CMP(1) General Commands Manual CMP(1)NAME
cmp - compare two files
SYNOPSIS
cmp [ -lsL ] file1 file2 [ offset1 [ offset2 ] ]
DESCRIPTION
The two files are compared. A diagnostic results if the contents differ, otherwise there is no output.
The options are:
l Print the byte number (decimal) and the differing bytes (hexadecimal) for each difference.
s Print nothing for differing files, but set the exit status.
L Print the line number of the first differing byte.
If offsets are given, comparison starts at the designated byte position of the corresponding file. Offsets that begin with 0x are hexadec-
imal; with 0, octal; with anything else, decimal.
SOURCE
/src/cmd/cmp.c
SEE ALSO diff(1)DIAGNOSTICS
If a file is inaccessible or missing, the exit status is If the files are the same, the exit status is empty (true). If they are the same
except that one is longer than the other, the exit status is Otherwise cmp reports the position of the first disagreeing byte and the exit
status is
CMP(1)
Check Out this Related Man Page
CMP(1) BSD General Commands Manual CMP(1)NAME
cmp -- compare two files
SYNOPSIS
cmp [-l | -s | -x] [-hz] file1 file2 [skip1 [skip2]]
DESCRIPTION
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 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.
The following options are available:
-h Do not follow symbolic links.
-l Print the byte number (decimal) and the differing byte values (octal) for each difference.
-s Print nothing for differing files; return exit status only.
-x Like -l but prints in hexadecimal and using zero as index for the first byte in the files.
-z For regular files compare file sizes first, and fail the comparison if they are not equal.
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''.
EXIT STATUS
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 standard error that EOF was reached in the shorter file (before any differences were
found).
>1 An error occurred.
SEE ALSO diff(1), diff3(1)STANDARDS
The cmp utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. The -h, -x, and -z options are extensions to the standard.
HISTORY
A cmp command appeared in Version 1 AT&T UNIX.
BSD November 18, 2013 BSD
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