cmp - compare two files
cmp [-l | -s] file1 file2 [skip1 [skip2]]
The cmp utility compares two files of any type and writes
the results to
the standard output. By default, cmp is silent if the files
same; if they differ, the byte and line number at which the
occurred is reported.
Bytes and lines are numbered beginning with one.
The options are as follows:
-l Print the byte number (decimal) and the differing
(octal) for each difference.
-s Print nothing for differing files; return exit status only.
The optional arguments skip1 and skip2 are the byte offsets
from the beginning
of file1 and file2, respectively, where the comparison will begin.
The offset is decimal by default, but may be expressed
as a hexadecimal
or octal value by preceding it with a leading
``0x'' or ``0''.
The cmp utility exits with one of the following values:
0 The files are identical.
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 -s option has not been specified, cmp writes to
that EOF was reached in the shorter file (before any
>1 An error occurred.
The cmp utility is expected to be IEEE Std 1003.2
A cmp command appeared in Version 1 AT&T UNIX.
OpenBSD 3.6 June 6, 1993
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