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.\"     @(#)cmp.1	8.1 (Berkeley) 6/6/93

.\"

.Dd June 6, 1993

.Dt CMP 1

.Os

.Sh NAME

.Nm cmp

.Nd compare two files

.Sh SYNOPSIS

.Nm cmp

.Op Fl l | Fl s

.Ar file1 file2

.Op Ar skip1 Op Ar skip2

.Sh DESCRIPTION

The cmp utility compares two files of any type and writes the results

to the standard output.

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.

.Pp

Bytes and lines are numbered beginning with one.

.Pp

The following options are available:

.Bl -tag -width flag

.It Fl l

Print the byte number (decimal) and the differing

byte values (octal) for each difference.

.It Fl s

Print nothing for differing files; return exit

status only.

.El

.Pp

The optional arguments

.Ar skip1

and 

.Ar skip2

are the byte offsets from the beginning of

.Ar file1

and

.Ar file2 ,

respectively, where the comparison will begin.

The offset is decimal by default, but may be expressed as an hexadecimal

or octal value by preceding it with a leading ``0x'' or ``0''.

.Pp

The

.Nm cmp

utility exits with one of the following values:

.Bl -tag -width 4n

.It 0

The files are identical.

.It 1

The files are different; this includes the case

where one file is identical to the first part of

the other.

In the latter case, if the

.Fl s

option has not been specified,

.Nm cmp

writes to standard output that EOF was reached in the shorter

file (before any differences were found).

.It >1

An error occurred.

.El

.Sh SEE ALSO

.Xr diff 1 ,

.Xr diff3 1

.Sh STANDARDS

The

.Nm cmp

utility is expected to be

.St -p1003.2

compatible.