1.\" $NetBSD: cmp.1,v 1.9 2003/08/07 11:13:21 agc 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. Neither the name of the University nor the names of its contributors 18.\" may be used to endorse or promote products derived from this software 19.\" without specific prior written permission. 20.\" 21.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31.\" SUCH DAMAGE. 32.\" 33.\" @(#)cmp.1 8.1 (Berkeley) 6/6/93 34.\" 35.Dd June 6, 1993 36.Dt CMP 1 37.Os 38.Sh NAME 39.Nm cmp 40.Nd compare two files 41.Sh SYNOPSIS 42.Nm 43.Op Fl l | Fl s 44.Ar file1 file2 45.Op Ar skip1 Op Ar skip2 46.Sh DESCRIPTION 47The cmp utility compares two files of any type and writes the results 48to the standard output. 49By default, 50.Nm 51is silent if the files are the same; if they differ, the byte 52and line number at which the first difference occurred is reported. 53.Pp 54Bytes and lines are numbered beginning with one. 55.Pp 56The following options are available: 57.Bl -tag -width flag 58.It Fl l 59Print the byte number (decimal) and the differing 60byte values (octal) for each difference. 61.It Fl s 62Print nothing for differing files; return exit 63status only. 64.El 65.Pp 66The optional arguments 67.Ar skip1 68and 69.Ar skip2 70are the byte offsets from the beginning of 71.Ar file1 72and 73.Ar file2 , 74respectively, where the comparison will begin. 75The offset is decimal by default, but may be expressed as an hexadecimal 76or octal value by preceding it with a leading ``0x'' or ``0''. 77.Pp 78The 79.Nm 80utility exits with one of the following values: 81.Bl -tag -width 4n 82.It 0 83The files are identical. 84.It 1 85The files are different; this includes the case 86where one file is identical to the first part of 87the other. 88In the latter case, if the 89.Fl s 90option has not been specified, 91.Nm 92writes to standard output that EOF was reached in the shorter 93file (before any differences were found). 94.It \*[Gt]1 95An error occurred. 96.El 97.Sh SEE ALSO 98.Xr diff 1 , 99.Xr diff3 1 100.Sh STANDARDS 101The 102.Nm 103utility is expected to be 104.St -p1003.2 105compatible. 106