I am checking the files on 2 different system.

Source: Linux RHEL5 x86_64
Target: (2 or more machines) Windows XP, Windows Server 2008

Target has ActiveState Perl 5.8 (v5.8.8 built for MSWin32-x86-multi-thread) installed.

In my source machine the checksum is calculated for the input file and sent across. The checksum on Linux is calculated using "/usr/bin/cksum"

LINUX checksum value = 1345810991

In windows I am using unpack to calculate the checksum to verify if file is correct or not.

use strict;
use English;

my $file = <windows path which recieved the input file>/filename.txt
local $/ = undef;
open(FILE, $file) or die "Can't open '$file': $!";
binmode(FILE);
my $data = <FILE>;
close FILE;

my $cksum = unpack("%32C*",$data);
print "|$cksum|\n";

[download]



Windows checksum value: |24253975|

Basically, I am not getting the same values. What am I missing here? Is there any algorithm or method to imitate linux's cksum on Windows (perl)

Please note that the source is not under my control, so can't ask them to calculate the checksum using md5sum (and subsequently use Digest::MD5 in perl windows)

In reply to Find checksum (Linux) equivalent in Perl windows by mihirk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.