mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
104 lines
3.3 KiB
Groff
104 lines
3.3 KiB
Groff
.\" Copyright (c) 1989, 1990, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to Berkeley by
|
|
.\" the Institute of Electrical and Electronics Engineers, Inc.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" From: @(#)comm.1 8.1 (Berkeley) 6/6/93
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd June 6, 1993
|
|
.Os
|
|
.Dt COMM 1
|
|
.Sh NAME
|
|
.Nm comm
|
|
.Nd select or reject lines common to two files
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl 123i
|
|
.Ar file1 file2
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility reads
|
|
.Ar file1
|
|
and
|
|
.Ar file2 ,
|
|
which should be
|
|
sorted lexically, and produces three text
|
|
columns as output: lines only in
|
|
.Ar file1 ;
|
|
lines only in
|
|
.Ar file2 ;
|
|
and lines in both files.
|
|
.Pp
|
|
The filename ``-'' means the standard input.
|
|
.Pp
|
|
The following options are available:
|
|
.Bl -tag -width indent
|
|
.It Fl 1
|
|
Suppress printing of column 1.
|
|
.It Fl 2
|
|
Suppress printing of column 2.
|
|
.It Fl 3
|
|
Suppress printing of column 3.
|
|
.It Fl i
|
|
Case insensitive comparison of lines.
|
|
.El
|
|
.Pp
|
|
Each column will have a number of tab characters prepended to it
|
|
equal to the number of lower numbered columns that are being printed.
|
|
For example, if column number two is being suppressed, lines printed
|
|
in column number one will not have any tabs preceding them, and lines
|
|
printed in column number three will have one.
|
|
.Pp
|
|
The
|
|
.Nm
|
|
utility assumes that the files are lexically sorted; all characters
|
|
participate in line comparisons.
|
|
.Sh DIAGNOSTICS
|
|
.Ex -std
|
|
.Sh SEE ALSO
|
|
.Xr cmp 1 ,
|
|
.Xr diff 1 ,
|
|
.Xr sort 1 ,
|
|
.Xr uniq 1
|
|
.Sh STANDARDS
|
|
The
|
|
.Nm
|
|
utility conforms to
|
|
.St -p1003.2-92 .
|
|
.Sh HISTORY
|
|
A
|
|
.Nm
|
|
command appeared in
|
|
.At v4 .
|