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Annotation of src/usr.bin/cmp/cmp.1, Revision 1.9

1.9     ! aaron       1: .\"     $OpenBSD: cmp.1,v 1.8 2000/03/05 20:09:21 aaron Exp $
1.1       deraadt     2: .\"     $NetBSD: cmp.1,v 1.4 1995/09/08 03:22:55 tls Exp $
                      3: .\"
                      4: .\" Copyright (c) 1987, 1990, 1993
                      5: .\"    The Regents of the University of California.  All rights reserved.
                      6: .\"
                      7: .\" This code is derived from software contributed to Berkeley by
                      8: .\" the Institute of Electrical and Electronics Engineers, Inc.
                      9: .\"
                     10: .\" Redistribution and use in source and binary forms, with or without
                     11: .\" modification, are permitted provided that the following conditions
                     12: .\" are met:
                     13: .\" 1. Redistributions of source code must retain the above copyright
                     14: .\"    notice, this list of conditions and the following disclaimer.
                     15: .\" 2. Redistributions in binary form must reproduce the above copyright
                     16: .\"    notice, this list of conditions and the following disclaimer in the
                     17: .\"    documentation and/or other materials provided with the distribution.
                     18: .\" 3. All advertising materials mentioning features or use of this software
                     19: .\"    must display the following acknowledgement:
                     20: .\"    This product includes software developed by the University of
                     21: .\"    California, Berkeley and its contributors.
                     22: .\" 4. Neither the name of the University nor the names of its contributors
                     23: .\"    may be used to endorse or promote products derived from this software
                     24: .\"    without specific prior written permission.
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                     26: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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                     31: .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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                     33: .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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                     37: .\"
                     38: .\"     @(#)cmp.1      8.1 (Berkeley) 6/6/93
                     39: .\"
                     40: .Dd June 6, 1993
                     41: .Dt CMP 1
                     42: .Os
                     43: .Sh NAME
                     44: .Nm cmp
                     45: .Nd compare two files
                     46: .Sh SYNOPSIS
                     47: .Nm cmp
                     48: .Op Fl l | Fl s
                     49: .Ar file1 file2
                     50: .Op Ar skip1 Op Ar skip2
                     51: .Sh DESCRIPTION
1.4       aaron      52: The
1.6       aaron      53: .Nm
1.4       aaron      54: utility compares two files of any type and writes the results
1.1       deraadt    55: to the standard output.
                     56: By default,
                     57: .Nm
                     58: is silent if the files are the same; if they differ, the byte
                     59: and line number at which the first difference occurred is reported.
                     60: .Pp
                     61: Bytes and lines are numbered beginning with one.
                     62: .Pp
1.7       aaron      63: The options are as follows:
1.9     ! aaron      64: .Bl -tag -width Ds
1.1       deraadt    65: .It Fl l
                     66: Print the byte number (decimal) and the differing
                     67: byte values (octal) for each difference.
                     68: .It Fl s
                     69: Print nothing for differing files; return exit
                     70: status only.
                     71: .El
                     72: .Pp
                     73: The optional arguments
                     74: .Ar skip1
1.5       aaron      75: and
1.1       deraadt    76: .Ar skip2
                     77: are the byte offsets from the beginning of
                     78: .Ar file1
                     79: and
                     80: .Ar file2 ,
                     81: respectively, where the comparison will begin.
1.4       aaron      82: The offset is decimal by default, but may be expressed as a hexadecimal
1.8       aaron      83: or octal value by preceding it with a leading
                     84: .Dq 0x
                     85: or
                     86: .Dq 0 .
1.1       deraadt    87: .Pp
                     88: The
1.6       aaron      89: .Nm
1.1       deraadt    90: utility exits with one of the following values:
                     91: .Bl -tag -width 4n
                     92: .It 0
                     93: The files are identical.
                     94: .It 1
                     95: The files are different; this includes the case
                     96: where one file is identical to the first part of
                     97: the other.
                     98: In the latter case, if the
                     99: .Fl s
                    100: option has not been specified,
1.6       aaron     101: .Nm
1.8       aaron     102: writes to standard error that
                    103: .Dv EOF
                    104: was reached in the shorter
1.1       deraadt   105: file (before any differences were found).
                    106: .It >1
                    107: An error occurred.
                    108: .El
                    109: .Sh SEE ALSO
                    110: .Xr diff 1 ,
                    111: .Xr diff3 1
                    112: .Sh STANDARDS
                    113: The
1.6       aaron     114: .Nm
1.1       deraadt   115: utility is expected to be
                    116: .St -p1003.2
                    117: compatible.
1.8       aaron     118: .Sh HISTORY
                    119: A
                    120: .Nm
                    121: command appeared in
                    122: .At v1 .