Annotation of src/usr.bin/comm/comm.1, Revision 1.3
1.3 ! aaron 1: .\" $OpenBSD: comm.1,v 1.2 1996/06/26 05:32:17 deraadt Exp $
1.1 deraadt 2: .\" $NetBSD: comm.1,v 1.4 1995/03/26 09:25:50 glass Exp $
3: .\"
4: .\" Copyright (c) 1989, 1990, 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: .\"
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11: .\" modification, are permitted provided that the following conditions
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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
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17: .\" documentation and/or other materials provided with the distribution.
18: .\" 3. All advertising materials mentioning features or use of this software
19: .\" must display the following acknowledgement:
20: .\" This product includes software developed by the University of
21: .\" California, Berkeley and its contributors.
22: .\" 4. Neither the name of the University nor the names of its contributors
23: .\" may be used to endorse or promote products derived from this software
24: .\" without specific prior written permission.
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26: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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38: .\" @(#)comm.1 8.1 (Berkeley) 6/6/93
39: .\"
40: .Dd June 6, 1993
41: .Os
42: .Dt COMM 1
43: .Sh NAME
44: .Nm comm
45: .Nd select or reject lines common to two files
46: .Sh SYNOPSIS
47: .Nm comm
48: .Op Fl 123
49: .Ar file1 file2
50: .Sh DESCRIPTION
51: The
52: .Nm comm
53: utility reads
54: .Ar file1
55: and
56: .Ar file2 ,
57: which should be
58: sorted lexically, and produces three text
59: columns as output: lines only in
60: .Ar file1 ;
61: lines only in
62: .Ar file2 ;
63: and lines in both files.
64: .Pp
65: The filename ``-'' means the standard input.
66: .Pp
67: The following options are available:
68: .Bl -tag -width Ds
69: .It Fl 1
70: Suppress printing of column 1.
71: .It Fl 2
72: Suppress printing of column 2.
73: .It Fl 3
74: Suppress printing of column 3.
75: .El
76: .Pp
77: Each column will have a number of tab characters prepended to it
78: equal to the number of lower numbered columns that are being printed.
79: For example, if column number two is being suppressed, lines printed
80: in column number one will not have any tabs preceding them, and lines
81: printed in column number three will have one.
82: .Pp
1.3 ! aaron 83: .Nm comm
1.1 deraadt 84: assumes that the files are lexically sorted; all characters
85: participate in line comparisons.
86: .\" .Sh ENVIRONMENT
87: .\" .Bl -tag -width indent
88: .\" .It Ev LANG
89: .\" .It Ev LC_ALL
90: .\" .It Ev LC_CTYPE
91: .\" .It Ev LC_COLLATE
92: .\" .It Ev LC_MESSAGES
93: .\" .El
94: .Sh DIAGNOSTICS
1.3 ! aaron 95: The
! 96: .Nm comm
! 97: utility exits 0 on success or >0 if an error occurred.
1.1 deraadt 98: .Sh SEE ALSO
99: .Xr cmp 1 ,
100: .Xr diff 1 ,
101: .Xr sort 1 ,
102: .Xr uniq 1
103: .Sh STANDARDS
104: The
105: .Nm comm
106: utility conforms to
107: .St -p1003.2-92 .