compare two files
cmp [-l] [-s] file1 file2 [skip1 [skip2]]
The two files are compared.
(If either file1 or file2 is ``-'', the standard input is used.)
Under default options, cmp
makes no comment if the files are the same;
if they differ, it announces the byte and line number
at which the difference occurred.
If one file is an initial subsequence
of the other, that fact is noted.
skip1 and skip2
are initial byte offsets into
file1 and file2
respectively, and may be either octal or decimal;
the form of the number is determined by the environment variable
LC_NUMERIC (in the C locale, a leading 0 denotes an
(See LANG on
Print the byte number (decimal) and the
differing bytes (octal) for each difference.
Print nothing for differing files;
return codes only.
language-specific message file
(see LANG on
On detecting end of file, cmp prints the following to standard
UX:cmp: INFO: EOF on file
If POSIX2 is set, the diagnostic message on end of file is instead:
cmp: EOF on file
Exit code 0 is returned for identical
files, 1 for different files, and 2 for an
inaccessible or missing argument.
This command has been updated to handle files greater than 2GB.
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004