1.\" $OpenBSD: cmp.1,v 1.9 2000/11/09 17:52:06 aaron Exp $ 2.\" $NetBSD: cmp.1,v 1.4 1995/09/08 03:22:55 tls Exp $ 3.\" 4.\" Copyright (c) 1987, 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.\" @(#)cmp.1 8.1 (Berkeley) 6/6/93 39.\" 40.Dd June 6, 1993 41.Dt CMP 1 42.Os 43.Sh NAME 44.Nm cmp 45.Nd compare two files 46.Sh SYNOPSIS 47.Nm cmp 48.Op Fl l | Fl s 49.Ar file1 file2 50.Op Ar skip1 Op Ar skip2 51.Sh DESCRIPTION 52The 53.Nm 54utility compares two files of any type and writes the results 55to the standard output. 56By default, 57.Nm 58is silent if the files are the same; if they differ, the byte 59and line number at which the first difference occurred is reported. 60.Pp 61Bytes and lines are numbered beginning with one. 62.Pp 63The options are as follows: 64.Bl -tag -width Ds 65.It Fl l 66Print the byte number (decimal) and the differing 67byte values (octal) for each difference. 68.It Fl s 69Print nothing for differing files; return exit 70status only. 71.El 72.Pp 73The optional arguments 74.Ar skip1 75and 76.Ar skip2 77are the byte offsets from the beginning of 78.Ar file1 79and 80.Ar file2 , 81respectively, where the comparison will begin. 82The offset is decimal by default, but may be expressed as a hexadecimal 83or octal value by preceding it with a leading 84.Dq 0x 85or 86.Dq 0 . 87.Pp 88The 89.Nm 90utility exits with one of the following values: 91.Bl -tag -width 4n 92.It 0 93The files are identical. 94.It 1 95The files are different; this includes the case 96where one file is identical to the first part of 97the other. 98In the latter case, if the 99.Fl s 100option has not been specified, 101.Nm 102writes to standard error that 103.Dv EOF 104was reached in the shorter 105file (before any differences were found). 106.It >1 107An error occurred. 108.El 109.Sh SEE ALSO 110.Xr diff 1 , 111.Xr diff3 1 112.Sh STANDARDS 113The 114.Nm 115utility is expected to be 116.St -p1003.2 117compatible. 118.Sh HISTORY 119A 120.Nm 121command appeared in 122.At v1 . 123