output lines which are unique.
1.1 deraadt 89: .\".It Fl Ns Ar n
90: .\"(Deprecated; replaced by
91: .\".Fl f ) .
92: .\"Ignore the first n
93: .\"fields on each input line when doing comparisons,
94: .\"where n is a number.
95: .\"A field is a string of non-blank
96: .\"characters separated from adjacent fields
97: .\"by blanks.
98: .\".It Cm \&\(pl Ns Ar n
99: .\"(Deprecated; replaced by
100: .\".Fl s ) .
101: .\"Ignore the first
102: .\".Ar m
103: .\"characters when doing comparisons, where
104: .\".Ar m
105: .\"is a
106: .\"number.
107: .El
108: .Pp
109: If additional arguments are specified on the command line, the first
110: such argument is used as the name of an input file, the second is used
111: as the name of an output file.
1.6 millert 112: A file name of
113: .Ql -
1.7 hugh 114: denotes the standard input or the standard output
115: .Pq depending on its position on the command line .
1.1 deraadt 116: .Pp
117: The
1.5 aaron 118: .Nm
1.10 jmc 119: utility exits 0 on success or \*(Gt0 if an error occurred.
1.5 aaron 120: .Sh SEE ALSO
121: .Xr sort 1
1.9 jmc 122: .Sh STANDARDS
1.11 ! jmc 123: The
! 124: .Nm
! 125: utility is compliant with the
! 126: .St -p1003.1-2004
! 127: specification.
! 128: .Pp
1.1 deraadt 129: The historic
1.10 jmc 130: .Cm + Ns Ar number
1.1 deraadt 131: and
132: .Fl Ns Ar number
133: options have been deprecated but are still supported in this implementation.
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