cmp - phpMan

CMP(1)                    BSD General Commands Manual                   CMP(1)

NAME
     cmp - compare two files

SYNOPSIS
     cmp [-l | -s] 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:

     -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.

     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 deci-
     mal by default, but may be expressed as an 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 standard output 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.

BSD                              June 6, 1993                              BSD

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