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cmp(1)                           User Commands                          cmp(1)



NAME
       cmp - compare two files

SYNOPSIS
       cmp [-l] [-s] file1 file2 [skip1] [skip2]

DESCRIPTION
       The  cmp  utility  compares  two files. cmp will write no output if the
       files are the same. Under default options, if they differ, it writes to
       standard output the byte and line numbers at which the first difference
       occurred. Bytes and lines are numbered beginning with 1. 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; a leading 0 denotes octal.

OPTIONS
       The following options are supported:

       -l       Write  the  byte  number  (decimal)  and  the  differing bytes
                (octal) for each difference.



       -s       Write nothing for differing files; return exit statuses only.



OPERANDS
       The following operands are supported:

       file1    A path name of the first file to be compared. If file1  is  -,
                the standard input will be used.



       file2    A  path name of the second file to be compared. If file2 is -,
                the standard input will be used.



       If both file1 and file2 refer to standard input or refer  to  the  same
       FIFO  special,  block  special  or  character  special  file,  an error
       results.

USAGE
       See largefile(5) for the  description  of  the  behavior  of  cmp  when
       encountering files greater than or equal to 2 Gbyte (2**31 bytes).

EXAMPLES
       Example 1: Comparing files byte for byte

       The following example:

       example% cmp file1 file2 0 1024

       does  a byte for byte comparison of file1 and file2. It skips the first
       1024 bytes in file2 before starting the comparison.

ENVIRONMENT VARIABLES
       See environ(5) for descriptions of the following environment  variables
       that  affect the execution of cmp: LANG, LC_ALL, LC_CTYPE, LC_MESSAGES,
       and NLSPATH.

EXIT STATUS
       The following error values are returned:

       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.



       >>1       An error occurred.



ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:


       tab()     allbox;     cw(2.750000i)|    cw(2.750000i)    lw(2.750000i)|
       lw(2.750000i).   ATTRIBUTE  TYPEATTRIBUTE   VALUE   AvailabilitySUNWcsu
       CSIenabled Interface StabilityStandard


SEE ALSO
       comm(1), diff(1), attributes(5), environ(5), largefile(5), standards(5)



SunOS 5.10                        1 Feb 1995                            cmp(1)