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Annotation of src/usr.bin/comm/comm.1, Revision 1.8

1.8     ! mickey      1: .\"    $OpenBSD: comm.1,v 1.7 2000/03/05 00:28:52 aaron 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: .\"
                     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.
                     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.
                     25: .\"
                     26: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     27: .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     28: .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     29: .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     30: .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     31: .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     32: .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     33: .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     34: .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     35: .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     36: .\" SUCH DAMAGE.
                     37: .\"
                     38: .\"     @(#)comm.1     8.1 (Berkeley) 6/6/93
                     39: .\"
                     40: .Dd June 6, 1993
1.6       aaron      41: .Dt COMM 1
1.1       deraadt    42: .Os
                     43: .Sh NAME
                     44: .Nm comm
                     45: .Nd select or reject lines common to two files
                     46: .Sh SYNOPSIS
                     47: .Nm comm
1.4       deraadt    48: .Op Fl 123f
1.1       deraadt    49: .Ar file1 file2
                     50: .Sh DESCRIPTION
                     51: The
1.5       aaron      52: .Nm
1.1       deraadt    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
1.7       aaron      65: The filename
                     66: .Dq -
                     67: means the standard input.
1.1       deraadt    68: .Pp
1.7       aaron      69: The options are as follows:
1.1       deraadt    70: .Bl -tag -width Ds
                     71: .It Fl 1
                     72: Suppress printing of column 1.
                     73: .It Fl 2
                     74: Suppress printing of column 2.
                     75: .It Fl 3
                     76: Suppress printing of column 3.
1.4       deraadt    77: .It Fl f
                     78: Fold case in line comparisons.
1.1       deraadt    79: .El
                     80: .Pp
                     81: Each column will have a number of tab characters prepended to it
                     82: equal to the number of lower numbered columns that are being printed.
                     83: For example, if column number two is being suppressed, lines printed
                     84: in column number one will not have any tabs preceding them, and lines
                     85: printed in column number three will have one.
                     86: .Pp
1.5       aaron      87: .Nm
1.1       deraadt    88: assumes that the files are lexically sorted; all characters
                     89: participate in line comparisons.
                     90: .\" .Sh ENVIRONMENT
                     91: .\" .Bl -tag -width indent
                     92: .\" .It Ev LANG
                     93: .\" .It Ev LC_ALL
                     94: .\" .It Ev LC_CTYPE
                     95: .\" .It Ev LC_COLLATE
                     96: .\" .It Ev LC_MESSAGES
                     97: .\" .El
1.7       aaron      98: .Pp
1.3       aaron      99: The
1.5       aaron     100: .Nm
1.3       aaron     101: utility exits 0 on success or >0 if an error occurred.
1.1       deraadt   102: .Sh SEE ALSO
                    103: .Xr cmp 1 ,
                    104: .Xr diff 1 ,
                    105: .Xr sort 1 ,
                    106: .Xr uniq 1
                    107: .Sh STANDARDS
                    108: The
1.5       aaron     109: .Nm
                    110: utility conforms to
1.1       deraadt   111: .St -p1003.2-92 .
1.8     ! mickey    112: .Sh HISTORY
        !           113: A
        !           114: .Nm
        !           115: command appeared in
        !           116: .At v4 .