Annotation of src/usr.bin/comm/comm.1, Revision 1.9
1.9 ! millert 1: .\" $OpenBSD: comm.1,v 1.8 2002/01/25 19:57:46 mickey 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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1.9 ! 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.
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34: .\" @(#)comm.1 8.1 (Berkeley) 6/6/93
35: .\"
36: .Dd June 6, 1993
1.6 aaron 37: .Dt COMM 1
1.1 deraadt 38: .Os
39: .Sh NAME
40: .Nm comm
41: .Nd select or reject lines common to two files
42: .Sh SYNOPSIS
43: .Nm comm
1.4 deraadt 44: .Op Fl 123f
1.1 deraadt 45: .Ar file1 file2
46: .Sh DESCRIPTION
47: The
1.5 aaron 48: .Nm
1.1 deraadt 49: utility reads
50: .Ar file1
51: and
52: .Ar file2 ,
53: which should be
54: sorted lexically, and produces three text
55: columns as output: lines only in
56: .Ar file1 ;
57: lines only in
58: .Ar file2 ;
59: and lines in both files.
60: .Pp
1.7 aaron 61: The filename
62: .Dq -
63: means the standard input.
1.1 deraadt 64: .Pp
1.7 aaron 65: The options are as follows:
1.1 deraadt 66: .Bl -tag -width Ds
67: .It Fl 1
68: Suppress printing of column 1.
69: .It Fl 2
70: Suppress printing of column 2.
71: .It Fl 3
72: Suppress printing of column 3.
1.4 deraadt 73: .It Fl f
74: Fold case in line comparisons.
1.1 deraadt 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
1.5 aaron 83: .Nm
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
1.7 aaron 94: .Pp
1.3 aaron 95: The
1.5 aaron 96: .Nm
1.3 aaron 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
1.5 aaron 105: .Nm
106: utility conforms to
1.1 deraadt 107: .St -p1003.2-92 .
1.8 mickey 108: .Sh HISTORY
109: A
110: .Nm
111: command appeared in
112: .At v4 .