1.\" Copyright (c) 1987, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the Institute of Electrical and Electronics Engineers, Inc. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. All advertising materials mentioning features or use of this software 16.\" must display the following acknowledgement: 17.\" This product includes software developed by the University of 18.\" California, Berkeley and its contributors. 19.\" 4. Neither the name of the University nor the names of its contributors 20.\" may be used to endorse or promote products derived from this software 21.\" without specific prior written permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 35.\" @(#)cmp.1 8.1 (Berkeley) 6/6/93 36.\" $Id$ 37.\" 38.Dd June 6, 1993 39.Dt CMP 1 40.Os 41.Sh NAME 42.Nm cmp 43.Nd compare two files 44.Sh SYNOPSIS 45.Nm cmp 46.Op Fl l | Fl s 47.Ar file1 file2 48.Op Ar skip1 Op Ar skip2 49.Sh DESCRIPTION 50The cmp utility compares two files of any type and writes the results 51to the standard output. 52By default, 53.Nm 54is silent if the files are the same; if they differ, the byte 55and line number at which the first difference occurred is reported. 56.Pp 57Bytes and lines are numbered beginning with one. 58.Pp 59The following options are available: 60.Bl -tag -width flag 61.It Fl l 62Print the byte number (decimal) and the differing 63byte values (octal) for each difference. 64.It Fl s 65Print nothing for differing files; return exit 66status only. 67.El 68.Pp 69The optional arguments 70.Ar skip1 71and 72.Ar skip2 73are the byte offsets from the beginning of 74.Ar file1 75and 76.Ar file2 , 77respectively, where the comparison will begin. 78The offset is decimal by default, but may be expressed as an hexadecimal 79or octal value by preceding it with a leading ``0x'' or ``0''. 80.Pp 81The 82.Nm cmp 83utility exits with one of the following values: 84.Bl -tag -width 4n 85.It 0 86The files are identical. 87.It 1 88The files are different; this includes the case 89where one file is identical to the first part of 90the other. 91In the latter case, if the 92.Fl s 93option has not been specified, 94.Nm cmp 95writes to standard output that EOF was reached in the shorter 96file (before any differences were found). 97.It >1 98An error occurred. 99.El 100.Sh SEE ALSO 101.Xr diff 1 , 102.Xr diff3 1 103.Sh STANDARDS 104The 105.Nm cmp 106utility is expected to be 107.St -p1003.2 108compatible. 109.Sh HISTORY 110A 111.Nm 112command appeared in 113.At v1 . 114