.\" Copyright (c) 1987, 1990 The Regents of the University of California.
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+.\" This code is derived from software contributed to Berkeley by
+.\" the Institute of Electrical and Electronics Engineers, Inc.
.\"
-.\" @(#)cmp.1 6.4 (Berkeley) 7/24/90
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
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+.\" 1. Redistributions of source code must retain the above copyright
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+.\" California, Berkeley and its contributors.
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+.\" may be used to endorse or promote products derived from this software
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-.Dd July 24, 1990
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+.\"
+.\" @(#)cmp.1 6.7 (Berkeley) 6/27/91
+.\"
+.Dd June 27, 1991
.Dt CMP 1
-.Os BSD 4.4
+.Os
.Sh NAME
.Nm cmp
.Nd Compare two files.
.Sh DESCRIPTION
The cmp utility compares two files of any type and
writes the results to the standard output.
-Under default options,
+By default,
.Nm
-is silent
-if the files are the same; if they
-differ, the byte and line
-number at which the first difference occurred is reported.
-Bytes and
-lines are numbered beginning with one.
+is silent if the files are the same; if they differ, the byte
+and line number at which the first difference occurred is reported.
+.Pp
+Bytes and lines are numbered beginning with one.
.Pp
The following options are available:
-.Tw Ds
-.Tp Fl l
+.Bl -tag -width Ds
+.It Fl l
Print the byte number (decimal) and the differing
-byte values (octal) for each difference, respectively.
-.Tp Fl s
+byte values (octal) for each difference.
+.It Fl s
Print nothing for differing files; return exit
status only.
-.Tp
+.El
.Pp
-The following operands are available:
-.Tw file1
-.Tp Ar file1
-A pathname of the first file to be compared.
If
.Ar file1
-is
-.Sq Fl ,
-the standard input is used.
-.Tp Ar file2
-A pathname of the second file to be compared.
-.Tp
+or
+.Ar file2
+is ``-'', the the standard input is used.
.Pp
The
.Nm cmp
utility exits with one of the following values:
-.Tw Ds
-.Tp 0
+.Bl -tag -width 4n
+.It 0
The files are identical.
-.Tp 1
+.It 1
The files are different; this includes the case
where one file is identical to the first part of
the other.
not been specified, cmp writes to standard error
that EOF was reached in the shorter file (before
any differences were found).
-.Tp >1
+.It >1
An error occurred.
-.Tp
+.El
.Sh SEE ALSO
.Xr diff 1 ,
.Xr diff3 1
The
.Nm cmp
function is expected to be POSIX 1003.2 compatible.
-This manual page is derived from the POSIX 1003.2 manual page.
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