1.\" $NetBSD: cmp.1,v 1.8 2002/02/08 01:36:20 ross Exp $ 2.\" 3.\" Copyright (c) 1987, 1990, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" This code is derived from software contributed to Berkeley by 7.\" the Institute of Electrical and Electronics Engineers, Inc. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 3. All advertising materials mentioning features or use of this software 18.\" must display the following acknowledgement: 19.\" This product includes software developed by the University of 20.\" California, Berkeley and its contributors. 21.\" 4. Neither the name of the University nor the names of its contributors 22.\" may be used to endorse or promote products derived from this software 23.\" without specific prior written permission. 24.\" 25.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35.\" SUCH DAMAGE. 36.\" 37.\" @(#)cmp.1 8.1 (Berkeley) 6/6/93 38.\" 39.Dd June 6, 1993 40.Dt CMP 1 41.Os 42.Sh NAME 43.Nm cmp 44.Nd compare two files 45.Sh SYNOPSIS 46.Nm 47.Op Fl l | Fl s 48.Ar file1 file2 49.Op Ar skip1 Op Ar skip2 50.Sh DESCRIPTION 51The cmp utility compares two files of any type and writes the results 52to the standard output. 53By default, 54.Nm 55is silent if the files are the same; if they differ, the byte 56and line number at which the first difference occurred is reported. 57.Pp 58Bytes and lines are numbered beginning with one. 59.Pp 60The following options are available: 61.Bl -tag -width flag 62.It Fl l 63Print the byte number (decimal) and the differing 64byte values (octal) for each difference. 65.It Fl s 66Print nothing for differing files; return exit 67status only. 68.El 69.Pp 70The optional arguments 71.Ar skip1 72and 73.Ar skip2 74are the byte offsets from the beginning of 75.Ar file1 76and 77.Ar file2 , 78respectively, where the comparison will begin. 79The offset is decimal by default, but may be expressed as an hexadecimal 80or octal value by preceding it with a leading ``0x'' or ``0''. 81.Pp 82The 83.Nm 84utility exits with one of the following values: 85.Bl -tag -width 4n 86.It 0 87The files are identical. 88.It 1 89The files are different; this includes the case 90where one file is identical to the first part of 91the other. 92In the latter case, if the 93.Fl s 94option has not been specified, 95.Nm 96writes to standard output that EOF was reached in the shorter 97file (before any differences were found). 98.It \*[Gt]1 99An error occurred. 100.El 101.Sh SEE ALSO 102.Xr diff 1 , 103.Xr diff3 1 104.Sh STANDARDS 105The 106.Nm 107utility is expected to be 108.St -p1003.2 109compatible. 110