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Annotation of src/usr.bin/cmp/cmp.1, Revision 1.4

1.4     ! aaron       1: .\"     $OpenBSD: cmp.1,v 1.3 1998/05/26 07:22:21 deraadt 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.
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                     10: .\" Redistribution and use in source and binary forms, with or without
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                     15: .\" 2. Redistributions in binary form must reproduce the above copyright
                     16: .\"    notice, this list of conditions and the following disclaimer in the
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                     22: .\" 4. Neither the name of the University nor the names of its contributors
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                     26: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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                     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
        !            53: .Nm cmp
        !            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
                     63: The following options are available:
                     64: .Bl -tag -width flag
                     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
                     75: and
                     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
1.1       deraadt    83: or octal value by preceding it with a leading ``0x'' or ``0''.
                     84: .Pp
                     85: The
                     86: .Nm cmp
                     87: utility exits with one of the following values:
                     88: .Bl -tag -width 4n
                     89: .It 0
                     90: The files are identical.
                     91: .It 1
                     92: The files are different; this includes the case
                     93: where one file is identical to the first part of
                     94: the other.
                     95: In the latter case, if the
                     96: .Fl s
                     97: option has not been specified,
                     98: .Nm cmp
1.3       deraadt    99: writes to standard error that EOF was reached in the shorter
1.1       deraadt   100: file (before any differences were found).
                    101: .It >1
                    102: An error occurred.
                    103: .El
                    104: .Sh SEE ALSO
                    105: .Xr diff 1 ,
                    106: .Xr diff3 1
                    107: .Sh STANDARDS
                    108: The
                    109: .Nm cmp
                    110: utility is expected to be
                    111: .St -p1003.2
                    112: compatible.