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.\" 37.Dd June 6, 1993 38.Dt CMP 1 39.Os 40.Sh NAME 41.Nm cmp 42.Nd compare two files 43.Sh SYNOPSIS 44.Nm cmp 45.Op Fl l | Fl s 46.Ar file1 file2 47.Op Ar skip1 Op Ar skip2 48.Sh DESCRIPTION 49The cmp utility compares two files of any type and writes the results 50to the standard output. 51By default, 52.Nm 53is silent if the files are the same; if they differ, the byte 54and line number at which the first difference occurred is reported. 55.Pp 56Bytes and lines are numbered beginning with one. 57.Pp 58The following options are available: 59.Bl -tag -width flag 60.It Fl l 61Print the byte number (decimal) and the differing 62byte values (octal) for each difference. 63.It Fl s 64Print nothing for differing files; return exit 65status only. 66.El 67.Pp 68The optional arguments 69.Ar skip1 70and 71.Ar skip2 72are the byte offsets from the beginning of 73.Ar file1 74and 75.Ar file2 , 76respectively, where the comparison will begin. 77The offset is decimal by default, but may be expressed as an hexadecimal 78or octal value by preceding it with a leading ``0x'' or ``0''. 79.Pp 80The 81.Nm cmp 82utility exits with one of the following values: 83.Bl -tag -width 4n 84.It 0 85The files are identical. 86.It 1 87The files are different; this includes the case 88where one file is identical to the first part of 89the other. 90In the latter case, if the 91.Fl s 92option has not been specified, 93.Nm cmp 94writes to standard output that EOF was reached in the shorter 95file (before any differences were found). 96.It >1 97An error occurred. 98.El 99.Sh SEE ALSO 100.Xr diff 1 , 101.Xr diff3 1 102.Sh STANDARDS 103The 104.Nm cmp 105utility is expected to be 106.St -p1003.2 107compatible. 108